JP7011881B2 - Hybrid power generation system and power control device - Google Patents

Description

The present invention relates to a renewable energy hybrid power generation system including a plurality of renewable energy power generation devices and a renewable energy hybrid power generation control device.

In recent years, the introduction of renewable energy power generation systems such as solar power generation and wind power generation has been promoted in consideration of environmental problems, but new problems have arisen with the promotion of introduction.

As an example of this, since a large amount of renewable energy power generation has been introduced into the electric power system, there is a problem that the interconnection capacity frame is insufficient and new power generation equipment cannot be connected to the electric power system. For example, if you want to install a new renewable energy power generation facility at a renewable energy power generation site, the interconnection capacity frame when connecting the power generation site to the power system will be exceeded, and a new power generation facility will be added. The problem is that it cannot be installed.

In addition, the output power of renewable energy power generation fluctuates greatly depending on the weather. For example, in the case of solar power generation, since it cannot generate power at night or in bad weather, the secured interconnection capacity cannot be used up, and the capacity factor of the solar power generation equipment is high. There is also the issue of lowering. Here, the capacity factor is the ratio of the actual power generation amount to the power amount obtained when the power generation equipment continues to operate at 100% with the interconnection capacity.

In order to solve these problems, conventionally, a technique has been proposed in which a photovoltaic power generation facility is combined with a wind power generation facility and connected to the same interconnection point to complement each other's power generation efficiency. As this conventional technique, for example, Patent Document 1 discloses a technique capable of improving the capacity factor without exceeding the interconnection capacity with respect to a commercial power system.

In Patent Document 1, "a first power generation facility that generates power from a first energy source, a second power generation facility that generates power from a second energy source, and the second power generation facility output output. A second power generation facility control device that controls the generated power, and a control that supplies the total power of the generated power output by the first power generation facility and the generated power output by the second power generation facility to the commercial power system. The hybrid power generation control device comprises a hybrid power generation control device for predicting the power generation of the first power generation facility, and a power generation prediction means for predicting the power generation of the first power generation facility, and an upper limit set in advance for the commercial power system. Based on the power value obtained by subtracting the predicted value of the power generation of the first power generation facility predicted by the power generation power prediction means from the interconnection capacity which is the power of the second power generation facility, the constraint value of the power generation of the second power generation facility is set. A hybrid power generation system characterized by having a constraint value setting means for calculating and setting the calculated constraint value in the second power generation facility control device. "

Patent No. 6108510

When adding a wind power generation facility to an existing solar power generation facility to improve the facility utilization rate, the interconnection capacity is determined by the rated output (contract power) of the solar power generation facility, so the photovoltaic power generation facility and wind power generation The combined output of the equipment shall not exceed the interconnection capacity. Therefore, it is necessary to control the added wind power generation equipment so that the combined output does not exceed the interconnection capacity. , The interconnection capacity may be exceeded. In addition, if an excessive margin is provided so as not to exceed the interconnection capacity, the capacity factor of the wind power generation facility will decrease.

An object of the present invention is to provide a hybrid power generation system and a power control device that ensure the capacity factor of wind power generation equipment without exceeding the interconnection capacity.

In order to solve such a problem, the hybrid power generation system of the present invention includes a photovoltaic power generation facility, a wind power generation facility, and a power control device, and the power control device has an interconnection capacity and a photovoltaic power generation output in fine weather. The possible amount of wind power generation in fine weather is calculated, which is the difference between Is calculated, and the upper limit value of the wind power generation facility is calculated based on the sum of the wind power generation possible amount in fine weather and the wind power generation possible amount.

Further, in order to solve such a problem, the power control device of the present invention is a power control device that controls a photovoltaic power generation facility and a wind power generation facility, and has an interconnection capacity and a photovoltaic power generation output in fine weather. Calculate the possible amount of wind power generation in fine weather, which is the difference between However, it is characterized in that the upper limit value of the wind power generation facility is calculated based on the sum of the wind power generation possible amount in fine weather and the wind power generation possible amount.

According to the present invention, the capacity factor of the wind power generation facility can be improved without the combined output of the photovoltaic power generation facility and the wind power generation facility exceeding the interconnection capacity. Furthermore, new power generation equipment can be introduced in areas where there is no grid interconnection frame already.

The block diagram which shows the example of the whole structure of the hybrid power generation system in Example 1. FIG. The figure which shows the detailed example of the hybrid controller in Example 1. FIG. The figure which shows the image of the wind power generation upper limit value in Example 1. FIG. The figure which shows the example of the power generation area of a wind power generator. The block diagram which shows the example of the margin calculation part in Example 1. FIG. In the first embodiment, the flowchart which shows the example of the arithmetic processing of the margin arithmetic unit. The block diagram which shows the example of the interconnection capacity deviation determination part in Example 1. FIG. In the first embodiment, the flowchart which shows the example of the arithmetic operation of the interconnection capacity deviation determination unit. The block diagram which shows the example of the wind power generation upper limit value calculation part in Example 1. FIG. The block diagram which shows the example of the whole structure of the hybrid power generation system in Example 2. Example 2 The figure which shows the detailed example of the hybrid controller. The block diagram which shows the example of the wind power generation upper limit value calculation part in Example 2. The block diagram which shows the example of the whole structure of the hybrid power generation system in Example 3. FIG. The block diagram which shows the example of the wind power generation upper limit value calculation part in Example 3.

Hereinafter, embodiments will be described with reference to the drawings. In all the drawings for explaining the embodiments, those having the same function are designated by the same reference numerals, and the repeated description thereof may be omitted.

Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 is a block diagram showing an example of the overall configuration of the hybrid power generation system according to the first embodiment. The photovoltaic wind hybrid power generation system 100 is connected to the power system 1. The photovoltaic power generation system 100 includes a photovoltaic power generation device 2, a wind power generation device 6, and a power control device 11. The sum of the photovoltaic power generation power Ppv output from the photovoltaic power generation facility 2 and the wind power generation power Pwt output from the wind power generation facility 6 is supplied to the power system 1 as the system power Psys. Here, the upper limit of the system power Psys is the interconnection capacity PL.

The photovoltaic power generation facility 2 includes a solar panel 3 and a solar power conditioner 4 (hereinafter referred to as “solar PCS 4”). The solar panel 3 can be configured by, for example, connecting a plurality of silicon-based solar cells such as a single crystal silicon type, a polycrystalline silicon type, a microcrystalline silicon type, and an amorphous silicon type in series and parallel. Further, the solar panel 3 may be configured by connecting a plurality of compound-based solar cells such as InGaAs-based, GaAs-based, and CIS-based (calcovalite-based) in series and parallel. Further, in the present embodiment, as the solar cell constituting the solar panel 3, for example, an organic solar cell such as a dye-sensitized solar cell or an organic thin-film solar cell may be used. Further, the photovoltaic PCS 4 converts the DC power generated from the solar panel 3 into AC photovoltaic power Ppv and outputs it to the power system 1. Therefore, the photovoltaic power generation power Ppv supplied to the power grid 1 is limited by the rated output of the photovoltaic PCS 4.

The wind power generation facility 6 is composed of a wind turbine 7 and a power conditioner 8 for a wind turbine (hereinafter referred to as “PCS 8 for a wind turbine”). It has a function to control the power generation output by the wind turbine PCS8 (PCS control) and a function to control the power generation output by the angle control of the blades of the wind turbine (pitch angle control). Until the generated power of the wind turbine 7 reaches the rated output, the wind turbine is rotated only by the force of the wind to generate electricity, and when the rated output is reached, the pitch angle is controlled to keep the rotation speed constant. In addition, the amount of power that can be generated is calculated from the rotation speed of the generator and given to the PCS8 for the wind turbine. Here, the PCS8 for a wind turbine may be installed under the tower of the wind turbine. The wind power generation power Pwt output from the wind power generation facility 6 is supplied to the power system 1.

The power control device 11 has a function for controlling the power so as to improve the capacity factor while suppressing the system power Psys output from the photovoltaic wind power hybrid power generation system 100 to the interconnection capacity PL or less, and is a hybrid. It includes a controller 12, a wind turbine controller 13, a communication network 14 (Internet, etc.), an external controller 15, and a terminal 16. In the power control device 11, the hybrid controller 12 is communicably connected to the external controller 15 via the communication network 14, and the external controller 15 is connected to the terminal 16 via a serial bus, a parallel bus, or the like.

In the power control device 11 having such a configuration, the operator can control the processing operation of the hybrid controller 12 via the external controller 15 installed at a place away from the photovoltaic wind power hybrid power generation system 100. For example, by operating the terminal 16, the operator can access the hybrid controller 12 via the external controller 15 and input various setting values required for various controls. Further, for example, the operator can display the state (operating state) of the photovoltaic wind power hybrid power generation system 100 on the terminal 16. In the present embodiment, a configuration example in which the power control device 11 includes the communication network 14, the external controller 15, and the terminal 16 will be described, but the present embodiment is not limited to this, and these configurations are the power control device. It may be provided outside the eleventh.

The hybrid controller 12 is composed of, for example, an arithmetic unit such as a CPU (Central Processing Unit). The hybrid controller 12 is connected to the solar PCS4 and the wind turbine PCS8 via a communication network. In this case, the communication connection mode can be arbitrarily set, and for example, any mode of wireless communication and wired communication can be applied. Although the details will be described later, the hybrid controller 12 acquires the photovoltaic power generation power Ppv measured by the power meter 5. The photovoltaic power generation power Ppv may be measured by the solar PCS4. The same applies to the wind power generation facility 6, and the wind power generation power Pwt measured by the power meter 9 is acquired. The wind power generation power Pwt may also be measured by the wind turbine PCS8 in the same manner as the solar power generation power Ppv. Further, the operation of acquiring these various signals (various information) by the hybrid controller 12 may be performed periodically or irregularly.

Further, the hybrid controller 12 determines the risk that the system power Psys, which is a combined output of the measured photovoltaic power generation power Ppv and the measured wind power generation power Pwt, exceeds the interconnection capacity PL. Performs various operations so as not to exceed the interconnection capacity PL. FIG. 1 shows a case where the solar power generation device 2 and the wind power generation device 6 are installed independently, but the present invention is not limited to this. For example, in a large-scale photovoltaic power generation device 2 such as a mega solar equipped with a large number of solar panels 3, a plurality of solar PCS 4s are installed according to the plurality of solar panels 3. Similarly, a large-scale wind power generation device 6 such as a wind farm equipped with a large number of wind turbines 7 may be used.

The wind turbine controller 13 has a role of distributing the wind power generation upper limit value Pwt_max calculated by the hybrid controller 12 to each wind turbine. The method of distributing the upper limit value of wind power generation Pwt_max may be evenly distributed to each wind power generation device 6, or the ratio may be changed according to the wind condition of each wind power generation device 6.

A specific calculation method will be described with reference to FIG. FIG. 2 shows a diagram showing a detailed example of the hybrid controller 12. The hybrid controller 12 includes a storage 121, a photovoltaic power generation waveform creation unit 122 in fine weather, a margin calculation unit 123, an interconnection capacity deviation determination unit 124, a wind power generation upper limit value calculation unit 125, and a data storage unit 126. The interconnection capacity PL, the response speed Spv of the photovoltaic power generation device 2, and the response speed Swt of the wind power generation device 6 are stored in the storage 121.

The wind power generation upper limit calculation unit 125 uses these information stored in the storage 121, the solar power generation power Ppv measured from the power meter 5, the wind power generation power Pwt measured from the power meter 9, and the power meter 10. Using the measured system power Psys, the wind power generation upper limit value Pwt_max of the wind power generation device 6 is calculated.

The solar power generation waveform creation unit 122 in fine weather creates the photovoltaic power generation power Ppv_f in fine weather. The photovoltaic power generation power Ppv_f in fine weather may be calculated in advance and implemented by a map or a mathematical formula. Here, if the photovoltaic power generation power Ppv_f in fine weather is implemented by a mathematical formula, there is an advantage that the memory capacity of the controller can be reduced. On the other hand, implementing with a map has the advantages that the algorithm implemented in the controller can be simplified and that it can be easily changed when the algorithm is updated. The photovoltaic power generation output Ppv_f in fine weather is created by utilizing past power generation history data and a database that is open to the public, or by converting the theoretical solar radiation amount calculated from the theoretical formula of the solar radiation amount into the power generation amount. Various methods can be considered, such as. The margin calculation unit 123 uses the response speed Spv of the photovoltaic power generation device 2 and the response speed Swt of the wind power generation device 6 to interconnect the system power Psys, which is the combined output of the photovoltaic power generation device 2 and the wind power generation device 6. The margin provided in the upper limit value of wind power generation Pwt_max, which is a command value for suppressing the wind power generation power Pwt of the wind power generation device 6 so as not to exceed the capacity PL, is calculated. Here, the reason for providing the margin is that the response speeds of the photovoltaic power generation device 2 and the wind power generation device 6 are different, so that the output suppression of the wind power generation power Pwt cannot be made in time, and the system power Psys deviates from the interconnection capacity PL. This is to prevent it from happening. Further, the interconnection capacity deviation determination unit 124 monitors the system power Psys and outputs a coefficient Pfb for correcting the wind power generation upper limit value Pwt_max when the system power Psys exceeds the interconnection capacity PL. Details of the margin calculation unit 123 and the interconnection capacity deviation determination unit 124 will be described later. The wind power generation upper limit calculation unit 125 is the photovoltaic power generation power Ppv measured by the power meter 5, the interconnection capacity PL which is the storage information of the storage, and the solar power generation waveform creation unit 122 in the clear sky. Using the photovoltaic power generation power Ppv_f, the margin coefficient m calculated by the margin calculation unit 123, and the correction coefficient Pfb calculated by the interconnection capacity deviation determination unit 124, the wind power generation upper limit value Pwt_max is calculated and transmitted to the wind turbine controller 13. Further, the data storage unit 126 can store all the parameters in the hybrid controller and feed them back to the control.

FIG. 3 shows an image diagram of calculating the upper limit of wind power generation Pwt_max. The region where the wind power generation device 6 can generate power is (PL-Ppv), but when the response speed of the wind power generation device 6 is slower than the response speed of the solar power generation device 2, the photovoltaic power generation power Ppv increases sharply. , The output suppression of the wind power generation device 6 is not in time, and the system power Psys exceeds the interconnection capacity PL. Therefore, by setting a margin in the wind power generation upper limit value Pwt_max, it is possible to prevent the interconnection capacity PL from being exceeded. However, if a margin is set in (PL-Ppv), the margin near sunrise or sunset, which has a low risk of the system power Psys exceeding the interconnection capacity PL, becomes excessive, and the capacity factor of the wind power generation device 6 decreases. Inviting, the amount of electricity sold will decrease. Therefore, since the photovoltaic power generation power Ppv of the photovoltaic power generation device 2 theoretically does not exceed the photovoltaic power generation power Ppv_f in fine weather, the interconnection capacity PL that does not fluctuate regardless of the weather and the photovoltaic power generation power in fine weather. The difference in Ppv_f (PL-Ppv_f) is the difference between the photovoltaic power generation power Ppv_f in fine weather and the photovoltaic power generation power Ppv of the photovoltaic power generation device 2 (Ppv_f-Ppv), which generates power by wind power without a margin and may fluctuate depending on the weather. ) Provides a margin to generate solar power. As a result, it is possible to prevent the system power Psys from exceeding the interconnection capacity PL and secure the capacity factor of the wind power generation device 6. That is, the wind power generation upper limit value Pwt_max is calculated by the equation (1).
Pwt_max = (PL-Ppv_f) + (Ppv_f-Ppv) × m
= Pwt_max1 + Pwt_max2 (1)

The shaded area in (a) of FIG. 4 is a diagram showing an example of the power generation possible area of the wind power generation device 6 calculated by the equation (1), and the shaded area in (b) of FIG. 4 is considered to be general. It is a figure which shows the example of the power generation possible area of the wind power generation apparatus 6 when the margin is provided in (PL-Ppv). FIG. 4A provides a margin ((Ppv_f-Ppv) × (1-m)) only for (Ppv_f-Ppv). Compared to FIG. 4B, the margin near sunrise and sunset is smaller and the amount of electricity sold is larger, so that the capacity factor of the wind power generation device 6 can be secured without exceeding the interconnection capacity.

On the other hand, FIG. 4B provides a certain ratio of margin (that is, (PL-Ppv) × (1-m)) with respect to PL-Ppv, which causes a decrease in the capacity factor of the wind power generation device 6.

That is, since PL> Ppv_f, (PL-Ppv) × (1-m)> (Ppv_f-Ppv) × (1-m), and FIG. 4 (b) has a larger margin than FIG. 4 (a). , The capacity factor of the wind power generation device 6 is lowered.

FIG. 5 is a block diagram showing an example of a margin calculation unit. The margin coefficient m is calculated using the photovoltaic power generation power Ppv, the response speed Spv of the photovoltaic power generation device 2, and the response speed Swt of the wind power generation device 6.

FIG. 6 is a flowchart showing an example of arithmetic processing of the margin calculation unit. Since it is only necessary to provide a margin during power generation by the photovoltaic power generation device 2, it is necessary to detect that power generation is in progress. While the photovoltaic power generation device 2 is not generating power, the wind power generation upper limit value and the interconnection capacity PL match (Pwt_max = PL), and the wind power generation upper limit value Pwt_max at this time does not change, so the margin is Not needed. Therefore, when the photovoltaic power generation power Ppv> 0 continues for a certain period of time (S11), it is determined that the photovoltaic power generation device 2 is generating power, and the calculation is performed with the margin coefficient m = Swt / Spv (S12). By setting m = Swt / Spv, even if the photovoltaic power generation device 2 continuously fluctuates at the response speed Spv, the wind power generation device 6 is always controlled so that the system power Psys does not exceed the interconnection capacity PL. Can be done. On the other hand, when Ppv ≦ 0, it is determined that the photovoltaic power generation device 2 is not generating power, and the margin coefficient m = 1 is set (S13). This time, as an example of the margin calculation method, (Ppv_f-Ppv) × m is set, but for example, the margin M may be set to M = (Spv-Swt), and the wind power generation upper limit value Pwt_max may be set to (Ppv_f-Ppv) -M.

FIG. 7 is a block diagram showing an example of the interconnection capacity deviation determination unit 124. The interconnection capacity deviation determination unit 124 includes an interconnection capacity deviation detection unit 1241 and a wind turbine upper limit correction amount calculation unit 1242. When the system power Psys and the interconnection capacity PL are compared by the interconnection capacity deviation detection unit 1241 and it is determined that the interconnection capacity deviation is deviated, the correction coefficient Pfb is calculated by the wind turbine upper limit correction amount calculation unit 1242. On the other hand, when it is determined that the deviation does not occur, Pfb = 0.

FIG. 8 is a flowchart showing an example of arithmetic processing of the interconnection capacity deviation determination unit. First, the magnitude relationship between the system power Psys and the interconnection capacity PL is compared (S21). When Psys> PL, the correction coefficient for correcting the wind power generation upper limit value Pwt_max is set to Pfb> 0 so as not to exceed the interconnection capacity PL any more. Here, Pfb is an excess portion (Pfb = | PL-Psys |) of the system power Psys with respect to the interconnection capacity PL. On the other hand, when Psys ≦ PL, the system power Psys does not exceed the interconnection capacity PL, so the correction coefficient Pfb = 0. As a result, once the system power Psys deviates from the interconnection capacity PL, the margin is increased, and it is possible to prevent the system power Psys from deviating again.

FIG. 9 is a block diagram showing an example of the wind power generation output upper limit value calculation unit 125. The difference between the interconnection capacity PL and the photovoltaic power generation power Ppv_max in fine weather is taken and set to Pwt_max1 (Pwt_max1 = PL-Ppv_f). Further, the difference between the photovoltaic power generation power Ppv_f and the photovoltaic power generation power Ppv in fine weather is taken and multiplied by the margin coefficient m to be Pwt_max2 (Pwt_max2 = Ppv_f-Ppv) × m). The sum of Pwt_max1 and Pwt_max2 is corrected by the correction coefficient Pfb (Pwt_max = Pwt_max1-Pwr_max2-Pfb), and the upper limit value of wind power generation Pwt_max is calculated. As a result, the system power Psys does not exceed the interconnection capacity PL, and the capacity factor of the wind power generation device 6 can be improved.

FIG. 10 is a block diagram showing an example of the overall configuration of the hybrid power generation system according to the second embodiment. FIG. 10 has a configuration in which a power storage device 17 is added to FIG. 1. The power storage device 17 is composed of a storage battery power conditioner 18 (hereinafter referred to as “storage battery PCS 18”) and a storage battery 19. The DC charge / discharge power output from the storage battery 19 is converted into AC charge / discharge power Pbat by the storage battery PCS18 and output to the power system 1. The storage battery PCS18, the above-mentioned solar PCS4, and the wind turbine PCS8 may be referred to as a grid interconnection inverter. The storage battery 19 is composed of a secondary battery such as a lead storage battery, a lithium ion storage battery, and a nickel / hydrogen storage battery. The hybrid controller 12 receives the charge rate SOC of the storage battery 19 from the power storage device 17 in addition to the information from the solar power generation device 2 and the wind power generation device 6, and transmits the charge / discharge power command value Pbat * to the storage battery PCS 18. Here, the power storage device 17 shows the storage battery 19 as an example, but since a device capable of storing energy such as pumped storage power generation, a fuel cell, and hydrogen can be used as a substitute, the power storage device 17 is not limited to the power storage device 17. When the system power Psys, which is the combined output of the photovoltaic power generation device 2 and the wind power generation device 6, exceeds the interconnection capacity PL, the power storage device 17 is charged instead of suppressing the output of the wind power generation device 6, and the free time By discharging to the power system 1, the equipment utilization rate of the wind power generation device 6 can be improved.

FIG. 11 is a diagram showing a detailed example of the hybrid controller 12 in the second embodiment. The difference from FIG. 2 is that SOC is added to the input of the hybrid controller 12. The SOC of the storage battery 19 is monitored, the power of the wind power generation device 6 surplus is charged to the power storage device 17 until the SOC reaches the upper limit value, and when the SOC reaches the upper limit value, the power of the wind power generation device 6 is suppressed. Here, it may be the solar power generation device 2 that suppresses the generated power, and the power generation device having a high unit selling price is preferentially generated. As a result, the maximum amount of wind power generation power Pwt can be sold. Further, if the power generation device having a low maintenance cost is preferentially generated, the wear of the power generation device having a high maintenance cost can be suppressed and the maintenance cost can be reduced. That is, by preferentially generating power from the photovoltaic power generation device 2 having a low maintenance cost, it is possible to suppress the wear of the wind power generation device 6 having a high maintenance cost, so that the maintenance cost of the wind power generation device 6 can be reduced. It can contribute to the improvement of the capacity factor of 6.

FIG. 12 is a block diagram showing an example of the wind power generation upper limit value calculation unit 127 in the second embodiment. FIG. 12 has a configuration in which a charge / discharge power calculation unit 1271 is added to FIG. First, the upper limit of wind power generation is Pwt_max = PL. Since the power generation area of the wind power generation device 6 is (PL-Ppv_f), the power storage device 17 is charged when the wind power generation output Pwt exceeds (PL-Ppv_f). That is, the charge / discharge command Pbat * = Pwt− (PL-Ppv_f) of the power storage device 17. As a result, the risk of exceeding the storage battery capacity PL can be reduced. Here, when the response speed of the power storage device 17 is about the same as the response speed of the photovoltaic power generation device 2, the margin coefficient m may be 1 (the margin may not be provided). Further, when the interconnection capacity deviation determination unit 124 detects the deviation of the system power Psys, the charge / discharge power Pbat is calculated in consideration of the correction coefficient Pfb so that the deviation does not occur any more. Here, the correction coefficient Pfb is obtained by the same method as in the first embodiment. Therefore, the charge / discharge power command value Pbat * is calculated by Pbat * = min (Pwt- (PL-Ppv_f), (Ppv_f-Ppv) × m-Pfb). As described above, the photovoltaic power generation system 101 with a storage battery improves the capacity factor of the wind power generation device 6 without exceeding the interconnection capacity PL of the power system.

FIG. 13 is a block diagram showing an example of the overall configuration of the hybrid power generation system according to the third embodiment. FIG. 13 has a configuration in which an anemometer 20 is added to FIG. By using the wind speed Vwt measured from the anemometer 20, it is possible to estimate the maximum possible power Pwt_e, which is the power before the suppression of the wind power generation device 6. Therefore, only when the system power Psys exceeds the interconnection capacity PL unless the power generation of the wind power generation device 6 is prioritized and the maximum possible power Pwt_e is output and the wind power generation power Pwt of the wind power generation device 6 is suppressed. By charging the power storage device 17, the equipment utilization rate of the wind power generation device 6 can be improved.

FIG. 14 is a block diagram showing an example of the wind power generation upper limit value calculation unit 127 in the third embodiment. In FIG. 14, as compared with FIG. 12, the wind speed Vwt is added to the input value, and the possible maximum output estimation unit 1272 for calculating the possible maximum power Pwt_e of the wind power generation device 6 and the system power Psys once deviate from the interconnection capacity PL. A correction unit 1251 for correcting the upper limit value of wind power generation Pwt_max is added in order to prevent the deviation from occurring again later. When the electric power charged in the power storage device 17 is discharged, the electric power is reduced due to the charge / discharge loss. Therefore, the maximum utilization of the wind power generation device 6 leads to the improvement of the capacity factor. Therefore, the upper limit of wind power generation is set to Pwt_max = PL. Since the power generation area of the wind power generation device 6 is (Pwt_max1 + Pwt_max2), the power storage device 17 is charged when the maximum possible power Pwt_e of the wind power generation device 6 exceeds (Pwt_max1 + Pwt_max2). Further, when the SOC of the power storage device 17 is in a fully charged state, the power storage device 17 cannot be charged, so that the power generation output of the wind power generation device 6 is suppressed by (Pwt_e-Pwt_max). As described above, the solar wind power hybrid power generation system 102 with a storage battery with a wind speed meter maximizes the wind power generation device 6 by calculating the maximum possible power Pwt_e of the wind power generation device 6 based on the wind speed Vwt measured from the wind speed meter 20. By charging the power storage device 17 only when the power generation is limited and the wind power generation Pwt must be suppressed, the equipment utilization rate is improved without exceeding the interconnection capacity PL of the power system.

Although the hybrid system of the photovoltaic power generation device 2 and the wind power generation device 6 has been described up to the third embodiment, the hybrid system is not limited to solar power and wind power, and two or more types of power generation devices may be combined.

1 Power system 2 Photovoltaic power generation device 3 Solar panel 4 Solar power conditioner (PCS)
5, 9, 10 Power meter 6 Wind power generation equipment 7 Wind turbine 8 Wind turbine power conditioner (PCS)
11 Power controller 12 Hybrid controller 13 Windmill controller 14 Network 15 External controller 16 Terminal 17 Power storage device 18 Power conditioner for storage battery (PCS)
19 Storage battery 20 Wind speed meter 100 Solar power hybrid power generation system 101 Solar wind hybrid power generation system with storage battery 102 Solar wind hybrid power generation system with storage battery with wind speed meter 121 Storage 122 Photovoltaic power generation waveform creation unit 123 Margin calculation unit 124 stations System capacity deviation determination unit 125 Wind power generation upper limit calculation unit 126 Data storage unit 127 Wind power generation upper limit calculation unit

Claims (14)

Equipped with solar power generation equipment, wind power generation equipment, and power control equipment,
The power control device calculates the amount of possible wind power generation in fine weather, which is the difference between the interconnection capacity and the output of photovoltaic power generation in fine weather, and combines the output of photovoltaic power generation in fine weather with the power output of the photovoltaic power generation facility. The upper limit of the photovoltaic power generation facility is calculated based on the sum of the photovoltaic power generation capacity and the photovoltaic power generation capacity in fine weather. A hybrid power generation system featuring. In the hybrid power generation system according to claim 1,
The margin coefficient is determined according to the response speed of the solar power generation facility and the wind power generation facility.
Hybrid power generation system. In the hybrid power generation system according to claim 2,
The margin coefficient is characterized in that the response speed of the wind power generation facility is divided by the response speed of the solar power generation facility.
Hybrid power generation system. In the hybrid power generation system according to claim 2,
The margin coefficient is calculated by subtracting the response speed of the solar power generation facility and the response speed of the wind power generation facility.
Hybrid power generation system. In the hybrid power generation system according to any one of claims 1 to 4.
The photovoltaic power generation output in fine weather is characterized by being created using past historical data and a theoretical formula for the amount of solar radiation.
Hybrid power generation system. In the hybrid power generation system according to any one of claims 1 to 5.
It is provided with a power storage facility, and is characterized in that the wind power generation possible amount is charged and discharged to the power storage facility.
Hybrid power generation system. In the hybrid power generation system according to any one of claims 1 to 5.
Equipped with power storage equipment
The power control device estimates the maximum power generation capacity of the wind power generation facility, instructs the wind power generation facility to generate the maximum power generation capacity, and sets the maximum power generation capacity and the upper limit value of the wind power generation facility. It is characterized in that the difference is charged and discharged to the power storage equipment.
Hybrid power generation system. It is a power control device that controls solar power generation equipment and wind power generation equipment.
Calculate the amount of possible wind power generation in fine weather, which is the difference between the interconnection capacity and the output of photovoltaic power generation in fine weather, and the margin coefficient for the difference between the photovoltaic power generation output in fine weather and the power generation output of the photovoltaic power generation facility. A power control device characterized in that the maximum value of the photovoltaic power generation facility is calculated based on the sum of the photovoltaic power generation capacity and the photovoltaic power generation capacity in fine weather. .. The power control device according to claim 8.
The margin coefficient is determined according to the response speed of the solar power generation facility and the wind power generation facility.
Power control device. The power control device according to claim 9.
The margin coefficient is characterized in that the response speed of the wind power generation facility is divided by the response speed of the solar power generation facility.
Power control device. The power control device according to claim 9.
The margin coefficient is calculated by subtracting the response speed of the solar power generation facility and the response speed of the wind power generation facility.
Power control device. The power control device according to any one of claims 8 to 11.
The photovoltaic power generation output in fine weather is characterized by being created using past historical data and a theoretical formula for the amount of solar radiation.
Power control device. The power control device according to any one of claims 8 to 12.
It is characterized by controlling a power storage facility and charging / discharging the wind power generation capacity to the power storage facility.
Power control device. The power control device according to any one of claims 8 to 12.
Control the power storage equipment,
The maximum power generation capacity of the wind power generation facility is estimated, the wind power generation facility is instructed to generate the maximum power generation capacity, and the difference between the maximum power generation capacity and the upper limit value of the wind power generation facility is used in the power storage facility. Characterized by charging and discharging,
Power control device.

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