JP2006149150A - Distributed power supply arrangement for grid connection - Google Patents

Distributed power supply arrangement for grid connection Download PDF

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JP2006149150A
JP2006149150A JP2004338900A JP2004338900A JP2006149150A JP 2006149150 A JP2006149150 A JP 2006149150A JP 2004338900 A JP2004338900 A JP 2004338900A JP 2004338900 A JP2004338900 A JP 2004338900A JP 2006149150 A JP2006149150 A JP 2006149150A
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power
frequency
speed command
frequency deviation
operation amount
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Ryosuke Suenaga
良輔 末長
Hitoshi Ito
整 伊藤
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Nishishiba Electric Co Ltd
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Nishishiba Electric Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a distributed power supply arrangement capable of suppressing a short-period power fluctuation by governor free control even during rated operation. <P>SOLUTION: The distributed power supply arrangement comprises a grid-connected generator, a power detecting part for detecting power of the generator, a power controller which acquires a speed command operation amount 1 with a specified power subtracted with a power detected by the power detecting part as an input, a frequency deviation detecting part for detecting frequency deviation, a speed command calculation part which acquires a speed command operation amount 2 from the power operation amount from a limiter circuit, and a governor speed control part which adds the speed command control amount 1 to the speed command control amount 2 for controlling rotational speed of a prime mover. The limiter circuit outputs a negative power operation amount in the case of positive frequency deviation while outputs a positive power operation amount in the case of negative frequency deviation. It further limits the power operation amount not to exceed extra output of the generator, allowing governor free control even during rated operation, thus providing a distributed power supply arrangement of grid connection which can reduce a load of ancillary service. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、電力系統に連系する分散電源装置に関する。   The present invention relates to a distributed power supply device interconnected with a power system.

従来の分散電源装置を、図６の構成図を参照して説明する。
図６において、１７は分散電源装置であり、配電線５を介し変電所４と系統連系を行う。電力検出部６は発電機１０の出力電力を検出する。電力コントローラ７は、あらかじめ設定された所望の電力（Ｐ*）から検出した電力（Ｐ）を減算したものを入力として速度指令操作量１（ΔＮ１）を求める。ガバナ速度指令制御部８は、指令として速度指令操作量１（ΔＮ１）を受け取り原動機９の回転速度を制御する。 A conventional distributed power supply apparatus will be described with reference to the block diagram of FIG.
In FIG. 6, reference numeral 17 denotes a distributed power supply device that performs grid connection with the substation 4 via the distribution line 5. The power detection unit 6 detects the output power of the generator 10. The power controller 7 obtains a speed command manipulated variable 1 (ΔN1) using as an input a value obtained by subtracting the detected power (P) from a preset desired power (P * ). The governor speed command control unit 8 receives a speed command operation amount 1 (ΔN1) as a command and controls the rotational speed of the prime mover 9.

近年、分散電源装置１７のような分散電源装置を系統に連系する事例が増加している。これに対して、電力会社は、電力系統の安定及び電力品質の維持のため行っているアンシラリーサービスにかかる代価を分散電源装置設置者に対し求めている。現在、分散電源装置設置者は特別高圧電線路に接続する場合は、アンシラリーサービス料金を電力会社に支払わなければならない。さらに、平成１７年からは、高圧電線路に接続する場合にもその対象となる。   In recent years, there are an increasing number of cases in which a distributed power supply device such as the distributed power supply device 17 is connected to a system. On the other hand, the electric power company is demanding the price for the ancillary service provided for the stability of the electric power system and the maintenance of the electric power quality from the installer of the distributed power supply device. Currently, distributed power supply installers must pay ancillary service fees to power companies when connecting to extra high piezoelectric lines. Furthermore, from 2005, it becomes the object also when connecting to a high piezoelectric track.

このような背景により、分散電源設置者側でも電力会社が行っているアンシラリーサービスの負担を軽減し系統の安定及び電力品質の維持に寄与する必要性が出てきた。
なお、分散電源装置に関する文献としては、例えば以下に示す特許文献がある。
特開２００１−９５１５７号公報 With this background, it has become necessary to reduce the burden of ancillary service provided by the power company on the distributed power supply side and contribute to the stability of the system and the maintenance of power quality.
In addition, as literature regarding the distributed power supply device, for example, there are the following patent documents.
JP 2001-95157 A

図７は系統の電力変動のイメージ図であり、横軸が時間、縦軸が系統の負荷電力を示している。またΔｔは数十秒の短い周期を示す。この短い周期の負荷電力の変動により発生する系統の周波数変動を、発電機１０の電力を調整することで抑制したい。   FIG. 7 is an image diagram of system power fluctuation, where the horizontal axis represents time and the vertical axis represents the load power of the system. Δt indicates a short period of several tens of seconds. It is desirable to suppress the frequency fluctuation of the system caused by the fluctuation of the load power with a short cycle by adjusting the power of the generator 10.

しかしながら、発電機１０は、ロードリミット運転をしており、定格出力で運転している。ロードリミット運転は、図８のドループ特性において黒丸の箇所にて動作させることである。同図において、横軸が電力、縦軸が周波数を示している。○印方向には電力を変動（低下）させることができても、×方向には電力を変動（上昇）させることができない。したがって、定格電力（Ｐ0）よりも電力を上昇させないロードリミット運転の場合、発電機１０から所望の電力を得ることができない。 However, the generator 10 is performing a load limit operation and is operating at a rated output. The load limit operation is to operate at a black circle in the droop characteristic of FIG. In the figure, the horizontal axis indicates power and the vertical axis indicates frequency. Even if the power can be varied (decreased) in the direction of the circle, it cannot be varied (increased) in the x direction. Therefore, in the case of the load limit operation that does not increase the power above the rated power (P 0 ), the desired power cannot be obtained from the generator 10.

本発明は、上記情況に対処するためになされたもので、その課題は定格運転中においてもガバナフリー制御を行うことができ、短期的な電力変動の系統への影響を抑制することで、電力会社が行っている系統の安定、及び電力品質の維持に寄与し、アンシラリーサービスの負担を軽減することができる分散電源装置を提供することにある。   The present invention has been made in order to cope with the above situation, and the problem is that governor-free control can be performed even during rated operation, and by suppressing the influence of short-term power fluctuations on the system, An object of the present invention is to provide a distributed power supply apparatus that contributes to system stability and power quality maintenance performed by a company and can reduce the burden of ancillary service.

上記課題を解決するために、請求項１に記載の発明は、変電所と配電線を介して系統連系した発電機と、前記発電機を駆動する原動機と、前記発電機の電力を検出する電力検出部と、あらかじめ設定された所望の電力から前記電力検出部で検出した電力を減算したものを入力として速度指令操作量１を求める電力コントローラと、系統の周波数を検出する周波数検出部と、前記周波数検出部にて検出した周波数からその周波数を移動平均処理したものを減算して周波数偏差を検出する周波数偏差検出部と、前記周波数偏差検出部の周波数偏差を入力とし、電力操作量を出力するリミッタ回路と、前記リミッタ回路からの電力操作量より速度指令操作量２を求める速度指令演算部と、前記速度指令演算部にて求めた速度指令操作量２と前記電力コントローラで求めた速度指令操作量１を加算して前記原動機の回転速度を制御するガバナ速度制御部を具備し、前記リミッタ回路は、正の周波数偏差が入力された場合は負の電力操作量を出力し、負の周波数偏差が入力された場合は正の電力操作量を出力し、さらに電力操作量を前記発電機の出力余力以上にならないように制限をかけることを特徴とする。   In order to solve the above-mentioned problem, the invention described in claim 1 detects a power generator connected to a substation and a distribution line, a prime mover driving the power generator, and power of the power generator. A power detection unit, a power controller that obtains a speed command manipulated variable 1 as an input obtained by subtracting power detected by the power detection unit from desired power set in advance, a frequency detection unit that detects a system frequency, A frequency deviation detector that detects a frequency deviation by subtracting a moving average processed frequency from the frequency detected by the frequency detector, and inputs the frequency deviation of the frequency deviation detector, and outputs a power operation amount A speed command operation unit for obtaining a speed command operation amount 2 from a power operation amount from the limiter circuit, a speed command operation amount 2 obtained by the speed command calculation unit, and the power A governor speed control unit that controls the rotational speed of the prime mover by adding the speed command operation amount 1 obtained by the controller, and the limiter circuit generates a negative power operation amount when a positive frequency deviation is input. When a negative frequency deviation is input, a positive power operation amount is output, and further, the power operation amount is limited so as not to exceed the output capacity of the generator.

請求項２に記載の発明は、請求項１に記載の系統連系をする分散電源装置において、
前記周波数偏差検出部は、前記周波数検出部にて検出した周波数をハイパスフィルタのみを介し周波数偏差を検出することを特徴とする。 The invention according to claim 2 is a distributed power supply device having grid interconnection according to claim 1,
The frequency deviation detector detects the frequency deviation of the frequency detected by the frequency detector only through a high-pass filter.

請求項３に記載の発明は、請求項１ないし２に記載の系統連系をする分散電源装置において、
前記リミッタ回路の出力である電力操作量とあらかじめ設定された所望の電力を加算し、さらに前記電力検出部で検出した電力を減算したものを前記電力コントローラに入力し、速度指令操作量１を求めることを特徴とする。 According to a third aspect of the present invention, there is provided a distributed power supply device that performs grid connection according to the first or second aspect of the present invention.
A speed command manipulated variable 1 is obtained by adding the power manipulated variable output from the limiter circuit and a preset desired power and further subtracting the power detected by the power detecting unit to the power controller. It is characterized by that.

本発明の分散電源装置によると、定格運転中においてもガバナフリー制御を行うことができ、短期的な電力変動を抑制することで、電力会社が行っている系統の安定、及び電力品質維持に寄与し、アンシラリーサービスの負担を軽減可能な系統連系をする分散電源装置が提供できる。   According to the distributed power supply device of the present invention, governor-free control can be performed even during rated operation, and by suppressing short-term power fluctuations, it contributes to the stability of the system performed by the power company and the maintenance of power quality. In addition, it is possible to provide a distributed power supply device that is connected to the grid and can reduce the burden of ancillary service.

以下、本発明の最良の実施形態を図を参照して説明する。
（第１実施形態）
図１は、本発明の第１実施形態の構成図であり、既に説明した図６の従来例と同一部分には同一符号を付してその説明を省略し、ここでは異なる部分についてのみ述べる。 Hereinafter, the best embodiment of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a block diagram of a first embodiment of the present invention. The same parts as those of the conventional example of FIG. 6 already described are denoted by the same reference numerals and the description thereof is omitted, and only different parts are described here.

図１において、図６に示した従来の分散電源装置と異なる構成は、系統の周波数を検出する周波数検出部１１と、その周波数（ｆ）からその周波数（ｆ）を移動平均処理部１２１にて移動平均処理したものを減算器１２３にて減算して周波数偏差（Δｆ）を検出する周波数偏差検出部１２と、周波数偏差（Δｆ）より電力操作量（ΔＰ）を出力するリミッタ回路１３と、電力操作量（ΔＰ）より速度指令操作量２（ΔＮ２）を求める速度指令演算部１４と、速度指令操作量２（ΔＮ２）と速度指令操作量１（ΔＮ１）を加算する加算器１５とを備えた点にある。   In FIG. 1, the configuration different from the conventional distributed power supply device shown in FIG. 6 includes a frequency detection unit 11 that detects the frequency of the system, and the frequency (f) from the frequency (f) by the moving average processing unit 121. A frequency deviation detector 12 that detects a frequency deviation (Δf) by subtracting the moving average processed by a subtractor 123, a limiter circuit 13 that outputs a power manipulated variable (ΔP) from the frequency deviation (Δf), and a power A speed command calculation unit 14 that calculates a speed command operation amount 2 (ΔN2) from an operation amount (ΔP), and an adder 15 that adds the speed command operation amount 2 (ΔN2) and the speed command operation amount 1 (ΔN1) are provided. In the point.

次に、本実施形態の作用を説明する。
周波数検出部１１が系統の周波数を検出し、周波数偏差検出部１２が系統の周波数（ｆ）からその周波数（ｆ）を移動平均処理部１２１にて移動平均処理したものを減算して周波数偏差（Δｆ）を検出する。リミッタ回路１３は、周波数偏差（Δｆ）より電力操作量（ΔＰ）を出力し、速度指令演算部１４において、速度指令操作量２（ΔＮ２）を求める。 Next, the operation of this embodiment will be described.
The frequency detection unit 11 detects the frequency of the system, and the frequency deviation detection unit 12 subtracts the frequency (f) of the system from the frequency (f) obtained by the moving average processing unit 121 to subtract the frequency deviation ( Δf) is detected. The limiter circuit 13 outputs the power operation amount (ΔP) from the frequency deviation (Δf), and the speed command calculation unit 14 obtains the speed command operation amount 2 (ΔN2).

以下にリミッタ回路１３と速度指令演算部１４の動作及び演算式を示す。
図２は第１，２，３の実施形態におけるドループ特性の例を表す図である。一般的に発電機は定格電力（Ｐ0）よりも数％の余力がある。その余力分を利用してガバナフリー制御を行う。図２において、定格電力をＰ0とし、余力をｘ％と仮定すると、電力はＰ0＋ｘＰ0／100まで変化させることができる。また、最大周波数をｆm、定格周波数をｆ0とすると、ガバナフリー制御時の周波数偏差Δｆと電力操作量ΔＰの関係式は(1)式となる。

Figure 2006149150
The operations and calculation formulas of the limiter circuit 13 and the speed command calculation unit 14 are shown below.
FIG. 2 is a diagram illustrating an example of droop characteristics in the first, second, and third embodiments. In general, the generator has a margin of several percent of the rated power (P 0 ). The governor-free control is performed using the remaining power. 2, when the rated power and P 0, assuming reserve capacity and x%, power can be varied to P 0 + xP 0/100. Further, when the maximum frequency is f m and the rated frequency is f 0 , the relational expression between the frequency deviation Δf and the power manipulated variable ΔP during the governor-free control is expressed by equation (1).
Figure 2006149150

これらのことから図１のリミッタ回路１３は図３の特性をとるように設計する。

Figure 2006149150
Therefore, the limiter circuit 13 of FIG. 1 is designed so as to have the characteristics of FIG.
Figure 2006149150

また、一般的に周波数ｆと回転数Ｎの関係式は、ｐを発電機１０の極数とすると以下のように表すことができる。

Figure 2006149150
In general, the relational expression between the frequency f and the rotation speed N can be expressed as follows, where p is the number of poles of the generator 10.
Figure 2006149150

(1)式と(2)式より電力操作量ΔＰと速度指令操作量２（ΔＮ２）の関係式は

Figure 2006149150
上記(3)式となる。そして、速度指令演算部１４にて(3)式の演算を行う。その後、加算器１５にて、速度指令操作量１（ΔＮ１）と速度指令操作量２（ΔＮ２）の加算を行い、ガバナ速度制御部８の指令とする。 From equations (1) and (2), the relational expression between power manipulated variable ΔP and speed command manipulated variable 2 (ΔN2) is
Figure 2006149150
 The above equation (3) is obtained. Then, the speed command calculation unit 14 calculates the expression (3). Thereafter, the adder 15 adds the speed command manipulated variable 1 (ΔN1) and the speed command manipulated variable 2 (ΔN2) to obtain a command of the governor speed control unit 8.

以上述べたように、本実施形態による分散電源装置では、定格運転中においてもガバナフリー制御を行うことができ、短期的な電力変動を抑制することで、電力会社が行っている系統の安定、及び電力品質の維持に寄与し、アンシラリーサービスの負担を軽減することができる。   As described above, in the distributed power supply device according to the present embodiment, governor-free control can be performed even during rated operation, and by suppressing short-term power fluctuations, the stability of the system performed by the power company, This contributes to the maintenance of power quality and can reduce the burden of ancillary services.

（第２実施形態）
図４は、本発明の第２実施形態の構成図であり、図１と同一部分には同一符号を付してその説明を省略し、ここでは異なる部分についてのみ述べる。 (Second Embodiment)
FIG. 4 is a configuration diagram of the second embodiment of the present invention. The same parts as those in FIG. 1 are denoted by the same reference numerals and the description thereof is omitted. Only different parts will be described here.

図４において、図１に示した第１実施形態の構成図と異なる構成は、周波数偏差検出部１２において、周波数検出部１１にて検出した周波数（ｆ）からその周波数（ｆ）を移動平均処理部１２１にて移動平均処理したものを減算器１２３にて減算して周波数偏差（Δｆ）を検出する代りに、本実施形態では周波数検出部１１にて検出した周波数（ｆ）をハイパスフィルタ１２２のみを介し周波数偏差を検出するようにした点である。   In FIG. 4, the configuration different from the configuration diagram of the first embodiment shown in FIG. 1 is that the frequency deviation detection unit 12 performs a moving average process on the frequency (f) from the frequency (f) detected by the frequency detection unit 11. Instead of subtracting the frequency average processed by the unit 121 by the subtractor 123 and detecting the frequency deviation (Δf), in this embodiment, the frequency (f) detected by the frequency detection unit 11 is used only for the high-pass filter 122. The frequency deviation is detected through the.

次に、本実施形態の作用について説明する。
周波数検出部１１が系統の周波数を検出し、周波数偏差検出部１２において、周波数検出部１１にて検出した周波数（ｆ）をハイパスフィルタ１２２を介し周波数偏差（Δｆ）を検出する。なお、ハイパスフィルタ１２２は、図７に示すような数十秒程度の短い周期の変動のみを検出するように選定する。 Next, the operation of this embodiment will be described.
The frequency detector 11 detects the frequency of the system, and the frequency deviation detector 12 detects the frequency deviation (Δf) of the frequency (f) detected by the frequency detector 11 via the high-pass filter 122. Note that the high-pass filter 122 is selected so as to detect only fluctuations of a short period of about several tens of seconds as shown in FIG.

リミッタ回路１３は、周波数偏差（Δｆ）より電力操作量（ΔＰ）を出力し、速度指令演算部１４において、速度指令操作量２（ΔＮ２）を求める。そして、速度指令演算部１４にて(3)式の演算を行う。その後、加算器１５にて、速度指令操作量１（ΔＮ１）と速度指令操作量２（ΔＮ２）の加算を行い、ガバナ速度制御部８の指令とする。   The limiter circuit 13 outputs the power operation amount (ΔP) from the frequency deviation (Δf), and the speed command calculation unit 14 obtains the speed command operation amount 2 (ΔN2). Then, the speed command calculation unit 14 calculates the expression (3). Thereafter, the adder 15 adds the speed command manipulated variable 1 (ΔN1) and the speed command manipulated variable 2 (ΔN2) to obtain a command of the governor speed control unit 8.

以上述べたように、本実施形態による分散電源装置では、定格運転中においてもガバナフリー制御を行うことができ、短期的な電力変動を抑制することで、電力会社が行っている系統の安定、及び電力品質の維持に寄与し、アンシラリーサービスの負担を軽減することができる。   As described above, in the distributed power supply device according to the present embodiment, governor-free control can be performed even during rated operation, and by suppressing short-term power fluctuations, the stability of the system performed by the power company, This contributes to the maintenance of power quality and can reduce the burden of ancillary services.

（第３実施形態）
図５は、本発明の第３実施形態の構成図であり、図１と同一部分には同一符号を付してその説明を省略し、ここでは異なる部分についてのみ述べる。 (Third embodiment)
FIG. 5 is a configuration diagram of the third embodiment of the present invention. The same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted. Only different parts will be described here.

図５において、図１に示した第１実施形態と異なる構成は、リミッタ回路１３からの電力操作量Ｐより速度指令操作量２（ΔＮ２）を求める速度指令演算部１４を取り除き、本実施形態ではリミッタ回路１３の出力である電力操作量Ｐを加算器１６に入力として加えるようにした点である。   In FIG. 5, the configuration different from that of the first embodiment shown in FIG. 1 is that the speed command calculation unit 14 for obtaining the speed command manipulated variable 2 (ΔN2) from the power manipulated variable P from the limiter circuit 13 is removed. The power manipulated variable P that is the output of the limiter circuit 13 is added to the adder 16 as an input.

次に、本実施形態の作用について説明する。
周波数検出部１１が系統の周波数を検出し、周波数偏差検出部１２において、周波数検出部１１にて検出した周波数（ｆ）より周波数偏差（Δｆ）を検出する。リミッタ回路１３は、周波数偏差（Δｆ）より電力操作量（ΔＰ）を出力し、加算器１６は、リミッタ回路１３の出力である電力操作量（ΔＰ）とあらかじめ設定された所望の電力（Ｐ*）を加算し、さらに電力検出部６で検出した電力（Ｐ）を減算する。電力コントローラ７は、加算器１６の出力より速度指令操作量１（ΔＮ１）を求め、ガバナ速度制御部８の指令とする。 Next, the operation of this embodiment will be described.
The frequency detector 11 detects the frequency of the system, and the frequency deviation detector 12 detects the frequency deviation (Δf) from the frequency (f) detected by the frequency detector 11. The limiter circuit 13 outputs a power manipulated variable (ΔP) from the frequency deviation (Δf), and the adder 16 outputs a power manipulated variable (ΔP) that is an output of the limiter circuit 13 and a preset desired power (P *). ) And the power (P) detected by the power detector 6 is subtracted. The power controller 7 obtains the speed command operation amount 1 (ΔN1) from the output of the adder 16 and uses it as a command of the governor speed control unit 8.

以上述べたように、本実施形態による分散電源装置では、定格運転中においてもガバナフリー制御を行うことができ、短期的な電力変動を抑制することで、電力会社が行っている系統の安定、及び電力品質の維持に寄与し、アンシラリーサービスの負担を軽減することができる。   As described above, in the distributed power supply device according to the present embodiment, governor-free control can be performed even during rated operation, and by suppressing short-term power fluctuations, the stability of the system performed by the power company, This contributes to the maintenance of power quality and can reduce the burden of ancillary services.

本発明の第１実施形態の構成図。The block diagram of 1st Embodiment of this invention. 本発明の実施形態におけるドループ特性を表す図。The figure showing the droop characteristic in embodiment of this invention. 本発明の実施形態におけるリミッタ回路の詳細図。FIG. 3 is a detailed diagram of a limiter circuit in the embodiment of the present invention. 本発明の第２実施形態の構成図。The block diagram of 2nd Embodiment of this invention. 本発明の第３実施形態の構成図。The block diagram of 3rd Embodiment of this invention. 従来の分散電源装置の構成図。The block diagram of the conventional distributed power supply device. 系統の電力変動のイメージ図。The image figure of the electric power fluctuation of a system. 従来の分散電源装置におけるドループ特性を表す図。The figure showing the droop characteristic in the conventional distributed power supply device.

符号の説明Explanation of symbols

１…系統電源、２…変圧器、３…遮断器、４…変電所、５…配電線、６…電力検出部、７…電力コントローラ、８…ガバナ速度制御部、９…原動機、１０…発電機、１１…周波数検出部、１２…周波数偏差検出部、１３…リミッタ回路、１４…速度指令演算部、１５，１６…加算器、１７…分散電源装置、１２１…移動平均処理部、１２２…ハイパスフィルタ、１２３…減算器、ｆ…周波数、Δｆ…周波数偏差、ｆm…最大周波数、ｆ0…定格周波数、Ｐ…電力、Ｐ*…あらかじめ設定された所望の電力、ΔＰ…電力操作量、Ｐ0…定格電力、ΔＮ１…速度指令操作量１、ΔＮ２…速度指令操作量２。
DESCRIPTION OF SYMBOLS 1 ... System power supply, 2 ... Transformer, 3 ... Circuit breaker, 4 ... Substation, 5 ... Distribution line, 6 ... Electric power detection part, 7 ... Electric power controller, 8 ... Governor speed control part, 9 ... Motor | power_engine, 10 ... Electric power generation 11 ... frequency detector, 12 ... frequency deviation detector, 13 ... limiter circuit, 14 ... speed command calculator, 15, 16 ... adder, 17 ... distributed power supply device, 121 ... moving average processor, 122 ... high pass filter, 123 ... subtractor, f ... frequency, Delta] f ... frequency deviation, f m ... maximum frequency, f 0 ... rated frequency, P ... power, P * ... preset desired power, [Delta] P ... power operation amount, P 0 : Rated power, ΔN1: Speed command operation amount 1, ΔN2: Speed command operation amount 2.

Claims (3)

変電所と配電線を介して系統連系した発電機と、前記発電機を駆動する原動機と、前記発電機の電力を検出する電力検出部と、あらかじめ設定された所望の電力から前記電力検出部で検出した電力を減算したものを入力として速度指令操作量１を求める電力コントローラと、系統の周波数を検出する周波数検出部と、前記周波数検出部にて検出した周波数からその周波数を移動平均処理したものを減算して周波数偏差を検出する周波数偏差検出部と、前記周波数偏差検出部の周波数偏差を入力とし電力操作量を出力するリミッタ回路と、前記リミッタ回路からの電力操作量より速度指令操作量２を求める速度指令演算部と、前記速度指令演算部にて求めた速度指令操作量２と前記電力コントローラで求めた速度指令操作量１を加算して前記原動機の回転速度を制御するガバナ速度制御部を具備し、前記リミッタ回路は、正の周波数偏差が入力された場合は負の電力操作量を出力し、負の周波数偏差が入力された場合は正の電力操作量を出力し、さらに電力操作量を前記発電機の出力余力以上にならないように制限をかけることを特徴とする系統連系をする分散電源装置。   A generator interconnected via a substation and a distribution line, a prime mover for driving the generator, a power detection unit for detecting the power of the generator, and the power detection unit from a predetermined desired power A power controller that obtains a speed command manipulated variable 1 as an input obtained by subtracting the power detected in step 1, a frequency detector that detects the frequency of the system, and a moving average process of the frequency from the frequency detected by the frequency detector A frequency deviation detecting unit that subtracts the frequency deviation to detect a frequency deviation, a limiter circuit that receives the frequency deviation of the frequency deviation detecting unit and outputs a power manipulated variable, and a speed command manipulated variable based on the power manipulated variable from the limiter circuit 2 is obtained by adding the speed command operation amount 2 obtained by the speed command computation unit and the speed command operation amount 1 obtained by the power controller. The limiter circuit outputs a negative power manipulated variable when a positive frequency deviation is input, and positive when a negative frequency deviation is input. A distributed power supply device for grid connection, characterized in that the power manipulated variable is output, and the power manipulated variable is further limited so as not to exceed the output surplus capacity of the generator. 請求項１記載の系統連系をする分散電源装置において、前記周波数偏差検出部は、前記周波数検出部にて検出した周波数をハイパスフィルタのみを介し周波数偏差を検出することを特徴とする系統連系をする分散電源装置。   2. The distributed power supply apparatus for grid interconnection according to claim 1, wherein the frequency deviation detection unit detects the frequency deviation of the frequency detected by the frequency detection unit only through a high-pass filter. Distributed power supply. 請求項１または請求項２記載の系統連系をする分散電源装置において、前記リミッタ回路の出力である電力操作量とあらかじめ設定された所望の電力を加算し、さらに前記電力検出部で検出した電力を減算したものを前記電力コントローラに入力し、速度指令操作量１を求めることを特徴とする系統連系をする分散電源装置。

3. The distributed power supply apparatus for grid connection according to claim 1 or 2, wherein a power operation amount that is an output of the limiter circuit and a preset desired power are added, and the power detected by the power detection unit A distributed power supply apparatus for grid interconnection, characterized in that a speed command manipulated variable 1 is obtained by inputting a value obtained by subtracting the value into the power controller.

JP2004338900A 2004-11-24 2004-11-24 Distributed power supply arrangement for grid connection Pending JP2006149150A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010166666A (en) * 2009-01-14 2010-07-29 Central Res Inst Of Electric Power Ind Power load control device, power load control method, and power load control program

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010166666A (en) * 2009-01-14 2010-07-29 Central Res Inst Of Electric Power Ind Power load control device, power load control method, and power load control program

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