JP7181160B2 - Power generation control device, power generation control method, and renewable energy hybrid power generation system - Google Patents

Description

The present invention relates to a renewable energy hybrid power generation system including a plurality of renewable energy power generation facilities, a renewable energy hybrid power generation control device, and a control method thereof.

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

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

In addition, the output power of renewable energy power generation varies greatly depending on the weather. There is also the issue of lowering Here, the facility utilization rate is the ratio of the actual amount of generated power to the amount of power obtained when the power generation facility continues to operate at 100% interconnection capacity.

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

In Patent Document 1, "a power generation system that supplies power to a commercial power system via a substation, comprising a first power generation facility that generates power from a first energy source and power from a second energy source a second power generation facility that generates power, a second power generation control device that controls the power generated by the second power generation facility, power generated by the first power generation facility, and power generated by the second power generation facility a power generation control device for supplying a combined power generated by summing the power generated to the power system, the power generation control device comprising power generation prediction means for predicting the power generated by the first power generation equipment, Power generation in the second power generation facility based on the power value obtained by subtracting the predicted value of the power generated by the first power generation facility predicted by the generated power prediction means from the upper limit value set from the interconnection capacity. A power limit command value is calculated, and the combined generated power obtained by summing the predicted value of the generated power of the first power generation equipment and the calculated limit command value of the generated power of the second power generation equipment is the upper limit. It is determined whether or not the value exceeds the upper limit value, and if the upper limit value is exceeded, the calculated limit command value is transmitted to the second power generation control device or the second power generation equipment as an output control signal. power generation system.”

WO2018_003947

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 solar power generation facility and the wind power generation The combined output of the installation shall not exceed the interconnection capacity. Therefore, it is necessary to control the additional wind power generation equipment so that the combined output does not exceed the interconnection capacity. , the interconnection capacity may be exceeded. Also, if an excessive margin is provided so as not to exceed the interconnection capacity, the capacity factor of the wind power generation facility will be lowered.

An object of the present invention is to provide a power generation control device, a power generation control method, and a renewable energy hybrid power generation system that ensure the facility utilization rate of wind power generation facilities without exceeding interconnection capacity.

In order to solve such problems, the present invention provides a power generation control device in a renewable energy hybrid power generation system in which power generated by solar power generation and power generated by wind power are combined and supplied to the power system via an interconnection point. storage means for storing the past operation history of the renewable energy hybrid power generation system; and a hybrid controller for determining electric power including wind power generation. A first upper limit value that is the difference between the power generation amount determined by the characteristics and a second upper limit value that is the difference between the power generation amount determined by the ideal characteristics of the photovoltaic power generation and the actual power generation amount of the photovoltaic power generation. By referring to the operation history of , it is foreseen that the combined power of the power generated by solar power generation and the power generated by wind power generation will exceed the standard value, and a margin is given to set the second upper limit value, and the first upper limit value and the first 2, the power generated by the solar power generation or the power generated by the wind power generation is controlled.

The present invention also provides a renewable energy hybrid power generation system controlled by a power generation control device.

The present invention also provides a power generation control method in a renewable energy hybrid power generation system in which power generated by photovoltaic power generation and power generated by wind power are combined and supplied to an electric power system via an interconnection point, the renewable energy hybrid power generation system. The first upper limit is the difference between the interconnection capacity at the interconnection point and the amount of power generation determined by the ideal characteristics of photovoltaic power generation, and the amount of power generation determined by the ideal characteristics of photovoltaic power generation and the solar power generation second upper limit, which is the difference between the actual amount of power generated by photovoltaic power generation, refer to the operation history, and foresee that the combined power of the power generated by photovoltaic power generation and the power generated by wind power generation will exceed the standard value, The second upper limit value is set with a margin, and either power generated by solar power generation or power generated by wind power generation is controlled by the first upper limit value and the second upper limit value.

According to the present invention, since the operation history is used to determine the output suppression value of the solar light or the wind turbine, it is possible to increase the total power generated by the solar light and the wind turbine without exceeding the grid interconnection capacity, which is economical. can be turned into a power plant that does not overwhelm. In addition, it is possible to introduce new power plants even in areas where there is currently no or very little free capacity. Furthermore, by maintaining the energy amount of the total output, heat generation can be suppressed, and hardware such as power lines and circuit breakers can be prevented from deteriorating due to heat.

1 is a diagram showing an example of the overall configuration of a renewable energy hybrid power generation system according to a first embodiment; FIG. 4 is a diagram showing a detailed configuration example of a hybrid controller 12 according to the first embodiment; FIG. FIG. 4 is a diagram showing an image of a wind power generation upper limit value according to the first embodiment; (1) The figure which shows the example of the electric power generation possible area|region of the wind power generation equipment calculated by Formula. FIG. 4 is a diagram showing a power generation possible region of the wind power generation equipment 6 when a margin is provided for (PL-Ppv). 4 is a block diagram of a margin calculator according to the first embodiment; FIG. 4 is a flowchart of arithmetic processing of a margin calculator according to the first embodiment; 4A and 4B are image diagrams of statistical processing in the margin correction unit according to the first embodiment; FIG. The figure which shows an example of learning data. FIG. 2 is a block diagram of an interconnection capacity excess prevention unit according to the first embodiment; 4 is a flowchart of arithmetic processing of an interconnection capacity excess prevention unit according to the first embodiment; FIG. 4 is a block diagram of a wind power generation output upper limit calculation unit according to the first embodiment; FIG. 4 is an image diagram of margin behavior according to the first embodiment; The figure which shows the whole structural example of the renewable energy hybrid power generation system which concerns on Example 2. FIG. FIG. 8 is a diagram showing a detailed configuration example of a hybrid controller according to the second embodiment; 10 is a flow chart of a wind power generation output upper limit value calculation unit according to the second embodiment. FIG. 11 is a block diagram of a wind power generation output upper limit value calculation unit according to the second embodiment; The figure which shows the whole structural example of the renewable energy hybrid power generation system in Example 3. FIG. FIG. 11 is a block diagram of a wind power generation output upper limit value calculation unit according to the third embodiment;

Embodiments of the present invention will be described below with reference to the drawings. In addition, in all the drawings for explaining the present invention, parts having the same functions are denoted by the same reference numerals, and repeated description thereof may be omitted.

FIG. 1 is a block diagram showing an overall configuration example of a renewable energy hybrid power generation system according to Embodiment 1 of the present invention.

A renewable energy hybrid power generation system 100 using photovoltaic power generation and wind power generation is interconnected to a power grid 1 . A renewable energy hybrid power generation system 100 includes a solar power generation facility 2 , a wind power generation facility 6 , and a power control device 11 . The total sum of the photovoltaic 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 at the interconnection point 101 as the system power Psys. Here, the upper limit value of the system power Psys is the interconnection capacity PL at the interconnection point 101 with the power system 1 .

The photovoltaic power generation facility 2 includes a photovoltaic panel 3 and a photovoltaic power conditioner 4 . The solar panel 3 can be configured, for example, by connecting a plurality of silicon-based solar cells such as monocrystalline silicon, polycrystalline silicon, microcrystalline silicon, and amorphous silicon solar cells in series and parallel. Alternatively, the solar panel 3 may be configured by connecting a plurality of compound solar cells such as InGaAs, GaAs, and CIS (calcobarite) in series and parallel. Furthermore, in the present embodiment, as the solar cell that constitutes 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.

In addition, the solar power conditioner 4 converts the DC power output from the solar panel 3 into AC solar power Ppv, and outputs the AC power to the power system 1 . Therefore, the photovoltaic power Ppv supplied to the power grid 1 is limited by the rated output of the photovoltaic power conditioner 4 . Also, the photovoltaic power Ppv is measured by the wattmeter 5 .

The wind power generation facility 6 is composed of a wind turbine 7 and a wind turbine power conditioner 8 . It has a function of controlling the power output by the wind turbine power conditioner 8 (power conditioner control) and a function of controlling the power output by controlling the angle of the blades of the wind turbine (pitch angle control). Until the power generated by the windmill 7 reaches the rated output, the windmill is rotated only by wind power to generate power, and when the rated output is reached, the pitch angle is controlled to keep the rotational speed constant. Also, the amount of power that can be generated is calculated from the number of revolutions of the generator, and is given to the wind turbine power conditioner 8 . Here, the wind turbine power conditioner 8 may be installed under the tower of the wind turbine. Wind-generated power Pwt output from the wind power generation equipment 6 is supplied to the power system 1 and is measured by the wattmeter 9 .

System power Psys, which is a combined output of photovoltaic power Ppv and wind power Pwt, is measured by power meter 10 and supplied to power grid 1 at interconnection point 101 .

The power control device 11 has a function of controlling the power so as to improve the facility utilization factor while suppressing the system power Psys output from the renewable energy hybrid power generation system 100 to the interconnection capacity PL or less. It comprises a controller 12, a wind turbine controller 13, a communication network 14 (such as the Internet), an external controller 15, a terminal 16, and a learning result storage means 17b. In the power control device 11, the hybrid controller 12 is communicably connected to an external controller 15 via a communication network 14, and the external controller 15 is connected to terminals 16 via a serial bus, 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 location remote from the renewable energy 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. Also, for example, the operator can display the state (operational state) of the renewable energy hybrid power generation system 100 on the terminal 16 . In this 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. It may be provided outside.

The hybrid controller 12 is configured by an arithmetic device such as a CPU (Central Processing Unit), for example. The hybrid controller 12 is connected to the solar power conditioner 4 and the wind turbine power conditioner 8 via a communication network. In this case, the mode of communication connection can be arbitrarily set, and for example, both modes of wireless communication and wired communication can be applied.

The hybrid controller 12 acquires the photovoltaic power Ppv measured by the wattmeter 5, the details of which will be described later. The photovoltaic power Ppv may be measured by the solar power conditioner 4 . The same is true for the wind power generation equipment 6, and the wind power generation power Pwt measured by the power meter 9 is acquired. The wind power generation power Pwt may be measured by the wind turbine power conditioner 8 . The acquisition operation of these various signals (various types of information) by the hybrid controller 12 may be performed periodically or irregularly.

In addition, the hybrid controller 12 determines the risk that the system power Psys, which is the combined output thereof, exceeds the interconnection capacity PL based on the measured photovoltaic power Ppv and the measured wind power Pwt, Various calculations are performed so as not to exceed the interconnection capacity PL.

Although FIG. 1 shows the case where the solar power generation equipment 2 and the wind power generation equipment 6 are installed individually, the present invention is not limited to this. For example, in a large-scale photovoltaic power generation facility 2 such as a mega-solar equipped with a large number of solar panels 3 , a plurality of solar power conditioners 4 are installed according to the plurality of solar panels 3 . Similarly, a large-scale wind power generation facility 6 such as a wind farm having a large number of wind turbines 7 may be used.

The wind turbine controller 13 has a role of allocating the wind power generation upper limit value Pwt_max calculated by the hybrid controller 12 to each wind turbine of a plurality of wind turbine groups. The wind power generation upper limit value Pwt_max may be distributed evenly to each wind power generation facility 6 , or may be changed according to the wind conditions of each wind power generation facility 6 .

The control of the electric power in each wind turbine may be an upper limit control that limits the output within the range of the wind power generation upper limit Pwt_max allocated to the wind power generation equipment 6, or the wind power generation upper limit Pwt_max may be set to a target value. It is also possible to execute feedback control as follows. The present invention does not particularly limit the output control method in the wind turbine generator 6 .

The storage means 17 stores the photovoltaic power Ppv, the wind power Pwt, the system power Psys that is the combined output, the continuous time (seconds) during which the system power Psys exceeds the interconnection capacity PL, and the system power Psys exceeds the interconnection capacity PL. Accumulate operation history data such as excess amount (kW amount) and weather information. Furthermore, the accumulated operational history data is statistically processed and stored.

The operation history data accumulated in the storage unit 17 is used when calculating the wind power generation upper limit value Pwt_max. For example, the margin amount can be determined by accumulating the excess amount from the past interconnection capacity PL, the excess time, and the margin amount at that time, and comparing it with the current excess information. Specifically, it will be described later.

Here, the storage means 17 may be held as hardware, or may be held on the cloud. Alternatively, the wind power generation upper limit Pwt_max may be calculated by linking the storage means 17 of a plurality of power plants. By having the storage means 17 on the cloud or by connecting the hardware via communication, the power generation data can be viewed remotely. Earnings can be secured.

A specific calculation method in the hybrid controller 12 will be described with reference to FIG. FIG. 2 shows a detailed configuration example of the hybrid controller 12 . The hybrid controller 12 is composed of a storage 121, a sunny solar power generation waveform generator 122, a margin calculator 123, a margin corrector 124, a wind power generation upper limit calculator 125, an interconnection capacity excess prevention unit 128, and a data storage unit 17a. be done.

The function of the hybrid controller 12, which will be described in detail below, is, in short, to output the photovoltaic power Ppv to the maximum without limiting it. The wind power generation upper limit value Pwt_max is calculated and operated so as not to exceed .

Here, in order to prevent the combined power from exceeding the interconnection capacity PL, the present invention implements countermeasures in three modes. A first mode M1 is a margin setting process during power generation for setting different margins depending on whether power is being generated or not. This processing is processed in the margin calculation unit 123, which will be described later.

A second mode M2 is a predictive margin setting process that foresees and responds to the excess of the interconnection capacity PL in the near future by referring to the past operating results. This process is processed by the learning result storage means 17b and the margin correction section 124, which will be described later.

The third mode M3 is an emergency protective process for responding to a sudden excess of the interconnection capacity PL at the present time, and this process is processed in the interconnection capacity excess prevention unit 128, which will be described later.

The processing contents of the hybrid controller 12 will be described in detail below. First, the storage 121 stores setting value information that can be set in advance, such as the interconnection capacity PL, the response speed Rpv of the solar power generation equipment 2, the response speed Rwt of the wind power generation equipment 6, and the communication delay time Tdelay.

The hybrid controller 12 stores the set value information stored in the storage 121, the photovoltaic power Ppv measured by the power meter 5, the wind power Pwt measured by the power meter 9, and the power meter 10. The wind power generation upper limit value Pwt_max of the wind power generation equipment 6 is calculated using the measured value information such as the system power Psys.

The fine weather photovoltaic power generation waveform creation unit 122 creates the fine weather photovoltaic power generation power Ppv_f. The photovoltaic power Ppv_f during fine weather may be calculated in advance and implemented using a map or a formula. Here, there is an advantage that the memory capacity of the controller can be reduced by implementing the photovoltaic power generation power Ppv_f under fine weather as a mathematical expression. On the other hand, the map implementation has the advantage of simplifying the algorithm implemented in the controller. Photovoltaic power generation output Ppv_f during fine weather is created by utilizing past power generation history data and a publicly available database, or by converting theoretical solar radiation calculated from a theoretical formula for solar radiation into power generation. There are various possible methods such as

FIG. 3 is a diagram showing an image of the wind power generation upper limit value Pwt_max, in which the horizontal axis indicates the time of day and the vertical axis indicates the power output. In this figure, the photovoltaic power Ppv_f in fine weather is the ideal power in fine weather that can be generated from 8:00 am to 4:00 pm, for example. Therefore, the photovoltaic power output under general weather conditions is indicated by Ppv, which is within the photovoltaic power Ppv_f during fine weather, for example.

Note that the photovoltaic power Ppv_f during fine weather is equal to or less than the interconnection capacity PL even at its maximum value. Here, system power Psys, which is a combined output of photovoltaic power Ppv and wind power Pwt, is operated so as to be equal to or less than interconnection capacity PL. Therefore, the difference between the interconnection capacity PL and the actual photovoltaic power Ppv is the power range that the wind power Pwt can take.

In the present invention, the difference Pwt_max between the interconnection capacity PL, which is the power range that the wind power generation power Pwt can take, and the actual photovoltaic power generation power Ppv is divided into two and grasped, and for each divided difference Perform monitoring and control from different perspectives. One divided is Pwt_max1, which is the difference between the interconnection capacity PL and the photovoltaic power Ppv_f during fine weather, and the other divided is the difference between the photovoltaic power Ppv_f during fine weather and the actual photovoltaic power Ppv. There is Pwt_max2.

In FIG. 2, the wind power generation upper limit calculation unit 125 is composed of a wind power generation upper limit calculation unit 125A and a wind power generation upper limit calculation unit 125B. Of these, the wind power generation upper limit calculation unit 125A handles Pwt_max1, which is the difference between the interconnection capacity PL and the photovoltaic power Ppv_f in fine weather, and the wind power generation upper limit calculation unit 125B handles the photovoltaic power Ppv_f in fine weather. Handle Pwt_max2, which is the difference in the actual photovoltaic power Ppv. Note that the wind power generation upper limit value calculation unit 125A and the wind power generation upper limit value calculation unit 125B differ in the concept of handling the difference. The details of the handling of the wind power generation upper limit calculation unit 125A and the wind power generation upper limit calculation unit 125B will be described later.

In FIG. 2, the margin calculation unit 123 uses the response speed Rpv of the solar power generation equipment 2 and the response speed Rwt of the wind power generation equipment 6 to calculate the system power Psys, which is the combined output of the solar power generation equipment 2 and the wind power generation equipment 6. , a margin to be provided for the wind power generation upper limit value Pwt_max, which is a command value for suppressing the wind power generation power Pwt of the wind power generation equipment 6 so as not to exceed the interconnection capacity PL. Here, the reason why the margin is provided is that the response speed of the solar power generation equipment 2 and the wind power generation equipment 6 is different, and the output suppression of the wind power generation power Pwt is not kept in time, and the interconnection capacity PL is prevented from exceeding. is. Here, it is defined by the margin coefficient m=min(Rwt/Rpv, 1).

The processing in the margin calculation unit 123 relates to the above-described first mode M1, and is a process of setting a margin during power generation for setting different margins depending on whether power is being generated or not.

The margin correction unit 124 corrects the margin coefficient m calculated by the margin calculation unit 123 based on the statistical information of the excess time and the amount of excess accumulated in the learning result storage unit 17b to obtain m'.

The processing in the margin correction unit 124 relates to the above-described second mode M2, in which the excess of the interconnection capacity PL in the near future is predicted by referring to the past operation results, and the corresponding predictive margin setting processing is performed. It is. The first mode M1 and the second mode M2 will be described later in detail.

The wind power generation upper limit calculation unit 125 includes a wind power generation upper limit calculation unit 125A and a wind power generation upper limit calculation unit 125B. The wind power generation upper limit value calculation unit 125 calculates the photovoltaic power generation Ppv measured by the power meter 5, the interconnection capacity PL which is the information stored in the storage 121, and the fine weather photovoltaic power generation waveform creation unit 122. The wind power generation upper limit value Pwt_max is calculated using the photovoltaic power generation power Ppv_f and m′ obtained by correcting the margin m calculated by the margin calculation unit 123 by the margin correction unit.

The interconnection capacity excess prevention unit 128 monitors the system power Psys, and calculates a coefficient Pfb for correcting the wind power generation upper limit Pwt_max when the system power Psys exceeds the interconnection capacity PL. Here, as a correction method, for example, the excess of the system power Psys from the interconnection capacity PL (Psys-PL) is subtracted from the sum of the calculation results of the wind power generation upper limit calculation unit 125A and the wind power generation upper limit calculation unit 125B. However, the correction method is not limited to subtraction.

The processing in the interconnection capacity excess prevention unit 128 relates to the above-described third mode M3, and is an emergency protective process for responding to an excess of the interconnection capacity PL that suddenly occurs at the present time. be. Details will be described later.

The wind power generation upper limit value Pwt_max given by the wind power generation upper limit value calculation unit 125 is then corrected with Pfb output from the interconnection capacity excess prevention unit 128, and sent to the wind turbine controller 13 as a new wind power generation upper limit value Pwt_max. be. As a result, the wind power generation equipment 6 is operated according to the wind power generation upper limit value Pwt_max obtained by the wind power generation upper limit calculation unit 125 within a range that does not exceed the interconnection capacity PL.

Also, the data storage unit 17a can store all the parameters in the hybrid controller and feed them back to the control. It can be said that the data storage unit 17a and the learning result storage unit 17b constitute the storage means 17 shown in FIG.

Description will be made with reference to FIG. 3 again. The area where the wind power generation equipment 6 can generate power is (interconnection capacity PL - actual photovoltaic power Ppv). If the photovoltaic power Ppv increases sharply, the output suppression of the wind power generation equipment 6 will not be in time, and the system power Psys will exceed the interconnection capacity PL. For this purpose, by setting a margin to the wind power generation upper limit value Pwt_max=(interconnection capacity PL−actual photovoltaic power), excess of the interconnection capacity PL can be prevented. However, if a margin is set for (interconnection capacity PL - actual solar power generation power), the margin around sunrise/sunset, which has a low risk of exceeding the interconnection capacity PL, becomes excessive, and the capacity factor of the wind power generation equipment 6 It will lead to a decrease, and the amount of electricity sold will decrease. On the other hand, the photovoltaic power Ppv of the photovoltaic power generation equipment 2 does not exceed the photovoltaic power Ppv_f during fine weather.

In view of this point, in the present invention, the wind power generation upper limit Pwt_max = (interconnection capacity PL - actual photovoltaic power generation) is divided into two differences (Pwt_max1 and Pwt_max2) as described above. . Of these, wind power is generated without a margin for the difference Pwt_max1 (PL-Ppv_f) between the interconnection capacity PL that does not fluctuate regardless of the weather and the photovoltaic power Ppv_f under fine weather. In addition, the difference Pwt_max2 (Ppv_f-Ppv) between the photovoltaic power Ppv_f during fine weather and the photovoltaic power Ppv of the photovoltaic power generation equipment 2, which may fluctuate depending on the weather, is generated by wind power with a margin. It is possible to prevent Psys from exceeding the interconnection capacity PL and to ensure the capacity factor of the wind power generation equipment 6 .

That is, the wind power generation upper limit value Pwt_max is calculated by equation (1).
[Number 1]
Pwt_max = (PL-Ppv_f) + (Ppv_f-Ppv) x m'
= Pwt_max1 + Pwt_max2 (1)
Fig. 4(a) shows the power generation possible area of the wind power generation facility 6 calculated by the formula (1), and Fig. 4(b) shows the wind power generation facility 6 when a margin is provided for (PL-Ppv), which is considered to be general. shows the possible power generation area. In Fig. 4(a), a margin is provided only for (Ppv_f-Ppv), so the margin around sunrise and sunset is smaller than in Fig. 4(b), and the amount of power sold increases. Without exceeding, the capacity factor of the wind power generation equipment 6 can be secured. On the other hand, FIG. 4(b) provides a constant value margin for the photovoltaic power Ppv, which leads to a decrease in the capacity factor of the wind power generation equipment 6. FIG.

FIG. 5 shows a block diagram of the margin calculator 123. As shown in FIG. A margin coefficient m is calculated using the photovoltaic power Ppv, the response speed Rpv of the photovoltaic power generation equipment 2 and the response speed Rwt of the wind power generation equipment 6 .

FIG. 6 shows a flowchart of arithmetic processing of the margin calculator 123 . Since it is sufficient to provide a margin only while the photovoltaic power generation equipment 2 is generating power, it is necessary to detect when power is being generated. While the photovoltaic power generation equipment 2 is not generating power, the wind power generation upper limit value and the interconnection capacity PL are the same (Pwt_max=PL), and there is no possibility of fluctuation, so no margin is required.

Therefore, in the flow of FIG. 6, when the photovoltaic power Ppv>0 continues for a certain period of time (processing step S11), it is determined that the photovoltaic power generation facility 2 is generating power, and the margin m = Rwt/Rpv is calculated ( processing step S12). By setting the margin m=Rwt/Rpv, the wind power generation facility 6 can be controlled so as not to exceed the interconnection capacity PL even when the photovoltaic power generation facility 2 continuously fluctuates at the response speed Rpv.

On the other hand, if Ppv≦0, it is determined that the photovoltaic power generation facility 2 is not generating power, and the margin coefficient m is set to 1 (processing step S13). That is, it can be defined by m=min(Rwt/Rpv, 1). Although (Ppv_f−Ppv)×m is used as an example of the margin calculation method this time, it may be (Ppv_f−Ppv)−m.

The above-described processing in the margin calculation unit 123 relates to the first mode M1 of performing margin setting processing during power generation in which different margins are set depending on whether power is being generated or not. As a result of distinguishing between when power is being generated and when it is not, in many cases, nighttime is distinguished from daytime, or cloudy weather, rainy weather, and fine weather, which do not or cannot generate electricity, are distinguished. According to the flow of FIG. 6, a certain margin (1 in this case) is given when power is not being generated, but a larger margin determined by the response speed ratio is given when power is being generated. . Note that the constant margin value when power is not being generated may include no margin.

FIG. 7 shows an image of statistical processing in the margin correction unit 124. FIG. The horizontal axis of the graph indicates the excess duration time from the interconnection capacity PL×the amount of excess electric power from the interconnection capacity PL, and the vertical axis indicates the margin amount. It is considered necessary to increase the margin because the influence on the power system 1 is greater when the excess power is exceeded for a long time and when the amount of excess power is large. Therefore, in case 1, which indicates an excess with a short excess duration time and a small excess power amount, the margin amount is small, and in case 2, which indicates an excess with a long excess duration time and a large excess power amount, the margin amount is corrected to be large. . Case 3, which shows an intermediate excess of excess duration and excess power, such as an excess with a long excess duration and a small excess power amount, or an excess with a short excess duration and a large excess power amount, is small. It is better to adopt intermediate measures such as granting a long margin or granting a large margin for a short time. In order to prevent thermal deterioration of power lines, circuit breakers, etc., it is desirable to manage the excess duration times the excess power amount (energy amount, Wh) in this way.

In the statistical processing in the margin correction unit 124, regarding the interconnection capacity PL when judging the excess duration time from the interconnection capacity PL or the excess power amount from the interconnection capacity PL, this is the actual interconnection at the interconnection point. When the system capacity PL is assumed to be 100%, a value such as 80% or 90% is preferable. In other words, it means a reference value set for 100% interconnection capacity PL. This is because the actual operation of the power system does not allow exceeding the 100% interconnection capacity PL. In this specification, a reference value, which is 80% or 90% of the interconnection capacity PL set to 100%, is treated as the interconnection capacity PL, and excess from this reference value is monitored.

In statistical processing in the margin correction unit 124, learning processing is performed using history information in past operations. When comparing the knowledge obtained from this learning with the weather at the present time, it is possible to predict weather fluctuations that may occur in the near future, or even power fluctuations. ) by analogy. The history information of the past operation includes the determination result of the interconnection capacity excess prevention unit 128, which will be described later. Needless to say, the excess of the interconnection capacity PL in this case is determined based on the reference value described above.

For this reason, in the configuration of FIG. These are, for example, time-series data of photovoltaic power Ppv, wind power Pwt, and system power Psys, and the following statistical data are created and accumulated. As the statistical data, various formats such as histograms and scatter diagrams are conceivable, and these can be used in appropriate formats in the present invention.

In FIG. 2 showing a detailed configuration example of the hybrid controller 12, the storage unit 17 includes a data accumulation unit 17a for accumulating measured data, statistical processing using the measured data, and statistical information obtained as a result of learning processing. It is divided and described in the learning result storage means 17b for storing data.

An example of the statistical data stored in the learning result storage means 17b is statistical data of the correlation between the weather, the amount of deviation (kW), and the deviation time (s). It describes the amount (kW) and deviation time (s). Another example is the correlation between season (month), deviation amount (kW), and deviation time (s) as statistical data. It describes the time (s). In another example, the correlation between time, deviation amount (kW), and deviation time (s) is expressed as statistical data. ) is described. In this case, the learning data includes statistical data.

The history information of the past driving stored in the data storage unit 17a is appropriately learned by the learning function and stored as learning data in, for example, the learning result storage unit 17b. The learning data is, for example, statistical data of the correlation between deviation amount (kW), deviation time (s), and correction margin amount, and correction margin amount can be determined from deviation amount (kW) and deviation time (s). , the margin amount can be updated by learning using history data.

FIG. 8 shows an example of learning data. For example, when it is sunny, the deviation amount, deviation time, and correction margin amount tend to be small, and the deviation amount, deviation time, and correction margin amount are all small. It is a finding that shows a tendency to increase. When it is cloudy, when the power generation is low, the deviation amount, deviation time, and correction margin tend to be small. It is knowledge. Although a detailed description of the learning data situation in FIG. 8 will be omitted, similar trends are accumulated as learning data in the case of cloudy weather followed by sunny weather, or in spring, summer, autumn, and winter.

In the statistical processing in the margin correction unit 124, these learning data are referred to based on the current situation, and the correction margin amount is determined from the learning result of the past history in the closest current situation. This process relates to the above-described second mode M2, in which the excess of the interconnection capacity PL in the near future is predicted with reference to the past operation results, and the corresponding predictive margin setting process is performed.

FIG. 9 shows a block diagram of the interconnection capacity excess prevention unit 128. As shown in FIG. The interconnection capacity excess prevention unit 128 is composed of an interconnection capacity excess detection unit 1281 and a wind turbine upper limit value correction amount calculation unit 1282 . The system power Psys and the interconnection capacity PL are compared by the interconnection capacity excess detection unit 1281, and when it is determined that the interconnection capacity is exceeded, the wind turbine upper limit value correction amount calculation unit 1242 calculates the correction coefficient Pfb. The correction coefficient Pfb is calculated by |PL-Psys|, for example. On the other hand, Pfb=0 when it is determined that it is not exceeded. In this case, excess interconnection capacity is judged based on the reference value.

FIG. 10 shows a flowchart of arithmetic processing of the interconnection capacity excess prevention unit 128 . First, the magnitude relationship between the system power Psys and the interconnection capacity PL is compared (processing step S21). When Psys>PL, the wind power generation upper limit value Pwt_max is corrected to Pwt_max2=Pwt_max+(Psys-PL) so that the interconnection capacity is not exceeded any more. (Processing step S22) After that, if the period of Psys<PL continues for a certain period of time (processing step S23), the process ends. On the other hand, if Psys>PL, the process returns to step S22.

Incidentally, the actual excess scene in the interconnection capacity excess prevention unit 128 is reflected in the aforementioned learning result storage means 17b. As a result, once the system power Psys has exceeded the interconnection capacity PL in the interconnection capacity excess prevention unit 128, if a similar event occurs in the future, the margin correction unit 124 increases the margin. , can be prevented prophylactically from being exceeded again.

The processing in the interconnection capacity excess prevention unit 128 relates to the above-described third mode M3, and is an emergency protective process for coping with an excess of the interconnection capacity PL that suddenly occurs at the present time. is.

FIG. 11 shows a block diagram of the wind power generation upper limit calculation unit 125 . Of these, the wind power generation upper limit calculation unit 125A takes the difference between the interconnection capacity PL and the photovoltaic power Ppv_f under fine weather and sets it as Pwt_max1 (Pwt_max1=PL-Ppv_f).

Further, in the wind power generation upper limit calculation unit 125B, the result of subtracting the multiplication result of the communication delay time Tdelay and the response speed Rpv of the photovoltaic power generation equipment 2 from the difference between the photovoltaic power Ppv_f and the photovoltaic power Ppv during fine weather. is multiplied by the margin coefficient m' to be Pwt_max2. This relationship is shown in equation (2).
[Number 2]
(Pwt_max2=(Ppv_f−Ppv−Tdelay×Rpv)×m′) (2)
The sum of Pwt_max1 and Pwt_max2 is the wind power generation upper limit value Pwt_max. As a result, the system power Psys does not exceed the interconnection capacity PL, and the capacity factor of the wind power generation equipment 6 can be improved.

In addition, it is preferable to consider the communication delay time Tdelay in the processing of the wind power generation upper limit calculation unit 125B. In this case, as the communication delay time Tdelay, it is preferable to support two types of response delay and communication delay.

Of these, the response delay represents the difference between the speed at which the solar output increases rapidly and the speed at which the wind turbine output is suppressed, for example, when solar power is the main source of power generation. This also includes wind turbine mechanical delays such as pitch control. On the other hand, the communication delay represents the time required for the controller to acquire the data of the measuring instrument (power meter), calculate the command value, and send it to the wind turbine. Including the communication delay countermeasure margin, Pwt_max2 shown in FIG.

In the equation (2), (Ppv_f-Ppv) and Tdelay×Rpv, which indicates the communication delay, depend on the level at which the system power Psys allows deviation from the interconnection capacity and the rated output ratio between the photovoltaic PV and the wind turbine WT. different. It can be said that the looser the allowable deviation level is and the closer the rated ratio between the photovoltaic power generation PV and the wind turbine WT is to 1, the higher the effect of Tdelay×Rpv.

In this embodiment, the control target is the wind power generation facility 6, but if the FIT unit price of the solar power generation facility 2 is lower, the control target is switched to the photovoltaic power generation facility 2. Profitability can be improved by switching the power generation equipment to be used.

FIG. 12 is an image diagram of the margin amount in the first embodiment. The horizontal axis indicates the time of day, and the vertical axis indicates the electric power, showing the relationship between the interconnection capacity PL and the variable margin m. It shows that the margin m is variably operated in the daytime hours when the photovoltaic power generation facility 2 operates. Moreover, as a matter of fact, the variable range of the margin m tends to become smaller during the start and stop times of the photovoltaic power generation equipment 2 in the morning and evening.

If the method of the first embodiment is used, the margin becomes variable, so the facility utilization rate is improved compared to the case where the margin is constant.

The facility of the first embodiment described above is a power generation control device in a renewable energy hybrid power generation system in which power generated by photovoltaic power generation and power generated by wind power are combined and supplied to the power system through an interconnection point. Equipped with storage means for storing the past operation history of the potential energy hybrid power generation system, and a hybrid controller that determines electric power including wind power generation. The hybrid controller is determined by the interconnection capacity at the interconnection point and the ideal characteristics of the solar power generation. A first upper limit value that is the difference in power generation amount and a second upper limit value that is the difference between the power generation amount determined by the ideal characteristics of the photovoltaic power generation and the actual power generation amount of the photovoltaic power generation, and the operation history of the storage means , foreseeing that the combined power of the power generated by photovoltaic power generation and the power generated by wind power generation will exceed the reference value, giving a margin to set the second upper limit value, the first upper limit value and the second A power generation control device or a renewable energy hybrid power generation system characterized by controlling either power generated by photovoltaic power generation or power generated by wind power generation according to the upper limit value of .

In the first embodiment, a method of complying with the interconnection capacity PL through cooperation between power supply facilities has been described. On the other hand, in a second embodiment, when a load and a power storage device are further provided, a method of complying with the interconnection capacity PL through cooperation between the load and the power storage device and the wind power generation equipment will be described.

FIG. 13 is a block diagram showing an example of the overall configuration of a renewable energy hybrid power generation system according to Embodiment 2 of the present invention. FIG. 13 has a configuration in which a power storage device 18 and a load 21 are added to FIG.

Among them, the power storage device 18 is composed of a storage battery power conditioner 19 and a storage battery 20 . The DC charging/discharging power output from the storage battery 20 is converted into AC charging/discharging power Pbat by the storage battery power conditioner 19 and output to the power system 1 . Note that the storage battery power conditioner 19, the solar power conditioner 4, and the wind turbine power conditioner 8 are sometimes referred to as grid-connected inverters.

The storage battery 20 is composed of a secondary battery such as a lead storage battery, a lithium ion storage battery, a nickel-hydrogen storage battery, or the like. The hybrid controller 12 receives information from the solar power generation equipment 2 and the wind power generation equipment 6 as well as the charging rate SOC of the storage battery 20 from the power storage device 18 and transmits the charge/discharge power Pbat to the power conditioner 19 for storage battery. Here, the storage battery 20 is shown as an example of the power storage device 18, but any device that can store energy such as a pumped hydro power generator, a fuel cell, or hydrogen can be substituted.

The load 21 is an appropriate load facility in a power generation site equipped with a plurality of renewable energy power generation facilities, and the power consumption of the load 21 is the system output Psys, which is the combined output of the solar power generation facility 2 and the wind power generation facility 6. Then, the power storage device 17 is discharged to compensate for the shortage of power. Also, when the surplus power of the demand is generated, by charging the power storage device 17, the interconnection capacity PL of the power system is not exceeded, and the facility utilization rate is improved.

FIG. 14 shows a detailed configuration example of the hybrid controller 12 in the second embodiment. The difference from FIG. 2 is that the SOC (state of charge) of the power storage device 18 is added to the input of the hybrid controller 12, and the charge/discharge power setting Pbat and the load power setting Pload* are added to the output from the hybrid controller 12. is added.

With such a configuration, the hybrid controller 12 monitors the SOC of the storage battery 19, charges the power storage device 18 with the surplus power of the wind power generation equipment 6 until the SOC reaches the upper limit, and when the SOC reaches the upper limit, the wind power generation equipment Suppress the power of 6. Here, the photovoltaic power generation equipment 2 may be the one that suppresses the generated power, and the power generation equipment that sells electricity at a higher unit price is preferentially generated.

In FIG. 14, the wind power generation upper limit calculation unit 125 is composed of a wind power generation upper limit calculation unit 125A and a surplus power calculation unit 125C. Among these, the wind power generation upper limit calculation unit 125A is configured in the same manner as in the first embodiment, and functions to calculate and provide the wind power generation upper limit Pwt_max1 to the wind power generation equipment 6 .

On the other hand, the surplus power calculation unit 125C in the wind power generation upper limit calculation unit 125 converts the wind power generation upper limit Pwt_max2 for the wind power generation equipment 6 calculated by the wind power generation upper limit calculation unit 125B of the first embodiment into the load power for the load. It functions to give a target value Pload*. Accordingly, the second embodiment also has the functions of the first mode M1 and the second mode M2.

Furthermore, the surplus power calculation unit 125C in the wind power generation upper limit value calculation unit 125 determines the charge/discharge power Pbat for the storage battery 19 in order to realize the function of the third mode M3. Specifically, when the interconnection capacity excess prevention unit 128 detects that the system power Psys exceeds the interconnection capacity PL, the charge/discharge power Pbat is calculated taking into account the correction coefficient Pfb so that the excess does not occur any more. do. As a result, the wind power generation power Pwt can be sold as much as possible.

FIG. 15 shows an example of a flow chart of calculation processing of the surplus power calculation unit 125C in the wind power generation upper limit value calculation unit 125. As shown in FIG. First, the sum of the photovoltaic power generation Ppv and the wind power generation power Pwt is compared with the interconnection capacity PL (processing step S31). If Ppv+Pwt>PL, the surplus power (PL-(Ppv+Pwt)) is compared with the load power Pload (processing step S32).

If Pload>PL-(Ppv+Pwt), the surplus power PL-(Ppv+Pwt) is consumed by the load (processing step S33). On the other hand, if Pload<PL-(Ppv+Pwt), after the surplus power PL-(Ppv+Pwt) is consumed by the load, the surplus power is charged to the storage battery or the output of the wind power generation equipment 6 is suppressed (processing step S34). As a result, the electric power that should have been suppressed can be used to consume the load, so the capacity factor of the hybrid power generation system can be improved.

FIG. 16 shows an example of a block diagram of the wind power generation upper limit calculation unit 125 according to the second embodiment. First, the difference (PL-Ppv_f) between the interconnection capacity PL, which is a component that does not fluctuate regardless of the weather, and the photovoltaic power output Ppv_f under fine weather is defined as the wind power generation upper limit value Pwt_max of the wind power generation equipment 6 .

On the other hand, (Ppv_f−Ppv−Tdelay×Rpv)×m′, which may fluctuate depending on the weather, is consumed by the load 21 . Also, based on the information on the power that was not consumed by the load 21 and the information on the SOC and Pfb, the charge/discharge power Pbat is calculated. The risk of exceeding the interconnection capacity PL can be reduced by consuming (Ppv_f−Ppv) at the load 21 or charging the power storage device 18 with the risk of exceeding the interconnection capacity PL.

Note that FIG. 16 illustrates the charge/discharge power calculator 131 as a function for determining the charge/discharge power Pbat for the storage battery 19 .

As described above, the solar-wind hybrid power generation system 100 improves the capacity factor of the wind power generation equipment 6 without exceeding the interconnection capacity PL of the power system.

The equipment of the second embodiment described above is the same as the equipment of the first embodiment, but "power generated by photovoltaic power generation and power generated by wind power generation are combined and supplied to the power system via an interconnection point, and are equipped with loads and storage equipment. A power generation control device in a renewable energy hybrid power generation system, wherein a first upper limit value controls either power generated by solar power generation or power generated by wind power generation, and a second upper limit value controls load power and power storage equipment. A power generation control device or renewable energy hybrid power generation system characterized by controlling

In the first embodiment, a method of complying with the interconnection capacity PL by cooperation between power supply facilities, and in the second embodiment, a case where a load and a power storage device are further provided, is described in the third embodiment. A technique for adhering to the capacity PL will be described.

FIG. 17 is a block diagram showing the overall configuration of a renewable energy hybrid power generation system according to Embodiment 3 of the present invention.

FIG. 17 has a configuration in which a power storage device 18 and an anemometer 22 are added to FIG. By using the wind speed Vwt measured by the anemometer 22, it is possible to estimate the maximum possible power Pwt_e, which is the power of the wind turbine generator 6 before suppression. Therefore, power generation by the wind power generation equipment 6 is prioritized, and the power storage device 18 is charged only when the system power Psys exceeds the interconnection capacity PL unless the wind power generation power Pwt of the wind power generation equipment 6 is suppressed. , the capacity factor of the wind power generation facility 6 can be improved.

FIG. 18 shows a block diagram of the wind power generation upper limit calculation unit 125 in the third embodiment. The configuration of FIG. 18 includes wind power generation upper limit value calculation units 125A and 125B, and gives Pwt_max (=Pwt_max1+Pwt_max2) as one input of the correction unit 1313 . Also, as the other input of the correction unit 1313, the coefficient Pfb for correcting the wind power generation upper limit value Pwt_max from the interconnection capacity excess prevention unit 128 is input, and finally Pwt_max is determined and given to the wind power generation equipment 6. . Therefore, the configuration up to this point has the same control content as that of the first embodiment.

In addition, the wind power generation upper limit calculation unit 125 includes a possible maximum output estimation unit 1312, and the charge/discharge power calculation unit 131 determines the charge/discharge power Pbat. Of these, the maximum possible output estimator 1312 calculates the maximum possible power Pwt_e of the wind turbine generator 6 using the wind speed Vwt as an input value.

When the electric power charged in the power storage device 18 is discharged by the control with such a configuration, the electric power decreases due to the charge/discharge loss. Therefore, similarly to the first embodiment, the wind power generation upper limit value Pwt_max is calculated, and the difference between the maximum possible power Pwt_e of the wind power generation equipment 6 calculated by the maximum possible output estimating unit 1312 and the wind power generation upper limit value Pwt_max is stored in the power storage device 18. to charge.

As described above, the solar-wind hybrid power generation system 102 calculates the maximum possible power Pwt_e of the wind power generation equipment 6 based on the wind speed Vwt measured by the anemometer 22, so that the wind power generation equipment 6 can generate the maximum power. By charging the power storage device 18 only when the generated power Pwt must be suppressed, the facility utilization rate is improved without exceeding the interconnection capacity PL of the power system.

In addition, although the hybrid system of the photovoltaic power generation equipment 2 and the wind power generation equipment 6 has been described in the third embodiment, the power generation equipment is not limited to solar power or wind power, and two or more types of power generation equipment may be combined.

The equipment of Example 3 of the child is the same as in Example 1, "Electric power generated by solar power generation and power generated by wind power are combined and supplied to the power system through the interconnection point, and renewable energy hybrid power generation equipped with storage equipment A power generation control device in a system, which controls either power generated by photovoltaic power generation or power generated by wind power according to a first upper limit value and a second upper limit value, and the possibility of wind power generation equipment estimated using wind speed A power generation control device or a renewable energy hybrid power generation system characterized by controlling power storage equipment based on the sum of the maximum power, the first upper limit value, and the second upper limit value.

1: Power system 2: Solar power generation equipment 3: Solar panel 4: Solar power conditioners 5, 9, 10: Power meter 6: Wind power generation equipment 7: Wind turbine 8: Wind turbine power conditioner 11: Power control Device 12: Hybrid controller 13: Wind turbine controller 14: Network 15: External controller 16: Terminal 17: Storage means 18: Power storage device 19: Storage battery power conditioner 20: Storage battery 21: Load 22: Anemometer 121: Storage 122: Sunny Solar power generation waveform generation unit 123: Margin calculation unit 124: Margin correction units 125, 125a, 125b: Wind power generation upper limit calculation unit 128: Interconnection capacity excess prevention unit 17a: Data accumulation unit 17b: Learning result storage means 125c: Surplus power calculation unit 100: solar wind hybrid power generation system

Claims (15)

A power generation control device in a renewable energy hybrid power generation system in which power generated by photovoltaic power generation and power generated by wind power are combined and supplied to a power system via an interconnection point,
Storage means for storing past operation history in the renewable energy hybrid power generation system, and a hybrid controller for determining electric power including wind power generation,
The hybrid controller has a first upper limit that is the difference between the interconnection capacity at the interconnection point and the amount of power generation determined by the ideal characteristics of the photovoltaic power generation, and the amount of power generation determined by the ideal characteristics of the photovoltaic power generation and the photovoltaic power generation. and the second upper limit value, which is the difference between the actual power generation amounts of
By referring to the operation history of the storage means, foreseeing that the combined power of the power generated by the solar power generation and the power generated by the wind power generation will exceed a reference value, adding a margin to set the second upper limit value,
A power generation control device that controls either power generated by photovoltaic power generation or power generated by wind power generation according to the first upper limit value and the second upper limit value. The power generation control device according to claim 1,
The power generation control device, wherein the magnitude of the margin is determined by the amount and time of excess of the combined power from a reference value. The power generation control device according to claim 1 or claim 2,
The power generation control device, wherein the second upper limit value is determined by taking into account the difference between the amount of power generated by the ideal characteristics of the photovoltaic power generation and the actual amount of power generated by the photovoltaic power generation, and the power due to the communication delay. . The power generation control device according to any one of claims 1 to 3,
The power generation control device, wherein the margin is set to a different value depending on whether the photovoltaic power generation is generating power or not. The power generation control device according to any one of claims 1 to 4,
A power generation control device that detects that a combined power of the power generated by the solar power generation and the power generated by the wind power generation exceeds a reference value, and suppresses and controls the power generated by the wind power generation. The power generation control device according to claim 5,
A power generation control device, wherein the knowledge that the power generated by the wind power generation has been suppressed and controlled is added to the operation history of the storage means. The power generation control device according to any one of claims 1 to 6,
In addition to the past operation history in the renewable energy hybrid power generation system, the storage means stores information including information on the size of the margin as knowledge obtained by learning the operation history or by a statistical method. A power generation control device characterized by: Claims 1 to 4 and Claims in a renewable energy hybrid power generation system in which power generated by photovoltaic power generation and power generated by wind power are combined and supplied to an electric power system via an interconnection point, and which includes a load and storage equipment. Item 8. The power generation control device according to any one of Items 7,
A power generation control device, wherein the first upper limit value controls either the power generated by photovoltaic power generation or the power generated by wind power generation, and the second upper limit value controls the power of the load and the power storage equipment. . The power generation control device according to claim 8,
A power generation control device that detects that a combined power of the power generated by the solar power generation and the power generated by the wind power generation exceeds a reference value, and controls the power storage equipment. The power generation control device according to claim 9,
A power generation control device, wherein the knowledge that the power storage equipment has been controlled is added to the operation history of the storage means. Claims 1 to 4 and 7 of a renewable energy hybrid power generation system in which power generated by photovoltaic power generation and power generated by wind power are combined and supplied to an electric power system via an interconnection point, and are equipped with power storage equipment. The power generation control device according to any one of
The first upper limit value and the second upper limit value control either the power generated by solar power generation or the power generated by wind power generation, and the maximum possible power of the wind power generation facility estimated using the wind speed and the first upper limit and the second upper limit value to control the power storage equipment. A renewable energy hybrid power generation system controlled by the power generation control device according to any one of claims 1 to 11. A power generation control method in a renewable energy hybrid power generation system in which power generated by photovoltaic power generation and power generated by wind power are combined and supplied to a power system via an interconnection point,
A first upper limit value, which is a difference between an interconnection capacity at an interconnection point and an amount of power generation determined by ideal characteristics of photovoltaic power generation, and the ideal photovoltaic power generation system, by storing the past operation history of the renewable energy hybrid power generation system. Classifying into a power generation amount determined by characteristics and a second upper limit value that is the difference between the actual power generation amount of the solar power generation,
With reference to the operation history, foreseeing that the combined power of the power generated by the photovoltaic power generation and the power generated by the wind power generation will exceed a reference value, giving a margin to set the second upper limit value,
A power generation control method, wherein either power generated by photovoltaic power generation or power generated by wind power generation is controlled according to the first upper limit value and the second upper limit value. 14. The power generation control method according to claim 13, in a renewable energy hybrid power generation system in which power generated by photovoltaic power generation and power generated by wind power are synthesized and supplied to the power system via an interconnection point, and which includes a load and storage equipment. There is
A power generation control method, wherein the first upper limit value controls either the power generated by solar power generation or the power generated by wind power generation, and the second upper limit value controls the power of the load and the power storage equipment. . 14. The power generation control method according to claim 13 in a renewable energy hybrid power generation system in which power generated by photovoltaic power generation and power generated by wind power are synthesized and supplied to an electric power system via an interconnection point, and which includes power storage equipment. ,
The first upper limit value and the second upper limit value control either the power generated by solar power generation or the power generated by wind power generation, and the maximum possible power of the wind power generation facility estimated using the wind speed and the first upper limit A power generation control method, comprising: controlling the power storage equipment based on the sum of the value and the second upper limit value.

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