JP2021005912A - Power generation control device, power generation control method and renewable energy hybrid power generation system - Google Patents

Abstract

To provide a power generation control device capable of securing a facility utilization rate of a wind power generation facility without exceeding an interconnection capacity, a power generation control method, and a renewable energy hybrid power generation system.SOLUTION: A power generation control device 11 in a renewable energy hybrid power generation system 100 by power by photovoltaic power generation and by wind power generation, has storage means 17 storing past operation histories in the renewable energy hybrid power generation system, and a hybrid controller 12 determining the power including the wind power generation. The hybrid controller defines a first upper limit value at an interconnection point and a second upper limit value determined by an ideal characteristic of the photovoltaic power generation, refers to the operation histories of the storage means, predicts exceeding of a reference value by the synthetic power by the power of the photovoltaic power generation and the power of the wind power generation, imparts a margin to set the second upper limit value, and controls either one of the power by the photovoltaic power generation or the power by the wind power generation, by the first upper limit value and the second upper limit value.SELECTED DRAWING: Figure 1

Description

The present invention relates to a renewable energy hybrid power generation system provided with 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, 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 limit 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, it is not possible to generate power at night or in bad weather, so the secured interconnection capacity cannot be used up and the capacity factor of the solar power generation equipment is low. 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.

Patent Document 1 states, "A power generation system that supplies power to a commercial power system via a substation, and power is generated by a first power generation facility that generates power by a first energy source and 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 generation by the second power generation facility. The power generation control device is provided with a power generation control device for supplying the combined power generated by the total power generation to the power system, and the power generation control device is provided with a power generation prediction means for predicting the power generation of the first power generation facility. 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 power generation prediction means from the upper limit value set from the interconnection capacity. The upper limit is the combined power generation power obtained by calculating the power limit command value and summing the predicted value of the power generation of the first power generation facility and the calculated limit command value of the power generation in the second power generation facility. It is characterized in that it is determined whether or not the value is exceeded, and when the upper limit value is exceeded, the calculated limit command value is transmitted as an output control signal to the second power generation control device or the second power generation facility. Power generation system to do. "

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 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, but the response speeds of the solar power generation equipment and the wind power generation equipment are different, so the control of the wind power generation equipment cannot be made in time. , 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 power generation control device, a power generation control method, and a renewable energy hybrid power generation system that do not exceed the interconnection capacity and secure the capacity factor of the wind power generation facility.

In order to solve such a problem, in the present invention, it 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 generation are combined and supplied to a power system via an interconnection point. The hybrid controller is equipped with a storage means for storing the past operation history in the renewable energy hybrid power generation system and a hybrid controller for determining the power including wind power generation, and the hybrid controller is ideal for the interconnection capacity at the interconnection point and the photovoltaic power generation. The storage means is divided into a first upper limit value, which is the difference in the amount of power generated determined by the characteristics, and a second upper limit value, which is the difference between the amount of power generated determined by the ideal characteristics of photovoltaic power generation and the actual amount of power generated by photovoltaic power generation. Foreseeing that the combined power of solar power and wind power will exceed the standard value by referring to the operation history of, and adding a margin to make it the second upper limit, the first upper limit and the first It is characterized in that either the power generated by solar power generation or the power generated by wind power generation is controlled by the upper limit value of 2.

Further, the present invention is a renewable energy hybrid power generation system controlled by a power generation control device.

Further, the present invention is 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 generation are combined and supplied to a power system via an interconnection point, and is a renewable energy hybrid power generation system. The first upper limit, which is the difference between the interconnection capacity at the interconnection point and the amount of power generated determined by the ideal characteristics of photovoltaic power generation, and the amount of power generated determined by the ideal characteristics of photovoltaic power generation and the sun. Divide it into the second upper limit, which is the difference between the actual amount of photovoltaic power generation, and refer to the operation history to predict that the combined power of photovoltaic power generation and wind power generation will exceed the standard value. A margin is added to obtain a second upper limit value, and either the power generated by solar power generation or the 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 output suppression value of the solar power or the wind turbine is determined using the operation history, the total power generation of the solar power and the wind turbine can be increased without exceeding the grid interconnection capacity, which is economical. Can be a power plant that does not overwhelm. In addition, it is possible to introduce new power plants even in areas where the free space is zero or very small at present. Further, by maintaining the total output energy amount, heat generation can be suppressed, and hardware such as a power line and a breaker can be prevented from being deteriorated by heat.

The figure which shows the whole composition example of the renewable energy hybrid power generation system which concerns on Example 1. FIG. The figure which shows the detailed configuration example of the hybrid controller 12 which concerns on Example 1. FIG. The figure which shows the image of the wind power generation upper limit value which concerns on Example 1. The figure which shows the example of the power generation area of the wind power generation facility calculated by the formula (1). The figure which shows the power generation possible area of the wind power generation facility 6 when the margin is provided in (PL-Ppv). The block diagram of the margin calculation part which concerns on Example 1. FIG. The flowchart of the calculation process of the margin calculation part which concerns on Example 1. The image figure of the statistical processing in the margin correction part which concerns on Example 1. FIG. The figure which shows an example of the training data. The block diagram of the interconnection capacity excess prevention part which concerns on Example 1. FIG. The flowchart of the arithmetic processing of the interconnection capacity excess prevention part which concerns on Example 1. FIG. The block diagram of the wind power generation output upper limit value calculation part which concerns on Example 1. The behavior image figure of the margin which concerns on Example 1. FIG. The figure which shows the whole composition example of the renewable energy hybrid power generation system which concerns on Example 2. The figure which shows the detailed configuration example of the hybrid controller in Example 2. FIG. The flowchart of the wind power generation output upper limit value calculation part in Example 2. The block diagram of the wind power generation output upper limit value calculation part in Example 2. The figure which shows the whole composition example of the renewable energy hybrid power generation system in Example 3. FIG. The block diagram of the wind power generation output upper limit value calculation part in Example 3.

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

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

The renewable energy hybrid power generation system 100 by solar power generation and wind power generation is connected to the power system 1. The renewable energy hybrid power generation system 100 includes a photovoltaic power generation facility 2, a wind power generation facility 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 at the interconnection point 101. 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 is composed of a solar panel 3 and a solar power conditioner 4. The solar panel 3 can be configured by connecting a plurality of silicon-based solar cells such as a single crystal silicon type, a polycrystalline silicon type, a microcrystal 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 solar cells such as InGaAs, GaAs, and CIS (calcovalite) in series and parallel. Further, in this 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 power conditioner 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 system 1 is limited by the rated output of the photovoltaic power conditioner 4. Further, the photovoltaic power generation power Ppv is measured by the power meter 5.

The wind power generation facility 6 is composed of a wind turbine 7 and a power conditioner 8 for the wind turbine. It has a function of controlling the power generation output by the power conditioner 8 for the wind turbine (power conditioner control) and a function of controlling the power generation output by controlling the angle 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. Further, the amount of power that can be generated is calculated from the rotation speed of the generator and is given to the power conditioner 8 for the wind turbine. Here, the wind turbine power conditioner 8 may be installed under the wind turbine tower. The wind power generation power Pwt output from the wind power generation facility 6 is supplied to the power system 1 and measured by the power meter 9.

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

The power controller 11 has a function for controlling the power so as to improve the capacity factor while suppressing the system power Psys output from the renewable energy hybrid power generation system 100 to the interconnection capacity PL or less, and is a hybrid. It includes a controller 12, a windmill controller 13, a communication network 14 (Internet, etc.), an external controller 15, a terminal 16, and a learning result storage means 17b. In the power controller 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 location away from the renewable energy hybrid power generation system 100. For example, when the operator operates the terminal 16, the hybrid controller 12 can be accessed via the external controller 15 and various setting values required for various controls can be input. Further, for example, the operator can display the state (operating status) 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, but the present invention is not limited to this, and these configurations are the power control device 11. It may be provided externally.

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 power conditioner 4 and the wind turbine power conditioner 8 via a communication network. In this case, the communication connection mode can be set arbitrarily, 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 photovoltaic power conditioner 4. 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 be measured by the wind turbine power conditioner 8. 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 the 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 facility 2 and the wind power generation facility 6 are installed independently, but 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 photovoltaic panels 3, a plurality of solar power conditioners 4 are installed according to the plurality of photovoltaic panels 3. Similarly, a large-scale wind power generation facility 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 of a plurality of wind turbine groups. The method of distributing the upper limit value of wind power generation Pwt_max may be evenly distributed to each wind power generation facility 6, or the ratio may be changed according to the wind condition of each wind power generation facility 6.

The power control in each wind turbine may be an upper limit control that limits the output within this range with respect to the wind power generation upper limit value Pwt_max allocated to the wind power generation facility 6, or the wind power generation upper limit value Pwt_max is a target value. It may be assumed that the feedback control is executed. In the present invention, the output control method in the wind power generation facility 6 is not particularly limited.

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

The operation history data stored in the storage means 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 and excess time from the past interconnection capacity PL and the margin amount at that time, and comparing it with the information on the current excess. Specifically, it will be described later.

Here, the storage means 17 may be held as hardware or may be held on the cloud. Further, the storage means 17 of a plurality of power plants may be linked to calculate the wind power generation upper limit value Pwt_max. If you have the storage means 17 on the cloud, or if you connect the hardware via communication, you can look at the power generation data remotely, and when a problem occurs, you can immediately check the content of the problem and quickly restore the power generation. You can secure profits.

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 includes a storage 121, a photovoltaic power generation waveform creation unit 122 in fine weather, a margin calculation unit 123, a margin correction unit 124, a wind power generation upper limit value calculation unit 125, an interconnection capacity excess prevention unit 128, and a data storage unit 17a. Will be done.

The function of the hybrid controller 12, which will be described in detail below, is basically to output the maximum output of the photovoltaic power generation power Ppv without limiting it, and then for the wind power generation power Pwt, the combined power (system power Psys) is the interconnection capacity PL. 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 countermeasures in three modes are implemented in the present invention. The first aspect M1 is a power generation margin setting process for setting different margins depending on whether power is being generated or not. This process is processed by the margin calculation unit 123, which will be described later.

The second aspect M2 is a predictive margin setting process that predicts and corresponds to an excess of the interconnection capacity PL in the near future with reference to past operation results. This process is processed by the learning result storage means 17b and the margin correction unit 124, which will be described later.

The third aspect M3 is an emergency protective process corresponding to an excess of the interconnection capacity PL that suddenly occurs at the present time, and this process is processed by the interconnection capacity excess prevention unit 128, which will be described later.

Hereinafter, the processing contents of the hybrid controller 12 will be described in detail. First, the storage 121 stores preset value information such as the interconnection capacity PL, the response speed Rpv of the photovoltaic power generation facility 2, the response speed Rwt of the wind power generation facility 6, and the communication delay time Tdelay.

The hybrid controller 12 is measured from these set value 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. The wind power generation upper limit value Pwt_max of the wind power generation facility 6 is calculated by using the measured value information such as the system power Psys.

The photovoltaic 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 by 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 advantage that the algorithm implemented in the controller can be simplified. The photovoltaic power generation output Ppv_f in fine weather is created by utilizing past power generation history data and a database 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.

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

It should be noted that the photovoltaic power generation power Ppv_f in fine weather is equal to or less than the interconnection capacity PL even at the maximum value. Here, the system power Psys, which is a combined output of the photovoltaic power generation power Ppv and the wind power generation power Pwt, is operated so as to be equal to or less than the interconnection capacity PL. Therefore, the difference between the interconnection capacity PL and the actual photovoltaic power generation power Ppv is the power range that the wind power generation 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 grasped by dividing it into two, and for each of the divided differences. Perform monitoring and control from different perspectives. One of the categories is Pwt_max1, which is the difference between the interconnection capacity PL and the photovoltaic power generation power Ppv_f in fine weather, and the other category is the difference between the photovoltaic power generation power Ppv_f in fine weather and the actual photovoltaic power generation power Ppv. There is Pwt_max2.

In FIG. 2, the wind power generation upper limit value calculation unit 125 is composed of a wind power generation upper limit value calculation unit 125A and a wind power generation upper limit value 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 generation power Ppv_f in fine weather, and the wind power generation upper limit calculation unit 125B handles the difference between the photovoltaic power generation power Ppv_f in fine weather. It deals with Pwt_max2, which is the difference between the actual photovoltaic power generation Ppv. The wind power generation upper limit value calculation unit 125A and the wind power generation upper limit value calculation unit 125B differ in the way of handling the difference. Details of the handling of the wind power generation upper limit value calculation unit 125A and the wind power generation upper limit value calculation unit 125B will be described later.

In FIG. 2, the margin calculation unit 123 uses the response speed Rpv of the photovoltaic power generation facility 2 and the response speed Rwt of the wind power generation facility 6 to generate the system power Psys which is the combined output of the photovoltaic power generation facility 2 and the wind power generation facility 6. , Calculate the margin provided in 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 facility 6 so as not to exceed the interconnection capacity PL. Here, the reason for providing the margin is that the response speeds of the photovoltaic power generation facility 2 and the wind power generation facility 6 are different, so that the output suppression of the wind power generation power Pwt cannot be made in time and the interconnection capacity PL is prevented from being exceeded. Is. Here, it is defined by the margin coefficient m = min (Rwt / Rpv, 1).

The process in the margin calculation unit 123 relates to the above-mentioned first aspect M1 and is a process of setting a margin during power generation in which different margins are set depending on whether the 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 excess amount accumulated in the learning result storage means 17b, and sets it as m'.

The processing in the margin correction unit 124 relates to the above-mentioned second aspect M2, and performs the corresponding predictive margin setting processing by predicting the excess of the interconnection capacity PL in the near future with reference to the past operation results. It is a thing. The first aspect M1 and the second aspect M2 will be described in detail later.

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. The wind power generation upper limit value 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 121, and the photovoltaic power generation waveform creation unit 122 in fine weather. The upper limit value of wind power generation Pwt_max is calculated by using the photovoltaic power generation power Ppv_f and the margin m calculated by the margin calculation unit 123 corrected by the margin correction unit m'.

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

The process in the interconnection capacity excess prevention unit 128 relates to the above-mentioned third aspect M3, and is an emergency protective process corresponding to an excess of the interconnection capacity PL that suddenly occurs at the present time. is there. 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 by Pfb output from the interconnection capacity excess prevention unit 128, and is transmitted to the wind turbine controller 13 as a new wind power generation upper limit value Pwt_max. To. As a result, the wind power generation facility 6 is operated according to the wind power generation upper limit value Pwt_max obtained by the wind power generation upper limit value calculation unit 125 within the range not exceeding the interconnection capacity PL.

In addition, 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.

This will be described again with reference to FIG. The area where the wind power generation facility 6 can generate power is (interconnection capacity PL-actual photovoltaic power generation power Ppv), but when the response speed of the wind power generation facility 6 is slower than the response speed of the photovoltaic power generation facility 2, the sun If the photovoltaic power generation power Ppv increases sharply, the output suppression of the wind power generation facility 6 cannot be made in time, and the system power Psys exceeds the interconnection capacity PL. For that purpose, by setting a margin in the wind power generation upper limit value Pwt_max = (interconnection capacity PL-actual photovoltaic power generation), it is possible to prevent the interconnection capacity PL from being exceeded. However, if a margin is set for (coupled capacity PL-actual photovoltaic power generation), the margin near sunrise / sunset, which has a low risk of exceeding the interconnection capacity PL, becomes excessive, and the capacity factor of the wind power generation facility 6 increases. This will lead to a decrease in the amount of electricity sold. On the other hand, the photovoltaic power generation power Ppv of the photovoltaic power generation facility 2 does not exceed the photovoltaic power generation power Ppv_f in fine weather.

In view of this point, in the present invention, the upper limit value of wind power generation 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 generation power Ppv_f in fine weather. In addition, the difference Pwt_max2 (Ppv_f-Ppv) between the photovoltaic power generation power Ppv_f in fine weather and the photovoltaic power generation power Ppv of the photovoltaic power generation facility 2 which may fluctuate depending on the weather is the system power by providing a margin for wind power generation. It is possible to prevent Psys from exceeding the interconnection capacity PL and secure the capacity factor of the wind power generation facility 6.

That is, the wind power generation upper limit value Pwt_max is calculated by the 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 area of the wind power generation facility 6 calculated by the equation (1), and FIG. 4 (b) shows the wind power generation facility 6 when a margin is provided in (PL-Ppv) which is considered to be general. Indicates the power generation area of. Since the margin is provided only for (Ppv_f-Ppv) in FIG. 4 (a), the margin near sunrise and sunset is smaller than that in FIG. 4 (b), and the amount of power sold is increased, so that the interconnection capacity is increased. The capacity factor of the wind power generation facility 6 can be secured without exceeding the limit. On the other hand, in FIG. 4B, since a certain margin is provided for the photovoltaic power generation power Ppv, the capacity factor of the wind power generation facility 6 is lowered.

FIG. 5 shows a block diagram of the margin calculation unit 123. The margin coefficient m is calculated using the photovoltaic power generation Ppv, the response speed Rpv of the photovoltaic power generation facility 2, and the response speed Rwt of the wind power generation facility 6.

FIG. 6 shows a flowchart of arithmetic processing of the margin calculation unit 123. Since it is only necessary to provide a margin during power generation by the photovoltaic power generation facility 2, it is necessary to detect during power generation. While the photovoltaic power generation facility 2 is not generating power, the upper limit of wind power generation and the interconnection capacity PL match (Pwt_max = PL) and are not likely to fluctuate, so no margin is required.

Therefore, in the flow of FIG. 6, when the photovoltaic power generation 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 calculation is performed with a margin m = Rwt / Rpv (process step S11). 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, when Ppv ≦ 0, it is determined that the photovoltaic power generation facility 2 is not generating power, and the margin coefficient m = 1 is set (processing step S13). That is, it can be defined by m = min (Rwt / Rpv, 1). This time, as an example of the margin calculation method, (Ppv_f-Ppv) × m is used, but (Ppv_f-Ppv) -m may be used.

The above processing in the margin calculation unit 123 relates to the first aspect M1 in which the margin setting processing during power generation for setting different margins is performed depending on whether the power generation is in progress or not. As a result of distinguishing between the case of power generation and the case of not power generation, in many cases, the nighttime and the daytime are distinguished, or the cloudy weather and the rainy weather where power generation is not possible or not possible are distinguished from the fine weather. Further, 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 value of a certain margin when power is not being generated may include no margin.

FIG. 7 shows an image of statistical processing in the margin correction unit 124. The horizontal axis of the graph shows the excess duration from the interconnection capacity PL × the excess power amount from the interconnection capacity PL, and the vertical axis shows 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 the excess power amount is large. Therefore, in case 1 where the excess duration is short and the excess power amount is small, the margin amount is small, and in case 2 where the excess duration is long and the excess power amount is large, the margin amount is large. .. Furthermore, in case 3 where the excess duration and the excess power amount are intermediate, such as an excess with a long excess duration and a small excess power amount, or a short excess duration and a large excess power amount, the excess power amount is small. It is preferable to adopt an intermediate measure such as giving a margin for a long time or giving a large margin for a short time. In order to prevent deterioration of power lines and circuit breakers due to heat, it is desirable to manage by multiplying the excess duration x the excess power amount (energy amount, Wh) in this way.

In the statistical processing of the margin correction unit 124, regarding the interconnection capacity PL when determining the excess duration 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 100%, it is preferable to set the value to 80% or 90%. That is, it means a reference value set for 100% interconnection capacity PL. This is because it is not permissible to exceed 100% of the interconnection capacity PL in the actual operation of the power system. In the present specification, a reference value which is a value of 80% or 90% set for a 100% interconnection capacity PL is treated as an interconnection capacity PL, and an excess from this is monitored.

In the statistical processing in the margin correction unit 124, learning processing utilizing the history information in the past operation is performed. When comparing the knowledge obtained by this learning with the current weather, we predict the weather fluctuations that may occur in the near future, or even the power fluctuations, and in that prediction, the excess (time and amount) from the interconnection capacity PL. ) By analogy. Further, the history information in 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 from the interconnection capacity PL in this case is determined based on the above-mentioned reference value.

For this reason, in the configuration of FIG. 1, history information and the like in the past operation are recorded in the storage means unit 17. These are, for example, the following statistical data created and accumulated in addition to the time-series data of photovoltaic power generation power Ppv, wind power generation power Pwt, and system power Psys. Here, as the statistical data, various formats such as a histogram and a scatter diagram can be considered, and these can be used in an appropriate format in the present invention.

In FIG. 2, which shows a detailed configuration example of the hybrid controller 12, the storage means unit 17 is a data storage unit 17a that stores the measured data, and statistics obtained as a result of statistical processing and learning processing using the measured data. It is described separately 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 the statistical data of the correlation between the weather, the deviation amount (kW), and the deviation time (s), and the horizontal axis is the weather and the vertical axis is the deviation. It describes the quantity (kW) and the deviation time (s). Another example is statistical data showing the correlation between the season (month), the amount of deviation (kW), and the deviation time (s). The horizontal axis is the month, the vertical axis is the amount of deviation (kW), and the deviation. It describes the time (s). Another example is statistical data of the correlation between time, deviation amount (kW), and deviation time (s). The horizontal axis is time, and the vertical axis is deviation amount (kW) and deviation time (s). ) Is described. Here, the learning data includes statistical data.

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

FIG. 8 shows an example of learning data. For example, when it is sunny, there is little sudden change, and the deviation amount, deviation time, and correction margin amount tend to be small, and when a cloud is applied and the deviation suddenly decreases, the deviation amount is large, the deviation time is small, and the correction margin amount is medium. It is a finding that shows a tendency to become. When it is cloudy, if the power generation is small, the deviation amount, deviation time, and correction margin amount tend to be small, and if the power generation is not restored for a while, the deviation amount is small, the deviation time is large, and the correction margin amount is medium. It is a finding. Although the description of the situation of the learning data in FIG. 8 is omitted one by one, the tendency in the case where the clouds become clear or in the spring, summer, autumn and winter is accumulated as the learning data in the same manner below.

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

FIG. 9 shows a block diagram of the interconnection capacity excess prevention unit 128. The interconnection capacity excess prevention unit 128 includes an interconnection capacity excess detection unit 1281 and a wind turbine upper limit correction amount calculation unit 1282. The interconnection capacity excess detection unit 1281 compares the system power Psys with the interconnection capacity PL, and when it is determined that the interconnection capacity is exceeded, the wind turbine upper limit correction amount calculation unit 1242 calculates the correction coefficient Pfb. The correction coefficient Pfb is calculated by, for example, | PL-Psys |. On the other hand, when it is determined that the excess is not exceeded, Pfb = 0. The excess of the interconnection capacity in this case is determined 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 as not to exceed the interconnection capacity any more. (Processing step S22) After that, if the period of Psys <PL continues for a certain period of time (processing step S23), the processing ends. On the other hand, when Psys> PL, the process returns to the processing step S22 again.

The actual excess scene in the interconnection capacity excess prevention unit 128 is reflected in the learning result storage means 17b described above. As a result, once the system power Psys exceeds 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. , It is possible to prevent the excess again.

The process in the interconnection capacity excess prevention unit 128 relates to the above-mentioned third aspect M3, and is an emergency protective process corresponding to 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 value calculation unit 125. Of these, the wind power generation upper limit value calculation unit 125A takes the difference between the interconnection capacity PL and the photovoltaic power generation power Ppv_f in fine weather and sets it as Pwt_max1 (Pwt_max1 = PL-Ppv_f).

Further, in the wind power generation upper limit value calculation unit 125B, the result of further subtracting the multiplication result of the communication delay time Tdelay and the response speed Rpv of the photovoltaic power generation facility 2 from the difference between the photovoltaic power generation power Ppv_f and the photovoltaic power generation power Ppv in fine weather. Is multiplied by the margin coefficient m'to obtain 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 upper limit of wind power generation 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 facility 6 can be improved.

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

Of these, the response delay represents the difference between the rate of change in which the solar output suddenly increases and the rate at which the wind turbine output is suppressed, for example, when solar power is mainly generated. This shall include the mechanical delay of the wind turbine such as pitch control. On the other hand, the communication delay represents the time required for the control controller to acquire the data of the measuring instrument (wattmeter), calculate the command value, and send it to the wind turbine. Including the communication delay countermeasure margin, Pwt_max2 shown in FIG. 3 becomes as in the above-described equation (2).

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

In this embodiment, the control target is the wind power generation facility 6, but if the FIT unit price is cheaper for the solar power generation facility 2, the control target is switched to the solar power generation facility 2, and the control target is set according to the FIT unit price. 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 shows the time of day and the vertical axis shows the power, and the relationship between the interconnection capacity PL and the variable margin m is shown. It shows that the margin m is variably operated during the daytime when the photovoltaic power generation facility 2 operates. In reality, the variable width of the margin m tends to decrease during the start and stop times of the photovoltaic power generation facility 2 in the morning and evening.

Since the margin is variable when the method of the first embodiment is used, the capacity factor is improved as compared with the case where the margin is constant.

The equipment of Example 1 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 generation are combined and supplied to a power system via an interconnection point. It is equipped with a storage means that stores the past operation history of the possible energy hybrid power generation system and a hybrid controller that determines the power including wind power generation, and the hybrid controller is determined by the interconnection capacity at the interconnection point and the ideal characteristics of photovoltaic power generation. The operation history of the storage means is divided into the first upper limit value, which is the difference in the amount of power generation, and the second upper limit value, which is the difference between the power generation amount determined by the ideal characteristics of photovoltaic power generation and the actual power generation amount of photovoltaic power generation. Foreseeing that the combined power of photovoltaic power generation and wind power generation will exceed the standard value, a margin is added to make the second upper limit value, and the first upper limit value and the second upper limit value are set. It is configured as a power generation control device or a renewable energy hybrid power generation system characterized by controlling either the power generated by photovoltaic power generation or the power generated by wind power generation according to the upper limit value of.

In Example 1, a method of observing the interconnection capacity PL by coordinating between power supply facilities has been described. On the other hand, in the second embodiment, when a load and a power storage device are further provided, a method of observing the interconnection capacity PL by coordinating the load and the power storage device and the wind power generation facility will be described.

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

Of these, the power storage device 18 is composed of a storage battery power conditioner 19 and a storage battery 20. The DC charge / discharge power output from the storage battery 20 is converted into AC charge / discharge power Pbat by the storage battery power conditioner 19 and output to the power system 1. The storage battery power conditioner 19, the above-mentioned solar power conditioner 4, and the wind turbine power conditioner 8 may be referred to as a grid-connected inverter.

The storage battery 20 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 20 from the power storage device 18 in addition to the information from the photovoltaic power generation facility 2 and the wind power generation facility 6, and transmits the charge / discharge power Pbat to the power conditioner 19 for the storage battery. Here, the power storage device 18 shows the storage battery 20 as an example, but since a device capable of storing energy such as pumped storage power generation, a fuel cell, and hydrogen can be substituted, the energy storage device 18 is not limited to the power storage device 18.

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 a system output Psys which is a combined output of the photovoltaic power generation facility 2 and the wind power generation facility 6. It covers and discharges the insufficient power from the power storage device 17. Further, when the surplus electric power of the demand is generated, the power storage device 17 is charged so that the interconnection capacity PL of the electric power system is not exceeded and the capacity factor 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: generally charged amount) 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 Load * are added to the output from the hybrid controller 12. Is the added point.

With this 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 facility 6 until the SOC reaches the upper limit, and when the SOC reaches the upper limit, the wind power generation facility Suppress the power of 6. Here, the photovoltaic power generation facility 2 may suppress the generated power, and the power generation facility having a high unit selling price is preferentially generated.

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

On the other hand, the surplus power calculation unit 125C in the wind power generation upper limit value calculation unit 125 sets the wind power generation upper limit value Pwt_max2 for the wind power generation facility 6 calculated by the wind power generation upper limit value calculation unit 125B of the first embodiment to the load power for the load. It functions to give as a target value Pland *. As a result, even in the second embodiment, the functions of the first aspect M1 and the second aspect M2 are provided.

Further, 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 aspect M3. Specifically, when the interconnection capacity excess prevention unit 128 detects an excess of the system power Psys from the interconnection capacity PL, the charge / discharge power Pbat is calculated in consideration of the correction coefficient Pfb so that no further excess occurs. To do. As a result, the maximum amount of wind power generation power Pwt can be sold.

FIG. 15 shows an example of a flowchart of arithmetic processing of the surplus power calculation unit 125C in the wind power generation upper limit value calculation unit 125. First, the sum of the photovoltaic power generation power Ppv and the wind power generation power Pwt and the magnitude relationship of the interconnection capacity PL are compared (processing step S31). When Ppv + Pwt> PL, the magnitude relationship between the surplus power (PL− (Ppv + Pwt)) and the load power Plane is compared (processing step S32).

When Pland> PL- (Ppv + Pwt), the surplus power PL- (Ppv + Pwt) is consumed by the load (processing step S33). On the other hand, in the case of Proad <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 facility 6 is suppressed (processing step S34). As a result, the power that should have been suppressed in output can be used for load consumption, so that 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 value calculation unit 125 in the second embodiment. First, the difference (PL-Ppv_f) between the interconnection capacity PL, which is a component that does not change regardless of the weather, and the photovoltaic power generation output Ppv_f in fine weather is defined as the wind power generation upper limit value Pwt_max of the wind power generation facility 6.

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

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

As described above, in the photovoltaic power generation hybrid power generation system 100, the capacity factor of the wind power generation equipment 6 is improved without exceeding the interconnection capacity PL of the power system.

The equipment of the second embodiment described above includes the equipment of the first embodiment, "the electric power generated by solar power generation and the electric power generated by wind power generation are combined and supplied to the electric power system through the interconnection point, and also provided with a load and a power storage facility. A power generation control device in a renewable energy hybrid power generation system, in which either the power generated by solar power generation or the power generated by wind power is controlled by the first upper limit value, and the load power and power storage equipment are controlled by the second upper limit value. It is configured as a power generation control device or a renewable energy hybrid power generation system characterized by being controlled.

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

FIG. 17 is a block diagram showing the overall configuration of the renewable energy hybrid power generation system according to the third embodiment 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 from the anemometer 22, the maximum possible power Pwt_e, which is the power before the suppression of the wind power generation facility 6, can be estimated. Therefore, if the power generation of the wind power generation facility 6 is prioritized and the wind power generation power Pwt of the wind power generation facility 6 is not suppressed, the power storage device 18 is charged only when the system power Psys exceeds the interconnection capacity PL. , The facility utilization rate of the wind power generation facility 6 can be improved.

FIG. 18 shows a block diagram of the wind power generation upper limit value calculation unit 125 in the third embodiment. In the configuration of FIG. 18, the wind power generation upper limit value calculation units 125A and 125B are provided, and Pwt_max (= Pwt_max1 + Pwt_max2) is given as one input of the correction unit 1313. Further, as the other input of the correction unit 1313, the coefficient Pfb for correcting the upper limit value Pwt_max of the wind power generation from the interconnection capacity excess prevention unit 128 is input, and finally Pwt_max is determined and given to the wind power generation facility 6. .. Therefore, the configurations up to this point show the same control contents as in the first embodiment.

In addition, the wind power generation upper limit value 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 estimation unit 1312 uses the wind speed Vwt as the input value to calculate the maximum possible power Pwt_e of the wind power generation facility 6.

When the electric power charged in the power storage device 18 is discharged by the control in such a configuration, the electric power is reduced due to the charge / discharge loss. Therefore, the maximum utilization of the wind power generation equipment 6 leads to the improvement of the capacity factor. Therefore, similarly to the first embodiment, the wind power generation upper limit value Pwt_max is calculated, and the difference between the possible maximum power Pwt_e of the wind power generation facility 6 and the wind power generation upper limit value Pwt_max calculated by the possible maximum output estimation unit 1312 is transmitted to the power storage device 18. Charge.

Based on the above, the solar wind power hybrid power generation system 102 calculates the maximum possible power Pwt_e of the wind power generation facility 6 based on the wind speed Vwt measured by the wind speed meter 22, thereby generating the wind power generation facility 6 to the maximum extent and wind power. By charging the power storage device 18 only when it is necessary to suppress the generated power Pwt, the equipment utilization rate is improved without exceeding the interconnection capacity PL of the power system.

Although the hybrid system of the solar power generation facility 2 and the wind power generation facility 6 has been described in the above-mentioned Example 3, the hybrid system is not limited to solar power and wind power, and two or more types of power generation facilities may be combined.

In the first embodiment, the equipment of the child Example 3 is "a renewable energy hybrid power generation equipped with a power storage facility as well as a combination of power generated by solar power generation and power generated by wind power generation and supplied to the power system via an interconnection point. It is a power generation control device in the system, and it is possible to control either the power generated by solar power generation or the power generated by wind power generation by the first upper limit value and the second upper limit value, and to estimate the wind power generation equipment using the wind speed. It is configured like a power generation control device or a renewable energy hybrid power generation system characterized by controlling a power storage facility from the sum of the maximum power, the first upper limit value, and the second upper limit value.

1: Power system 2: Photovoltaic power generation equipment 3: Photovoltaic panel 4: Photovoltaic power conditioners 5, 9, 10: Power meter 6: Wind power generation equipment 7: Wind turbine 8: Power conditioner for wind turbine 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: Power conditioner for storage battery 20: Storage battery 21: Load 22: Wind speed meter 121: Storage 122: Fine weather Photovoltaic power generation waveform creation unit 123: Margin calculation unit 124: Margin correction unit 125, 125a, 125b: Wind power generation upper limit value calculation unit 128: Interconnection capacity excess prevention unit 17a: Data storage unit 17b: Learning result storage means 125c: Surplus power calculation unit 100: Photovoltaic wind hybrid power generation system

Claims (15)

It is 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 generation are combined and supplied to the power system via an interconnection point.
Equipped with a storage means for storing past operation history in a renewable energy hybrid power generation system and a hybrid controller for determining power including wind power generation.
The hybrid controller has a first upper limit value which is a difference between the interconnection capacity at the interconnection point and the amount of power generation determined by the ideal characteristics of photovoltaic power generation, the amount of power generation determined by the ideal characteristics of photovoltaic power generation, and the photovoltaic power generation. It is divided into the second upper limit value, which is the difference in the actual power generation amount of
With reference to the operation history of the storage means, it is predicted that the combined power of the power generated by the solar power generation and the power generated by the wind power generation will exceed the reference value, and a margin is added to set the second upper limit value.
A power generation control device characterized in that either power generated by photovoltaic power generation or power generated by wind power generation is controlled by the first upper limit value and the second upper limit value. The power generation control device according to claim 1.
A power generation control device characterized in that the size of the margin is determined by an excess amount and an excess time from the reference value of the combined electric power. The power generation control device according to claim 1 or 2.
The second upper limit value is determined by adding the power due to the communication delay to 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. .. The power generation control device according to any one of claims 1 to 3.
The power generation control device is characterized in that the margin is set to a different value depending on whether the photovoltaic power generation is during power generation or not. The power generation control device according to any one of claims 1 to 4.
A power generation control device characterized in that it detects that the 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 characterized in that the knowledge that the electric power generated by the wind power generation is 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 the operation history 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 being present. 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 generation are combined and supplied to a power system via an interconnection point, and also equipped with a load and a power storage facility. Item 5. The power generation control device according to any one of Item 7.
A power generation control device characterized in that either the power generated by photovoltaic power generation or the power generated by wind power is controlled by the first upper limit value, and the power of the load and the power storage facility are controlled by the second upper limit value. .. The power generation control device according to claim 8.
A power generation control device characterized in that it detects that the 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 facility. The power generation control device according to claim 9.
A power generation control device characterized in that the knowledge of controlling the power storage facility is added to the operation history of the storage means. Claims 1 to 4 and 7 in a renewable energy hybrid power generation system in which power generated by solar power generation and power generated by wind power generation are combined and supplied to an electric power system via an interconnection point, and also have a power storage facility. The power generation control device according to any one of the above items.
The first upper limit value and the second upper limit value control either the power generated by photovoltaic 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 device characterized in that the power storage facility is controlled from the sum of the value and the second upper limit value. A renewable energy hybrid power generation system controlled by the power generation control device according to any one of claims 1 to 11. It is a power generation control method in a renewable energy hybrid power generation system in which power generated by solar power generation and power generated by wind power generation are combined and supplied to the power system via an interconnection point.
The first upper limit, which 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 ideal of the photovoltaic power generation, which stores the past operation history of the renewable energy hybrid power generation system. It is divided into the second upper limit, which is the difference between the amount of power generated determined by the characteristics and the actual amount of power generated by the photovoltaic power generation.
With reference to the operation history, it is predicted that the combined power of the power generated by the solar power generation and the power generated by the wind power generation will exceed the reference value, and a margin is added to set the second upper limit value.
A power generation control method characterized in that 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. The power generation control method according to claim 13, wherein the power generated by photovoltaic power generation and the power generated by wind power generation are combined and supplied to the power system via an interconnection point, and the renewable energy hybrid power generation system including a load and a power storage facility is provided. There,
A power generation control method characterized in that either the electric power generated by photovoltaic power generation or the electric power generated by wind power generation is controlled by the first upper limit value, and the electric power of the load and the power storage facility are controlled by the second upper limit value. .. The power generation control method according to claim 13, wherein the power generated by solar power generation and the power generated by wind power generation are combined and supplied to the power system via an interconnection point, and the renewable energy hybrid power generation system provided with a power storage facility. ,
The first upper limit value and the second upper limit value control either the power generated by photovoltaic 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 characterized in that the power storage facility is controlled from the sum of the value and the second upper limit value.

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