WO2019038954A1 - Device and method for controlling load frequency of power system - Google Patents

Device and method for controlling load frequency of power system Download PDF

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Publication number
WO2019038954A1
WO2019038954A1 PCT/JP2018/005917 JP2018005917W WO2019038954A1 WO 2019038954 A1 WO2019038954 A1 WO 2019038954A1 JP 2018005917 W JP2018005917 W JP 2018005917W WO 2019038954 A1 WO2019038954 A1 WO 2019038954A1
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output
new energy
power
power system
lfc
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PCT/JP2018/005917
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French (fr)
Japanese (ja)
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佑樹 辻井
古川　俊行
渡辺　雅浩
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株式会社日立製作所
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
    • H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers

Definitions

  • the present invention relates to a load frequency control apparatus and method for a power system.
  • LFC load frequency control
  • the amount of fluctuation is calculated at the central power supply command station, and the amount to follow this is calculated
  • the system frequency is suppressed within the allowable range by instructing the
  • the output command is not issued to all the generators, but is issued to a generator capable of changing the output in a short cycle (hereinafter referred to as LFC target generator).
  • LFC target generator a generator capable of changing the output in a short cycle
  • the following two LFC schemes are mainly adopted in each interconnected power system.
  • the first system is a constant frequency control system (hereinafter referred to as an FFC system).
  • FFC system a constant frequency control system
  • the system frequency deviation ⁇ f is detected, and the generator output command is sent to the LFC target generator to reduce the system frequency deviation ⁇ f, thereby keeping the frequency at the specified value.
  • the second system is a frequency bias connection line power flow control system (hereinafter referred to as a TBC system).
  • TBC system a frequency bias connection line power flow control system
  • the system frequency deviation ⁇ f and the interconnection line power flow deviation ⁇ Pt are detected, and the generator output command is sent to the LFC target generator in order to reduce the value determined by the system frequency deviation ⁇ f and the interconnection line power flow deviation ⁇ Pt. Keep the area within your area at the specified value.
  • the regional request amount AR in the TBC method is calculated by the following equation (1).
  • K is a systematic constant.
  • the FFC method is calculated by omitting the frequency deviation ⁇ f from the TBC method (1).
  • Patent Document 1 In the present technical field, the system of Patent Document 1 is known. According to Patent Document 1, supply and demand control performance is improved by separating the new energy and load fluctuation to calculate the area request amount AR, and switching the LFC target generator and the LFC target excluded generator according to the size of the area request amount AR. It is stated that it is possible to
  • the LFC adjustment force is obtained when the fluctuation rapidly increases due to feedback control using the area request amount AR to secure the LFC target generator. May not be secured.
  • the present invention is “a load frequency control device for an electric power system equipped with a new energy power generation facility, which comprises the output of the new energy power generation facility in the electric power system and the theoretical maximum output of the new energy power generation facility
  • the LFC adjustment force determination unit that determines the LFC adjustment power on the power system upside and downside, and the regional demand amount from the power system grid frequency deviation and interconnection power flow deviation, and the upside and downside LFC adjustment
  • a regional demand calculation unit for outputting a regional demand with a power restriction range, and a command value distribution unit for distributing an output command value to an LFC target generator using the regional demand from the regional demand calculation unit as an input
  • a load frequency control device for a power system characterized by comprising:
  • the present invention further provides “a load frequency control method for an electric power system equipped with a new energy power generation facility, comprising: an output of the new energy power generation facility in the electric power system; and a theoretical maximum output of the new energy power generation facility.
  • Determine the LFC adjustment power on the lower side calculate the regional demand from the grid frequency deviation of the power system and the interconnection power flow deviation, and based on the regional demand with the LFC adjustment power on the upper and lower sides as the limitation range
  • a method of controlling a load frequency of an electric power system characterized by distributing an output command value to an LFC target generator.
  • BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows the structural example of a frequency control apparatus of a typical electric power grid
  • the figure which shows the table which showed the image example of the calculated output fluctuation statistical-analysis result The figure which shows the function structural example of the frequency control apparatus 10 of the electric power grid
  • FIG. 1 is a diagram showing an example of a functional configuration of a frequency control device 10 of a power system according to a first embodiment of the present invention.
  • the frequency control device 10 of the power system includes a new energy output database DB1, a new energy theoretical maximum output database DB2, an output command value database DB3, an LFC adjustment force determination unit 11, a frequency detection unit 12, an interconnection power flow detection unit 13, The area request amount AR calculation unit 14 and the command value distribution unit 15 are provided.
  • the new energy output database DB1 stores outputs of new energy connected to the power system.
  • the output of the new energy may be an estimated value calculated from the facility capacity, the installation position, the weather data, etc. when the measured value can not be obtained.
  • the theoretical maximum output of new energy is stored in the new energy theoretical maximum output database DB2.
  • the theoretical maximum output of new energy is a value calculated from the installed capacity of new energy, installation position, weather data, etc.
  • output command value database DB3 among the generators connected to the electric power system, output command values to a generator targeted for LFC (generator targeted for LFC) are stored.
  • the LFC adjustment power determination unit 11 receives the output of the new energy and the theoretical maximum output of the new energy as input to determine the LFC adjustment power.
  • the frequency detection unit 12 detects the system frequency deviation ⁇ f.
  • the interconnection power flow detection unit 13 detects the interconnection power flow deviation ⁇ Pt.
  • the area request amount AR is calculated with the LFC adjustment power, the system frequency deviation ⁇ f, and the interconnection power flow deviation ⁇ Pt as inputs.
  • the command value distribution unit 15 receives the area request amount AR and distributes the output command value to each generator of the LFC target generator.
  • the output command value to each generator of the LFC target generator after allocation is recorded in the output command value database DB3.
  • FIG. 2 shows a configuration example of a power system in which a plurality of measurement data are stored in a database via a communication network, and a frequency control device of the power system according to the first embodiment of the present invention.
  • the electric power system illustrated at the upper side of FIG. 2 is a system in which a plurality of generators G and loads Ld are mutually connected via a node Bus, a transformer Tr, a transmission line L, and the like.
  • various measuring devices are appropriately installed for the purpose of protection, control and monitoring of the power system, and the signal detected by the measuring device is communicated by the load frequency control device 10 of the power system via the communication network 300. It is sent to the part 23.
  • node numbers shown in the drawing are appropriately assigned to the node Bus.
  • the frequency control device 10 of the electric power system illustrated on the lower side of FIG. 2 is configured by a computer system, and includes a display unit 21 such as a display device, an input unit 22 such as a keyboard or a mouse, a communication unit 23, a CPU 24, a memory 25, And various databases DB are connected to the bus line 26.
  • the database DB of the frequency control device 10 of the power system includes a new energy database DB1, a new energy theoretical maximum output database DB2, and an output command value database DB3.
  • the display unit 21 may be configured to use, for example, a printer device or an audio output device instead of or in addition to the display device.
  • the input unit 22 can include, for example, at least one of a keyboard switch, a pointing device such as a mouse, a touch panel, and a voice instruction device.
  • the communication unit 23 includes a circuit for connecting to a communication network and a communication protocol.
  • the CPU 24 executes a calculation program to instruct image data to be displayed, search data in various databases, and the like. It may be configured as one or more semiconductor chips, or may be configured as a computer device such as a calculation server.
  • the memory 25 is configured as, for example, a RAM, and stores a computer program, and stores calculation result data, image data, and the like necessary for each process.
  • the screen data stored in the memory 25 is sent to the display unit 21 and displayed.
  • FIG. 3 shows a flowchart showing the process of LFC adjustment power determination.
  • a sum PA of the outputs of new energy connected to the power system is obtained.
  • the estimated value of the new energy output is calculated and used from the installed capacity, installation position, weather data, etc.
  • estimation is appropriately made by temporal interpolation processing etc., and the total sum PA of the new energy output is finally obtained.
  • the total sum PA of the output of the new energy is obtained as time-series information together with time information.
  • FIG. 4 is an image example of the output of new energy.
  • the horizontal axis represents time
  • the vertical axis represents the amount of solar power generation when assuming solar light as new energy
  • the estimated value PA of the total output of the new energy is, for example, from 6 am It shows the output fluctuation reflecting the weather from 6 o'clock in the evening.
  • the theoretical maximum output of new energy calculated from the facility capacity, the installation position, the weather data and the like is determined, and this is set as, for example, PB.
  • the theoretical maximum output of the new energy is a characteristic that excludes the influence of weather (a characteristic that assumes clear weather in all time zones), and is a characteristic that exhibits a sinusoidal change.
  • the theoretical maximum output of new energy at time t is PBt
  • PAt is measured as the amount of photovoltaic power generation due to the relationship of sunshine.
  • t is 11:30
  • the photovoltaic power generation amount PAt is 60% of the theoretical maximum output PBt of the new energy.
  • the photovoltaic power generation amount PAt is increased by 40% to become the theoretical maximum output PBt of new energy. If this is evaluated from the power system side, when the new energy output sharply increases, the power system Since supply power> load and the grid frequency tends to increase, it means that the LFC adjustment power by the LFC target generator necessary to suppress the grid frequency increase needs to be reduced by 40%. doing.
  • the LFC target generator As described above, if it is the sunny direction (the direction in which the output increases as sunlight), the LFC target generator is the amount of power generation in the downward direction, and if it is the cloudy direction (the direction in which the sunlight decreases the output), the LFC target generator As the amount of power generation in the upward direction.
  • the area request amount AR calculation unit 14 calculates the area request amount AR with the LFC adjustment force in the up and down directions, the system frequency deviation ⁇ f, and the interconnection line power flow deviation ⁇ Pt as inputs.
  • the process here is specifically implemented by the process flow of FIG. 5, for example.
  • step S11 of FIG. 5 information used by the area request amount AR calculation unit 14 is obtained. These are the down side LFC adjustment force (PBt-PAt), the up side LFC adjustment force PAt, the system frequency deviation ⁇ f, and the interconnection line power flow deviation ⁇ Pt.
  • processing step S12 equation (1) is executed to calculate the area request amount AR1.
  • the area request amount AR1 obtained here is calculated as a fluctuation amount from the present time.
  • the area request amount AR1 obtained from the equation (1) is adjusted within the range of the LFC adjustment power on the raising and lowering sides, and is output as the area request amount AR. Specifically, in the above example, it is obtained from the equation (1) within the range of 60% determined as the LFC adjustment force PAt on the higher side and -40% determined as the LFC adjustment force (PBt-PAt) on the lower side. Provides an output that limits the regional demand AR1. For example, when the area request amount AR1 is increased by 60% or more, the output value is limited with the upper limit of 60%. Conversely, if the regional demand AR1 decreases by 40% or more, the output value is limited to the lower limit of -40%.
  • the LFC adjustment power (PBt-PAt) on the lower side is compared with the area request amount AR1 obtained from the equation (1) with absolute values, and is increased at processing step S14.
  • the LFC adjustment power PAt on the side and the area request amount AR1 obtained from the equation (1) are compared by an absolute value.
  • step S13 If it is determined in the process of step S13 that the down side LFC adjustment force (PBt-PAt) is smaller than the area request amount AR1 obtained from the equation (1), the process proceeds to step S16, where the down side LFC adjustment is performed.
  • the force (PBt-PAt) is output as the regional request amount AR.
  • step S14 If it is determined in the process of step S14 that the LFC adjustment power PAt on the raising side is larger than the area request amount AR1 obtained from the equation (1), the process proceeds to processing step S17, and the region request obtained from the equation (1) The amount AR1 is output as the area request amount AR.
  • step S14 If it is determined in the process of processing step S14 that the LFC adjustment power PAt on the raising side is smaller than the area request amount AR1 obtained from the equation (1), the process proceeds to processing step S18, and the LFC adjustment power PAt on the raising side is required Output as the quantity AR.
  • the command value distribution unit 15 determines the distribution of the command value to the LFC target generator by receiving the area request amount AR determined from the LFC adjustment force on the raising and lowering sides and the area request amount AR1 obtained from the equation (1).
  • the output command value database DB3 records the output command values to the generators of the LFC target generator redefined or after allocation without limiting the method of distribution.
  • the first embodiment it is possible to suppress the frequency fluctuation by securing the LFC adjustment power in which the output fluctuation is expected, using the magnitude of the output with respect to the theoretical maximum output of the new energy.
  • the load frequency control apparatus of the electric power system of the second embodiment shown in FIG. 6 is obtained by adding an output fluctuation statistical analysis unit 16 and an output fluctuation statistical analysis result database DB4 to the configuration of the first embodiment.
  • the output fluctuation statistical analysis unit 16 calculates a statistical analysis result of the magnitude PA of the output with respect to the theoretical maximum output PB of the new energy.
  • the output fluctuation statistical analysis result database DB4 stores statistical analysis results of the output magnitude PB with respect to the theoretical maximum output PA of the new energy.
  • FIG. 7 shows a flowchart showing processing of LFC adjustment power determination according to the second embodiment.
  • the same reference numerals are given to the same processing contents as the processing of the flowchart in FIG. 3.
  • a sum PA of the outputs of new energy connected to the power system is obtained.
  • the estimated value of the new energy output is calculated and used from the installed capacity, installation position, weather data, etc.
  • estimation is appropriately performed by temporal interpolation processing to finally obtain the total sum PA of the new energy output.
  • the total sum PA of the output of the new energy is obtained as time-series information together with time information.
  • the theoretical maximum output of new energy calculated from the facility capacity, the installation position, the weather data and the like is determined, and this is set as, for example, PB.
  • the theoretical maximum output of the new energy is a characteristic that excludes the influence of weather (a characteristic that assumes clear weather in all time zones), and is a characteristic that exhibits a sinusoidal change.
  • the theoretical maximum output of new energy at time t is PBt, and it is actually shown that PAt is measured as the amount of photovoltaic power generation due to the relationship of sunshine.
  • processing step S6 a statistical analysis result of the magnitude C of the output PA with respect to the theoretical maximum output PB of the new energy is calculated.
  • the processing of processing step S5 and processing step S6 is executed in the output fluctuation statistical analysis unit 16 of FIG.
  • FIG. 8 is a table showing an image example of the calculated output fluctuation statistical analysis result.
  • the vertical axis indicates the rising side and the falling side of the photovoltaic power generation
  • the horizontal axis indicates the value of the size C of the output PA relative to the theoretical maximum output PB of new energy for each output band Is shown.
  • the value of the magnitude C is specified and shown in the range of 1 to 0, and an output band obtained by dividing this value by 0.1 width is defined on the horizontal axis.
  • the value of fluctuation range at 3 ⁇ is calculated. Note that t can be set to the current time, x can be set to 10 minutes after t, and so on, and x can be set to any time.
  • the output fluctuation ⁇ Z after x time is 3.2 when the raising width on the raising side is the standard deviation ⁇ . %
  • the output fluctuation ⁇ Z after x time is 6.4%
  • the output increase width on the increase side is the standard deviation 3 ⁇
  • the output after x time The variation ⁇ Z is 9.6%.
  • the output fluctuation ⁇ Z after x hours is 1.2% when the raising width on the lower side is the standard deviation ⁇ , and the raising width on the lower side is the standard deviation
  • the output fluctuation ⁇ Z after x time is 2.4% when it is 2 ⁇
  • the output fluctuation ⁇ Z after x time is 3.6% when the rising width on the lower side is 3 ⁇ .
  • the increase or decrease side output fluctuation ⁇ Z increases by a multiple of the standard deviation ⁇ .
  • the output fluctuation ⁇ Z on the large fluctuation side is a large numerical value. For example, when the output band is 0.1 or less, although the raising width on the raising side is large but the lowering width is small, the output fluctuation ⁇ Z on the lowering side shows a small value.
  • processing step S3 the LFC adjustment power on the lower side is determined in consideration of the output fluctuation statistical analysis result of the new energy in processing step S6.
  • processing step S4 the LFC adjustment power on the raising side is determined in consideration of the output fluctuation statistical analysis result of the new energy in processing step S6.
  • the numerical values of the output fluctuation ⁇ Z on the rising side and the falling side selected in this way are values on the rising side and the lowering side in the LFC adjustment force.
  • the AR calculation unit 14 uses the numerical value of the output fluctuation ⁇ Z on the rising side and the lowering side obtained from FIG. 8 as the limit value after x hours, and uses the area request amount AR1 obtained from the equation (1) as the limit value. Output regional demand AR within the range.
  • the frequency fluctuation can be obtained by securing the LFC adjustment power in consideration of the output fluctuation by using the output fluctuation statistical analysis result of the magnitude C of the actual output PB with respect to the theoretical maximum output PA of the new energy. It can be suppressed.
  • the new energy output database DB1 and the new energy theoretical maximum output database DB2 It has been changed to DB5.
  • the new energy output prediction database DB5 stores output prediction values of new energy.
  • the output prediction value of the new energy is, for example, a value obtained by predicting a value several minutes ahead of several hours using a method such as a neural network.
  • the frequency fluctuation can be suppressed by using the output predicted value of the new energy and securing the LFC adjustment power in which the output fluctuation is expected.
  • the load frequency control apparatus 10 of the power system of the fourth embodiment shown in FIG. 10 is the load frequency control apparatus 10 of the first embodiment with the LFC adjustment force determination basis output unit 17 added.
  • the LFC adjustment power determination basis output unit 17 outputs the results of a list that links new energy output, new energy theoretical maximum output, calculation method of LFC adjustment power, etc. to LFC adjustment power for each time cross section Do.
  • FIG. 11 is a table showing an example of an output image of the LFC adjustment power determination basis output unit. The LFC adjustment power on the upside and downside in each time section and the LFC adjustment power based on that are described.
  • a new energy output, theoretical maximum output, calculation method of LFC adjustment power, etc. are linked to LFC adjustment power for each time cross section, and output as LFC adjustment power determination basis, thereby making it fair. Security and transparency can be secured.
  • DB1 New energy output database
  • DB2 New energy theoretical maximum output database
  • DB3 Output command value database
  • DB4 Output fluctuation statistical analysis database
  • DB5 New energy output prediction database
  • 10 Load frequency controller for power system
  • 11 LFC adjustment force determination unit
  • 12 frequency detection unit
  • 13 interconnection power flow detection unit
  • 14 AR calculation unit
  • 15 command value distribution unit
  • 16 output fluctuation statistical analysis unit
  • 17 LFC adjustment force determination Base output unit
  • 22 input unit
  • 25 memory
  • 26 bus line
  • Bus node
  • Tr transformer
  • G generator
  • 140 power transmission line
  • Ld Load
  • 300 Communication network

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Abstract

The present invention obtains LFC adjusted power even in cases such as when fluctuation suddenly becomes greater due to feedback control which uses an area requirement amount AR in order to secure an LFC subjected generator. This device for controlling load frequency of a power system provided with an alternate-energy power generation facility, is provided with: an LFC adjusted power determination unit that determines LFC adjusted power for the increase side and the decrease side of the power system on the basis of an output from the alternate-energy power generation facility of the power system and a theoretical maximum output from the alternate-energy power generation facility; an area requirement amount calculation unit that calculates an area requirement amount on the basis of the system frequency deviation and the interconnection-line current deviation of the power system, and outputs the area requirement amount in which the LFC adjusted power of the increase and decrease sides are set as a limit range; and a command value distribution unit that receives an input of the area requirement amount from the area requirement amount calculation unit, and distributes an output command value to the LFC subjected generator.

Description

電力系統の負荷周波数制御装置及び方法Power system load frequency control device and method
　本発明は、電力系統の負荷周波数制御装置及び方法に関する。 The present invention relates to a load frequency control apparatus and method for a power system.
　電力系統において負荷変動等により需給アンバランスが発生すると、周波数変動が発生する。負荷周波数制御（以下ＬＦＣという）では、数分～２０分程度の負荷変動（新エネルギー変動を含む）に対して、中央給電指令所で変動量を計算し、これに追従する量を各発電機に指令することで、系統周波数を許容範囲に抑制する。この負荷変動量を地域要求量ＡＲと定義し、この地域要求量ＡＲを満たすように発電機に対し出力指令することで、需給平衡を保つことができる。出力指令は全ての発電機に出されるわけでなく、短周期で出力を変更できる発電機（以下ＬＦＣ対象発電機という）に対して出される。なお、通常の運用では数分～２０分程度の負荷変動の調整力（以下ＬＦＣ調整力という）は系統容量の１～２％程度を確保するよう運用している。 When demand and supply imbalance occur in the power system due to load fluctuation and the like, frequency fluctuation occurs. In load frequency control (hereinafter referred to as LFC), for load fluctuations (including new energy fluctuations) in a few minutes to about 20 minutes, the amount of fluctuation is calculated at the central power supply command station, and the amount to follow this is calculated The system frequency is suppressed within the allowable range by instructing the By defining the load fluctuation amount as the regional request amount AR and instructing the generator to output so as to satisfy the regional request amount AR, balance between supply and demand can be maintained. The output command is not issued to all the generators, but is issued to a generator capable of changing the output in a short cycle (hereinafter referred to as LFC target generator). In normal operation, the adjustment of load fluctuation for several minutes to 20 minutes (hereinafter referred to as LFC adjustment ability) is operated to secure about 1 to 2% of the system capacity.
　連系された各電力系統では、主に次の２つのＬＦＣ方式が採用される。 The following two LFC schemes are mainly adopted in each interconnected power system.
　１つ目の方式は、定周波数制御方式（以下ＦＦＣ方式という）である。ＦＦＣ方式では、系統周波数偏差Δｆを検出し、系統周波数偏差Δｆを低減すべくＬＦＣ対象発電機に対して発電機出力指令を送ることで、周波数を規定値に保つ。 The first system is a constant frequency control system (hereinafter referred to as an FFC system). In the FFC method, the system frequency deviation Δf is detected, and the generator output command is sent to the LFC target generator to reduce the system frequency deviation Δf, thereby keeping the frequency at the specified value.
　２つ目の方式は、周波数バイアス連系線潮流制御方式（以下ＴＢＣ方式という）である。ＴＢＣ方式では、系統周波数偏差Δｆと連系線潮流偏ΔＰｔを検出し、系統周波数偏差Δｆと連系線潮流偏ΔＰｔで定まる値を低減すべくＬＦＣ対象発電機に対して発電機出力指令を送ることで、自エリア内を規定値に保つ。ＴＢＣ方式における地域要求量ＡＲは以下の（１）式で算出される。（１）式においてＫは系統定数である。なおＦＦＣ方式ではＴＢＣ方式の（１）式から周波数偏差Δｆを省略することで算出される。
［数１］
ＡＲ＝－Ｋ×Δｆ＋ΔＰｔ・・・（１）
　ここで、電力系統に新エネルギー（太陽光発電や風力発電）が大量に導入され、それに伴う変動が大きくなると、系統容量の１～２％程度のＬＦＣ調整力では不足であり、周波数変動を防止できない恐れがある。一方で、ＬＦＣ調整力を大量に確保すると、新エネルギーの出力が小さい時間帯において、過剰なＬＦＣ対象発電機を確保することになり、経済的でない運用に繋がる。 The second system is a frequency bias connection line power flow control system (hereinafter referred to as a TBC system). In the TBC method, the system frequency deviation Δf and the interconnection line power flow deviation ΔPt are detected, and the generator output command is sent to the LFC target generator in order to reduce the value determined by the system frequency deviation Δf and the interconnection line power flow deviation ΔPt. Keep the area within your area at the specified value. The regional request amount AR in the TBC method is calculated by the following equation (1). In equation (1), K is a systematic constant. The FFC method is calculated by omitting the frequency deviation Δf from the TBC method (1).
[Equation 1]
AR = −K × Δf + ΔPt (1)
Here, when a large amount of new energy (solar power generation and wind power generation) is introduced into the power system, and the fluctuation accompanying it is large, the LFC adjustment power of about 1 to 2% of the system capacity is insufficient, preventing frequency fluctuation. There is a fear that I can not do it. On the other hand, if a large amount of LFC adjustment power is secured, an excess LFC target generator will be secured in a time zone where the output of new energy is small, leading to uneconomical operation.
　本技術分野において、特許文献１の方式が知られている。特許文献１によると、新エネルギーと負荷変動を切り分けて地域要求量ＡＲを算出し、地域要求量ＡＲの大きさによりＬＦＣ対象発電機及びＬＦＣ対象除外発電機を切替えることで、需給制御性能を向上させることが可能と記載されている。 In the present technical field, the system of Patent Document 1 is known. According to Patent Document 1, supply and demand control performance is improved by separating the new energy and load fluctuation to calculate the area request amount AR, and switching the LFC target generator and the LFC target excluded generator according to the size of the area request amount AR. It is stated that it is possible to
特開２０１４－２０４５７７号公報JP, 2014-204577, A
　しかし、特許文献１の電力系統の需給制御システム及び需給制御装置では、ＬＦＣ対象発電機確保のために地域要求量ＡＲを用いるフィードバック制御のため、急激に変動が大きくなった場合等にＬＦＣ調整力を確保できない可能性がある。 However, in the supply and demand control system and the supply and demand control apparatus of the electric power system of Patent Document 1, the LFC adjustment force is obtained when the fluctuation rapidly increases due to feedback control using the area request amount AR to secure the LFC target generator. May not be secured.
　上記課題を解決する為に本発明は、「新エネルギー発電設備を備える電力系統の負荷周波数制御装置であって、電力系統における新エネルギー発電設備の出力と、新エネルギー発電設備の理論的最大出力から電力系統の上げ側と下げ側のＬＦＣ調整力を決定するＬＦＣ調整力決定部と、電力系統の系統周波数偏差と連系線潮流偏差から地域要求量を算出し、上げ側と下げ側のＬＦＣ調整力を制限範囲とする地域要求量を出力する地域要求量計算部と、地域要求量計算部からの地域要求量を入力としてＬＦＣ対象発電機への出力指令値を配分する指令値配分部とを備えることを特徴とする電力系統の負荷周波数制御装置。」としたものである。 In order to solve the above-mentioned problems, the present invention is “a load frequency control device for an electric power system equipped with a new energy power generation facility, which comprises the output of the new energy power generation facility in the electric power system and the theoretical maximum output of the new energy power generation facility The LFC adjustment force determination unit that determines the LFC adjustment power on the power system upside and downside, and the regional demand amount from the power system grid frequency deviation and interconnection power flow deviation, and the upside and downside LFC adjustment A regional demand calculation unit for outputting a regional demand with a power restriction range, and a command value distribution unit for distributing an output command value to an LFC target generator using the regional demand from the regional demand calculation unit as an input A load frequency control device for a power system characterized by comprising:
　また本発明は、「新エネルギー発電設備を備える電力系統の負荷周波数制御方法であって、電力系統における新エネルギー発電設備の出力と、新エネルギー発電設備の理論的最大出力から電力系統の上げ側と下げ側のＬＦＣ調整力を決定し、電力系統の系統周波数偏差と連系線潮流偏差から地域要求量を算出し、上げ側と下げ側のＬＦＣ調整力を制限範囲とする地域要求量に基づいて、ＬＦＣ対象発電機への出力指令値を配分することを特徴とする電力系統の負荷周波数制御方法。」としたものである。 The present invention further provides “a load frequency control method for an electric power system equipped with a new energy power generation facility, comprising: an output of the new energy power generation facility in the electric power system; and a theoretical maximum output of the new energy power generation facility. Determine the LFC adjustment power on the lower side, calculate the regional demand from the grid frequency deviation of the power system and the interconnection power flow deviation, and based on the regional demand with the LFC adjustment power on the upper and lower sides as the limitation range A method of controlling a load frequency of an electric power system, characterized by distributing an output command value to an LFC target generator.
　本発明によれば、新エネルギーの理論的最大出力に対する出力の大きさを用いて、出力変動を見込んだＬＦＣ調整力を確保することで、周波数変動を抑制できる。 According to the present invention, it is possible to suppress frequency fluctuation by securing the LFC adjustment power that allows for output fluctuation using the magnitude of the output relative to the theoretical maximum output of new energy.
本発明の実施例１に係る電力系統の周波数制御装置１０の機能構成例を示す図。The figure which shows the function structural example of the frequency control apparatus 10 of the electric power grid | system which concerns on Example 1 of this invention. 典型的な電力系統と、本発明の実施例１に係る電力系統の周波数制御装置の構成例を示す図。BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows the structural example of a frequency control apparatus of a typical electric power grid | system and the electric power grid | system which concerns on Example 1 of this invention. 本発明の実施例１に係るＬＦＣ調整力決定の処理を示すフローチャート。The flowchart which shows the process of LFC adjustment power determination which concerns on Example 1 of this invention. 新エネルギーの出力のイメージ例を示す図。The figure which shows the image example of the output of new energy. 地域要求量ＡＲ計算部１４の処理の一例を示すフローチャート。The flowchart which shows an example of processing of area demand AR calculation section 14. 本発明の実施例２に係る電力系統の周波数制御装置１０の機能構成例を示す図。The figure which shows the function structural example of the frequency control apparatus 10 of the electric power grid | system which concerns on Example 2 of this invention. 本発明の実施例２に係るＬＦＣ調整力決定の処理を示すフローチャート。The flowchart which shows the processing of LFC adjustment power decision which relates to the execution example 2 of this invention. 算出した出力変動統計解析結果のイメージ例を示したテーブルを示す図。The figure which shows the table which showed the image example of the calculated output fluctuation statistical-analysis result. 本発明の実施例３に係る電力系統の周波数制御装置１０の機能構成例を示す図。The figure which shows the function structural example of the frequency control apparatus 10 of the electric power grid | system which concerns on Example 3 of this invention. 本発明の実施例４に係る電力系統の周波数制御装置１０の機能構成例を示す図。The figure which shows the function structural example of the frequency control apparatus 10 of the electric power grid | system which concerns on Example 4 of this invention. ＬＦＣ調整力決定根拠出力部の出力イメージ例を示すテーブルを示す図。The figure which shows the table which shows the example of an output image of a LFC adjustment power determination reason output part.
　以下、本発明の実施に好適な実施例について説明する。尚、下記はあくまでも実施例に過ぎず、下記具体的内容に発明自体が限定されることを意図するものではない。 Hereinafter, preferred embodiments for carrying out the present invention will be described. The following is merely an example, and the invention itself is not intended to be limited to the following specific contents.
　図１は、本発明の実施例１に係る電力系統の周波数制御装置１０の機能構成例を示す図である。電力系統の周波数制御装置１０は、新エネルギー出力データベースＤＢ１、新エネルギー理論的最大出力データベースＤＢ２、出力指令値データベースＤＢ３、ＬＦＣ調整力決定部１１、周波数検出部１２、連系線潮流検出部１３、地域要求量ＡＲ計算部１４、指令値配分部１５を備える。 FIG. 1 is a diagram showing an example of a functional configuration of a frequency control device 10 of a power system according to a first embodiment of the present invention. The frequency control device 10 of the power system includes a new energy output database DB1, a new energy theoretical maximum output database DB2, an output command value database DB3, an LFC adjustment force determination unit 11, a frequency detection unit 12, an interconnection power flow detection unit 13, The area request amount AR calculation unit 14 and the command value distribution unit 15 are provided.
　新エネルギー出力データベースＤＢ１には、電力系統に接続されている新エネルギーの出力が格納されている。新エネルギーの出力は、測定値が得られない場合には設備容量、設置位置、気象データ等から算出した推定値でもよい。 The new energy output database DB1 stores outputs of new energy connected to the power system. The output of the new energy may be an estimated value calculated from the facility capacity, the installation position, the weather data, etc. when the measured value can not be obtained.
　新エネルギー理論的最大出力データベースＤＢ２には、新エネルギーの理論的最大出力が格納されている。新エネルギーの理論的最大出力は、新エネルギーの設備容量、設置位置、気象データ等から算出した値とする。 The theoretical maximum output of new energy is stored in the new energy theoretical maximum output database DB2. The theoretical maximum output of new energy is a value calculated from the installed capacity of new energy, installation position, weather data, etc.
　出力指令値データベースＤＢ３には、電力系統に接続されている発電機のうち、ＬＦＣ対象とされた発電機（ＬＦＣ対象発電機）への出力指令値が格納されている。 In the output command value database DB3, among the generators connected to the electric power system, output command values to a generator targeted for LFC (generator targeted for LFC) are stored.
　ＬＦＣ調整力決定部１１では、新エネルギーの出力と新エネルギーの理論的最大出力を入力としてＬＦＣ調整力を決定する。 The LFC adjustment power determination unit 11 receives the output of the new energy and the theoretical maximum output of the new energy as input to determine the LFC adjustment power.
　周波数検出部１２では、系統周波数偏差Δｆを検出する。 The frequency detection unit 12 detects the system frequency deviation Δf.
　連系線潮流検出部１３では、連系線潮流偏ΔＰｔを検出する。 The interconnection power flow detection unit 13 detects the interconnection power flow deviation ΔPt.
　地域要求量ＡＲ計算部１４では、ＬＦＣ調整力と、系統周波数偏差Δｆと、連系線潮流偏ΔＰｔを入力として地域要求量ＡＲを計算する。 In the area request amount AR calculation unit 14, the area request amount AR is calculated with the LFC adjustment power, the system frequency deviation Δf, and the interconnection power flow deviation ΔPt as inputs.
　指令値配分部１５では、地域要求量ＡＲを入力としてＬＦＣ対象発電機の各発電機への出力指令値を配分する。 The command value distribution unit 15 receives the area request amount AR and distributes the output command value to each generator of the LFC target generator.
　出力指令値データベースＤＢ３には、配分後のＬＦＣ対象発電機の各発電機への出力指令値が記録される。 The output command value to each generator of the LFC target generator after allocation is recorded in the output command value database DB3.
　図２は、複数の計測データが通信ネットワークを介してデータベースに格納される電力系統と、本発明の実施例１に係る電力系統の周波数制御装置の構成例図を表している。 FIG. 2 shows a configuration example of a power system in which a plurality of measurement data are stored in a database via a communication network, and a frequency control device of the power system according to the first embodiment of the present invention.
　図２の上側に例示した電力系統は、複数の発電機Ｇ及び負荷ＬｄがノードＢｕｓ、変圧器Ｔｒ、送電線路Ｌ等を介して相互に連系されたシステムである。ノードＢｕｓには、電力系統の保護、制御、監視の目的で各種の計測器が適宜設置されており、計測器で検知した信号は通信ネットワーク３００を介して電力系統の負荷周波数制御装置１０の通信部２３に送られる。なお図２では、ノードＢｕｓに対して図示したノード番号を適宜付与して示している。 The electric power system illustrated at the upper side of FIG. 2 is a system in which a plurality of generators G and loads Ld are mutually connected via a node Bus, a transformer Tr, a transmission line L, and the like. In the node bus, various measuring devices are appropriately installed for the purpose of protection, control and monitoring of the power system, and the signal detected by the measuring device is communicated by the load frequency control device 10 of the power system via the communication network 300. It is sent to the part 23. In FIG. 2, node numbers shown in the drawing are appropriately assigned to the node Bus.
　図２の下側に例示した電力系統の周波数制御装置１０は計算機システムで構成されており、ディスプレイ装置等の表示部２１、キーボードやマウス等の入力部２２、通信部２３、ＣＰＵ２４、メモリ２５、および各種データベースＤＢがバス線２６に接続されている。 The frequency control device 10 of the electric power system illustrated on the lower side of FIG. 2 is configured by a computer system, and includes a display unit 21 such as a display device, an input unit 22 such as a keyboard or a mouse, a communication unit 23, a CPU 24, a memory 25, And various databases DB are connected to the bus line 26.
　電力系統の周波数制御装置１０のデータベースＤＢとしては、新エネルギーデータベースＤＢ１、新エネルギー理論的最大出力データベースＤＢ２、出力指令値データベースＤＢ３を備える。 The database DB of the frequency control device 10 of the power system includes a new energy database DB1, a new energy theoretical maximum output database DB2, and an output command value database DB3.
　表示部２１は、例えば、ディスプレイ装置に代えて、またはディスプレイ装置と共に、プリンタ装置または音声出力装置等を用いる構成でもよい。 The display unit 21 may be configured to use, for example, a printer device or an audio output device instead of or in addition to the display device.
　入力部２２は、例えば、キーボードスイッチ、マウス等のポインティング装置、タッチパネル、音声指示装置等の少なくともいずれか一つを備えて構成できる。 The input unit 22 can include, for example, at least one of a keyboard switch, a pointing device such as a mouse, a touch panel, and a voice instruction device.
　通信部２３、通信ネットワークに接続するための回路及び通信プロトコルを備える。 The communication unit 23 includes a circuit for connecting to a communication network and a communication protocol.
　ＣＰＵ２４は、計算プログラムを実行して表示すべき画像データの指示や、各種データベース内のデータの検索等を行う。一つまたは複数の半導体チップとして構成してもよいし、または、計算サーバのようなコンピュータ装置として構成してもよい。 The CPU 24 executes a calculation program to instruct image data to be displayed, search data in various databases, and the like. It may be configured as one or more semiconductor chips, or may be configured as a computer device such as a calculation server.
　メモリ２５は、例えば、ＲＡＭとして構成され、コンピュータプログラムを記憶したり、各処理に必要な計算結果データ及び画像データ等を記憶したりする。メモリ２５に格納された画面データは、表示部２１に送られて表示される。 The memory 25 is configured as, for example, a RAM, and stores a computer program, and stores calculation result data, image data, and the like necessary for each process. The screen data stored in the memory 25 is sent to the display unit 21 and displayed.
　図３は、ＬＦＣ調整力決定の処理を示すフローチャートを表している。 FIG. 3 shows a flowchart showing the process of LFC adjustment power determination.
　処理ステップＳ１では、電力系統に接続されている新エネルギーの出力の総和ＰＡを求める。なお、新エネルギーの出力の総和ＰＡを求めるに際し、通信を介して新エネルギーの出力を入手可能である場合には測定値を用い、通信がないなどの理由により測定値が得られない新エネルギーである場合には、設備容量、設置位置、気象データ等から新エネルギーの出力の推定値を算出して用いる。あるいは通信はあるが通信周期、計測周期が十分でない場合については、適宜時間的補間処理などにより推定して、最終的に新エネルギーの出力の総和ＰＡを求める。ここでは新エネルギーの出力の総和ＰＡが時間情報と共に時系列的情報として得られる。 At processing step S1, a sum PA of the outputs of new energy connected to the power system is obtained. In addition, when obtaining the sum total PA of the output of the new energy, if the output of the new energy is available through the communication, the measured value is used, and the new energy can not be obtained because the communication is not available. In some cases, the estimated value of the new energy output is calculated and used from the installed capacity, installation position, weather data, etc. Alternatively, in the case where there is communication but the communication cycle and the measurement cycle are not sufficient, estimation is appropriately made by temporal interpolation processing etc., and the total sum PA of the new energy output is finally obtained. Here, the total sum PA of the output of the new energy is obtained as time-series information together with time information.
　図４は新エネルギーの出力のイメージ例である。図４は、横軸に時間、縦軸に新エネルギーとして太陽光を想定したときの太陽光発電量を示しており、新エネルギーの出力総和の推定値ＰＡは、日照のある例えば朝６時から夕方６時までの間で、天候を反映した出力変動を示している。 FIG. 4 is an image example of the output of new energy. In FIG. 4, the horizontal axis represents time, and the vertical axis represents the amount of solar power generation when assuming solar light as new energy, and the estimated value PA of the total output of the new energy is, for example, from 6 am It shows the output fluctuation reflecting the weather from 6 o'clock in the evening.
　処理ステップＳ２では、設備容量、設置位置、気象データ等から算出した新エネルギーの理論的最大出力を求め、これを例えばＰＢとする。図４において、新エネルギーの理論的最大出力は天候の影響を排除した特性（全時間帯で快晴を想定した特性）であり、正弦状の変化を示す特性のものである。 In the processing step S2, the theoretical maximum output of new energy calculated from the facility capacity, the installation position, the weather data and the like is determined, and this is set as, for example, PB. In FIG. 4, the theoretical maximum output of the new energy is a characteristic that excludes the influence of weather (a characteristic that assumes clear weather in all time zones), and is a characteristic that exhibits a sinusoidal change.
　この図で例えば時刻ｔにおける新エネルギーの理論的最大出力はＰＢｔであり、実際には日照の関係で太陽光発電量としてはＰＡｔを計測していることを示している。なお図示の例では、ｔは１１時３０分であり、太陽光発電量ＰＡｔは新エネルギーの理論的最大出力ＰＢｔの６０％であるとする。 In this figure, for example, the theoretical maximum output of new energy at time t is PBt, and it is actually shown that PAt is measured as the amount of photovoltaic power generation due to the relationship of sunshine. In the illustrated example, t is 11:30, and the photovoltaic power generation amount PAt is 60% of the theoretical maximum output PBt of the new energy.
　この時刻ｔの状態から、近未来において晴天に移行したとする。このときに、太陽光発電量ＰＡｔは４０％増加して、新エネルギーの理論的最大出力ＰＢｔとなるが、このことを電力系統側から評価すると、新エネルギー出力が急増したとき、電力系統は、供給電力＞負荷となり、系統周波数が高くなる傾向であることから、系統周波数上昇を抑制するために必要なＬＦＣ対象発電機によるＬＦＣ調整力は、４０％相当分、低下させる必要があることを意味している。 It is assumed that the state of time t has shifted to a fine sky in the near future. At this time, the photovoltaic power generation amount PAt is increased by 40% to become the theoretical maximum output PBt of new energy. If this is evaluated from the power system side, when the new energy output sharply increases, the power system Since supply power> load and the grid frequency tends to increase, it means that the LFC adjustment power by the LFC target generator necessary to suppress the grid frequency increase needs to be reduced by 40%. doing.
　逆に時刻ｔの状態から、近未来において曇天に移行したとする。このときに、太陽光発電量ＰＡｔは６０％減少して、０となるが、このことを電力系統側から評価すると、新エネルギー出力が急減したとき、電力系統は、供給電力＜負荷となり、系統周波数が低くなる傾向であることから、系統周波数低下を回復するに必要なＬＦＣ対象発電機によるＬＦＣ調整力は、６０％相当分、増加させる必要があることを意味している。 Conversely, it is assumed that the state of time t has shifted to cloudy in the near future. At this time, the photovoltaic power generation amount PAt decreases 60% and becomes 0. If this is evaluated from the power system side, when the new energy output sharply decreases, the power system becomes supply power <load, and the system Since the frequency tends to decrease, it means that the LFC adjustment power by the LFC target generator necessary to recover the system frequency drop needs to be increased by 60%.
　このように晴れ方向（太陽光としては出力増大方向）であれば、ＬＦＣ対象発電機としては下げ方向の発電量とし、曇天方向（太陽光としては出力減少方向）であれば、ＬＦＣ対象発電機としては上げ方向の発電量とするという関係にある。 As described above, if it is the sunny direction (the direction in which the output increases as sunlight), the LFC target generator is the amount of power generation in the downward direction, and if it is the cloudy direction (the direction in which the sunlight decreases the output), the LFC target generator As the amount of power generation in the upward direction.
　このことから処理ステップＳ３では、新エネルギーの出力増加方向の最大変動幅を想定し、下げ側のＬＦＣ調整力を例えば（ＰＢｔ－ＰＡｔ）とする。これは現在曇天であるが、快晴に転じた状態を想定したときに、新エネルギーの出力の増大量（ＰＢｔ－ＰＡｔ）を、下げ側のＬＦＣ調整力としたものである。 From this, in the processing step S3, a maximum fluctuation range in the output increase direction of new energy is assumed, and the LFC adjustment force on the lower side is, for example, (PBt-PAt). This is cloudy at present, but assuming a clear weather condition, the amount of increase in the output of new energy (PBt-PAt) is used as the LFC adjustment power on the lower side.
　処理ステップＳ４では、新エネルギーの出力減少方向の最大変動幅を想定し、上げ側のＬＦＣ調整力をＰＡとする。これは現在曇天であるが、暗天に転じた状態を想定したときに、新エネルギーの出力の減少量ＰＡｔを、上げ側のＬＦＣ調整力としたものである。 In the processing step S4, a maximum fluctuation range in the power reduction direction of the new energy is assumed, and the LFC adjustment power on the raising side is PA. Although this is currently cloudy, assuming that it has turned to dark, the amount of decrease PAt in the output of new energy is used as the LFC adjustment power on the raising side.
　図１に戻り、地域要求量ＡＲ計算部１４では、上げ、下げ方向のＬＦＣ調整力と、系統周波数偏差Δｆと、連系線潮流偏差ΔＰｔを入力として地域要求量ＡＲを計算する。ここでの処理は、具体的には例えば図５の処理フローにより実施される。 Returning to FIG. 1, the area request amount AR calculation unit 14 calculates the area request amount AR with the LFC adjustment force in the up and down directions, the system frequency deviation Δf, and the interconnection line power flow deviation ΔPt as inputs. The process here is specifically implemented by the process flow of FIG. 5, for example.
　図５の最初の処理ステップＳ１１では、地域要求量ＡＲ計算部１４で使用する情報を入手する。これらは、下げ側のＬＦＣ調整力（ＰＢｔ－ＰＡｔ）と、上げ側のＬＦＣ調整力ＰＡｔと、系統周波数偏差Δｆと、連系線潮流偏差ΔＰｔである。処理ステップＳ１２では、（１）式を実行し、地域要求量ＡＲ１を算出する。ここで求めた地域要求量ＡＲ１は、現在時点からの変動量として算出されている。 In the first processing step S11 of FIG. 5, information used by the area request amount AR calculation unit 14 is obtained. These are the down side LFC adjustment force (PBt-PAt), the up side LFC adjustment force PAt, the system frequency deviation Δf, and the interconnection line power flow deviation ΔPt. In processing step S12, equation (1) is executed to calculate the area request amount AR1. The area request amount AR1 obtained here is calculated as a fluctuation amount from the present time.
　処理ステップＳ２０では、上げ、及び下げ側のＬＦＣ調整力の範囲内に（１）式から求めた地域要求量ＡＲ１を調整し、地域要求量ＡＲとして出力する。具体的には上記の例でいうと、上げ側のＬＦＣ調整力ＰＡｔとして定まる６０％と、下げ側のＬＦＣ調整力（ＰＢｔ－ＰＡｔ）として定まる－４０％の範囲内に（１）式から求めた地域要求量ＡＲ１を制限する出力を与える。例えば地域要求量ＡＲ１が６０％以上増大するものである場合に、出力値は６０％を上限として制限される。逆に地域要求量ＡＲ１が４０％以上減少するものである場合に、出力値は－４０％を下限として制限される。 In processing step S20, the area request amount AR1 obtained from the equation (1) is adjusted within the range of the LFC adjustment power on the raising and lowering sides, and is output as the area request amount AR. Specifically, in the above example, it is obtained from the equation (1) within the range of 60% determined as the LFC adjustment force PAt on the higher side and -40% determined as the LFC adjustment force (PBt-PAt) on the lower side. Provides an output that limits the regional demand AR1. For example, when the area request amount AR1 is increased by 60% or more, the output value is limited with the upper limit of 60%. Conversely, if the regional demand AR1 decreases by 40% or more, the output value is limited to the lower limit of -40%.
　図５の処理ステップＳ２０内の処理ステップＳ１３では、下げ側のＬＦＣ調整力（ＰＢｔ－ＰＡｔ）と（１）式から求めた地域要求量ＡＲ１を絶対値で大小比較し、処理ステップＳ１４では、上げ側のＬＦＣ調整力ＰＡｔと（１）式から求めた地域要求量ＡＲ１を絶対値で大小比較している。 At processing step S13 in processing step S20 of FIG. 5, the LFC adjustment power (PBt-PAt) on the lower side is compared with the area request amount AR1 obtained from the equation (1) with absolute values, and is increased at processing step S14. The LFC adjustment power PAt on the side and the area request amount AR1 obtained from the equation (1) are compared by an absolute value.
　処理ステップＳ１３の処理で、下げ側のＬＦＣ調整力（ＰＢｔ－ＰＡｔ）が（１）式から求めた地域要求量ＡＲ１よりも大きいと判定された場合、処理ステップＳ１６に移り、（１）式から求めた地域要求量ＡＲ１を地域要求量ＡＲとして出力する。 If it is determined that the LFC adjustment force (PBt-PAt) on the lower side is larger than the area request amount AR1 obtained from the equation (1) in the process of the process step S13, the process proceeds to the process step S16, and from the equation (1) The calculated area request amount AR1 is output as the area request amount AR.
　処理ステップＳ１３の処理で、下げ側のＬＦＣ調整力（ＰＢｔ－ＰＡｔ）が（１）式から求めた地域要求量ＡＲ１よりも小さいと判定された場合、処理ステップＳ１６に移り、下げ側のＬＦＣ調整力（ＰＢｔ－ＰＡｔ）を地域要求量ＡＲとして出力する。 If it is determined in the process of step S13 that the down side LFC adjustment force (PBt-PAt) is smaller than the area request amount AR1 obtained from the equation (1), the process proceeds to step S16, where the down side LFC adjustment is performed. The force (PBt-PAt) is output as the regional request amount AR.
　処理ステップＳ１４の処理で、上げ側のＬＦＣ調整力ＰＡｔが（１）式から求めた地域要求量ＡＲ１よりも大きいと判定された場合、処理ステップＳ１７に移り、（１）式から求めた地域要求量ＡＲ１を地域要求量ＡＲとして出力する。 If it is determined in the process of step S14 that the LFC adjustment power PAt on the raising side is larger than the area request amount AR1 obtained from the equation (1), the process proceeds to processing step S17, and the region request obtained from the equation (1) The amount AR1 is output as the area request amount AR.
　処理ステップＳ１４の処理で、上げ側のＬＦＣ調整力ＰＡｔが（１）式から求めた地域要求量ＡＲ１よりも小さいと判定された場合、処理ステップＳ１８に移り、上げ側のＬＦＣ調整力ＰＡｔ地域要求量ＡＲとして出力する。 If it is determined in the process of processing step S14 that the LFC adjustment power PAt on the raising side is smaller than the area request amount AR1 obtained from the equation (1), the process proceeds to processing step S18, and the LFC adjustment power PAt on the raising side is required Output as the quantity AR.
　指令値配分部１５では、上げ、及び下げ側のＬＦＣ調整力と（１）式から求めた地域要求量ＡＲ１から定めた地域要求量ＡＲを受け、ＬＦＣ対象発電機に対する指令値の配分を決定する。本発明では、配分の手法を限定しない
　出力指令値データベースＤＢ３には、再定義され、或は配分後のＬＦＣ対象発電機の各発電機への出力指令値が記録される。 The command value distribution unit 15 determines the distribution of the command value to the LFC target generator by receiving the area request amount AR determined from the LFC adjustment force on the raising and lowering sides and the area request amount AR1 obtained from the equation (1). . In the present invention, the output command value database DB3 records the output command values to the generators of the LFC target generator redefined or after allocation without limiting the method of distribution.
　実施例１によれば、新エネルギーの理論的最大出力に対する出力の大きさを用いて、出力変動を見込んだＬＦＣ調整力を確保することで、周波数変動を抑制できる。 According to the first embodiment, it is possible to suppress the frequency fluctuation by securing the LFC adjustment power in which the output fluctuation is expected, using the magnitude of the output with respect to the theoretical maximum output of the new energy.
　本発明の実施例２について、以下に説明する。なお、実施例１で説明した内容と重複する説明については省略する。 The second embodiment of the present invention will be described below. The description overlapping with the contents described in the first embodiment is omitted.
　図６に示す実施例２の電力系統の負荷周波数制御装置は、実施例１の構成に出力変動統計解析部１６、出力変動統計解析結果データベースＤＢ４を追加したものである。 The load frequency control apparatus of the electric power system of the second embodiment shown in FIG. 6 is obtained by adding an output fluctuation statistical analysis unit 16 and an output fluctuation statistical analysis result database DB4 to the configuration of the first embodiment.
　出力変動統計解析部１６では、新エネルギーの理論的最大出力ＰＢに対する出力の大きさＰＡの統計解析結果を算出する。 The output fluctuation statistical analysis unit 16 calculates a statistical analysis result of the magnitude PA of the output with respect to the theoretical maximum output PB of the new energy.
　出力変動統計解析結果データベースＤＢ４には、新エネルギーの理論的最大出力ＰＡに対する出力の大きさＰＢの統計解析結果が格納されている。 The output fluctuation statistical analysis result database DB4 stores statistical analysis results of the output magnitude PB with respect to the theoretical maximum output PA of the new energy.
　図７は、実施例２に係るＬＦＣ調整力決定の処理を示すフローチャートを表している。なお、図３のフローチャートの処理と同じ処理内容のものについては、同一符号を付与している。 FIG. 7 shows a flowchart showing processing of LFC adjustment power determination according to the second embodiment. The same reference numerals are given to the same processing contents as the processing of the flowchart in FIG. 3.
　図７の最初の処理ステップＳ１では、電力系統に接続されている新エネルギーの出力の総和ＰＡを求める。なお、新エネルギーの出力の総和ＰＡを求めるに際し、通信を介して新エネルギーの出力を入手可能である場合には測定値を用い、通信がないなどの理由により測定値が得られない新エネルギーである場合には、設備容量、設置位置、気象データ等から新エネルギーの出力の推定値を算出して用いる。あるいは通信はあるが通信周期、計測周期が十分でない場合については、適宜時間的補間処理により推定して、最終的に新エネルギーの出力の総和ＰＡを求める。ここでは新エネルギーの出力の総和ＰＡが時間情報と共に時系列的情報として得られる。 In the first processing step S1 of FIG. 7, a sum PA of the outputs of new energy connected to the power system is obtained. In addition, when obtaining the sum total PA of the output of the new energy, if the output of the new energy is available through the communication, the measured value is used, and the new energy can not be obtained because the communication is not available. In some cases, the estimated value of the new energy output is calculated and used from the installed capacity, installation position, weather data, etc. Alternatively, in the case where there is communication but the communication cycle and the measurement cycle are not sufficient, estimation is appropriately performed by temporal interpolation processing to finally obtain the total sum PA of the new energy output. Here, the total sum PA of the output of the new energy is obtained as time-series information together with time information.
　処理ステップＳ２では、設備容量、設置位置、気象データ等から算出した新エネルギーの理論的最大出力を求め、これを例えばＰＢとする。図４において、新エネルギーの理論的最大出力は天候の影響を排除した特性（全時間帯で快晴を想定した特性）であり、正弦状の変化を示す特性のものである。この図で例えば時刻ｔにおける新エネルギーの理論的最大出力はＰＢｔであり、実際には日照の関係で太陽光発電量としてはＰＡｔを計測していることを示している。 In the processing step S2, the theoretical maximum output of new energy calculated from the facility capacity, the installation position, the weather data and the like is determined, and this is set as, for example, PB. In FIG. 4, the theoretical maximum output of the new energy is a characteristic that excludes the influence of weather (a characteristic that assumes clear weather in all time zones), and is a characteristic that exhibits a sinusoidal change. In this figure, for example, the theoretical maximum output of new energy at time t is PBt, and it is actually shown that PAt is measured as the amount of photovoltaic power generation due to the relationship of sunshine.
　処理ステップＳ５では、新エネルギー理論的最大出力ＰＢに対する新エネルギー出力ＰＡの大きさＺをＺ＝ＰＡ／ＰＢとする。処理ステップＳ６では、新エネルギーの理論的最大出力ＰＢに対する出力ＰＡの大きさＣの統計解析結果を算出する。なお処理ステップＳ５および処理ステップＳ６の処理は、図７の出力変動統計解析部１６において実行される。 In the processing step S5, the magnitude Z of the new energy output PA with respect to the new energy theoretical maximum output PB is set to Z = PA / PB. At processing step S6, a statistical analysis result of the magnitude C of the output PA with respect to the theoretical maximum output PB of the new energy is calculated. The processing of processing step S5 and processing step S6 is executed in the output fluctuation statistical analysis unit 16 of FIG.
　図８は、算出した出力変動統計解析結果のイメージ例を示したテーブルである。図８のテーブルでは縦軸側に太陽光発電量の上げ側と下げ側を示し、横軸側に新エネルギーの理論的最大出力ＰＢに対する出力ＰＡの大きさＣの値を出力帯ごとに区分して示している。具体的には、大きさＣの値を１から０の範囲で規定化して示し、これを０．１幅で区分した出力帯を横軸に定義している。また太陽光発電量の上げ側（：ＰＢ－ＰＡ）についての単位時間ｘ当たりの出力変動ΔＺをΔＺ＝Ｚ（ｔ＋ｘ）―Ｚ（ｔ）として定めて、標準偏差σについてσ、２σ、３σの時の変動幅の値を算出し、下げ側（：ＰＡ）についての単位時間ｘ当たりの出力変動ΔＺをΔＺ＝Ｚ（ｔ）―Ｚ（ｔ＋ｘ）として定めて、標準偏差σについてσ、２σ、３σの時の変動幅の値を算出している。なお、ｔは現在時刻、ｘはｔの１０分後と設定する等、ｘは任意の時刻を設定できるものとする。 FIG. 8 is a table showing an image example of the calculated output fluctuation statistical analysis result. In the table of FIG. 8, the vertical axis indicates the rising side and the falling side of the photovoltaic power generation, and the horizontal axis indicates the value of the size C of the output PA relative to the theoretical maximum output PB of new energy for each output band Is shown. Specifically, the value of the magnitude C is specified and shown in the range of 1 to 0, and an output band obtained by dividing this value by 0.1 width is defined on the horizontal axis. Further, the output fluctuation ΔZ per unit time x for the increase side (: PB-PA) of the photovoltaic power generation amount is defined as ΔZ = Z (t + x) −Z (t), and the standard deviation σ is σ, 2σ, 3σ The value of fluctuation range at the time of calculation is calculated, and the output fluctuation .DELTA.Z per unit time x for the down side (: PA) is defined as .DELTA.Z = Z (t) -Z (t + x). The value of fluctuation range at 3σ is calculated. Note that t can be set to the current time, x can be set to 10 minutes after t, and so on, and x can be set to any time.
　図８のテーブルによる出力変動統計解析結果によれば、出力帯が例えば０．１以下である時に、上げ側の上げ幅が標準偏差σである時の、ｘ時間後の出力変動ΔＺは３．２％であり、上げ側の上げ幅が標準偏差２σである時の、ｘ時間後の出力変動ΔＺは６．４％であり、上げ側の上げ幅が標準偏差３σである時の、ｘ時間後の出力変動ΔＺは９．６％である。同様に、出力帯が例えば０．１以下である時に、下げ側の上げ幅が標準偏差σである時の、ｘ時間後の出力変動ΔＺは１．２％であり、下げ側の上げ幅が標準偏差２σである時の、ｘ時間後の出力変動ΔＺは２．４％であり、下げ側の上げ幅が標準偏差３σである時の、ｘ時間後の出力変動ΔＺは３．６％である。 According to the output fluctuation statistical analysis result by the table in FIG. 8, when the output band is, for example, 0.1 or less, the output fluctuation ΔZ after x time is 3.2 when the raising width on the raising side is the standard deviation σ. %, When the increase width on the increase side is the standard deviation 2σ, the output fluctuation ΔZ after x time is 6.4%, and the output increase width on the increase side is the standard deviation 3σ, the output after x time The variation ΔZ is 9.6%. Similarly, when the output band is, for example, 0.1 or less, the output fluctuation ΔZ after x hours is 1.2% when the raising width on the lower side is the standard deviation σ, and the raising width on the lower side is the standard deviation The output fluctuation ΔZ after x time is 2.4% when it is 2σ, and the output fluctuation ΔZ after x time is 3.6% when the rising width on the lower side is 3σ.
　このテーブルによれば、同一出力帯であれば、上げまたは下げ側の出力変動ΔＺは標準偏差σの倍数で増加する。また同一出力帯であれば、変動幅の大きい側での出力変動ΔＺが大きな数値となる。例えば出力帯が０．１以下である時に、上げ側の上げ幅は大きいが、下げ幅は小さいことから、下げ側の出力変動ΔＺが小さな値を示す。 According to this table, in the case of the same output band, the increase or decrease side output fluctuation ΔZ increases by a multiple of the standard deviation σ. In the case of the same output band, the output fluctuation ΔZ on the large fluctuation side is a large numerical value. For example, when the output band is 0.1 or less, although the raising width on the raising side is large but the lowering width is small, the output fluctuation ΔZ on the lowering side shows a small value.
　処理ステップＳ３では、処理ステップＳ６の新エネルギーの出力変動統計解析結果を考慮して下げ側のＬＦＣ調整力を決定する。処理ステップＳ４では、処理ステップＳ６の新エネルギーの出力変動統計解析結果を考慮して上げ側のＬＦＣ調整力を決定する。 In processing step S3, the LFC adjustment power on the lower side is determined in consideration of the output fluctuation statistical analysis result of the new energy in processing step S6. In processing step S4, the LFC adjustment power on the raising side is determined in consideration of the output fluctuation statistical analysis result of the new energy in processing step S6.
　なお処理ステップＳ３、Ｓ４の処理に関し、例えば出力帯が０．１以下である時に、上げ側、あるいは下げ側の標準偏差σとして、σ、２σ、３σのいずれを選択するのかについては、人為的判断で行われ、あるいは需給バランスと経済性を考慮して自動的に決定される。小さい標準偏差σを選択すれば、需給バランスは悪いが経済性上は有利に働く、逆に大きい標準偏差３σを選択すれば、需給バランスは良いが経済性上は不利であることから、何らかの指針をもって、適宜の数値を選択して使用する。 Regarding the processing of the processing steps S3 and S4, for example, it is artificially selected which of σ, 2σ, and 3σ is selected as the standard deviation σ on the raising side or the lowering side when the output band is 0.1 or less. It is made by judgment or automatically determined in consideration of supply and demand balance and economy. If a small standard deviation σ is selected, the balance between supply and demand is bad, but it is economically advantageous. Conversely, if a large standard deviation 3σ is selected, the balance between supply and demand is good but the economic disadvantage is disadvantageous. The appropriate numerical value is selected and used.
　このようにして選択された上げ側と下げ側の出力変動ΔＺの数値が、ＬＦＣ調整力における上げ側と下げ側での値とされる。 The numerical values of the output fluctuation ΔZ on the rising side and the falling side selected in this way are values on the rising side and the lowering side in the LFC adjustment force.
　ＡＲ計算部１４においては、図８から得られた上げ側、下げ側の出力変動ΔＺの数値を、ｘ時間後における制限値として用い、（１）式から求めた地域要求量ＡＲ１を制限値とする範囲内の地域要求量ＡＲを出力する。 The AR calculation unit 14 uses the numerical value of the output fluctuation ΔZ on the rising side and the lowering side obtained from FIG. 8 as the limit value after x hours, and uses the area request amount AR1 obtained from the equation (1) as the limit value. Output regional demand AR within the range.
　実施例２によれば、新エネルギーの理論的最大出力ＰＡに対する実出力ＰＢの大きさＣの出力変動統計解析結果を用いて、出力変動を見込んだＬＦＣ調整力を確保することで、周波数変動を抑制できる。 According to the second embodiment, the frequency fluctuation can be obtained by securing the LFC adjustment power in consideration of the output fluctuation by using the output fluctuation statistical analysis result of the magnitude C of the actual output PB with respect to the theoretical maximum output PA of the new energy. It can be suppressed.
　本発明の実施例３について、以下に説明する。なお、実施例１で説明した内容と重複する説明については省略する。 The third embodiment of the present invention will be described below. The description overlapping with the contents described in the first embodiment is omitted.
　図９に示す実施例３の電力系統の負荷周波数制御装置１０は、実施例１の負荷周波数制御装置１０において、新エネルギー出力データベースＤＢ１と新エネルギー理論的最大出力データベースＤＢ２を、新エネルギー出力予測データベースＤＢ５に変更したものである。 In the load frequency control apparatus 10 of the power system of the third embodiment shown in FIG. 9, in the load frequency control apparatus 10 of the first embodiment, the new energy output database DB1 and the new energy theoretical maximum output database DB2 It has been changed to DB5.
　新エネルギー出力予測データベースＤＢ５には、新エネルギーの出力予測値が格納されている。新エネルギーの出力予測値は、ニューラルネットワーク等の手法を用いて、数分、数時間先の値を予測したもの等である。 The new energy output prediction database DB5 stores output prediction values of new energy. The output prediction value of the new energy is, for example, a value obtained by predicting a value several minutes ahead of several hours using a method such as a neural network.
　実施例３によれば、新エネルギーの出力予測値を使用し、出力変動を見込んだＬＦＣ調整力を確保することで、周波数変動を抑制できる。 According to the third embodiment, the frequency fluctuation can be suppressed by using the output predicted value of the new energy and securing the LFC adjustment power in which the output fluctuation is expected.
　本発明の実施例４について、以下に説明する。なお、実施例１で説明した内容と重複する説明については省略する。 The fourth embodiment of the present invention will be described below. The description overlapping with the contents described in the first embodiment is omitted.
　図１０に示す実施例４の電力系統の負荷周波数制御装置１０は、実施例１の負荷周波数制御装置１０において、ＬＦＣ調整力決定根拠出力部１７を追加したものである。 The load frequency control apparatus 10 of the power system of the fourth embodiment shown in FIG. 10 is the load frequency control apparatus 10 of the first embodiment with the LFC adjustment force determination basis output unit 17 added.
　ＬＦＣ調整力決定根拠出力部１７において、時間断面毎のＬＦＣ調整力に対して、新エネルギー出力、新エネルギー理論的最大出力、ＬＦＣ調整力の算出方法等を紐付けた一覧表等の結果を出力する。 The LFC adjustment power determination basis output unit 17 outputs the results of a list that links new energy output, new energy theoretical maximum output, calculation method of LFC adjustment power, etc. to LFC adjustment power for each time cross section Do.
　図１１はＬＦＣ調整力決定根拠出力部の出力イメージ例を示すテーブルである。各時間断面における上げ側と下げ側のＬＦＣ調整力とそれに基づくＬＦＣ調整力決定根拠を記載している。 FIG. 11 is a table showing an example of an output image of the LFC adjustment power determination basis output unit. The LFC adjustment power on the upside and downside in each time section and the LFC adjustment power based on that are described.
　実施例４によれば、時間断面毎のＬＦＣ調整力に対して、新エネルギー出力、理論的最大出力、ＬＦＣ調整力の算出方法等を紐付け、ＬＦＣ調整力決定根拠として出力することで、公平性・透明性を担保することができる。 According to the fourth embodiment, a new energy output, theoretical maximum output, calculation method of LFC adjustment power, etc. are linked to LFC adjustment power for each time cross section, and output as LFC adjustment power determination basis, thereby making it fair. Security and transparency can be secured.
ＤＢ１：新エネルギー出力データベース，ＤＢ２：新エネルギー理論的最大出力データベース，ＤＢ３：出力指令値データベース，ＤＢ４：出力変動統計解析データベース，ＤＢ５：新エネルギー出力予測データベース，１０：電力系統の負荷周波数制御装置，１１：ＬＦＣ調整力決定部，１２：周波数検出部，１３：連系線潮流検出部，１４：ＡＲ計算部，１５：指令値配分部，１６：出力変動統計解析部，１７：ＬＦＣ調整力決定根拠出力部，２１：表示部，２２：入力部，２３：通信部，２４：ＣＰＵ，２５：メモリ，２６：バス線，Ｂｕｓ：ノード，Ｔｒ：変圧器，Ｇ：発電機，１４０：送電線路，Ｌｄ：負荷，３００：通信ネットワーク DB1: New energy output database, DB2: New energy theoretical maximum output database, DB3: Output command value database, DB4: Output fluctuation statistical analysis database, DB5: New energy output prediction database, 10: Load frequency controller for power system, 11: LFC adjustment force determination unit, 12: frequency detection unit, 13: interconnection power flow detection unit, 14: AR calculation unit, 15: command value distribution unit, 16: output fluctuation statistical analysis unit, 17: LFC adjustment force determination Base output unit, 21: display unit, 22: input unit, 23: communication unit, 24: CPU, 25: memory, 26: bus line, Bus: node, Tr: transformer, G: generator, 140: power transmission line , Ld: Load, 300: Communication network

Claims (9)

  1. 　新エネルギー発電設備を備える電力系統の負荷周波数制御装置であって、
    　電力系統における新エネルギー発電設備の出力と、新エネルギー発電設備の理論的最大出力から電力系統の上げ側と下げ側のＬＦＣ調整力を決定するＬＦＣ調整力決定部と、電力系統の系統周波数偏差と連系線潮流偏差から地域要求量を算出し、前記上げ側と下げ側のＬＦＣ調整力を制限範囲とする前記地域要求量を出力する地域要求量計算部と、該地域要求量計算部からの地域要求量を入力としてＬＦＣ対象発電機への出力指令値を配分する指令値配分部とを備えることを特徴とする電力系統の負荷周波数制御装置。     A load frequency controller for a power system including a new energy power generation facility,
    LFC adjustment force determination unit that determines the LFC adjustment power of the power system upside and downside from the output of the new energy power generation facility in the power system and the theoretical maximum output of the new energy power generation facility, the system frequency deviation of the power system An area request amount calculation unit that calculates the area request amount from the interconnection line power flow deviation and outputs the area request amount with the LFC adjustment power on the up side and the down side as the limitation range, and the area request amount calculation unit A load frequency control apparatus for an electric power system, comprising: a command value distribution unit that receives an area request amount and distributes an output command value to an LFC target generator.
  2. 　請求項１に記載の電力系統の負荷周波数制御装置であって、
    　前記ＬＦＣ調整力決定部は、新エネルギー発電設備の理論的最大出力と新エネルギー発電設備の出力の差を下げ側のＬＦＣ調整力とし、新エネルギー発電設備の出力を上げ側のＬＦＣ調整力として決定することを特徴とする電力系統の負荷周波数制御装置。     The load frequency controller for a power system according to claim 1, wherein
    The LFC adjustment power determination unit determines the difference between the theoretical maximum output of the new energy power generation facility and the output of the new energy power generation facility as LFC adjustment power on the lower side, and determines the output of the new energy power generation facility as LFC adjustment power on the higher side A load frequency controller for a power system characterized by:
  3. 　請求項１に記載の電力系統の負荷周波数制御装置であって、
    　新エネルギー発電設備の理論的最大出力に対する新エネルギー発電設備の出力の大きさの出力変動統計解析結果を解析により求め記憶する出力変動統計解析部を備え、前記ＬＦＣ調整力決定部は前記出力変動統計解析部からの解析結果を用いて電力系統の上げ側と下げ側のＬＦＣ調整力を決定することを特徴とする電力系統の負荷周波数制御装置。     The load frequency controller for a power system according to claim 1, wherein
    An output fluctuation statistical analysis unit for calculating and storing an output fluctuation statistical analysis result of a size of an output of the new energy power generation equipment with respect to a theoretical maximum output of the new energy power generation equipment, the LFC adjustment force determination unit is the output fluctuation statistics A load frequency control device for an electric power system, which determines LFC adjustment powers on the upper and lower sides of the electric power system using an analysis result from an analysis unit.
  4. 　請求項１に記載の電力系統の負荷周波数制御装置であって、
    　前記ＬＦＣ調整力決定部は、電力系統における新エネルギー発電設備の出力の予測値と、新エネルギー発電設備の理論的最大出力の予測値から電力系統の上げ側と下げ側のＬＦＣ調整力を決定することを特徴とする電力系統の負荷周波数制御装置。     The load frequency controller for a power system according to claim 1, wherein
    The LFC adjustment power determination unit determines the LFC adjustment power on the rising side and the lowering side of the power system from the predicted value of the output of the new energy power generation facility in the power system and the predicted value of the theoretical maximum output of the new energy power generation facility Load frequency control device for electric power system characterized by the above.
  5. 　請求項１から請求項４のいずれか１項に記載の電力系統の負荷周波数制御装置であって、
    　時間断面毎のＬＦＣ調整力に対して、新エネルギー発電設備の出力、理論的最大出力、ＬＦＣ調整力の算出方法等を紐付け、ＬＦＣ調整力決定根拠として出力するＬＦＣ調整力決定根拠出力部を備えることを特徴とする電力系統の負荷周波数制御装置。     A load frequency control apparatus for an electric power system according to any one of claims 1 to 4, wherein
    LFC adjustment power determination basis output unit that outputs LFC adjustment power determination grounds by linking output power of new energy power generation equipment, theoretical maximum output, calculation method of LFC adjustment power, etc. to LFC adjustment power for each time cross section A load frequency control device for a power system, comprising:
  6. 　新エネルギー発電設備を備える電力系統の負荷周波数制御方法であって、
    　電力系統における新エネルギー発電設備の出力と、新エネルギー発電設備の理論的最大出力から電力系統の上げ側と下げ側のＬＦＣ調整力を決定し、電力系統の系統周波数偏差と連系線潮流偏差から地域要求量を算出し、前記上げ側と下げ側のＬＦＣ調整力を制限範囲とする前記地域要求量に基づいて、ＬＦＣ対象発電機への出力指令値を配分することを特徴とする電力系統の負荷周波数制御方法。     A load frequency control method of an electric power system provided with a new energy power generation facility, comprising:
    From the output of the new energy power generation facility in the power system and the theoretical maximum output of the new energy power generation facility, the LFC adjustment power of the power system upside and downside is determined, and from the power system frequency deviation and interconnection power flow deviation An electric power system characterized by calculating an area request amount and distributing an output command value to an LFC target generator based on the area request amount having the LFC adjustment power of the up side and the down side as a limitation range. Load frequency control method.
  7. 　請求項６に記載の電力系統の負荷周波数制御方法であって、
    　新エネルギー発電設備の理論的最大出力と新エネルギー発電設備の出力の差を下げ側のＬＦＣ調整力とし、新エネルギー発電設備の出力を上げ側のＬＦＣ調整力とすることを特徴とする電力系統の負荷周波数制御方法。     7. A load frequency control method for a power system according to claim 6, wherein
    The difference between the theoretical maximum output of the new energy power generation facility and the output of the new energy power generation facility is the LFC adjustment power on the lower side, and the output of the new energy power generation facility is the LFC adjustment power on the higher side Load frequency control method.
  8. 　請求項６に記載の電力系統の負荷周波数制御方法であって、
    　新エネルギー発電設備の理論的最大出力に対する新エネルギー発電設備の出力の大きさの出力変動統計解析結果を求め、解析結果を用いて電力系統の上げ側と下げ側のＬＦＣ調整力を決定することを特徴とする電力系統の負荷周波数制御方法。     7. A load frequency control method for a power system according to claim 6, wherein
    Determining the output fluctuation statistical analysis result of the size of the output of the new energy power generation facility with respect to the theoretical maximum output of the new energy power generation facility, and using the analysis result to determine the LFC adjustment power of the power system upside and downside The load frequency control method of the electric power system characterized by the above.
  9. 　請求項６に記載の電力系統の負荷周波数制御方法であって、
    　電力系統における新エネルギー発電設備の出力の予測値と、新エネルギー発電設備の理論的最大出力の予測値から電力系統の上げ側と下げ側のＬＦＣ調整力を決定することを特徴とする電力系統の負荷周波数制御方法。     7. A load frequency control method for a power system according to claim 6, wherein
    The power system's LFC adjustment power is determined from the predicted value of the output of the new energy power generation facility in the power system and the predicted value of the theoretical maximum output of the new energy power generation facility. Load frequency control method.
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