TW201537887A - Concentrator photovoltaic system, method for detecting tracking deviation, method for correcting tracking deviation, control device, program for detecting tracking deviation, and, program for correcting tracking deviation - Google Patents

Abstract

Provided is a concentrator photovoltaic system including: a concentrator photovoltaic panel; a driving device configured to cause the concentrator photovoltaic panel to perform operation of tracking the sun; and a control device configured to detect a change pattern repeatedly occurring in temporal change in generated power of the concentrator photovoltaic panel, and configured to compare the detected change pattern with a form characteristic to deviation in an azimuth and a form characteristic to deviation in an elevation, to detect the presence/absence of deviation in tracking.

Description

Collecting type solar power generation system, tracking offset detection method, tracking offset correction method, control device, tracking offset detection program and tracking offset correction program

The present invention relates to a concentrating solar power generation (CPV: Concentrator Photovoltaic) that generates light by collecting sunlight on a power generating element.

In the concentrating type solar power generation, the basic configuration is a power generation element (solar battery) in which a collected solar light is incident on a small compound semiconductor having high power generation efficiency. Specifically, for example, a plurality of power-generating elements are mounted on an insulating substrate such as ceramics with wires attached to a light-collecting position, and the power generation power on each of the insulating substrates is collected by a wire (for example, reference is made to Patent Document 1).

When such a basic configuration is used as a concentrating solar power generation module, a plurality of the modules are arranged to form a concentrating solar power generation panel. Then, by causing the entire concentrating solar power generation panel to be tracked by the driving device so as to always face the sun, the desired generated electric power can be obtained. Basically, the tracking action relies on the tracking sensor and the sun according to the latitude, longitude and time of the setting place. Presumption of position. Regarding the setting error of the device, a technique of absorbing errors by software has been proposed (for example, see Patent Document 1).

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2009-186094

[Non-patent literature]

[Non-Patent Document 1] "Failure Modes of CPV Modules and How to Test for Them", [online], February 19, 2010, Emcore Corporation, [Search on March 7, 2013], Internet <URL: Http://www1.eere.energy.gov/solar/pdfs/pvrw2010_aeby.pdf#search='emcore Pointfocus Fresnel Lens HCPV System'〉

However, the tracking sensor cannot be said to have no errors at all, but has the possibility of generating a tracking offset. Further, due to the long-term use, deformation occurring on the concentrating solar power generation panel or the gantry side supporting the panel may cause tracking deviation.

However, even if a more or less tracking offset occurs, the generated electric power can be obtained as long as the collected sunlight does not largely deviate to the extent that it completely leaves the light-emitting element. Therefore, it is difficult to be self-tracking offset found. In addition, the technology for judging its condition has not been proposed.

In view of the related problems, an object of the present invention is to provide a technique for at least finding an offset of solar tracking by concentrating solar power generation.

The concentrating solar power generation system of the present invention includes: a concentrating solar power generation panel; and a driving device for causing the concentrating solar power generation panel to perform a tracking operation on the sun, and detecting the concentrating type A variation pattern in which the power generated by the solar power generation panel changes over time is detected by comparing the detected fluctuation pattern with the characteristic pattern of the unique pattern and the elevation angle appearing in the azimuth shift. Whether there is a tracked offset control device.

In the concentrating solar power generation system described above, based on the fluctuation pattern that occurs repeatedly with respect to the generated power, the information on the tracking offset is included, and the detected variation pattern and azimuth angle are compared. The unique pattern of the offset and the elevation offset appear, and it is possible to detect whether there is a tracking offset. That is, the tracking offset of the sun can be found from the change in the generated power over time.

Further, the present invention is a method for detecting a tracking offset of a concentrating solar power generation device that drives a concentrating solar power generation panel to perform a tracking operation on the sun, and detects the concentrating sunlight. The mode of variation included in the power generation of the power generation panel as a function of time, by comparing the detected variation pattern with the azimuth offset A unique type of state and elevation offset, and a method of detecting whether there is a tracking offset of the tracking offset.

In the foregoing method of detecting the tracking offset, according to the power generation The variation pattern of power over time changes, including the information about the tracking offset, by comparing the detected variation pattern and the azimuth offset to the unique pattern and elevation offset Unique type, and can detect whether there is a tracking offset. That is, the tracking offset of the sun can be found from the change in the generated power over time.

In addition, the present invention is provided with concentrating solar power generation The concentrating solar power generation device of the driving device that performs the tracking operation of the sun on the panel performs the detection of the generated electric power of the concentrating solar power generation panel and the control device that controls the driving device The correction method of the trace offset detects a variation pattern included in the power generation power of the concentrating solar power generation panel as a function of time, and compares the detected variation pattern with a characteristic pattern of azimuth deviation And the characteristic type of the elevation offset, and detecting whether there is a tracking offset. In the case of the offset, the axis of the offset in the two axes of the azimuth and elevation is specified, and the driving device is specified. The correction method of the tracking offset of the correction of the angle of the axis.

In the aforementioned method of correcting the tracking offset, according to the power generation The variation pattern of power over time changes, including the information about the tracking offset, by comparing the detected variation pattern and the azimuth offset to the unique pattern and elevation offset Unique type. Comparing the results, if the change pattern has no signs of tracking offset, follow The trace will proceed normally. Further, when the result of the comparison is found to be offset, the axis of the two axes of the azimuth and the elevation angle is specified by the similarity of the pattern of the fluctuation mode, and the correction of the angle of the specific axis is instructed to the drive device. Thereby, the offset is surely corrected. That is, a technique for finding the tracking offset of the sun from the change in the generated power over time and canceling the offset can be provided.

In addition, the present invention also includes the use of: collecting light A solar power generation panel and a control device for a concentrating solar power generation system that drives the concentrating solar power generation panel to perform a tracking operation on the sun, and the concentrating sunlight is detected and mounted A variation pattern in which the power generation power of the power generation panel changes over time is detected by comparing the detected fluctuation pattern with the characteristic pattern of the unique pattern and the elevation angle appearing in the azimuth shift, and detecting whether there is any The function of the tracking offset.

In addition, the present invention also includes the use of: collecting light The detection system of the tracking offset of the solar photovoltaic power generation panel and the concentrating solar power generation system of the driving device that performs the tracking operation on the sun by the concentrating solar power generation panel, A variation pattern in which the power generated by the concentrating solar power generation panel changes over time, and the characteristic pattern of the characteristic pattern and the elevation angle appearing by the deviation of the azimuth angle by comparing the detected fluctuation pattern, The program for detecting whether there is a tracking offset or not is implemented by a computer.

In addition, the present invention also includes the use of: collecting light Solar photovoltaic power generation panel, and the above-mentioned concentrating solar power generation panel A correction program for the tracking offset of the concentrating solar power generation system of the drive device for tracking the sun, which detects that the power generation of the concentrating solar power generation panel changes over time. The variation mode detects the presence or absence of the tracking offset by comparing the detected variation pattern with the characteristic pattern of the unique pattern and the elevation offset appearing in the azimuth offset, and in the foregoing In the case of the tracking offset, the axis for generating the offset in the two axes of the azimuth and the elevation angle is a program for realizing the correction of the angle of the specific axis to the drive device by a computer.

According to the concentrating solar power generation system and the tracking offset detecting method of the present invention, the tracking shift of the sun can be found by the fluctuation pattern of the generated electric power of the concentrating solar power generation.

1‧‧‧Light collecting solar power panel

1M‧‧‧Light collecting solar power module

3‧‧‧Rack

3a‧‧‧ pillar

3b‧‧‧ Foundation

4‧‧‧ tracking sensor

5‧‧‧Direct sunshine meter

5A‧‧‧All day sunshine

11‧‧‧Shell

11a‧‧‧ bottom

11b‧‧‧锷

12‧‧‧Flexible printed wiring board

13‧‧1 times light collection department

13f‧‧‧ Fresnel lens

14‧‧‧Connector

100‧‧‧Light collecting solar power generation device

121‧‧‧Flexible substrate

122‧‧‧Power generation components

123‧‧‧2 times light collection department

200‧‧‧ drive

201a‧‧‧stepper motor

201e‧‧‧stepper motor

202‧‧‧ drive circuit

300‧‧‧Power Meter

400‧‧‧Control device

500‧‧‧Communication device

501‧‧‧Recording media

502‧‧‧Communication lines

503‧‧‧Server

SP‧‧‧Light spot

Fig. 1 is a perspective view showing an example of a concentrating solar power generation device.

Fig. 2 is a perspective view (partial cutaway) showing an example of an enlarged display concentrating solar power generation module.

Figure 3 is an enlarged view of the portion III of Figure 2.

Fig. 4 is a perspective view showing a state in which the concentrating solar power generation device including 64 (vertical 8 × horizontal 8) modules having a substantially square array is arranged as "one", and 15 devices are arranged in the field.

Fig. 5 is a view showing measured values of power generation power of 15 concentrating solar power generation apparatuses in a time zone (11 to 12 o'clock) in the vicinity of the positive southern time of the sun.

Fig. 6 is a view showing four patterns of characteristic variation patterns of waveforms taken out.

Fig. 7 is a view showing a pattern (a) and a projection of a position where a light collecting point is formed on a light-emitting element.

Fig. 8 is a view showing a pattern (b) and a projection view of a position where a light collecting point is formed on a light-emitting element.

Fig. 9 is a view showing a mode (c) and a projection of a position where a light collecting point is formed on a light-emitting element.

Fig. 10 is a view showing a mode (d) and a projection view of a position where a light collecting point is formed on a light emitting element.

Fig. 11 is a view showing a period in which the tracking operation is stopped in the vicinity of the positive southern time where the elevation angle hardly changes until the tracking is resumed, for example, a graph of how the power generation is lowered for one module is investigated.

Fig. 12 is a view showing a correction example of the elevation angle.

Fig. 13 is a view showing an example of the concentrating solar power generation system seen from the point of the tracking operation.

Fig. 14 is a flowchart (1/2) showing a process of detecting and correcting the tracking offset performed by the control means.

Fig. 15 is a flowchart (2/2) showing a process of detecting and correcting the tracking offset performed by the control means.

Fig. 16 is a view showing another example of the concentrating solar power generation system seen from the point of the tracking operation.

Fig. 17 is a view showing another example of the concentrating solar power generation system.

Fig. 18 is a view showing another example of the concentrating solar power generation system.

Fig. 19 is a view showing another example of the concentrating solar power generation system.

[The gist of the implementation type]

As the gist of the embodiment of the present invention, at least the following points are included.

(1) The concentrating solar power generation system includes: a concentrating solar power generation panel; and a driving device for causing the concentrating solar power generation panel to perform a tracking operation on the sun, and detecting the collected light The variation pattern of the generated power of the solar photovoltaic panel changes over time, and the detection is detected by comparing the detected variation pattern with the unique pattern of the azimuth offset and the elevation offset. A control device that indicates whether there is a tracking offset.

In the concentrating solar power generation system described above, based on the fluctuation pattern that occurs repeatedly with respect to the generated power, the information on the tracking offset is included, and the detected variation pattern and azimuth angle are compared. (Azimuth) The unique pattern of the offset of the characteristic type and the elevation (Elevation) appears, and it is possible to detect whether there is a tracking offset. That is, the tracking offset of the sun can be found from the change in the generated power over time.

(2) In the concentrating solar power generation system according to (1) above, the control device may be adapted to the case where the tracking is shifted. The axis of the offset in the two axes of the azimuth and elevation is determined, and the drive device is instructed to correct the angle of the specific axis.

In this case, by specifying the axis at which the offset occurs, the drive device is only corrected for the angle of the specific axis, and the offset is surely corrected. That is, a technique for finding the tracking offset of the sun from the change in the generated power over time and canceling the offset can be provided.

(3) In the concentrating solar power generation system according to (2), the control device has a zigzag variation pattern included in the fluctuation mode.

(a) Any mode in which the increase is gradually increased while the stride is changed, and (b) any mode in which the decrease is gradually decreased and the stride is changed, and the sign of the angle to be corrected may be determined.

In this case, it is possible to appropriately judge whether the angle is to be corrected in the positive direction or to be corrected in the negative direction.

(4) In the concentrating solar power generation system according to the above (2) or (3), the control device is configured to reduce the generated power generated by the generated power in the case where there is no offset, which is stored in advance. The absolute value of the angle that should be corrected can also be determined.

In this case, for example, an offset can be intentionally generated, and the relationship between the offset and the reduction in generated power can be accurately grasped in advance. In addition, this method can also be applied to a variation mode of either azimuth offset or elevation offset.

(5) In the concentrating solar power generation system according to the above (2) or (3), the control device may determine the absolute value of the angle to be corrected based on the change ratio of the generated electric power to the tracking operation.

In this case, the relationship between the offset and the change ratio of the generated power can be accurately grasped in advance. Further, it is also applicable to a variation mode of any one of an azimuth offset or an elevation offset. Further, the fluctuation pattern of the mixed azimuth offset and the elevation offset can be suitably applied.

(6) The concentrating solar power generation system according to any one of (2) to (5), wherein the concentrating solar power generation panel has a direct sunlight meter, and the control device is only detected by the direct sunlight meter When the arrival sunshine intensity is greater than or equal to a specific value, the above correction may be performed.

In this case, since it is corrected in the sunny day when the sun is stable, it is possible to eliminate the influence of the cloud on the direct sunlight intensity.

(7) In the concentrating solar power generation system according to any one of the above (2) to (6), the control device may perform the correction in a time zone in which the sun moves to the south.

In this case, since the elevation angle is stable and almost constant, it is easy to detect the variation pattern according to the azimuth shift.

(8) In addition, in the concentrating solar power generation system according to any one of the above (2) to (5), a full-day sunshine meter or a full-day sunshine of the horizontal plane is provided as a full-day sunshine meter, and the normal plane In the case of all-day sunshine, only when the normal-day sunshine intensity of the normal surface detected by the full-day sunshine of the normal surface is a specific value or more, and the full-day sunshine of the horizontal plane, only the full-day sunshine of the horizontal plane When the detected full-day sunshine intensity of the horizontal plane is equal to or greater than a specific value, the above correction may be performed.

In this case, the full-day sunshine of the normal surface or the full-day sunshine of the horizontal plane is not easily affected by the built-in sunshine sensor compared with the direct sunlight meter. The effect of dirty windows. In addition, there is less problem with the tracking offset in which the direct sunlight meter becomes an important cause of measurement error. That is to say, regarding the actual measurement of the intensity of sunlight, there is a case where more reliable information can be obtained.

(9) In addition, the collecting sun of any of the above (2) to (8) The photovoltaic power generation system may further include a communication device that transmits a measurement signal of the power meter that measures the generated power and simultaneously receives a correction signal sent to the driving device; and the control device is disposed away from the concentrating solar power generation The panel and the location of the driving device communicate with the communication device via a communication line to perform reception of the measurement signal and transmission of the correction signal.

In this case, since the offset of the tracking can be corrected by the remote control of the communication line, it is suitable for centralized management from a distance.

(10) On the other hand, as a method of detecting the tracking offset, it is a concentrating solar power generation device including a driving device that performs a tracking operation on the sun by the concentrating solar power generation panel. The detection method of the trace offset detects a variation pattern included in the power generation power of the concentrating solar power generation panel as a function of time, and compares the detected fluctuation pattern with a characteristic pattern of azimuth deviation And the characteristic type of the elevation offset, and detecting whether there is a tracking offset of the tracking offset.

In the above-described tracking offset detection method, based on the fluctuation pattern that occurs repeatedly with respect to the generated power, the information on the tracking offset is included, and the detected variation pattern and azimuth angle are compared. The unique pattern of the offset and the elevation offset appear, but It is detected whether there is a tracking offset. That is, the tracking offset of the sun can be found from the change in the generated power over time.

(11) In addition, the field as a correction method of tracking offset In the concentrating solar power generation device including the driving device that causes the concentrating solar power generation panel to perform the tracking operation on the sun, the detection power and the power generation of the concentrating solar power generation panel are performed. The method of correcting the tracking offset performed by the control device controlled by the driving device detects a variation pattern included in the power generation power of the concentrating solar power generation panel with time, and compares the detected fluctuation pattern. The characteristic pattern of the characteristic type and the elevation angle offset appearing with the azimuth offset, and detecting whether there is a tracking offset, and in the case of the offset, the azimuth and the elevation angle are specified in the two axes. A method of correcting the tracking offset of the correction of the angle of the specific axis to the axis of the drive.

In the above-described tracking offset correction method, based on the fluctuation pattern that occurs repeatedly with respect to the generated power, the information on the tracking offset is included, and the detected variation pattern and azimuth angle are compared. The unique type of the offset and the elevation offset appear. As a result of the comparison, if the change pattern does not have a sign of the tracking offset, the tracking will proceed normally. Further, when the result of the comparison is found to be offset, the axis of the two axes of the azimuth and the elevation angle is specified by the similarity of the pattern of the fluctuation mode, and the correction of the angle of the specific axis is instructed to the drive device. Thereby, the offset is surely corrected. That is, a technique for finding the tracking offset of the sun from the change in the generated power over time and canceling the offset can be provided.

(12) In addition, the correction of the tracking offset of (11) above The method can also measure the change of the generated electric power with time in a state in which one of the azimuth and the elevation angle is fixed in advance, and first investigate the reduced generated electric power corresponding to the generated electric power in the case where there is no offset. The offset of one of the angles.

In this case, the tracking offset is forcibly caused, and the angular offset corresponding to the reduced generated power can be easily investigated.

(13) In addition, the present invention also includes the use of: concentrating type A solar power generation panel and a control device for a concentrating solar power generation system that drives the concentrating solar power generation panel to perform a tracking operation on the sun, and the concentrating solar power generation is detected The variation pattern of the generated power of the panel over time changes by comparing the detected variation pattern with the characteristic pattern of the unique pattern and the elevation offset appearing from the azimuth offset, and detecting whether there is a loop The function of the offset of the trace.

In the foregoing control device, based on the change pattern of the generated power over time, the information about the tracking offset is included, and the detected variation pattern and the azimuth offset appear. The unique type and the elevation type of the elevation offset can detect whether there is a tracking offset. That is, the tracking offset of the sun can be found from the change in the generated power over time.

(14) In addition, the control device of the above (13) may be mounted. In the case where the tracking offset is present, the axis of the offset in the two axes of the azimuth and elevation is specified, and the function of correcting the angle of the specific axis to the drive device is specified.

In this case, by specifying the axis at which the offset occurs, the drive device is only corrected for the angle of the specific axis, and the offset is surely corrected. That is, a technique for finding the tracking offset of the sun from the change in the generated power over time and canceling the offset can be provided.

(15) Further, in the control device of the above (13) or (14), the above-described function can also be realized by a semiconductor integrated circuit.

In this case, since a necessary functional semiconductor integrated circuit can be mounted on, for example, a single wafer IC, the concentrating solar power generation system can be easily manufactured. Further, the semiconductor integrated circuit can be manufactured at low cost.

(16) The present invention further includes a concentrating solar power generation system including a concentrating solar power generation panel and a driving device that performs a tracking operation on the sun by the concentrating solar power generation panel. The tracking offset detection program detects a variation pattern of the generated power of the concentrating solar power generation panel over time, and compares the detected fluctuation pattern with the azimuth angle The unique pattern of the unique pattern and the elevation offset appearing, and the function of detecting the presence or absence of the tracking offset is realized by the computer.

In the above-described tracking offset detection program, based on the variation pattern of the generated power over time, the knowledge about the tracking offset is included, and the detected variation pattern and azimuth angle are compared. The unique pattern of the offset and the elevation offset appear, and it is possible to detect whether there is a tracking offset. That is, the tracking offset of the sun can be found from the change in the generated power over time. Furthermore, the necessary functions are programmed, so the manufacture of the concentrating solar power generation system becomes easy. Some of the concentrating solar power generation systems are also easy to add, and the system upgrade is also very easy.

(17) In addition, the present invention also includes the use of: concentrating type A correction program for tracking offset of a solar power generation panel and a concentrating solar power generation system for driving the concentrating solar power generation panel to perform tracking on the sun, and detecting the set The variation pattern of the generated power of the light-type solar power generation panel repeatedly changes with time, and by comparing the detected fluctuation pattern, the characteristic pattern and the elevation pattern unique to the azimuth deviation appear. Detecting whether there is a function of the tracking offset, and in the case of the aforementioned tracking offset, the axis of the offset in the two axes of the azimuth and elevation is specified, and the angle of the specific axis is indicated to the driving device. The function of the correction, the program used by the computer.

In the above-mentioned tracking offset correction program, based on the variation pattern of the generated power over time, the information about the tracking offset is included, and the detected variation pattern and azimuth angle are compared. The unique type of the offset and the elevation offset appear. As a result of the comparison, if the change pattern does not have a sign of the tracking offset, the tracking will proceed normally. Further, when the result of the comparison is found to be offset, the axis of the two axes of the azimuth and the elevation angle is specified by the similarity of the pattern of the fluctuation mode, and the correction of the angle of the specific axis is instructed to the drive device. Thereby, the offset is surely corrected. That is, a technique for finding the tracking offset of the sun from the change in the generated power over time and canceling the offset can be provided. Furthermore, the necessary functions are programmed, so the manufacture of concentrating solar power generation systems It is easy to add functions to the existing concentrating solar power generation system. In addition, the system upgrade is easy.

Further, the programs of the above (16) and (17) can be recorded on a computer-readable recording medium.

In this case, the program is recorded on the recording medium and can be recorded in the form of a medium for distribution.

[Details of implementation type] "An example of concentrating solar power generation device"

Hereinafter, the details of the embodiments of the present invention will be described with reference to the drawings. First, the configuration of the concentrating solar power generation device will be described.

Fig. 1 is a perspective view showing an example of a concentrating solar power generation device. In the drawing, the concentrating solar power generation device 100 includes a concentrating solar power generation panel 1 that supports the pillar 3a on the back side and a gantry 3 including the base 3b. The concentrating solar power generation panel 1 is formed by integrating a plurality of concentrating solar power generation modules 1M vertically and horizontally. In this example, in addition to the central portion, 62 (longitudinal 7×horizon 9-1) concentrating solar power generation modules 1M are stacked vertically and horizontally. When the rated output of the concentrating solar power generation module 1M is, for example, about 100 W, it is a rated output of about 6 kW as the entire concentrating solar power generation panel 1 .

A driving device (not shown) is provided on the back side of the concentrating solar power generation panel 1. By operating the zone device, the concentrating solar power generation panel can be driven on two axes of azimuth and elevation. 1. Thereby, the concentrating solar power generation panel 1 is always on both the azimuth angle and the elevation angle. The direction toward the sun is driven by a stepping motor (not shown). The tracking sensor 4 and the direct sunlight meter 5 are provided in any place of the concentrating solar power generation panel 1 (in this case, a central portion) or in the vicinity of the panel 1. The tracking action of the sun depends on the tracking sensor 4 and the position of the sun calculated from the latitude, longitude, and time of the installation site.

That is, the aforementioned driving device moves a certain angle with the sun The driving concentrating solar power panel 1 only moves the specific angle. The indication of the movement of a certain angle can also be determined by the tracking sensor 4, or by the latitude/longitude/time. That is, there is also a case where the tracking sensor 4 is omitted. The specific angle is, for example, a certain value, but can be changed with the height or time of the sun. Further, the use of the stepping motor is only an example, and other driving sources that can perform precise operations can be used.

"An example of concentrating solar power generation module"

FIG. 2 is a perspective view (partial cutaway) showing an example of an enlarged display concentrating solar power generation module (hereinafter, simply referred to as a module) 1M. In the drawing, the module 1M includes a casing-shaped (rod-shaped) casing 11 having a bottom surface 11a, and a flexible printed wiring board 12 attached to the bottom surface 11a is attached to the casing 11 as a cover. The primary light collecting unit 13 of the crotch portion 11b serves as a main constituent element. The casing 11 is made of metal.

The light collecting portion 13 is a Fresnel lens array. The column is formed as a lens element for collecting sunlight, and a plurality of Fresnel lenses 13f (for example, vertical 16 × horizontal 12, 192) are arranged in a matrix. Such a light collecting portion 13 can be, for example, glass The glass plate is a substrate, and a polyoxyphthalate film is formed on the back surface (inside). A Fresnel lens is formed on this resin film. A connector 14 for taking out the output of the module 1M is provided outside the casing 11.

Figure 3 is an enlarged view of the portion III of Figure 2. Figure 3, flexible The printed wiring board 12 includes a strip-shaped flexible substrate 121, a power generating element (solar battery) 122 thereon, and a secondary light collecting portion 123 provided to cover the power generating element 122. The components of the power generating element 122 and the secondary light collecting unit 123 are provided at positions corresponding to the Fresnel lenses 13f of the primary light collecting unit 13, and only the same number is provided. The second light collecting portion 123 collects the sunlight incident by the Fresnel lens 13f on the power generating element 122. The secondary light collecting portion 123 is, for example, a lens. However, it is also a mirror that allows light to be reflected while being guided downward. In addition, there are cases where the light collecting unit is not used twice. Each of the power generating elements 122 is electrically connected in series by the flexible printed wiring board 12, and the bundled generated electric power is taken out by the connector 14 (FIG. 2).

Moreover, the module 1M shown in FIGS. 2 and 3 is only one. For example, the composition of the module can have other forms. For example, a flexible printed circuit board other than the above may be used, and a resin plate or a ceramic substrate having a plurality of flat shapes (such as a rectangular shape) may be used.

"Setting Examples of Multiple Collecting Light Solar Power Generators"

In the concentrating solar power generation device 100 configured as described above, the panel configuration (the number or arrangement of the modules 1M) can be freely changed as necessary. In addition, the shape of the module can also be formed into a rectangle, a square, and other shapes. shape. For example, FIG. 4 shows a state in which the concentrating solar power generation device 100 including 64 blocks (vertical 8×horizon 8) of a substantially square module is arranged as “one unit”, and the device is arranged in a field of 15 units. Stereo picture. Each of the stages is driven to follow the sun by a separate driving device (not shown). Here, for the sake of convenience, the 15 concentrating solar power generators 100 are indicated by the following symbols (also shown in FIG. 4).

4 at the top: 1A, 1B, 1C, 1D

4 in the second column: 2A, 2B, 2C, 2D

5 in the third column: 3A, 3B, 3C, 3D, 3E

2 in the fourth column: 4D, 4E

"Example of Power Generation Change with Time"

Fig. 5 is a view showing measured values of power generation power of 15 concentrating solar power generation apparatuses 100 (1A to 4E) in a time zone (11 to 12 o'clock) in the vicinity of the positive southern time of the sun. The horizontal axis of each graph represents time, and the vertical axis represents electric power. What should be noted here is not the difference between the generated powers in each station, but the variation characteristics contained in each waveform.

In other words, most of the waveforms have a zigzag step (sawtooth) showing a mechanical change, and two variations of the fluctuations in a short period and the fluctuations in a relatively long period are observed. The reason for the change is that the tracking is offset. In other words, when there is no tracking offset, the stepping motor does not cause a large fluctuation in the generated power before and after the operation (tracking operation). However, when the tracking is shifted, the stepping motor is operated before and after. There will be large changes in power generation. Therefore, it can be interpreted as: stepper motor The traces of the action will be presented by a relatively large change in the generated electricity. Because it is a map near the southern moment, the change in elevation is the least within a day. That is, a longer period (a period of 2 to 5 minutes) is caused by a tracking offset of the elevation angle. In addition, a shorter period (period of 20 seconds to 60 seconds) is caused by a tracking offset of the azimuth.

"Example of the pattern of change of characteristics"

Fig. 6 is a view showing four patterns of characteristic variation patterns of waveforms taken out. The horizontal axis of each graph is time, and the vertical axis is generated electric power. In the upper left mode (a), the maximum variation of the generated electric power is as small as 300 W (about 4% of the total), and the tracking offset is as small as tolerable, and it is a stable state in which a good tracking operation is performed. Fig. 7 is a view showing a pattern (a) of Fig. 6 and a projection view of a position where the light collecting point SP is formed on the power generating element 122. In addition, the position on the map is shown in broken lines, and the relationship with the projected image. As shown in the figure, in the projection view at the left end, the light collecting point SP is slightly deviated from the power generating element 122, and the whole is in a substantially good state. That is to say, there is no tracking offset in such an occasion, and there is no need to correct it.

Returning to Figure 6, the upper right mode (b), between 11:56 and 57, and between 12:0 and 1 minute, produces a large change, repeated over a longer period of about 4 minutes. . This is a trace of the stepping motor action in the state where the tracking of the elevation angle is shifted. Fig. 8 is a view showing a pattern (b) of Fig. 6 and a projection view of a position where the light collecting point SP is formed on the power generating element 122. In addition, the position on the map is shown in broken lines, and the relationship with the projected image. As shown in the figure, at the left end of the projection map, the collection point SP deviates greatly Power generation element 122. Thereafter, the region where the light collecting point SP gradually enters the power generating element 122 is repeatedly reversed, and when the stepping motor operates, it is again largely deviated. That is, in such a case, it is necessary to correct the tracking offset of the elevation angle. Further, in this case, the fluctuation mode is constituted by the repetition of the large fluctuation and the small variation therebetween. Between the large fluctuation and the next large fluctuation, the generated electric power tends to increase, and the fluctuation of the generated electric power tends to decrease when the stepping motor operates. In such a variation mode, the display angle offset is shifted in the forward direction. In addition, the smaller fluctuation range is the maximum of 200 W (10% or less of the whole), and can be regarded as a fluctuation component, so it is not a correction target.

Going back to Figure 6, the bottom left mode (c) is 20 to 30 seconds. The cycle has changed dramatically. This is a trace of the stepping motor action in a state where the azimuth tracking is shifted. Fig. 9 is a view showing a pattern (c) of Fig. 6 and a projection view of a position where the light collecting point SP is formed on the power generating element 122. In addition, the position on the map is shown in broken lines, and the relationship with the projected image. The projection image on the left side is a state after the stepping motor is operated, and the light collecting point SP preferably enters the region of the power generating element 122. From here on, as the azimuth of the sun moves, the generated electric power gradually decreases and reaches the state of the projection image on the right side. Then the stepper motor moves again to form a repeat. That is, in such a case, it is necessary to correct the tracking offset of the azimuth. Further, in this case, the fluctuation of the constant gradient tends to decrease between the large fluctuations, and the fluctuation of the generated electric power tends to increase during the operation of the stepping motor. In such a variation mode, the display angle offset is shifted in the delay direction.

Returning to Figure 6, the mode (d) at the bottom right is for modes (b) and (c). Compound. That is, here, both the tracking of the azimuth angle and the tracking of the elevation angle are offset. Fig. 10 is a view showing a pattern (d) of Fig. 6 and a projection view of a position where the light collecting point SP is formed on the power generating element 122. In addition, the position on the map is shown in broken lines, and the relationship with the projected image. As shown in the figure, the projection view on the left side and the projection view on the right side, the collection point SP is relatively largely deviated from the area of the power generating element 122 (but the diagram on the right side is relatively small). That is, in such a case, it is necessary to correct the tracking offset of the azimuth angle and the tracking offset of the elevation angle. In the large fluctuation of about 11:57, the power generation power of the whole is increased from the large fluctuation of about 12:10, and the change in the operation of the stepping motor in response to the large fluctuation is reduced. It occurs for a longer period of about 3 minutes. In addition, about 11:56:15, 11:57:02, 11:57:48, 11:58:34, 11:59:20, the moderate change in size Between the change and the fluctuation, the generated electric power tends to decrease, and the change in the stepping motor operation with a moderate degree of change exhibits an increasing direction. This moderate change occurs with a period of approximately 46 seconds. The former corresponds to the offset of the elevation angle and the latter corresponds to the offset of the azimuth angle. In such a case, first, a method of returning to the starting point of the step after correcting one offset angle may be employed, and a method of correcting the offset angle of the other axis before returning to the starting point may be employed. In addition, the small-scale change (less than 10% of the total) of the fluctuation amount less than 100 W is regarded as a fluctuation component, so it is excluded from the correction target.

"Regulation on Change Mode"

As described above, it is possible to know the fluctuation pattern generated by the power generation power over time, including the information about the tracking offset. If the change mode does not have a sign of the tracking offset (mode (a)), the tracking will proceed normally. In addition, by comparing the detected variation pattern, the unique pattern (mode (c)) appearing in the unique pattern (mode (b)) and the azimuth offset appearing from the elevation angle offset can be detected. Is there a tracking offset?

Further, by comparison, it is possible to specify the axis of the offset from the two axes of the azimuth and elevation by the similarity of the pattern of the fluctuation mode. Then, the angle correction of the specific axis is performed, and the tracking offset can be cancelled. Further, as a specific comparison method, for example, it is possible to detect a period in which a fluctuation of a large fluctuation range exceeding a threshold value is generated, and compare the period with a time required for the sun to move at a certain angle in the elevation direction or the azimuth direction at the time. determination.

As described above, according to the variation pattern of the generated power, The detection of the presence or absence of the tracking offset produces the specificity of the tracking offset axis (azimuth/elevation angle), and the directionality of the fluctuation, that is, the zigzag variation pattern included in the variation mode, is (a) gradually increasing. The mode that is reduced when the stride is changed, and (b) any of the modes that are gradually reduced and increased when the stride is changed, and the sign of the angle that should be corrected is known, in order to perform appropriate correction, to further know The absolute value (correction amount) of the angle that should be corrected is preferable.

"Methods for determining the amount of correction 1"

Here, the correction amount for the case of the above mode (b) or (c) will be described. Decide method 1. When the mode (b) or (c), that is, the tracking offset is one of the elevation angle and the azimuth angle, the change of the generated power with time can be measured by preliminarily fixing one of the elevation angle and the azimuth angle. First, the offset of the angle corresponding to the other of the reduced generated electric power observed by the generated electric power in the case where there is no offset is first investigated. Thereby, the tracking offset is forcibly caused, and the angular offset corresponding to the reduced generated power can be easily investigated.

For example, FIG. 11 shows a period (OFF-AXIS period) in which the tracking operation is stopped in the vicinity of the positive southern time when the elevation angle hardly changes until the tracking is resumed, and for example, a graph of how the generated power is lowered is investigated for one module. By stopping the tracking (time 12:05), the tracking offset of the azimuth angle is gradually increased, and with this, the generated power is lowered. In other words, by performing such an experiment in advance, background data (data for correction amount extraction) showing the relationship between the decrease in the generated power and the offset amount of the azimuth angle is obtained.

Table 1 below is an example of background information showing the relationship between the offset amount D of the angle and the power generation power ratio RA.

The aforementioned power generation ratio is based on the intensity of sunshine The ratio of generated electricity after normalization. RA system (power generated in the case of an offset) / (power generation in the case where the offset is 0). When the Fresnel lens and the power generating element are both square, the relationship between the elevation angle and the azimuth angle is the same as the power generation power ratio RA of the offset D, and the same data can be used for the determination of the correction amount. When the relationship is different, it is only necessary to prepare such information for the elevation/azimuth angle.

In addition, the tracking stand is stepped (according to the stepper motor) The ratio of the offset amount in the case of driving to the power generation before and after driving is, for example, Table 2 below.

The power generation power ratio described above is a ratio of generated power after normalization of the sunshine intensity. In this case, the step drive angle is approximately 0.35 degrees. When power generation is reduced by stepping drive, RB = (power generation amount after stepping drive) / (power generation amount before stepping drive). Further, when power generation is increased by stepping drive, RB = (power generation amount before stepping drive) / (power generation amount after stepping drive).

When the Fresnel lens and the power generating element are both square, the relationship between the elevation angle and the azimuth angle is the same as the relationship between the generated power and the RB of the offset D, and the same information can be used for the determination of the correction amount. relationship In different cases, it is only necessary to prepare such information for the elevation/azimuth angle.

Using such information, power generation by occasion without offset In terms of power, depending on the reduced generated power, it is possible to determine the absolute value of the angle that should be corrected in the case where the tracking offset is generated again. Further, in the example of Fig. 11, strictly speaking, the reduction of the generated electric power due to the offset of the elevation angle is included, but the value is small as compared with the offset of the azimuth angle, so that it is ignored. However, in order to further improve the accuracy, for example, only the tracking of the azimuth is stopped, and the tracking of the elevation angle is continued, it is possible to investigate in advance the decrease in the generated electric power caused only by the azimuth shift.

In addition, conversely, only the tracking of the elevation angle is stopped, and if the azimuth is continued, the decrease in the generated electric power due to the offset of the elevation angle can be investigated in advance. This method can also be applied to the case of mode (d), but the error becomes large when the degree of azimuth offset and elevation offset are large, and the method described below can also be applied.

"Methods for determining the amount of correction 2"

Next, a method 2 for determining the correction amount applicable to any of the modes (b), (c), and (d) will be described. That is, this method is also applicable to the case where the tracking offset is mixed in addition to the case where only one of the azimuth/elevation angles produces a tracking offset. First, a rotation operation based on a minimum rotation angle of the stepping motor, for example, an azimuth angle of 0.1 degrees, is performed in a state where none of the azimuth angle and the elevation angle is offset, and the change ratio of the generated electric power before and after the operation is recorded. Secondly, for example, a state in which the azimuth angle is shifted by Δθ, The stepping motor performs an azimuth rotation operation of 0.1 degrees, and records the change ratio of the generated electric power before and after the operation. Such a record is prepared in advance to obtain background data (correction amount derivation data) at a specific angle (predicted maximum offset angle). In other words, this is to investigate the variation ratio (tilt) of the generated electric power in response to the unit rotation angle with respect to the stepping motor in accordance with the tracking offset. The shift of the tracking becomes larger, and the change ratio also becomes larger. Therefore, when the change ratio is detected, the absolute value of the offset angle is known. In the elevation direction, the background data (the data for the correction amount is extracted) is prepared in advance according to the same method.

According to the background information mentioned above (the data for the correction amount is derived), for example If the actual power generation electric power of the rotation operation with respect to the azimuth angle of 0.1 degrees is compared with the background data of the azimuth angle (the data for the correction amount is derived), it can be found that the azimuth angle is shifted by several degrees. In the same manner, when the fluctuation of the actual generated electric power with respect to the rotation operation of the elevation angle of 0.1 degrees is compared with the background data of the elevation angle (the data for correction amount is derived), it can be found that the elevation angle is shifted by several degrees. If there is no offset in the tracking, the fluctuation of the generated power will fall within a very small range. According to the method 2 for determining the correction amount, there is an advantage that it can be applied to any of the modes (b), (c), and (d).

"An example of the result of correction"

Fig. 12 shows an example of a case where the elevation angle is corrected by, for example, the state of the mode (b). The diagram on the lower side partially enlarges the diagram of the upper side. Further, similarly to FIG. 8, the position where the light collecting point SP is formed on the power generating element 122 is displayed.

Here, when the correction is performed by adding +1.0 degrees as the offset value, the elevation angle of -1.0 degrees is 0 degree. As a result, the variation pattern caused by the offset of the elevation angle is eliminated, and the generated power is increased.

"As an example of a concentrating solar power generation system"

Next, an embodiment of the concentrating solar power generation system (including the description of the tracking offset detection method or the correction method) as seen from the viewpoint of the tracking operation will be described. In addition, since the description is given to the "concentrated solar power generation system seen from the viewpoint of the tracking operation", the original output control unit (for example, the MPPT control unit and the inverter circuit unit) as the power generation system is omitted. Illustration or description of the etc.).

Fig. 13 is a view showing an example of a concentrating solar power generation system as seen from the point of the related tracking operation. In the drawing, the concentrating solar power generation device 100 is provided with a driving device 200 for performing a tracking operation of the sun, for example, on the back side. The drive device 200 includes a stepping motor 201e for driving in the elevation direction, a stepping motor 201a for driving in the azimuth direction, and a drive circuit 202 for driving these. Moreover, the stepping motor is only an example, and other power sources may be used.

In the concentrating solar power generation device 100, the tracking sensor 4 and the direct sunlight meter 5 are provided in the vicinity of the vacant space of the concentrating solar power generation panel 1 or the like. The output signal (direct sunlight intensity) of the direct sunlight meter 5 is input to the drive circuit 202 and the control device 400. Further, the generated electric power of the concentrating solar power generation panel 1 can be detected by the electric power meter 300, and the control device 400 is input with the information indicating the detected electric power. number. The drive device 200 stores the latitude and longitude of the installation place of the concentrating solar power generation panel 1, and has a clock function. The driving device 200 performs the tracking operation so that the concentrating solar power generation panel 1 always faces the sun based on the output signal of the tracking sensor 4 and the position of the sun calculated by the latitude/longitude/time. However, as described above, there is also a case where the tracking sensor 4 is not provided. In this case, the tracking operation is performed only based on the position of the sun calculated by the latitude/longitude/time.

"An example of correction processing according to software"

14 and 15 are flowcharts showing a process of detecting and correcting the tracking offset performed by the control device 400. A and B at the lower end of Fig. 14 are connected to A and B of Fig. 15, respectively. Further, the numerical values given in the following flowcharts are merely examples, and are not limited to these numerical values.

First, in Fig. 14, at the same time as the start of the process, the control device 400 accumulates the data at intervals of 5 seconds (step S1). This information is direct sunlight intensity, power generation, and time.

Next, the control device 400 determines whether or not the specific sunshine condition is satisfied (step S2). The specific sunshine condition is a condition for determining whether or not the direct sunlight intensity of the past 10 minutes is 600 W/m ² or more, and the variation is within 10%. That is, two conditions mean a calm sunny day (clear). When the specific condition is not satisfied, the processing of the control device 400 returns to the accumulation of the material (step S1), and waits for the specific condition to be satisfied.

When the condition specified in step S2 is satisfied, the control device 400 checks the fluctuation pattern of the generated power (step S3B). That is, the past Among the 10 minutes of generated electric power, is there a difference in the measured generated electric power, and even if the change in the direct sunlight intensity is normalized, it becomes a difference of 10% or more of the generated electric power (that is, it is not a normal fluctuation range). Changes in generated electricity.

If there is no such step-like change (example) For example, in the case of the mode (a) of Fig. 6, the control device 400 regards that it is not necessary to correct, and returns the processing to step S1. In addition, when the value of the generated electric power is normalized to the change in the sunshine intensity, and is 95% or more of the normal state, the process proceeds to step S1. The step (step S3A (not shown)) is also possible. Further, when the operation of step S1 is returned to the above-described one, instead of returning the process to step S1, it is possible to temporarily stop the control process, but it is always possible. It is preferable to keep the processing back to step S1 in order to keep the monitoring operation in a good state.

Then, among the generated electricity in the past 10 minutes, When there is a difference of 10% or more after the normalization of the change in the direct sunlight intensity, the difference between the power generation power that is continuously performed is changed, and when there is a stepwise fluctuation of the generated power, the cycle of the step-like fluctuation is obtained. (S_j) and the intermediate point (U_j) of the time, and further checking the directivity of the change (step S3C). That is, according to the zigzag mode of variation included in the fluctuation mode, (a) a pattern that gradually increases and decreases in the step width, and (b) a pattern that gradually decreases and increases in step width, Know the sign of the angle that should be corrected.

For example, in the power generation of the past 10 minutes, the difference between the power generation power that has been continuously generated is measured, and the stepwise variation of the power generation power at the point where the change in the direct sunlight intensity is normalized is still 10% or more. For dP1, dP2, ..., dPn, the time after the corresponding step change is T _1A , T _1B , T _2A , T _2B , ..., T _nA , T _na . Here, m is an arbitrary integer of 1 to (n-1), and the difference between these occurrence times is Sm=T _(m+1)A -T _mA . Further, the intermediate point of the time is Um = (T _{(m + 1) A} + T _mA ) / 2. Next, the intermediate point (U_j) of the representative occurrence period (S_j) and the time may be selected from among the sets of Sm and Um. The method for selecting m may be any one of (1) m at the time of maximum dPm, (2) m of the closest Um, and (3) dPm at a central value of the distribution thereof, and any of them. To reduce the load of the calculation process and reduce the cost of the circuit, (2) is preferred. Next, the directionality of the fluctuation is further determined by the magnitude relationship between the generated electric powers of T _mA and T _mB .

Here, as in the pattern (d) of FIG. 6, the azimuth is mixed. In the case of offset and elevation offset, two kinds of dPm groups appear, and the initial S_j and U_j of each offset can also be respectively. As a method of processing by a soft body, the following methods are mentioned, for example. However, this is only an example, and the numerical value is only an example. For example, between a certain period of time, the difference between the power generation and the power generation that is continuously measured is found to have a difference of 10% or more of the generated power, and each of the difference components is within ±10%. These periodically occurring dPm groups are replaced by sentences. In other words, a dPm set of similar values is sought, and the period Sm corresponding to the time Tm of these dPm is read. In addition, the intermediate point Um of the corresponding time is read. Furthermore, the directivity of the change is also determined. In this way, for example, The directionality of the fluctuation can also be known from the period S_j of the fluctuation of the azimuth angle and the intermediate point U_j of the time.

When there are two types of such dPm groups (that is, with the aforementioned dPm When the group is different from the other group having a variation width of 20% or more, the same processing is performed for the second type, that is, for example, due to the fluctuation of the elevation angle. Next, it is determined that this is a mixed mode as in the mode (d). Suppose there are three types, for the third one, either no processing, or return to the starting point of processing. When there are two types of dPm groups and two types of S_j and U_j corresponding to each other are obtained, and the directionality of the change is selected, one of the types is selected, and the angle offset of the single side is first corrected to proceed to the next step.

Next, the control device 400, in the next step S4, At the intermediate point U_j at the time, the latitude/longitude and the time U_j of the installation place of the concentrating solar power generation panel 1 and the drive device 200 are respectively calculated such that the azimuth direction corresponds to the minimum movement angle according to the stepping motor 201a. The amount S_A at which the sun moves in the azimuth direction at this time, and the elevation direction correspond to the amount of time S_E at which the sun moves in the elevation direction according to the amount of the minimum movement angle of the stepping motor 201e.

Moreover, these times are also detected by the tracking sensor.

Next, the control device 400 determines whether or not the relationship between the following 1) and 2) is satisfied (step S5).

1)|(S_j-S_E)/S_j |≦30%

2)|(S_j-S_A)/S_j |≦30%

The above 1) grasps the opposite of the generated power with the elevation offset. The condition of a similar state (mode (b) of Figure 6). Further, the above 2) grasps the condition of a state similar to the reaction of the generated electric power (the mode (c) of FIG. 6) when the azimuth is shifted.

Then, when only 1) is established, it can be determined that there is an elevation angle Offset. Only when 2) is established, it is possible to determine the azimuth offset. In addition, when both 1) and 2) are established (when the time zone is different, the values of S_E and S_A are close to each other), and when neither of them is satisfied, the control device 400 regards the determination as difficult or unnecessary. Correction causes the process to return to step S1.

When only the above 2) is established, the control device 400 advances In step S6 of Fig. 15, the direction of the correction is determined by whether the fluctuation in the stepwise variation of the generated electric power fluctuates in the increasing direction or in the decreasing direction. When the direction of the increase is changed, the control device 400 corrects the compensation of the azimuth angle to the positive side, and corrects the tracking offset which causes the fluctuation of the generated power (step S7). In addition, when the direction of the change is reduced, the control device 400 corrects the compensation of the azimuth angle to the negative side, and corrects the tracking offset which causes the fluctuation of the generated power (step S8).

On the other hand, when only the above 1) is satisfied, the control device 400 proceeds to step S10 of FIG. 15 and determines whether the fluctuation in the stepwise variation of the generated electric power fluctuates in the increasing direction or in the decreasing direction. When the direction of the increase is changed, the control device 400 further determines whether it is before or after the positive south time (step S11). In the case of the positive south time, the control device 400 corrects the compensation of the elevation angle to the positive side, and corrects the tracking offset which causes the fluctuation of the generated power (steps). S12). In addition, the control device 400 corrects the compensation of the elevation angle to the negative side, and corrects the tracking offset which causes the fluctuation of the generated power (step S13).

In addition, when the stepwise change of the generated electric power is performed in step S10 When the change is in the direction of decreasing direction, the control device 400 further determines whether it is before or after the positive south time (step S14). In the case of the positive south time, the control device 400 corrects the compensation of the elevation angle to the negative side, and corrects the tracking offset which causes the fluctuation of the generated power (step S15). In addition, the control device 400 corrects the compensation of the elevation angle to the positive side, and corrects the tracking offset which causes the fluctuation of the generated power (step S16). The method of deriving the correction amount may be any one of the methods described in the above-mentioned "Method for determining the amount of correction" and "Method for determining the amount of correction". Alternatively, as the correction amount, an appropriate fixed value is selected first, so that the correction program converges in a repeated state to a state in which there is no offset.

Step S7, S8, S12, S13, S15, S16 At the end of the process, the control device 400 resets the accumulated data for the past 10 minutes to complete a series of processes (step S9), and returns the process to step S1 again.

In the above description, in the case of the step S4 and the following, when only one type of S_j, U_j, and the change directivity are processed, in the case where the mixed mode is determined in step S3C, the S_j and U_j for the single side are first performed. After the processing of the directionality of the change, it is also possible to perform the processing of step S4 or lower for the other party before returning to step S1.

Thus, by performing routinely (for example, daily) as shown in FIGS. 14 and 15 In the process of using the concentrating solar power generation device 100 in a state where the tracking offset does not occur, the device 100 can obtain the maximum power available under the provided environment.

"other"

Further, in the above-described embodiment, for example, a variation pattern in which the generated electric power is changed over time in the vicinity of the time when the sun is in the south is displayed, and a pattern unique to the azimuth shift and an elevation offset are unique. Compared with the type, it is possible to detect the presence or absence of tracking offset, but the type unique to the azimuth offset and the elevation offset will change depending on the time, so if it is not in the south When the time is near the time, it is necessary to consider and correct the time.

In addition, Figure 16 shows the set seen from the point of the tracking action. A diagram of another example of a light-type solar power generation system. Different from FIG. 13, the communication device 500 is installed on the installation side of the concentrating solar power generation device 100, and the control device 400 is disposed at a remote place through a communication line such as the Internet. The communication device 500 transmits the measurement signal of the power meter 300 to the control device 400, and the control device 400 receives the correction signal sent to the drive device 200.

In this case, since the offset of the tracking can be corrected by the remote control of the communication line, it is suitable for centralized management from a distance.

Fig. 17 is a view showing still another example of the concentrating solar power generation system. The difference from Fig. 13 is that instead of the direct sunshine meter 5 (Fig. 13), the full day sunshine meter 5A is used.

For all-day sunshine, there are, for example, full-day sunshine of the horizontal plane, and full-day sunshine with the normal surface. The horizontal plane is not provided integrally with the concentrating solar power generation panel 1 but is fixedly disposed in the vicinity of the concentrating solar power generation panel 1, for example. The sun's tracking action is not carried out in the full-day sunshine of the water level. On the other hand, the normal-day sunshine of the normal surface is measured by the full-sky light (direct light and scattered light) received on the normal plane, and follows the sun tracking operation similarly to the concentrating solar power generation panel 1. . The normal-surface sunshine is applied to the concentrating solar power generation panel 1 to perform the tracking operation, or the tracking operation is performed separately in the vicinity of the concentrating solar power generation panel 1.

Step S2 of Fig. 14 in the case of using the full day sunshine meter 5A In the case of using the normal surface full-day sunshine meter, when the normal-day sunshine intensity of the normal surface detected by the normal-day sunshine meter is a specific value or more, the specific sunshine condition is satisfied. In addition, in the case of a full-day sunshine of the horizontal plane, when the full-day sunshine intensity of the horizontal plane detected by the full-day sunshine of the horizontal plane is a specific value or more, the specific sunshine condition is satisfied. Next, the detection and correction of the tracking offset are performed only when the sunshine condition is satisfied.

All day long day sunshine or full horizontal surface The sunshine meter is less susceptible to the contamination of the window portion of the built-in sunshine sensor than the direct sunlight meter. In addition, there is less problem with the tracking offset in which the direct sunlight meter becomes an important cause of measurement error. That is to say, regarding the actual measurement of the intensity of sunlight, there is a case where more reliable information can be obtained.

Further, the control device 400 (FIGS. 13 and 16) may be a computer or a soft body, or may be a hard body.

As a program for realizing functions by a computer, the present invention is simply a program for use in a concentrating solar power generation system, which (i) detects a concentrating solar power generation panel. A variation pattern in which the generated power changes over time is detected by comparing the detected fluctuation pattern with the characteristic pattern of the unique pattern and the elevation angle appearing in the azimuth shift, and detecting whether there is tracking. The function of the offset, and (ii) the axis that produces the offset in the two axes of the azimuth and elevation when there is a tracking offset, and the function of indicating the correction of the angle of the specific axis to the driving device, A program that is implemented by a computer.

The above (i) is the detection process of tracking offset by computer In the case of computers (i) and (ii), it is a correction program for tracking offset. Since the necessary functions are programmed, the concentrating solar power generation system is easy to manufacture, and it is easy to add functions to the existing concentrating solar power generation system, and the system upgrade is also easy.

Similarly, the control device in the case of a hard body 400 is a control device 400 that is equipped with at least the aforementioned functions (i) or (i) and (ii). In this case, part or all of the control device 400 may be a semiconductor integrated circuit, for example, a single wafer IC. In this case, since the necessary functions are mounted on the single wafer IC, the concentrating solar power generation system can be easily manufactured. Further, the semiconductor integrated circuit can be manufactured at low cost.

Figure 18 is a view showing another example of the concentrating solar power generation system. Picture. The difference from Fig. 13 is that the control device 400 utilizes a commercially available computer. In this case, the function of the control device 400 is provided by a program recorded on a computer-readable recording medium (memory medium) 501, and is installed in a computer, that is, the control device 400. Thereby, the control device 400 can exert the necessary functions. As the recording medium, for example, a compact disc, a magnetic disk, a compact memory, or the like is suitably used. The program is recorded on the recording medium 501, and can be recorded in the form of the medium 501 for distribution.

Alternatively, the program may be downloaded via the communication line 502 such as the Internet or the use type of the server 503 using the ASP (Application Service Provider) program.

Fig. 19 is a view showing still another example of the concentrating solar power generation system. The difference from Fig. 16 is that the control device 400 utilizes a commercially available computer. In this case, the function of the control device 400 is provided by a program recorded on a computer-readable recording medium (memory medium) 501, and is installed in a computer, that is, the control device 400. Thereby, the control device 400 can exert the necessary functions. As the recording medium, for example, a compact disc, a magnetic disk, a compact memory, or the like is suitably used.

Further, the control devices 400 of Figs. 13, 16, 18, and 19 may be combined with each other (for use).

Further, similarly to Fig. 17 and Figs. 18 and 19, the full day sunshine meter can be used instead of the direct sunlight meter.

Moreover, all the gist of the embodiments disclosed herein are illustrative and should not be construed as limiting. The scope of the present invention is intended to include the meaning of the scope of the claims and the meaning of the claims All changes within this range.

1‧‧‧Light collecting solar power panel

4‧‧‧ tracking sensor

5‧‧‧Direct sunshine meter

100‧‧‧Light collecting solar power generation device

200‧‧‧ drive

201a‧‧‧stepper motor

201e‧‧‧stepper motor

202‧‧‧ drive circuit

300‧‧‧Power Meter

400‧‧‧Control device

Claims (17)

A concentrating solar power generation system, comprising: a concentrating solar power generation panel, a driving device for causing the concentrating solar power generation panel to perform a tracking operation on the sun, and detecting the concentrating solar power The variation pattern of the generated power of the photovoltaic power generation panel over time changes, and the presence or absence of the unique pattern and the elevation offset characteristic appearing by the detected variation pattern and the azimuth deviation are detected. Tracking offset control device. The concentrating solar power generation system according to claim 1, wherein the control device specifies an axis of the offset in the two axes of the azimuth and elevation when the tracking offset is present, The drive unit indicates the correction of the angle of the particular axis. The concentrating solar power generation system according to claim 2, wherein the control device has a pattern in which the zigzag variation pattern included in the variation pattern is (a) gradually increasing and decreasing in step width, and (b) Any of the modes that are slowly reduced and increased when the stride changes, to determine the sign of the angle to be corrected. The concentrating solar power generation system according to claim 2, wherein the control device determines the angle to be corrected based on the power generated by the power generated by the power generation in the case where there is no offset beforehand. The absolute value. Such as the concentrating solar power generation of the second or third patent application scope In the system, the control device determines an absolute value of an angle to be corrected based on a change ratio of the generated electric power to the tracking operation. The concentrating solar power generation system according to any one of claims 2 to 5, wherein the concentrating solar power generation panel has a direct sunlight meter, and the control device is only directly detected by the direct sunlight meter When the sunshine intensity is equal to or greater than a specific value, the above correction is performed. The concentrating solar power generation system according to any one of claims 2 to 6, wherein the control device performs the correction in a time zone in which the sun moves to the south. For example, the concentrating solar power generation system of any one of the patent scopes 2 to 5, wherein the full-day sunshine meter is provided with a normal-day full-day sunshine meter or a full-day sunshine of the horizontal plane, and a normal-day sunshine of the normal surface. In the case of the meter, only when the normal-day sunshine intensity of the normal surface detected by the full-day sunshine of the normal surface is a specific value or more, and when the horizontal plane is full-day sunshine, only the full-day sunshine of the horizontal plane is detected. The above correction is performed only when the full-day sunshine intensity of the horizontal plane is greater than or equal to a specific value. The concentrating solar power generation system according to any one of claims 2 to 8, wherein the measurement signal of the power meter for transmitting and measuring the generated electric power and the communication of the correction signal sent to the driving device are simultaneously received. The control device is disposed at a place away from the concentrating solar power generation panel and the driving device, and communicates with the communication line The communication device performs communication to perform the reception of the aforementioned measurement signal and the transmission of the aforementioned correction signal. A method for detecting a tracking offset is a method for detecting a tracking offset of a concentrating solar power generation device that drives a concentrating solar power generation panel to follow a tracking operation of the sun, and is characterized in that: A variation pattern included in the time-dependent change of the generated electric power of the concentrating solar power generation panel is detected, and the unique pattern and the elevation offset appearing by the deviation of the azimuth angle by comparing the detected fluctuation pattern are detected. Type, and detect if there is a tracking offset. A method of correcting a tracking offset is a concentrating solar power generation device including a driving device that causes a concentrating solar power generation panel to follow a tracking operation of the sun, and the concentrating solar power generation panel A method of correcting a tracking offset performed by detecting a generated electric power and a control device for controlling the driving device, wherein the detected power generation power of the concentrating solar power generation panel is detected as a function of time In the variation mode, by comparing the detected variation pattern with the unique pattern of the unique pattern and the elevation offset appearing in the azimuth offset, it is detected whether there is a tracking offset or an offset. The axis of the offset in the two axes of the azimuth and elevation is specified, and the drive device is instructed to correct the angle of the specified axis. For example, the correction of the tracking offset in item 11 of the patent application scope In the method of measuring the change over time of the generated electric power in a state in which one of the azimuth and the elevation angle is fixed in advance, the angle of the other side of the generated electric power reduced corresponding to the generated electric power in the case where there is no offset is first investigated. Offset. A control device for a concentrating solar power generation system including a concentrating solar power generation panel and a driving device that performs a tracking operation on the sun by the concentrating solar power generation panel, The characteristic is that a variation pattern in which the generated power of the concentrating solar power generation panel is detected to change over time is detected, and the characteristic pattern and the elevation angle appearing by comparing the detected fluctuation pattern and the azimuth deviation are mounted. The unique type of offset is detected as to whether there is a tracking offset function. The control device according to claim 13 is characterized in that, in the case where the tracking offset is present, an axis which generates an offset in two axes of azimuth and elevation is specified, and a specific axis is indicated to the driving device. The function of correcting the angle. The control device of claim 13 or 14, wherein the aforementioned function is realized by a semiconductor integrated circuit. A tracking offset detection program for a concentrating solar power generation system including a concentrating solar power generation panel and a driving device for causing the concentrating solar power generation panel to perform a tracking operation on the sun, The utility model is characterized in that: by means of a computer, a variation pattern detected by the power generation power of the concentrating solar photovoltaic power generation panel is detected by time, and the detection mode is compared. The characteristic pattern of the variation pattern and the azimuth offset appearing in the unique pattern and the elevation angle offset, and whether the tracking offset function is detected. A correction program for tracking offset, which is used in a concentrating solar power generation system including a concentrating solar power generation panel and a driving device that performs a tracking operation on the sun by the concentrating solar power generation panel, The invention is characterized in that the computer realizes: detecting a variation pattern of the generated power of the concentrating solar power generation panel over time, and comparing the detected variation pattern and the azimuth deviation to the unique type a characteristic type of state and elevation offset, and detecting whether there is a function of tracking offset, and in the case of the aforementioned tracking offset, the axis of the offset in the two axes of the azimuth and elevation is specified. The function of correcting the angle of the specific axis to the aforementioned driving device.