JP5878095B2 - Power generation system, power generation fluctuation compensation system - Google Patents

Description

  The present invention relates to a power generation fluctuation complementation system that performs complementation corresponding to output fluctuation of solar power generation.

  In recent years, various distributed power sources such as solar power generation, wind power generation, fuel cells, and power generation gas engines have been put into practical use and introduced. Adopting such a distributed power source as an in-house power generation facility in a building can be expected to reduce greenhouse gas emissions, reduce the amount of power supplied by power companies, or in the event of an earthquake or fire There are various advantages that it is easy to ensure self-supporting stability. Therefore, it is expected that power supply systems using distributed power sources will be widely used in the future.

  Solar power generation is an example of renewable energy-based power generation. As is well known, the amount of power generated by such renewable energy-based power generation depends on the amount of sunlight, and output fluctuations that cannot be controlled occur.

  In addition, a gas engine is an engine which drives a combustible gas as a fuel. The power generation gas engine is a private power generation facility that generates power using the gas engine. The gas appliances and equipment are often used in cogeneration systems that generate heat and electricity, and most of them are based on the same principle as gasoline engines for automobiles.

  The series of steps is as follows. 1. Fuel gas and air are mixed and supplied into the cylinder (combustion chamber) in advance. The air-fuel mixture is compressed by a piston and ignited by electric sparks. 3. The air-fuel mixture after combustion (= combustion gas) expands and pushes down the piston. 4). Finally, the combustion gas is discharged from the cylinder by the piston. When the piston is lowered during the third expansion step, the outside work is performed (converted into a rotational force through the crank mechanism), and the connected generator is rotated to generate power. In addition to commercial and industrial applications, it is used as a gas cogeneration system for homes that can generate electricity with city gas, make hot water using the heat generated, and heat it.

In addition to this, there is a gas turbine as the power of cogeneration.
A fuel cell is a battery that generates electricity by chemically reacting hydrogen and oxygen. Unlike a normal battery, it can continuously generate power by continuously supplying hydrogen and oxygen.

  By the way, in the power supply system using the above distributed power source, when the distributed power source and the commercial system (power network of a large power company) are used together (system interconnection) and the distributed power source is operated, Output fluctuations may affect commercial systems. In particular, when solar power generation, which is expected to be introduced in large quantities in the future, will be incorporated into a power supply system using distributed power sources, the output of solar power generation will fluctuate depending on the amount of solar radiation, and the balance between power demand and supply will be disrupted. Frequency fluctuations may occur on commercial systems.

  Since there are machines that move depending on the numerical value of the frequency, it is generally not preferable that a frequency fluctuation of ± 0.2 Hz or more occurs in a 50 Hz system. In addition, if only a power company is required to compensate for load fluctuations in a commercial system, a large burden is placed on the power company's ability to adjust load fluctuations.

  Therefore, in recent years, it has been demanded to operate the distributed power supply individually following the load, and in particular, when solar power generation is introduced, to operate so as to suppress the output fluctuation. If it does in this way, the burden on the electric power company side of load fluctuation control concerning a commercial system can be reduced.

Further, for example, conventional techniques described in Patent Documents 1 to 4 are known.
Patent Document 1 discloses that an output fluctuation of a solar power generation device is absorbed by an engine cogeneration system using a gas engine using natural gas or the like as fuel and charging / discharging of a power storage device. The invention of Patent Document 1 improves the responsiveness corresponding to the output fluctuation of the solar power generation apparatus, appropriately absorbs the output fluctuation of the solar power generation apparatus, and can prevent a decrease in power generation efficiency. Is to provide. For example, for a short time photovoltaic power generation output fluctuation that cannot be absorbed by engine output control, the charge / discharge amount of the power storage device is controlled so as to appropriately compensate for this fluctuation.

  In the invention of Patent Document 2, the predicted power generation amount can be calculated from the cloud rate above the solar cell, and the power generation amount of the generator (engine or the like) can be instructed in advance. By being able to instruct in advance, it is possible to cope with a sudden change in the amount of power generated by the solar cell by supplying power from the generator and the storage battery, and it is possible to improve the independence stability in a single system.

  In addition, the invention of Patent Document 3 provides a control system for a new energy power plant group that can appropriately control the power system even when the output of the new energy power plant suddenly changes due to a sudden change in weather conditions or a system disruption. It is to provide.

  The invention of Patent Document 4 relates to a system that uses a power storage device such as a secondary battery in order to stabilize the power applied to the power system from a wind power generator or the like, and the operating state reaches the upper and lower limits of the allowable operating range. In such a case, the time when the operation state is stuck to the upper and lower limits of the allowable operation range and power compensation cannot be performed can be shortened.

JP 2012-85468 A JP 2011-211877 A JP2012-5310A JP 2007-306669 A

  Here, the power generation gas engine has a minimum output, and is operated within a range from the minimum output to the maximum output (rated output). If the minimum output is 50%, the operation is performed within the range of output 50% to 100%. For this reason, when a power generation gas engine is used to compensate for the output fluctuation of photovoltaic power generation, the supplementary amount is not “0”, and the minimum output (= 50%) is at least the photovoltaic power generation. Output fluctuation compensation is performed by adding to the quantity. The output = 50% is a percentage of the rated output and means an output value that is half of the rated output.

  Further, the control unit of the power generation gas engine may change the amount of photovoltaic power generation from the base with respect to, for example, a predetermined reference output (for example, 75% which is between 50% and 100%). The power generation gas engine output value is determined and controlled by adding and subtracting the minute. For this reason, it is good if the amount of fluctuation in the amount of photovoltaic power generation is within the range of the upper and lower limits of the gas engine for power generation (here, in the range of 50% to 100%). The gas engine output value will stick to the upper limit value or the lower limit value, and normal output fluctuation compensation cannot be realized.

  In response to this problem, for example, if a power generation gas engine with a large rated output (maximum output) is used, the above problem can be prevented or reduced, but the rated output is used only to absorb fluctuations in photovoltaic power generation. It is actually difficult to use a power generation gas engine having a large value from the viewpoint of cost and the like.

  An object of the present invention is to adjust the power generation amount of a fuel power generation facility using an appropriate base output value according to the weather, time zone, etc., in a system that complements the output fluctuation of solar power generation by the power generation output of the fuel power generation facility. A power generation system that can control and thus reduce the possibility that the power generation amount of the fuel power generation facility sticks to the upper limit value or the lower limit value, and can realize appropriate output fluctuation compensation, and the power generation fluctuation compensation system Etc. are provided.

The power generation system of the present invention is a power generation system having a solar power generation device and a fuel power generation facility. The power generation system acquires the generated power value of the solar power generation device as needed, and the fuel power generation facility based on the acquired power generation value. A power generation fluctuation compensation system for controlling the amount of power generated by the power generation fluctuation compensation system, wherein the power generation fluctuation compensation system includes a short-term fluctuation component of the acquired power generated by the solar power generation apparatus, a base output value related to the fuel power generation facility, and A fuel power generation command value determining means for determining a power generation amount command value of the fuel power generation facility based on the sum of the fuel power generation facility and outputting it to the fuel power generation facility; and determining the fuel power generation command value by determining the base output value as needed Base output setting means for outputting to the means, wherein the base output setting means is a base output which is time series setting data of the base output value corresponding to each time or time zone of one day Using the base output value pattern storage means in which the value pattern is stored in advance and the base output value pattern stored in the base output value pattern storage means, a base output value corresponding to the current time or time zone is obtained. Base output means for outputting to the fuel power generation command value determining means.

Alternatively, the power generation system according to the present invention is a power generation system including a solar power generation device and a fuel power generation facility. The power generation value of the solar power generation device is acquired as needed, and the fuel is generated based on the acquired power generation value. A power generation fluctuation compensation system for controlling the power generation amount of the power generation equipment, the power generation fluctuation compensation system comprising a short-term fluctuation component of the obtained power generation power of the solar power generation apparatus and a base output related to the fuel power generation equipment; A fuel power generation command value determining means for determining a command value of the power generation amount of the fuel power generation facility based on the sum of the values and outputting the command value to the fuel power generation facility; and a base output setting means for outputting to the value determination means, wherein the base output setting means is a series configuration data when the base output value corresponding to each time or times of the day Base output value pattern storage means for storing a plurality of types of source output value patterns corresponding to each weather, weather forecast information acquisition means for acquiring weather forecast information, and storage in the base output value pattern storage means Base output value pattern selecting means for selecting a base output value pattern corresponding to the weather of the weather forecast acquired by the weather forecast information acquiring means from among the plurality of base output value patterns corresponding to each weather being And a base output means for outputting a base output value corresponding to the current time or time zone to the fuel power generation command value determining means using the base output value pattern selected by the base output value pattern selecting means.

  In each of the above power generation systems, for example, the fuel power generation command value determining means includes a filter unit that removes a short-cycle fluctuation component of the generated power value of the acquired solar power generation device, and the acquired solar power from the output of the filter unit. A subtracter for subtracting the generated power value of the photovoltaic power generation device; and an adder for adding the base output value to the output of the subtractor; and the output of the adder is used as a command value for the power generation amount of the fuel power generation facility. To the fuel power generation facility.

  The base output value used by the fuel power generation command value determining means having such a configuration is not fixed but is determined and input as needed by the base output setting means. The base output value according to the time zone or the like, or the base output value according to the weather and the time zone, etc. is determined and inputted as needed. As a result, for example, a situation in which the power generation amount of the fuel power generation facility sticks to the lower limit value / upper limit value can be suppressed.

  According to the power generation system of the present invention, its power generation fluctuation compensation system, etc., in a system that supplements the output fluctuation of solar power generation with the power generation output of the fuel power generation facility, an appropriate base output value is used according to the weather, time zone, etc. Therefore, the power generation amount of the fuel power generation facility can be adjusted and controlled, thereby reducing the possibility of the power generation amount of the fuel power generation facility sticking to the upper limit value or the lower limit value and appropriately compensating for output fluctuations. realizable.

It is a block diagram of the power generation fluctuation complementation system of this example. It is a schematic structure figure of the whole power generation system. (A)-(e) is an example of input / output of each structure shown in FIG. (A), (b) shows the amount of solar radiation, (c), (d) shows an example of photovoltaic power generation fluctuation, and (e) shows an image of complementation by a gas engine for fluctuations in photovoltaic power generation. It is a process flowchart figure of a GE base output setting part. (A)-(c) is a figure which shows an example (the 1) of a GE base output value pattern. (A)-(c) is a figure which shows an example (the 2) of a GE base output value pattern. (A)-(c) is a figure which shows an example of the electric power generation amount of the solar power generation according to the weather, and an example of the GE base output value pattern according to it. It is an example of an input setting screen.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram of the power generation fluctuation compensation system of this example.
The power generation fluctuation compensating system 1 in the illustrated example includes a GE command value determining unit 10 and a GE base output setting unit 20. The GE command value determination unit 10 itself may be regarded as an existing configuration that has existed conventionally, and in this method, a GE base output setting unit 20 is newly added.

  Note that the power generation system as a whole includes, for example, a gas engine power generation device 2 and a solar power generation device 3 as shown in FIG. 2, and these generated power is applied to a power system 4 (commercial system, etc.) or a load (not shown). It is a configuration to be supplied. As shown in FIG. 2, the power generation fluctuation complementing system 1 is connected to the gas engine power generation device 2 and the solar power generation device 3, and can at least acquire the generated power of the solar power generation device 3 in real time. It has a configuration. Then, the power generation fluctuation compensation system 1 adjusts / controls the power generation amount of the gas engine power generation device 2 based on the acquired photovoltaic power generation power value. Further, the power generation fluctuation complementing system 1 can communicate with an arbitrary website via a network such as the Internet, and can acquire weather forecast information and the like to be described later.

  The gas engine power generation device 2 is an example of a fuel power generation facility. The fuel power generation facility is a device that generates power by burning some kind of fuel, and is not limited to the gas engine power generation device 2, but may be, for example, a gas turbine power generation facility or a diesel engine power generation facility.

First, the GE command value determination unit 10 will be briefly described (because of the existing configuration).
The GE command value determination unit 10 includes a PV generated power input unit 11 that inputs the generated power value of the solar power generation device 3 in real time, a filter 12, a subtractor 13, an adder 14, and the like.

  The generated power value of the solar power generation device 3 input by the PV generated power input unit 11 is input to the filter 12 and is input to the minus side of the subtractor 13. The filter 12 is, for example, a low-pass filter. For example, when generated power as shown in FIG. 3A is input, the short-cycle fluctuation component is cut (removed), for example, FIG. Only medium- and long-term fluctuation components as shown in b) are generated and output.

  The output of the filter 12 is input to the + side of the subtractor 13. Thus, the subtractor 13 extracts the difference between the two in the form in which the photovoltaic power is subtracted from the mid-long term fluctuation component. That is, the mid-long term fluctuation component is cut, and the positive / negative inversion value of the short-term fluctuation component is extracted.

FIG. 3C shows an output example of the subtracter 13 corresponding to the examples of FIGS. 3A and 3B.
Here, the example shown in FIG. 3A is an example of solar power generation in the morning on a sunny day, and as a short-term fluctuation, the increase and decrease are repeated many times. Since the amount of sunlight tends to increase, medium- to long-term fluctuation components as shown by dotted lines in the figure increase. For this reason, when the increase amount and the decrease amount in the short-term fluctuation are compared, the fluctuation amount of the increase becomes larger, and this is input to the minus side of the subtractor 13, which is shown in FIG. As described above, the output of the subtractor 13 has a larger amount of fluctuation of the decrease.

  On the other hand, although not shown in particular, since the amount of sunlight decreases this time on a sunny afternoon (especially late afternoon; a time zone close to the evening, etc.), the output of the subtractor 13 is as described above. Conversely, the amount of change in the increase is greater.

  The output of the subtracter 13 is input to the adder 14. The adder 14 also receives the GE base output value, and outputs the addition result (output of the subtractor 13 + GE base output value) to the gas engine power generator 2 as an output command value of the gas engine power generator 2. become.

  Here, the GE base output value is a previously set fixed value. If the lower limit value of the output of the gas engine power generator 2 is 50% (note that the upper limit value (rated value) is naturally 100%), for example, when the GE base output value is set to 85%, The output (gas engine output command value) of the adder 14 is as shown in FIG. In this example, as shown in FIG. 5 (c), the amount of increase is small and the amount of decrease is large. Therefore, as shown in FIG. 3 (d), the command value corresponding to the increase is the upper limit. The value never reaches the upper limit (does not stick to the upper limit), and the command value corresponding to the change in the decrease does not reach the lower limit (does not stick to the lower limit).

  For example, sticking to the lower limit value means that the lower limit value becomes constant (because it cannot be less than the lower limit value). Further, for example, the above 50% means an output that is half the rated output value (output 100%). That is, the output is expressed as a percentage of the rated value (this is the same for the above 85%, 60% described later, etc.).

  Although not particularly illustrated, a configuration for further limiting the upper limit value and the lower limit value may be provided after the adder 14. That is, when the output of the adder 14 exceeds a predetermined upper limit value, the upper limit value is output to the gas engine power generator 2 as the command value (sticks to the upper limit value). Similarly, when the output of the adder 14 becomes equal to or less than a predetermined lower limit value, the lower limit value is output to the gas engine power generator 2 as the command value (sticks to the lower limit value). However, the configuration is not limited to such an example, and the output of the adder 14 may be output to the gas engine power generator 2 as it is.

  On the other hand, if the GE base output value is set to 60%, the output of the adder 14 (gas engine output command value) is, for example, as shown in FIG. That is, in this example, although the variation amount of the decrease is large, the GE base output value is small (close to the lower limit value), so that a situation of “sticking to the lower limit value” occurs (at least The possibility is high).

  Thus, in the case where the photovoltaic power generation is an example as shown in FIG. 3A, it is understood that the GE base output value is desirably 85% rather than at least 60%. However, this is the case of the example shown in FIG. That is, for example, in the case of the “sunny afternoon (especially late afternoon)”, as described above, the short-term fluctuation component that is the output of the subtractor 13 has a larger fluctuation amount. For this reason, when the GE base output value is set to 85%, the GE base output value is large (close to the upper limit value) in spite of the large fluctuation amount of the increase. The situation will occur (at least that is more likely).

The above problem will be further described with reference to FIGS. 4 (a) to 4 (e), for example.
First, FIGS. 4A and 4B show an example of the amount of solar radiation. Each shows the change in the amount of solar radiation for one day (daytime) (the vertical axis is the solar radiation amount and the horizontal axis is the time), FIG. 4 (a) is the amount of solar radiation on a sunny day, and (b) is cloudy. The change of the amount of solar radiation of the day is shown. The time when the solar radiation amount shown in FIG. 4 (a) reaches its peak may be regarded as about noon. Thus, as shown in the figure, the variation in the amount of solar radiation generally has an upward trend in the morning and a downward trend in the afternoon, regardless of whether it is clear or cloudy. As a result, the amount of photovoltaic power generation also tends to rise in the morning and decline in the afternoon.

FIG. 4 (c) shows the solar power generated in the morning and FIG. 4 (d) shows the solar power generated in the afternoon.
As shown in FIG. 4C, in the morning, there is a portion where the output decreases, but the fluctuation in the upward direction becomes large. On the contrary, as shown in FIG. 4D, in the afternoon, there is a portion where the output increases, but the fluctuation in the downward direction becomes large.

Moreover, FIG.4 (e) shows the image of the complementation by the gas engine power generator 2 with respect to the fluctuation | variation of solar power generation electric power.
A solid line in FIG. 4E shows an example of a photovoltaic power value measured in real time, and shows a fluctuation pattern of the photovoltaic power value for one day. Normally, as shown in the figure, in addition to medium- to long-term fluctuations in which output increases in the morning and output decreases in the afternoon, short-term fine fluctuations occur. Basically, supplementation that cuts such short-term fluctuations is performed, and only medium-to-long-term fluctuations as indicated by the dotted lines in the figure are provided. Thus, since the output has a lower limit value, the fluctuation compensation is performed in such a way that the output above the lower limit value is always added. As shown in

  If there is no short-term fluctuation in the photovoltaic power generation, that is, the output indicated by the dotted line in the figure, the gas engine output is always constant at the GE base output value, and the output after complementation is It will always be "Solar power generation + GE base output of gas engine".

  In response to the above problem, this technique proposes to newly provide a GE base output setting unit 20. The GE base output setting unit 20 makes the GE base output value variable, determines an appropriate GE base output value according to the weather, time zone, etc., as needed, and outputs it to the adder 14.

Hereinafter, the GE base output setting unit 20 will be described.
The GE base output setting unit 20 includes a pattern storage unit 21, a weather forecast acquisition unit 22, a GE base output pattern selection unit 23, and a GE base output unit 24.

  The pattern storage unit 21 has a plurality of GE base output value patterns (for example, one day (during the day; from sunrise to sunset)) that are determined to be appropriate in advance according to the weather, time zone, and the like. Value patterns are stored in advance for each weather). Note that the GE base output value pattern is an aggregate of GE base output values set for each unit time (for example, in units of 10 minutes).

  This is created by, for example, a developer or the like based on the actual data of the amount of photovoltaic power generation according to each past weather. The GE base output value pattern stored in the pattern storage unit 21 is set as follows, for example.

  That is, for example, the GE base output value is set to a relatively large value for the time / time period in which the generated power of the solar power generation device 3 is assumed to have a larger fluctuation amount in the upward direction. On the other hand, the GE base output value is set to a relatively small value for the time / time zone in which the generated power of the solar power generation device 3 is assumed to have a larger amount of fluctuation in the downward direction. For example, the GE base output value is a relatively large value in the morning and a relatively small value in the afternoon. An example of such a pattern is shown in FIG. 6 and will be described later.

  However, it is not restricted to the above examples. Basically, if a GE base output value pattern that reduces the possibility that the gas engine power generation output sticks to the upper limit value or the lower limit value is set according to the actual data of the generated power of the solar power generation device 3 or the like. Good. For example, one example is shown in FIG. 6 and another example is shown in FIG. 7, which will be described later.

  The weather forecast acquisition unit 22 is a functional unit that acquires weather forecast information. The weather forecast acquisition unit 22 connects to an arbitrary weather forecast site via a network such as the Internet, and acquires, for example, the next day's weather forecast from the weather forecast site. This is done, for example, every day after sunset. This is because, after sunset, solar power generation does not generate power, so that it is not necessary to supplement the output fluctuation. Note that the weather forecast acquisition unit 22 is not limited to this example, and the weather forecast acquisition unit 22 obtains the weather forecast information manually by a user from a function unit that reads weather forecast information stored in a portable storage medium (memory card or the like) or a keyboard, for example. It may be a functional unit to be input.

  The GE base output pattern selection unit 23 selects a corresponding pattern according to the weather forecast information from among a plurality of types of GE base output value patterns stored in the pattern storage unit 21, for example, the GE base output value of the next day. Determine and set as a pattern.

  The GE base output unit 24 outputs a GE base output value to the adder 14 based on the determined / set GE base output value pattern, for example, from sunrise to sunset on the next day. The GE base output value pattern is, for example, time-series setting data of GE base output values (for example, in increments of 10 minutes) corresponding to each time / time zone of one day (for example, from sunrise to sunset). . Thus, the GE base output unit 24 obtains the current time from, for example, the clock function or the like as needed, and the GE base corresponding to the current time (time / time zone) from the determined / set GE base output value pattern. The output value is acquired, and the acquired GE base output value is output to the adder 14.

FIG. 5 is a processing flowchart of the GE base output setting unit 20.
In the GE base output setting unit 20, the weather forecast acquisition unit 22 first acquires the weather forecast information for the next day after sunset, for example, as described above (step S11). Thereafter, the GE base output pattern selection unit 23 executes the processes after step S12. In this example, it is assumed that the weather forecast is one of “sunny”, “cloudy”, and “rain”, and the GE base output value pattern is previously “sunny”, “cloudy”. It is assumed that three types corresponding to “rain” are created and stored in the pattern storage unit 21. However, the present invention is not limited to such an example.

  When the weather forecast for the next day is “clear” (step S12, YES), the GE base output pattern selection unit 23 acquires a “clear” GE base output value pattern from the pattern storage unit 21 ( In step S13), this is set as a GE base output value pattern for the next day (step S17).

  When the weather forecast for the next day is “rainy” (step S12, NO at step S14, YES), the GE base output pattern selection unit 23 selects the “rain” GE base output value pattern from the pattern storage unit 21. (Step S15), and this is set as a GE base output value pattern for the next day (step S17).

  When the weather forecast for the next day is “cloudy” (both steps S12 and S14 are NO), the GE base output pattern selection unit 23 obtains the “cloudy” GE base output value pattern from the pattern storage unit 21. It is acquired (step S16), and this is set as the GE base output value pattern for the next day (step S17).

  Note that “set” means storing in a predetermined storage area such as a memory (not shown), but is not limited to this example. In this example, on the next day, the GE base output unit 24 refers to the predetermined storage area to execute acquisition of the GE base output value corresponding to the current time and output to the adder 14. Become.

  The GE base output setting unit 20 is realized by a general-purpose computer such as a personal computer. Therefore, the hardware configuration is a general configuration such as a personal computer. That is, although not particularly illustrated, for example, it has a CPU, a storage device (hard disk, memory, etc.), an input / output interface, a communication function unit, etc., and further has a display and an input device (keyboard, mouse, etc.). Also good.

  A predetermined application program is stored in the storage device in advance. When the CPU reads out and executes the application program, the various processing functions of the GE base output setting unit 20 (pattern storage unit 21, weather forecast acquisition unit 22, GE base output pattern selection unit 23, GE base output unit 24). ) And the process of the flowchart in FIG.

FIGS. 6A to 6C show an example (part 1) of the GE base output value pattern.
FIGS. 7A to 7C show an example (No. 2) of the GE base output value pattern.
6 (a) to 6 (c) and FIGS. 7 (a) to 7 (c), the horizontal axis is time, and the time series of GE base output values for one day (excluding nighttime). Setting data is shown. Basically, when solar power generation starts, gas engine power generation also starts, and when solar power generation ends, gas engine power generation also ends. Accordingly, the output of the GE base output is also started when the solar power generation is started, and the output is ended when the solar power generation is ended. In other words, the output of the GE base output starts at sunrise, and ends at sunset. Here, in the middle of the figure (the time when 80% is 60% in FIG. 6A; the time when the minimum value is shown in FIG. 7) is noon, and before that (the left side in the figure) is morning. Suppose that after that (right side of the figure) is the afternoon.

  Examples of GE base output patterns for one day during the day (from sunrise to sunset) are shown in FIGS. 6 (a) to (c) and FIGS. 7 (a) to (c), respectively. . First, FIGS. 6A to 6C will be described.

  FIG. 6 corresponds to the above-described example of “the GE base output is a relatively large value in the morning and a relatively small value in the afternoon”. FIG. 6A shows a clear pattern, FIG. 6B shows a cloudy pattern, and FIG. 6C shows a pattern corresponding to rain.

  As shown in the figure, basically, the GE base output value pattern is relatively large in the morning and relatively small in the afternoon regardless of the weather. As already explained with reference to FIG. 4 etc., whether it is clear or cloudy, short-term fluctuations are larger in the amount of increase in the morning and less in the afternoon. This is to prevent the gas engine power generation output from sticking to the upper and lower limits in response to the larger value.

  On the other hand, in the illustrated example, when the weather is fine, the overall value is lower than in other weather conditions. That is, for example, in the morning, it is 80% when it is fine, but 90% when it is raining. When it is cloudy, the setting is intermediate between sunny and rainy. This is to suppress sticking to the upper and lower limits of the gas engine power generation output, corresponding to the fact that the output fluctuation of the photovoltaic power generation is relatively large both in the upper and lower sides particularly in the case of clear weather.

  That is, for example, as described with reference to FIG. 3, the solar power generation output has a short-term fluctuation in the morning, but the amount of increase is larger than the decrease, but when it is clear, the power generation output value itself is large. It can be said that the fluctuation amount of the decrease is large (although smaller than the increase). The decrease occurs when the sun is hidden by, for example, clouds (even if it is “sunny”, there are some clouds except in the case of clear weather). On the other hand, for example, when it is cloudy, the amount of fluctuation of the decrease is smaller than when it is sunny. Therefore, as in the example shown in FIG. 6, even if “lowering allowance is smaller” than the clear, the possibility of sticking to the upper limit value is low (in the morning, the clear is 80% and the cloudy is 85 %). However, this depends on the way of thinking. In the case of “cloudy”, the “lowering allowance is smaller” compared to clear, so instead of increasing to 85% as in the above example, it is reduced to 75% instead. It is also possible to do. This point may be appropriately determined by the developer, depending on the way of thinking.

As described above, the example illustrated in FIG. 6 is an example based on one idea, and may be set as illustrated in the example illustrated in FIG. 7 according to another concept.
FIG. 7A shows clear, FIG. 7B shows cloudy, and FIG. 7C shows a GE base output value pattern corresponding to rain.

  In the illustrated example, basically, the pattern is minimal during the day regardless of the weather. In the morning, it gradually decreases over the day, and after it reaches a minimum during the day, it gradually increases in the afternoon. When the weather is clear, the local minimum during the day is smaller than when it is cloudy or rainy. This is because, when it is clear, the solar power generation output is naturally larger than when it is cloudy or rainy, and during the day the power generation output is very large. This is because it is considered necessary to increase both the raising allowance and the lowering allowance in order to increase the fluctuation amount of the decrease in.

Note that Example 1 described in FIG. 7 is the example shown in FIG.
Here, FIG. 8 shows an example of the power generation amount of solar power generation according to the weather and a GE base output value pattern according to the power generation amount.

  FIG. 8A shows a clear case, FIG. 8B shows a cloudy case, and FIG. 8C shows a rainy case. The power generation amount of photovoltaic power generation is shown on the left side of the figure, and the GE base output value pattern is shown on the right side of the figure.

First, a sunny day will be described.
As shown on the left side of the figure in FIG. 8A, in the case of clear weather, the amount of power generated by photovoltaic power generation increases, and the fluctuation increases accordingly. In particular, during the daytime, the amount of power generated by solar power generation has almost reached its peak, and while the amount of fluctuation of the increase is small, the amount of decrease when the sun is hidden by clouds because the amount of power generation is large. It tends to increase as shown in the figure. As a result, the GE base output value pattern in the case of clear weather is shown in the right side of the figure (or as shown in FIG. 7A). It is conceivable that the daytime is set to be low (in other words, “increase in the raising allowance”) so that it can easily cope with (large fluctuation).

On the other hand, as shown in FIG. 8C, in the case of rain, the amount of power generated by solar power generation is reduced, and the fluctuation is reduced accordingly.
As shown in FIG. 8B, when it is cloudy, the output fluctuation characteristic is intermediate between sunny and rainy.

Thus, for example, even with a GE base output value pattern as shown in FIG. 7, it can be expected to prevent / suppress the sticking of the gas engine power generation output to the upper limit / lower limit.
The GE base output value pattern is manually input by a user on a personal computer or the like, for example. FIG. 9 is an example of a setting input screen for a GE base output value pattern. This screen will not be described in particular, but for example, setting fields for weather, sunrise time, sunset time, and GE base output value can be arbitrarily set and input for each time zone obtained by dividing the day into many (for example, in units of 10 minutes) A tabular input field that can be displayed. The user inputs desired data on this screen, and the input result is stored in the pattern storage unit 21.

  As described above, according to the power generation system of this example, the power generation fluctuation compensation system 1 and the like, in the system that supplements the output fluctuation of solar power generation by the power generation output of the fuel power generation facility, depending on the weather, time zone, etc. The power generation output of the fuel power generation facility can be adjusted and controlled using an appropriate base output value, thereby reducing the possibility that the power generation output value of the fuel power generation facility will stick to the upper limit value or the lower limit value. And appropriate output fluctuation compensation can be realized.

DESCRIPTION OF SYMBOLS 1 Power generation fluctuation complementation system 2 Gas engine power generation device 3 Solar power generation device 4 Electric power system 10 GE command value determination part 11 PV generation power input part 12 Filter 13 Subtractor 14 Adder 20 GE base output setting part 21 Pattern storage part 22 Weather Forecast acquisition unit 23 GE base output pattern selection unit 24 GE base output unit

Claims (6)

In a power generation system having a solar power generation device and a fuel power generation facility,
It further includes a power generation fluctuation complementing system that acquires the generated power value of the solar power generation device as needed, and controls the power generation amount of the fuel power generation facility based on the acquired generated power value,
The power generation fluctuation compensation system is:
Based on the sum of the short-term fluctuation component of the generated power of the photovoltaic power generation apparatus and the base output value related to the fuel power generation facility, a command value for the power generation amount of the fuel power generation facility is determined to determine the fuel Fuel power generation command value determining means for outputting to the power generation facility;
Base output setting means for determining the base output value as needed and outputting it to the fuel power generation command value determining means;
The base output setting means includes
A base output value pattern storage means in which a base output value pattern which is time series setting data of the base output value corresponding to each time or time zone of one day is stored;
Base output means for outputting a base output value corresponding to the current time or time zone to the fuel power generation command value determining means using the base output value pattern stored in the base output value pattern storage means;
A power generation system comprising: In a power generation system having a solar power generation device and a fuel power generation facility,
It further includes a power generation fluctuation complementing system that acquires the generated power value of the solar power generation device as needed, and controls the power generation amount of the fuel power generation facility based on the acquired generated power value,
The power generation fluctuation compensation system is:
Based on the sum of the short-term fluctuation component of the generated power of the photovoltaic power generation apparatus and the base output value related to the fuel power generation facility, a command value for the power generation amount of the fuel power generation facility is determined to determine the fuel Fuel power generation command value determining means for outputting to the power generation facility;
Base output setting means for determining the base output value as needed and outputting it to the fuel power generation command value determining means;
The base output setting means includes
Base output value patterns that are time series setting data of the base output values corresponding to each time or time zone of a day, and a plurality of types of base output value patterns stored in advance according to each weather; ,
Weather forecast information acquisition means for acquiring weather forecast information;
Of the plurality of base output value patterns corresponding to each weather stored in the base output value pattern storage means, a base output value pattern corresponding to the weather of the weather forecast acquired by the weather forecast information acquisition means is obtained. A base output value pattern selection means to select;
Base output means for outputting a base output value corresponding to the current time or time zone to the fuel power generation command value determining means using the base output value pattern selected by the base output value pattern selecting means;
A power generation system comprising: The base output value pattern stored in the base output value pattern storage means is a relatively large value for the time or time zone in which the generated power of the photovoltaic power generation apparatus is assumed to have a large amount of fluctuation in the upward direction, 3. The power generation system according to claim 1, wherein the time or time zone in which the amount of fluctuation in the descending direction is assumed to be large is set to a relatively small value. The fuel power generation command value determining means includes a filter unit that removes short-period fluctuation components of the generated power value of the acquired solar power generation device, and the acquired power generation value of the solar power generation device from the output of the filter unit. A subtractor for subtracting, and an adder for adding the base output value to the output of the subtracter, and outputs the output of the adder to the fuel power generation facility as a command value of the power generation amount of the fuel power generation facility The power generation system according to any one of claims 1 to 3 . In a power generation system having a solar power generation device and a fuel power generation facility, power generation that acquires the power generation value of the solar power generation device as needed and controls the power generation amount of the fuel power generation facility based on the acquired power generation value A fluctuation compensation system,
Based on the sum of the short-term fluctuation component of the generated power of the photovoltaic power generation apparatus and the base output value related to the fuel power generation facility, a command value for the power generation amount of the fuel power generation facility is determined to determine the fuel Fuel power generation command value determining means for outputting to the power generation facility;
Base output setting means for determining the base output value as needed and outputting it to the fuel power generation command value determining means;
The base output setting means includes
A base output value pattern storage means in which a base output value pattern which is time series setting data of the base output value corresponding to each time or time zone of one day is stored;
Base output means for outputting a base output value corresponding to the current time or time zone to the fuel power generation command value determining means using the base output value pattern stored in the base output value pattern storage means;
A power generation fluctuation complementation system characterized by comprising: In a power generation system having a solar power generation device and a fuel power generation facility, power generation that acquires the power generation value of the solar power generation device as needed and controls the power generation amount of the fuel power generation facility based on the acquired power generation value A fluctuation compensation system,
Based on the sum of the short-term fluctuation component of the generated power of the photovoltaic power generation apparatus and the base output value related to the fuel power generation facility, a command value for the power generation amount of the fuel power generation facility is determined to determine the fuel Fuel power generation command value determining means for outputting to the power generation facility;
Base output setting means for determining the base output value as needed and outputting it to the fuel power generation command value determining means;
The base output setting means includes
Base output value patterns that are time series setting data of the base output values corresponding to each time or time zone of a day, and a plurality of types of base output value patterns stored in advance according to each weather; ,
Weather forecast information acquisition means for acquiring weather forecast information;
Of the plurality of base output value patterns corresponding to each weather stored in the base output value pattern storage means, a base output value pattern corresponding to the weather of the weather forecast acquired by the weather forecast information acquisition means is obtained. A base output value pattern selection means to select;
Base output means for outputting a base output value corresponding to the current time or time zone to the fuel power generation command value determining means using the base output value pattern selected by the base output value pattern selecting means;
A power generation fluctuation complementation system characterized by comprising: