JP2846388B2 - Voltage fluctuation compensator - Google Patents
Voltage fluctuation compensatorInfo
- Publication number
- JP2846388B2 JP2846388B2 JP2026822A JP2682290A JP2846388B2 JP 2846388 B2 JP2846388 B2 JP 2846388B2 JP 2026822 A JP2026822 A JP 2026822A JP 2682290 A JP2682290 A JP 2682290A JP 2846388 B2 JP2846388 B2 JP 2846388B2
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- Prior art keywords
- reactive power
- voltage
- output
- load
- bus
- Prior art date
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- Control Of Voltage And Current In General (AREA)
- Control Of Electrical Variables (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は配電系統の電圧変動を防止するための電圧
変動補償装置に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voltage fluctuation compensating device for preventing a voltage fluctuation in a distribution system.
第５図は例えば三菱電機技法Vo 1.62,No.6,1988,P15
〜20論文の「アクティブフィルタとその応用」に開示さ
れた従来の電圧変動補償装置を示す回路図である。図に
おいて（１）は電源、（２）および（３）は電源系統に
存在するそれぞれ抵抗ＲおよびリアクタンスX,（４）は
負荷側母線で、その電圧Ｖが補償すべき対象の負荷電圧
である。（５）はその電力が変動する負荷、そして
（６）が負荷（５）と並列に負荷側母線（４）に接続さ
れた無効電力補償装置、（７）は負荷検出手段である変
流器（８）および変成器（９）からの検出出力をもとに
無効電力補償装置（６）の出力無効電力−jQCを制御す
る制御装置である。FIG. 5 shows, for example, Mitsubishi Electric Technology Vo 1.62, No. 6, 1988, P15.
FIG. 2 is a circuit diagram showing a conventional voltage fluctuation compensator disclosed in “Active Filters and Their Applications” in 〜20 papers. In the figure, (1) is a power supply, (2) and (3) are resistors R and reactances X and (4), respectively, which are present in the power supply system, and (4) is a load-side bus, whose voltage V is a load voltage to be compensated. . (5) is a load whose power fluctuates, (6) is a reactive power compensator connected to the load-side bus (4) in parallel with the load (5), and (7) is a current transformer as load detecting means. (8) and a control device for controlling the output reactive power -JQ C of the reactive power compensator to the original (6) the detection output from the transformer (9).
上記無効電力補償装置（６）は例えば第６図に示すよ
うに自励式インバータを用いたアクティブフィルタで構
成される。第６図はアクティブフィルタの回路構成を示
す図であり（10a）〜（10c）はリアクトル、（11a）〜
（11f）はトランジスタスイッチ、（12）はコンデン
サ、（13a）と（13b）はアクティブフィルタの出力電力
を検出するための変流器である。また、制御装置（７）
は次の回路で構成される。（14）は変成器（９）で検出
された電圧VAと変流器（８）で検出された電流IAを入力
し負荷の有効電力Ｐと無効電力Ｑを検出する検出回路、
（15）は検出回路（14）の出力値を基準信号とし、変流
器（13）で検出された電流ICをフィードバック信号とし
て出力電流を制御する電流制御回路、（16）は電流制御
回路（15）の出力信号を変調するためのPWM回路であ
り、その出力はトランジスタスイッチ（11a）〜（11f）
のON−OFF信号としてアクティブフィルタ（６）へ与え
られる。The reactive power compensator (6) is composed of, for example, an active filter using a self-excited inverter as shown in FIG. FIG. 6 is a diagram showing the circuit configuration of the active filter, where (10a) to (10c) are reactors, and (11a) to
(11f) is a transistor switch, (12) is a capacitor, and (13a) and (13b) are current transformers for detecting the output power of the active filter. The control device (7)
Is composed of the following circuits. (14) a detection circuit which receives the voltage VA detected by the transformer (9) and the current IA detected by the current transformer (8), and detects active power P and reactive power Q of the load;
(15) is a current control circuit that controls the output current using the output value of the detection circuit (14) as a reference signal and the current IC detected by the current transformer (13) as a feedback signal, and (16) is a current control circuit ( 15) is a PWM circuit for modulating the output signal, and the output is a transistor switch (11a) to (11f)
Is supplied to the active filter (6) as an ON-OFF signal.
次に動作について説明する。第６図においてコンデン
サ（12）に充電されている直流電圧Edはトランジスタス
イッチ（11a）〜（11f）によりPWM変調され、V1なる交
流電圧に変換される。Next, the operation will be described. DC voltage Ed which is charged in the capacitor (12) in Figure 6 is PWM-modulated by the transistor switch (11a) ~ (11f), is converted to V 1 becomes alternating voltage.
この電圧V1はリアクトル（10）を介して負荷側母線
（４）に供給される。従って、アクティブフィルタ
（６）の動作は第７図の等価回路で表わすことができ、
第８図（ａ）に示すようにアクティブフィルタの出力電
圧V1を負荷母線電圧Ｖより大きくすると進相無効電力を
アクティブフィルタに流し、また、同図（ｂ）に示すよ
うにアクティブフィルタの出力電圧V1を負荷母線電圧Ｖ
より小さくすると遅相無効電力をアクティブフィルタに
流すように動作する。The voltages V 1 is supplied through a reactor (10) to the load side bus (4). Therefore, the operation of the active filter (6) can be represented by the equivalent circuit of FIG.
When the output voltage V 1 of the active filter as shown in FIG. 8 (a) larger than the load bus voltage V phase lead flowing a reactive power to the active filter, The output of the active filter as shown in FIG. (B) the voltage V 1 load bus voltage V
If it is smaller, it operates so that the late-phase reactive power flows through the active filter.
次に無効電力補償装置（６）による電圧変動補償方法
について説明する。第９図は負荷電圧Ｖ、補償無効電力
QC及び電源側無効電力QOの時間経過を示したタイムチャ
ート図である。今、電源系統の抵抗をＲ（％）（10MVA
ベース）、リアクタンスをＸ（％）（10MVAベース）と
し、時刻Ｔ＝T1まで無負荷であったものが、時刻Ｔ＝T1
で有効電力Ｐ（KW）、無効電力Ｑ（KVAR）の負荷が投入
されたとする。この負荷投入により、負荷電圧Ｖは次式
で示す△Ｖだけ降下する。（第９図（ａ）） △Ｖ＝（Ｒ・Ｐ＋Ｘ・Ｑ）×10-4 制御装置（７）はこの負荷の有効電力Ｐと無効電力Ｑ
検出回路（14）により検出して直ちに電流制御回路（1
5）及びPWM制御回路（16）を調整し、上記電圧降下△Ｖ
を零にするように次式で求まる進相無効電力QC（KVAR）
を時刻T2以降に無効電力補償装置（６）に流す。（第９
図（ｂ）） △Ｖ＝｛Ｒ・Ｐ＋Ｘ・（Ｑ−QC）｝×10-4 ＝０ 従って、 無効電力補償装置（６）は常に上記出力を出し続けな
ければ電圧を保てないため、装置容量や出力は大きなも
のが常に必要となる。Next, a voltage fluctuation compensation method by the reactive power compensator (6) will be described. Fig. 9 shows the load voltage V and the reactive reactive power
Is a time chart showing the time course of Q C and the power supply-side reactive power Q O. Now, set the resistance of the power system to R (%) (10MVA
Base), reactance X (%) (those 10MVA base), and was unloaded to a time T = T 1 is time T = T 1
Suppose that a load of active power P (KW) and reactive power Q (KVAR) is applied. By this load application, the load voltage V drops by ΔV shown in the following equation. (FIG. 9 (a)) ΔV = (RP + XQ) × 10 -4 The control device (7) uses the active power P and the reactive power Q of this load.
The current control circuit (1
5) and adjust the PWM control circuit (16) to make the above voltage drop △ V
Leading reactive power Q C (KVAR) determined by the following equation so that
Flowing through the reactive power compensation device to the time T 2 or later (6). (9th
Figure (b)) △ V = { R · P + X · (Q-Q C)} × 10 -4 = 0 Therefore, The reactive power compensator (6) cannot maintain the voltage unless the output is constantly output, so that a large device capacity and output are always required.
従来の電圧補償装置は以上のように構成されているの
で、負荷電圧を一定に保とうとすると、常に無効電力補
償装置（６）の出力を出し続ける必要があり、無効電力
補償装置（６）の装置容量や出力が大きくなるという課
題があった。Since the conventional voltage compensator is configured as described above, if the load voltage is to be kept constant, the output of the reactive power compensator (6) must be constantly output. There was a problem that the device capacity and output increased.
この発明は以上のような課題を解消するためになされ
たもので、無効電力補償装置の容量、出力を節約し、且
つ負荷電圧の変動を補償することが出来る電圧変動補償
装置を得ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a voltage fluctuation compensating device capable of saving the capacity and output of a reactive power compensating device and compensating a load voltage fluctuation. And
〔課題を解決するための手段〕 この発明の請求項１に係る電圧変動補償装置は、電圧
調整器より負荷側の母線の電圧及び電流と無効電力補償
装置の出力電力とを入力し、前記無効電力補償装置の出
力を該無効電力補償装置のみで前記母線電圧変動を低減
する大きさから前記電圧調整器の応動時間以上の時間を
かけて漸減して零に近づけるように前記無効電力補償装
置を制御する制御手段を設け、前記無効電力補償装置の
出力が零に近づくにつれ前記電圧調整器が電圧変動低減
動作を繰り返すようにしたものである。又、この発明の
請求項２に係る電圧変動補償装置は、電圧調整器より負
荷側の母線の電圧及び電流と無効電力補償装置の出力電
力とを入力し、前記無効電力補償装置の出力を該無効電
力補償装置のみで前記母線電圧変動を低減する大きさか
ら前記電圧調整器の応動時間以上の時間をかけて段階的
に漸減して零に近づけるように前記無効電力補償装置を
制御する制御手段を設け、前記無効電力補償装置の出力
が零に近づくにつれ前記電圧調整器が電圧変動低減動作
を繰り返すようにしたものである。[Means for Solving the Problems] A voltage fluctuation compensating apparatus according to claim 1 of the present invention receives a voltage and a current of a bus on a load side from a voltage regulator and an output power of a reactive power compensating apparatus, and The reactive power compensator is configured so that the output of the power compensator is gradually reduced from the magnitude of reducing the bus voltage fluctuation only by the reactive power compensator to a value close to zero over a time equal to or longer than the response time of the voltage regulator. Control means for controlling is provided, and the voltage regulator repeats the voltage fluctuation reducing operation as the output of the reactive power compensator approaches zero. The voltage fluctuation compensator according to claim 2 of the present invention receives the voltage and current of the bus on the load side from the voltage regulator and the output power of the reactive power compensator, and outputs the output of the reactive power compensator. Control means for controlling the reactive power compensator so that the reactive power compensator is gradually reduced from the magnitude of reducing the bus voltage fluctuation only with the reactive power compensator to a value close to zero over a period of time equal to or longer than the response time of the voltage regulator. And the voltage regulator repeats the voltage fluctuation reducing operation as the output of the reactive power compensator approaches zero.
この発明の請求項１に係る電圧変動補償装置において
は、負荷の過渡的な変化による電圧変動は、電圧変動発
生に即応して無効電力補償装置が作動し、爾後、無効電
力補償装置の出力を前記電圧調整器の応動時間以上の時
間をかけて漸減して零に近づける制御が行われ、その結
果、母線電圧を問題のない範囲で積極的に変動させて前
記電圧調整器の動作を誘発し、該電圧調整器の動作が、
前記無効電力補償装置の出力が漸減して零に近づく過程
で繰り返し行われ、定常的には電圧調整器で負荷側母線
電圧が所定電圧に維持され、従って、無効電力補償装置
は負荷の過渡的な変化による電圧変動を補償するに必要
な容量に容量低減できると共に、装置内部の損失も低減
できる。又、この発明の請求項２に係る電圧変動補償装
置においては、負荷の過渡的な変化による電圧変動は、
電圧変動発生に即応して無効電力補償装置が作動し、爾
後、無効電力補償装置の出力を前記電圧調整器の応動時
間以上の時間をかけて漸減して零に近づける制御が行わ
れ、その結果、母線電圧を問題のない範囲で積極的に変
動させて前記電圧調整器の動作を誘発し、該電圧調整器
の動作が、前記無効電力補償装置の出力が漸減して零に
近づく過程で繰り返し行われ、定常的には電圧調整器で
負荷側母線電圧が所定電圧に維持され、従って、無効電
力補償装置は負荷の過渡的な変化による電圧変動を補償
するに必要な容量に容量低減できると共に、装置内部の
損失も低減でき、しかも電圧調整器が応動するまでに、
前記無効電力補償装置の出力漸減による負荷側母線電圧
の変動が不必要に増大するのは抑制される。In the voltage fluctuation compensating apparatus according to claim 1 of the present invention, the voltage fluctuation due to the transient change of the load is activated by the reactive power compensating apparatus in response to the occurrence of the voltage fluctuation, and thereafter, the output of the reactive power compensating apparatus is changed. Control is performed so that the voltage gradually decreases and approaches zero over a period of time equal to or longer than the response time of the voltage regulator, and as a result, the bus voltage is positively changed within a range in which there is no problem to induce the operation of the voltage regulator. The operation of the voltage regulator is
The process is repeatedly performed while the output of the reactive power compensator gradually decreases and approaches zero, and the load-side bus voltage is constantly maintained at a predetermined voltage by the voltage regulator. The capacity can be reduced to a capacity necessary for compensating for voltage fluctuations due to various changes, and the loss inside the device can be reduced. Further, in the voltage fluctuation compensating device according to claim 2 of the present invention, the voltage fluctuation due to the transient change of the load is:
The reactive power compensator is activated in response to the occurrence of the voltage fluctuation, and thereafter, the output of the reactive power compensator is gradually reduced over a period of time equal to or more than the response time of the voltage regulator to control the output to approach zero. The bus voltage is positively varied within a problem-free range to induce the operation of the voltage regulator, and the operation of the voltage regulator is repeated while the output of the reactive power compensator gradually decreases to approach zero. This is performed, and the load-side bus voltage is normally maintained at a predetermined voltage by the voltage regulator, so that the reactive power compensator can reduce the capacity to the capacity required to compensate for the voltage fluctuation due to the transient change of the load. , The loss inside the device can be reduced, and before the voltage regulator responds,
Unnecessary increase in the fluctuation of the load-side bus voltage due to the gradual decrease of the output of the reactive power compensator is suppressed.
以下、この発明の一実施例を図について説明する。第
１図において、（17）はタップ切替器、（18）は電圧変
成器、（19）はタップ制御回路、（20）は（17）〜（1
9）で構成される電圧調整器である。また、（21）は負
荷（５）の無効電力を検出する負荷側無効電力検出回
路、（22）は負荷（５）の有効電力を検出する負荷側有
効電力検出回路、（23）は無効電力補償装置（６）の電
流を検出する電流変成器、（24）は無効電力補償装置
（６）の無効電力出力を検出する出力無効電力検出回
路、（25）は積分回路、（26）は補償容量演算回路、
（27）は補償容量演算回路（26）の出力値を基準信号と
し、変流器（13）で検出された電流ICをフィードバック
信号として出力電流を制御する電流制御回路である。ま
た、（28）は電流制御回路（27）の出力信号を変調する
ためのPWM回路であり、その出力はトランジスタ（11a）
〜（11f）のON−OFF信号としてアクティブフィルタから
なる無効電力補償装置（６）（６）へ与えられる。An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, (17) is a tap changer, (18) is a voltage transformer, (19) is a tap control circuit, and (20) is (17) to (1).
This is a voltage regulator consisting of 9). Also, (21) is a load-side reactive power detection circuit that detects reactive power of the load (5), (22) is a load-side active power detection circuit that detects active power of the load (5), and (23) is reactive power. A current transformer for detecting the current of the compensator (6), (24) an output reactive power detection circuit for detecting the reactive power output of the reactive power compensator (6), (25) an integrating circuit, and (26) a compensation Capacity calculation circuit,
(27) is a current control circuit for a reference signal to control the output current of the current I C which is detected by the current transformer (13) as a feedback signal the output value of the compensation capacity calculation circuit (26). Further, (28) is a PWM circuit for modulating the output signal of the current control circuit (27), and its output is a transistor (11a)
(11f) are supplied to the reactive power compensators (6) and (6) each comprising an active filter as ON-OFF signals.
次に動作について説明する。従来の装置との動作の違
いを説明するために第９図と同様のタイムチャート（第
２図）を用いて第１図の動作を説明する。第２図におい
て時刻Ｔ＝T1まで無負荷であったもので時刻Ｔ＝T1で有
効電力Ｐ（KW）、無効電力Ｑ（KVAR）の負荷が投入され
ると時刻T2以降に、負荷側無効電力検出回路（21）によ
り無効電力Ｑを検出し、負荷側有効電力検出回路（22）
により有効電力Ｐを検出する。Next, the operation will be described. The operation of FIG. 1 will be described using a time chart (FIG. 2) similar to FIG. 9 to explain the difference in operation from the conventional apparatus. At time T = to T 1 time in what was unloaded T = T 1 in active power P (KW), the load reactive power Q (KVAR) is turned time T 2, after the second diagram, the load The reactive power Q is detected by the reactive power detection circuit on the load side (21), and the active power detection circuit on the load side (22) is detected.
To detect the active power P.
一方、第１図において、無効電力補償装置（６）の電
流を検出する電流変成器（23）を介して検出した電流を
入力として補償出力無効電力検出回路（24）で電源側無
効電力QOを求める。無効電力検出回路（24）の出力QOは
次段の積分回路（25）へ入力され、時定数TIで積分され
た後、積分出力QIを補償容量演算回路（26）へ入力す
る。On the other hand, in FIG. 1, a current detected through a current transformer (23) for detecting a current of the reactive power compensator (6) is input and a compensation output reactive power detection circuit (24) supplies a reactive power Q O on the power supply side. Ask for. The output Q O of the reactive power detection circuit (24) is input to the integration circuit (25) in the next stage, and after being integrated by the time constant T I , the integrated output Q I is input to the compensation capacity calculation circuit (26).
補償容量演算回路（26）では次式の演算を行う。 The compensation capacity calculation circuit (26) performs the following calculation.
この補償容量演算回路（26）の出力QMは電流基準信号
として次段の電流制御回路（27）へ入力され、電流制御
回路（27）とPWM回路（28）により無効電力補償装置
（６）にQMに等しい無効電力−jQCを流すように制御す
るのは第５図に示す従来の無効電力補償装置と同様であ
る。 The output Q M of the compensation capacity calculation circuit (26) is input as a current reference signal to the next stage of the current control circuit (27), the current control circuit (27) and the reactive power compensator by the PWM circuit (28) (6) is the same as that of the conventional reactive power compensation apparatus shown in FIG. 5 to control such flow of reactive power -JQ C equal to Q M in.
第２図の時間T2の直後においては時定数の関係で積分
回路（25）はまだその出力QIがほとんど０の状態になっ
ているので、T2直後の補償容量演算回路（26）の出力は を出力することになり、従って無効電力補償装置（６）
の出力QCも第２図（ｂ）のように を出力することになる。この結果、負荷（５）のＰとＱ
による電圧降下を０に抑えるように動作することは従来
の無効電力補償装置と同様である。Since Immediately after time T 2 of the second view integration circuit in relation to the time constant (25) is still its output Q I becomes almost 0 state, T 2 compensation capacity calculation circuit immediately after the (26) The output is And thus the reactive power compensator (6)
Also the output Q C as in the second view (b) Will be output. As a result, P and Q of the load (5)
The operation that suppresses the voltage drop due to the above to zero is the same as the conventional reactive power compensator.
この無効電力補償装置（６）の無効電力出力QCは無効
電力検出回路（24）で検出され積分回路（25）におい
て、時定数TIで積分されるため、積分回路（25）の出力
QIは補償容量演算回路（26）において、減算され次式の
ような演算を行う。In this reactive power compensator reactive power Q C is detected by the reactive power detection circuit (24) integrating circuit (6) (25), to be integrated with a time constant T I, the output of the integrating circuit (25)
Q I in the compensation capacity calculation circuit (26) is subtracted performs the following calculation equation.
従って時刻T2以降で積分回路（25）の出力QIが時定数
TIで増加してくるにつれ徐々に補償容量演算回路（26）
の出力QMが減少し、無効電力補償装置（６）の出力QCは
徐々に低下してくることになる。この結果、第２図
（ａ）に示すように負荷電圧ＶもQCの低下に伴って徐々
に下がってくるが、負荷電圧Ｖの低下は電圧調整器（2
0）の電圧変成器（18）により検出されタップ制御回路
（19）に入力される。タップ切替えの下限値VLに達した
時にタップ制御回路（19）はタップ切替え器（17）にタ
ップ上昇信号を出力し、時刻T3においてタップを一段上
げるように動作する。この結果、負荷電圧Ｖは第２図に
示すように時刻T3においてタップ上昇分△VSだけ上昇す
る。時刻T3以降さらに無効電力補償装置（６）の出力QC
が減少してくると再び負荷電圧Ｖは時刻T4においてタッ
プ切替えの下限値VLに達すると再びもう一段タップを上
げて電圧を△VSだけ更に持上げるように動作する。この
ようにして無効電力補償装置（６）の出力QCを徐々に減
少させそれによる電圧の低下分を電圧調整器（20）のタ
ップを上げることにより負荷電圧は一定範囲内に入るよ
うに動作することになる。無効電力補償装置（６）の出
力QCを減少させていき、定常的にはQCが０になった時に
積分回路（25）は積分動作を停止するため、無効電力出
力QOを０にした状態で落ちつくことになる。従って、定
常的には無効電力補償装置（６）の出力はQC＝０とな
る。この結果、電源インピーダンスによる電圧降下はほ
とんど電圧調整装置（20）で補償できることになる。換
言すれば第２図にも示されているように電圧調整器（2
0）より負荷側の母線の電圧及び電流と無効電力補償装
置（６）の出力電力とを入力し、前記無効電力補償装置
（６）の出力を該無効電力補償装置（６）のみで前記母
線電圧変動を低減する大きさから前記電圧調整器（20）
の応動時間以上の時間をかけて漸減して零に近づけるよ
うに前記無効電力補償装置（６）を制御する制御手段
（24）（25）（26）（27）（28）を設け、前記無効電力
補償装置（６）の出力が零に近づくにつれ前記電圧調整
器（20）が電圧変動低減動作を繰り返すようにしたもの
であり、このようにすることにより、負荷の過渡的な変
化による電圧変動は、電圧変動発生に即応して無効電力
補償装置（６）が作動し、爾後、無効電力補償装置
（６）の出力を前記電圧調整器（20）の応動時間以上の
時間をかけて漸減して零に近づける制御が行われ、その
結果、母線電圧を問題のない範囲で積極的に変動させて
前記電圧調整器（20）の動作を誘発し、該電圧調整器
（20）の動作が、前記無効電力補償装置（６）の出力が
漸減して零に近づく過程で繰り返し行われ、定常的には
電圧調整器（20）で負荷側母線電圧が所定電圧に維持さ
れ、従って、無効電力補償装置（６）は負荷の過渡的な
変化による電圧変動を補償するに必要な容量に容量低減
できると共に、装置内部の損失も低減できる。 Time constant output Q I of thus time T 2, after the integration circuit (25)
Compensation capacitance operation circuit gradually as T I increases (26)
Output Q M is reduced, the output Q C of the reactive power compensator (6) gradually becomes to come with decreased. As a result, even the load voltage V as shown in FIG. 2 (a) come down gradually with a decrease in Q C, but drop in load voltage V voltage regulator (2
0) is detected by the voltage transformer (18) and input to the tap control circuit (19). Outputs a tap-up signal to the tap control circuit (19) is tapped switcher (17) when it reaches the lower limit value V L of the switching taps, operates to increase one step the tap at time T 3. As a result, the load voltage V increases by tapping rise △ V S at time T 3 as illustrated in Figure 2. Output Q C at time T 3 after further reactive power compensator (6)
There decreased come again load voltage V is raised again another stage tap when at time T 4 reaches the lower limit value V L of the switching taps operates to only further raise △ V S voltage. Load voltage by increasing the taps of the thus reactive power compensator (6) of the output Q C gradually voltage regulator to decrease amount of a voltage caused thereby reducing (20) is operated to be within a predetermined range Will do. Gradually decreases the output Q C of the reactive power compensator (6), the integration circuit (25) when the constant of Q C becomes 0 to stop the integration operation, the reactive power Q O 0 I will calm down in a state where I did it. Therefore, the output of the reactive power compensator (6) normally becomes Q C = 0. As a result, the voltage drop due to the power source impedance can be almost completely compensated by the voltage regulator (20). In other words, as shown in FIG. 2, the voltage regulator (2
0) The voltage and current of the bus on the load side and the output power of the reactive power compensator (6) are input, and the output of the reactive power compensator (6) is input to the bus only by the reactive power compensator (6). Voltage regulator (20) from the magnitude of reducing voltage fluctuations
Control means (24), (25), (26), (27), and (28) for controlling the reactive power compensator (6) so as to gradually decrease and approach zero over a response time of at least The voltage regulator (20) repeats the voltage fluctuation reducing operation as the output of the power compensator (6) approaches zero, whereby the voltage fluctuation due to the transient change of the load is achieved. The reactive power compensator (6) is activated in response to the occurrence of the voltage fluctuation, and thereafter, the output of the reactive power compensator (6) is gradually reduced over a period of time longer than the response time of the voltage regulator (20). As a result, the bus voltage is positively fluctuated within a range in which there is no problem, thereby inducing the operation of the voltage regulator (20), and the operation of the voltage regulator (20) The process is repeated while the output of the reactive power compensator (6) gradually decreases and approaches zero. This is performed, and the load-side bus voltage is constantly maintained at a predetermined voltage by the voltage regulator (20). Therefore, the reactive power compensator (6) is required to compensate for the voltage fluctuation due to the transient change of the load. The capacity can be reduced, and the loss inside the device can be reduced.
上述の第１の実施例では無効電力補償装置（６）の出
力QCを減少させる時定数は積分回路（25）の時定数TIに
より決まり、もし、電圧調整器（20）のタップ切替えに
要する時間遅れが上記積分回路（25）の時定数TIに比べ
て長いような場合にはタップの切替えのための応答時間
が無効電力補償装置（６）の出力QCの低下の時定数に追
いつかず、その結果、負荷電圧Ｖを必要以上に低下させ
てしまう可能性がある。これを解決したのがこの発明の
第２の実施例であり、第２の実施例を示す回路図を第３
図に示す。The time constant for reducing the output Q C of the reactive power compensator in the first embodiment described above (6) is determined by the constant T I of the integrating circuit (25), if the switching taps of the voltage regulator (20) the time constant of decrease in the output Q C response time var compensator (6) for the time delay in the case that longer than the constant T I when the integrating circuit (25) of the tap changer needed As a result, the load voltage V may be unnecessarily lowered. The second embodiment of the present invention solves this problem. A circuit diagram showing the second embodiment is shown in FIG.
Shown in the figure.
第３図では第１図の第１の実施例に加えて電圧変動検
出回路（29）、変換回路（30）、リミッタ回路（31）、
減算回路（32）及び積分回路（33）が追加されている。In FIG. 3, in addition to the first embodiment of FIG. 1, a voltage fluctuation detection circuit (29), a conversion circuit (30), a limiter circuit (31),
A subtraction circuit (32) and an integration circuit (33) are added.
以下にこの動作について説明する。第４図の時刻T1で
負荷が投入されると、まず負荷無効電力検出回路（21）
と負荷有効電力検出回路（22）が動作し、無効電力補償
装置の出力QCは時刻T2の直後において となり負荷（５）のＰとＱによる電圧降下を０に抑える
ように動作する。この後、無効電力出力QCが出力無効電
力検出回路（24）で検出され積分回路（25）において時
定数TIで積分される。Hereinafter, this operation will be described. When the load is turned at time T 1 of the FIG. 4, first, the load reactive power detection circuit (21)
Load active power detection circuit (22) operates, the output Q C of the reactive power compensator is immediately after the time T 2, And operates to suppress the voltage drop due to P and Q of the load (5) to zero. Thereafter, the integrated constant T I when the detected in reactive power Q C is output reactive power detection circuit (24) integrating circuit (25).
積分回路（25）の出力QIは補償容量演算回路（26）に
おいて の演算を行うことにより時刻T2以降で積分回路（25）の
出力QIが時定数TIで増加してくるにつれて徐々にQMが減
少し、無効電力補償装置（６）の出力QCは第４図（ｂ）
のように徐々に低下してくる。この結果、第４図（ａ）
のように負荷電圧ＶはQCの低下に伴って徐々に下ってく
るが、この負荷電圧Ｖの低下分は電圧変動検出回路（2
9）で検出され、その検出値VDは次段の変換回路（30）
へ入力され、VDに相当した無効電力量QD に変換される。一方、補償出力無効電力検出回路（24）
の出力QCはリミッタ回路（31）へ入力され、その出力QN
はQC≧＋QLIMITの時はQN＝＋QLIMIT＋QLIMIT＞QC＞−Q
LIMITの時はQN＝QC−QLIMIT＞QCの時はQN＝−QLIMITと
なるようにQCの上限値と下限値に制限が与えられる。Output Q I of the integrator circuit (25) in the compensation capacity calculation circuit (26) Output Q C of the integrating circuit at time T 2, after by performing the calculation of gradual Q M decreases, the reactive power compensation device as the output Q I come increased by the time constant T I (25) (6) Is FIG. 4 (b)
It gradually decreases like. As a result, FIG.
Load the voltage V is coming down gradually with a decrease in Q C, decrement the voltage variation detecting circuit of the load voltage V as shown in (2
Detected in 9), the detected value V D is the next stage of the conversion circuit (30)
Are input to the reactive power was equivalent to V D amount Q D Is converted to Meanwhile, the compensation output reactive power detection circuit (24)
Output Q C of are input to the limiter circuit (31), the output Q N
When Q C ≧ + Q LIMIT , Q N = + Q LIMIT + Q LIMIT > Q C > −Q
When LIMIT is given a limit to the upper limit value and the lower limit value of Q N = Q C -Q LIMIT> Q Q C such that Q N = -Q LIMIT when the C.
ここでQCの制限値QLIMITは次のように決定される。Here limit value Q LIMIT of Q C is determined as follows.
△VLIMIT＝Ｘ・QLIMIT 但し、△VLIMITは負荷電圧Ｖの許容変動巾、Ｘは配電
線のリアクタンス分、リミッタ回路（31）の出力QNは次
段の減算回路（32）において変換回路（30）の出力QDと
減算され、減算回路（32）の出力（QN−QD）が積分回路
（33）において時定数TVで積分される。積分回路（33）
の出力QVは補償容量演算回路（26）に入力され なる演算を行われる。無効電力補償装置（６）では上式
のQMに相当した無効電力QCを出力することは前述の第１
の実施例と同様である。△ V LIMIT = X · Q LIMIT However, △ V LIMIT conversion allowable variation width of the load voltage V, X is the reactance component of distribution lines, at the output Q N of the limiter circuit (31) is the next stage of the subtracting circuit (32) is subtracted to the output Q D of the circuit (30), the output of the subtracting circuit (32) (Q N -Q D) is integrated in the constant T V time in the integration circuit (33). Integrator (33)
The output Q V of the input to the compensation capacity calculation circuit (26) Is performed. Var compensator (6) first to output the reactive power Q C which corresponds to Q M of the above formula described above in
This is the same as the embodiment.
このように負荷電圧Ｖの電圧変動VDを検出し、電圧変
動の許容値△VLIMITに相当するQLIMITからVDに相当する
無効電力QDを差引いたものとを積分演算しているため無
効電力補償装置（６）の出力QCを徐々に低下するに伴な
い負荷電圧Ｖが低下してくるがVLIMITより低くなろうと
すると積分回路（33）の入力（QN−QD）が負になり、積
分回路（33）の出力QVはそれ以上補償容量QCを低下させ
ないように動作するため電圧変動許容値を超える電圧の
低下は防止される。一方、電圧調整器（20）のタップ切
替え下限値はVLIMITを超えない範囲で設定しているので
タップ制御回路の応答が追いついた時点でタップが上昇
し負荷電圧Ｖが補償されていくのは第１の実施例と同様
である。換言すれば第４図にも示されているように電圧
調整器（20）より負荷側の母線の電圧及び電流と無効電
力補償装置（６）の出力電力とを入力し、前記無効電力
補償装置（６）の出力を該無効電力補償装置（６）のみ
で前記母線電圧変動を低減する大きさから前記電圧調整
器（20）の応動時間以上の時間をかけて段階的に漸減し
て零に近づけるように前記無効電力補償装置（６）を制
御する制御手段（24）（25）（26）（27）（28）（29）
（30）（31）（32）（33）を設け、前記無効電力補償装
置（６）の出力が零に近づくにつれ前記電圧調整器（2
0）が電圧変動低減動作を繰り返すようにしたものであ
り、このようにすることにより、負荷の過渡的な変化に
よる電圧変動は、電圧変動発生に即応して無効電力補償
装置（６）が作動し、爾後、無効電力補償装置（６）の
出力を前記電圧調整器（20）の応動時間以上の時間をか
けて段階的に漸減して零に近づける制御が行われ、その
結果、母線電圧を問題のない範囲で積極的に変動させて
前記電圧調整器（20）の動作を誘発し、該電圧調整器
（20）の動作が、前記無効電力補償装置（６）の出力が
漸減して零に近づく過程で繰り返し行われ、定常的には
電圧調整器（20）で負荷側母線電圧が所定電圧に維持さ
れ、従って、無効電力補償装置（６）は負荷の過渡的な
変化による電圧変動を補償するに必要な容量に容量低減
できると共に、装置内部の損失も低減でき、しかも電圧
調整器（20）が応動するまでに、前記無効電力補償装置
（６）の出力漸減による負荷側母線電圧の変動が不必要
に増大するのを抑制できる。Thus to detect a voltage variation V D of the load voltage V, because of the integral operation and minus the reactive power Q D corresponding the Q LIMIT corresponding to the allowable value △ V LIMIT of the voltage variation in V D input of Ban no load voltage V to gradually decreases the output Q C of the reactive power compensator (6) is lowered but that to become lower than V LIMIT integrating circuit (33) (Q N -Q D) is becomes negative, the output Q V of the integrating circuit (33) decrease in the voltage exceeding the allowable voltage fluctuation to operate so as not to reduce the more compensation capacitor Q C is prevented. On the other hand, the tap switching lower limit of the voltage regulator (20) is set within the range not exceeding V LIMIT , so the tap rises and the load voltage V is compensated when the response of the tap control circuit catches up. This is the same as the first embodiment. In other words, as shown in FIG. 4, the voltage and current of the bus on the load side and the output power of the reactive power compensator (6) are inputted from the voltage regulator (20), and the reactive power compensator is inputted. The output of (6) is gradually reduced from zero to reduce the bus voltage fluctuation only by the reactive power compensator (6) to zero by gradually increasing the response time of the voltage regulator (20). Control means (24), (25), (26), (27), (28), (29) for controlling the reactive power compensator (6) so that they approach each other.
(30), (31), (32), and (33), and as the output of the reactive power compensator (6) approaches zero, the voltage regulator (2)
0) repeats the voltage fluctuation reducing operation, whereby the voltage fluctuation due to the transient change of the load causes the reactive power compensator (6) to operate in response to the occurrence of the voltage fluctuation. Thereafter, control is performed such that the output of the reactive power compensator (6) gradually decreases gradually to approach zero over a period of time equal to or more than the response time of the voltage regulator (20). As a result, the bus voltage is reduced. The voltage regulator (20) is positively fluctuated within a range without any problem to induce the operation of the voltage regulator (20), and the operation of the voltage regulator (20) becomes zero when the output of the reactive power compensator (6) gradually decreases. , And the load-side bus voltage is constantly maintained at a predetermined voltage by the voltage regulator (20). Therefore, the reactive power compensator (6) detects the voltage fluctuation due to the transient change of the load. The capacity can be reduced to the capacity required for compensation, and Loss can be reduced, moreover until the voltage regulator (20) is responsive, possible to prevent the variation of the load bus voltage by the output gradual decrease in the reactive power compensator (6) is increased unnecessarily.
なお、上記実施例では無効電力補償装置としてアクテ
ィブフィルタを用いた場合について示したが、サイリス
タスイッチでコンデンサやリアクトルを制御する方式の
無効電力補償装置であっても良い。また、電圧調整器と
してはタップ切替え方式に限らず、他の電圧を制御する
手段であっても良く、上記実施例と同様の効果を奏す
る。In the above embodiment, the case where an active filter is used as the reactive power compensating device has been described. However, a reactive power compensating device in which a thyristor switch controls a capacitor or a reactor may be used. Further, the voltage regulator is not limited to the tap switching method, but may be a unit for controlling another voltage, and has the same effect as the above embodiment.
以上のように、請求項１の発明は、電圧調整器より負
荷側の母線の電圧及び電流と無効電力補償装置の出力電
力とを入力し、前記無効電力補償装置の出力を該無効電
力補償装置のみで前記母線電圧変動を低減する大きさか
ら前記電圧調整器の応動時間以上の時間をかけて漸減し
て零に近づけるように前記無効電力補償装置を制御する
制御手段を設け、前記無効電力補償装置の出力が零に近
づくにつれ前記電圧調整器が電圧変動低減動作を繰り返
すようにしたので、負荷の過渡的な変化による電圧変動
は、電圧変動発生に即応して無効電力補償装置が低減
し、爾後、無効電力補償装置の出力を前記電圧調整器の
応動時間以上の時間をかけて漸減して零に近づける制御
が行われ、母線電圧を問題のない範囲で積極的に変動さ
せて前記電圧調整器の動作を誘発し、該電圧調整器の動
作が、前記無効電力補償装置の出力が漸減して零に近づ
く過程で繰り返し行われ、定常的には電圧調整器で負荷
側母線電圧を所定電圧に維持でき、その結果、無効電力
補償装置は負荷の過渡的な変化による電圧変動を補償す
るに必要な容量に容量低減できると共に、装置内部の損
失も低減できるという効果がある。また、請求項２の発
明は、電圧調整器より負荷側の母線の電圧及び電流と無
効電力補償装置の出力電力とを入力し、前記無効電力補
償装置の出力を該無効電力補償装置のみで前記母線電圧
変動を低減する大きさから前記電圧調整器の応動時間以
上の時間をかけて段階的に漸減して零に近づけるように
前記無効電力補償装置を制御する制御手段を設け、前記
無効電力補償装置の出力が零に近づくにつれ前記電圧調
整器が電圧変動低減動作を繰り返すようにしたので、負
荷の過渡的な変化による電圧変動は、電圧変動発生に即
応して無効電力補償装置が作動し、爾後、無効電力補償
装置の出力を前記電圧調整器の応動時間以上の時間をか
けて段階的に漸減して零に近づける制御が行われ、母線
電圧を問題のない範囲で積極的に変動させて前記電圧調
整器の動作を誘発し、該電圧調整器の動作が、前記無効
電力補償装置の出力が漸減して零に近づく過程で繰り返
し行われ、定常的には電圧調整器で負荷側母線電圧を所
定電圧に維持でき、その結果、無効電力補償装置は負荷
の過渡的な変化による電圧変動を補償するに必要な容量
に容量低減できると共に、装置内部の損失も低減でき、
しかも電圧調整器が応動するまでに、前記無効電力補償
装置の出力漸減による負荷側母線電圧の変動が不必要に
増大するのを抑制できるという効果がある。As described above, according to the first aspect of the present invention, the voltage and current of the bus on the load side from the voltage regulator and the output power of the reactive power compensator are input, and the output of the reactive power compensator is used as the reactive power compensator. Control means for controlling the reactive power compensator so as to gradually reduce the voltage to a value close to zero over a period of time equal to or longer than the response time of the voltage regulator from the magnitude of reducing the bus voltage fluctuation only by the reactive power compensation. As the output of the device approaches zero, the voltage regulator repeats the voltage fluctuation reducing operation, so that the voltage fluctuation due to the transient change of the load is reduced by the reactive power compensator in response to the voltage fluctuation, Thereafter, control is performed to gradually decrease the output of the reactive power compensator to zero over a period of time equal to or more than the response time of the voltage regulator, and positively fluctuate the bus voltage within a range in which there is no problem. Vessel The operation of the voltage regulator is repeatedly performed while the output of the reactive power compensator gradually decreases and approaches zero, and the voltage regulator constantly maintains the load-side bus voltage at a predetermined voltage. As a result, the reactive power compensating device has the effects of reducing the capacity required to compensate for voltage fluctuations due to transient changes in the load, and also reducing the loss inside the device. Also, the invention of claim 2 is that the voltage and current of the bus on the load side from the voltage regulator and the output power of the reactive power compensator are input, and the output of the reactive power compensator is output only by the reactive power compensator. Control means for controlling the reactive power compensating device so as to gradually decrease gradually to approach zero over a period of time equal to or longer than the response time of the voltage regulator from the magnitude of reducing the bus voltage fluctuation; As the output of the device approaches zero, the voltage regulator repeats the voltage fluctuation reducing operation, so that the voltage fluctuation due to the transient change of the load, the reactive power compensator operates in response to the occurrence of the voltage fluctuation, Thereafter, control is performed such that the output of the reactive power compensator gradually decreases gradually and approaches zero over a period of time equal to or longer than the response time of the voltage regulator, and the bus voltage is positively varied within a range in which there is no problem. The voltage The operation of the voltage regulator induces the operation of the voltage regulator, and the operation of the voltage regulator is repeatedly performed while the output of the reactive power compensator gradually decreases and approaches zero. As a result, the reactive power compensator can reduce the capacity to the capacity required to compensate for the voltage fluctuation due to the transient change of the load, and also reduce the loss inside the device,
Moreover, there is an effect that the fluctuation of the load-side bus voltage due to the gradual decrease of the output of the reactive power compensator can be prevented from being unnecessarily increased before the voltage regulator responds.
第１図はこの発明の第１の実施例による電圧変動補償装
置を示す回路図、第２図（ａ）（ｂ）は上記第１の実施
例の動作を示す動作タイムチャート、第３図はこの発明
の第２の実施例による電圧変動補償装置を示す回路図、
第４図（ａ）（ｂ）は上記第２の実施例の動作を示す動
作タイムチャート、第５図は従来の電圧変動補償装置を
示す回路図、第６図は無効電力補償装置の構成図、第７
図はアクティブフィルタの等価回路、第８図（ａ）
（ｂ）はアクティブフィルタの出力関係を示す波形図、
第９図（ａ）（ｂ）は従来の電圧変動補償装置の動作を
示す動作タイムチャートである。 （１）は電源、（２）は抵抗、（３）はリアクタンス、
（４）は負荷側母線、（５）は負荷、（６）は無効電力
補償装置、（７）は制御装置、（８）は変流器、（９）
は変成器、（10）はリアクトル、（11）はトランジスタ
スイッチ、（12）はコンデンサ、（13）は変流器、（1
4）は検出回路、（15）は電流制御回路、（16）はPWM回
路、（17）はタップ切替器、（18）は電圧変成器、（1
9）はタップ制御回路、（20）は（17）〜（19）で構成
される電圧調整器、（21）は負荷側無効電力検出回路、
（22）は負荷側有効電力検出回路、（23）は電流変成
器、（24）は補償出力無効電力検出回路、（25）は積分
回路、（26）は補償容量演算回路、（27）は電流制御回
路、（28）はPWM回路、（29）は電圧変動検出回路、（3
0）は変換回路、（31）はリミッタ回路、（32）は減算
回路、（33）は積分回路。 なお、図中、同一符号は同一、又は相当部分を示す。FIG. 1 is a circuit diagram showing a voltage fluctuation compensator according to a first embodiment of the present invention, FIGS. 2A and 2B are operation time charts showing the operation of the first embodiment, and FIG. FIG. 4 is a circuit diagram showing a voltage fluctuation compensating device according to a second embodiment of the present invention;
4 (a) and 4 (b) are operation time charts showing the operation of the second embodiment, FIG. 5 is a circuit diagram showing a conventional voltage fluctuation compensator, and FIG. 6 is a configuration diagram of a reactive power compensator. , Seventh
The figure is the equivalent circuit of the active filter, Fig. 8 (a)
(B) is a waveform diagram showing the output relationship of the active filter,
FIGS. 9A and 9B are operation time charts showing the operation of the conventional voltage fluctuation compensating device. (1) is power supply, (2) is resistance, (3) is reactance,
(4) load side bus, (5) load, (6) reactive power compensator, (7) controller, (8) current transformer, (9)
Is a transformer, (10) is a reactor, (11) is a transistor switch, (12) is a capacitor, (13) is a current transformer, (1)
4) is a detection circuit, (15) is a current control circuit, (16) is a PWM circuit, (17) is a tap changer, (18) is a voltage transformer, (1)
9) is a tap control circuit, (20) is a voltage regulator composed of (17) to (19), (21) is a load-side reactive power detection circuit,
(22) is a load-side active power detection circuit, (23) is a current transformer, (24) is a compensation output reactive power detection circuit, (25) is an integration circuit, (26) is a compensation capacity calculation circuit, and (27) is Current control circuit, (28) PWM circuit, (29) voltage fluctuation detection circuit, (3
0) is a conversion circuit, (31) is a limiter circuit, (32) is a subtraction circuit, and (33) is an integration circuit. In the drawings, the same reference numerals indicate the same or corresponding parts.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山田 満寿夫 愛知県名古屋市緑区大高町字北関山20番 地の１ 中部電力株式会社技術開発本部 電力技術研究所内 (72)発明者 竹田 正俊 兵庫県神戸市兵庫区和田崎町１丁目１番 ２号 三菱電機株式会社神戸製作所内 (72)発明者 熊谷 剛 兵庫県神戸市兵庫区和田崎町１丁目１番 ２号 三菱電機株式会社神戸製作所内 (56)参考文献 特開 昭52−12447（ＪＰ，Ａ) 特開 昭58−54414（ＪＰ，Ａ) 特開 平２−129709（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) G05F 1/70────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masuda Yamada 1 at Kita-Kanzan, 20-chome, Odaka-cho, Midori-ku, Nagoya-shi, Aichi Electric Power Research Laboratory, Chubu Electric Power Co., Inc. 1-1-2, Wadazaki-cho, Hyogo-ku, Kobe-shi, Japan Inside Mitsubishi Electric Corporation Kobe Works (72) Inventor Tsuyoshi Kumagai 1-2-1, Wadasaki-cho, Hyogo-ku, Hyogo-ku, Hyogo Prefecture Inside Kobe Works, Mitsubishi Electric Corporation (56) reference Patent Sho 52-12447 (JP, a) JP Akira 58-54414 (JP, a) JP flat 2-129709 (JP, a) (58 ) investigated the field (Int.Cl. 6 , DB name) G05F 1/70
Claims (2)
路となる母線に接続された無効電力補償装置、この無効
電力補償装置の前記母線との接続点より前記電源側に接
続され前記母線電圧の変動に応動して該母線電圧変動を
低減する電圧調整器、及びこの電圧調整器より前記負荷
側の母線の電圧及び電流と前記無効電力補償装置の出力
電力とを入力し、前記無効電力補償装置の出力を該無効
電力補償装置のみで前記母線電圧変動を低減する大きさ
から前記電圧調整器の応動時間以上の時間をかけて漸減
して零に近づけるように前記無効電力補償装置を制御す
る制御手段を備え、前記無効電力補償装置の出力が零に
近づくにつれ前記電圧調整器が電圧変動低減動作を繰り
返す電圧変動補償装置。1. A reactive power compensator connected to a bus serving as a power supply path from a power supply to a load in a power distribution system, wherein the reactive power compensator is connected to the power supply side from a connection point of the reactive power compensator with the bus. A voltage regulator for reducing the bus voltage fluctuation in response to fluctuations, and a voltage and current of the bus on the load side and an output power of the reactive power compensator from the voltage regulator; Control for controlling the reactive power compensating device so that the output of the reactive power compensating device is gradually reduced from the magnitude of reducing the bus voltage fluctuation only by the reactive power compensating device to a value close to zero over time longer than the response time of the voltage regulator. A voltage fluctuation compensating device comprising: a voltage regulator that repeats a voltage fluctuation reducing operation as the output of the reactive power compensating device approaches zero.
路となる母線に接続された無効電力補償装置、この無効
電力補償装置の前記母線との接続点より前記電源側に接
続され前記母線電圧の変動に応動して該母線電圧変動を
低減する電圧調整器、及びこの電圧調整器より前記負荷
側の母線の電圧及び電流と前記無効電力補償装置の出力
電力とを入力し、前記無効電力補償装置の出力を該無効
電力補償装置のみで前記母線電圧変動を低減する大きさ
から前記電圧調整器の応動時間以上の時間をかけて段階
的に漸減して零に近づけるように前記無効電力補償装置
を制御する制御手段を備え、前記無効電力補償装置の出
力が零に近づくにつれ前記電圧調整器が電圧変動低減動
作を繰り返す電圧変動補償装置。2. A reactive power compensator connected to a bus serving as a power supply path from a power supply to a load in a power distribution system, wherein the reactive power compensator is connected to the power supply side from a connection point of the reactive power compensator with the bus. A voltage regulator for reducing the bus voltage fluctuation in response to fluctuations, and a voltage and current of the bus on the load side and an output power of the reactive power compensator from the voltage regulator; The reactive power compensating device so that the output of the reactive power compensating device is gradually reduced gradually from the magnitude of reducing the bus voltage fluctuation only by the reactive power compensating device over a period of time equal to or more than the response time of the voltage regulator to approach zero. A voltage fluctuation compensating device comprising control means for controlling, wherein the voltage regulator repeats a voltage fluctuation reducing operation as the output of the reactive power compensating device approaches zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2026822A JP2846388B2 (en) | 1990-02-05 | 1990-02-05 | Voltage fluctuation compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2026822A JP2846388B2 (en) | 1990-02-05 | 1990-02-05 | Voltage fluctuation compensator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03230207A JPH03230207A (en) | 1991-10-14 |
| JP2846388B2 true JP2846388B2 (en) | 1999-01-13 |
Family
ID=12203971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2026822A Expired - Lifetime JP2846388B2 (en) | 1990-02-05 | 1990-02-05 | Voltage fluctuation compensator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2846388B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684887A (en) * | 2016-12-20 | 2017-05-17 | 国家电网公司 | Low-voltage line distributed compensation control device |
-
1990
- 1990-02-05 JP JP2026822A patent/JP2846388B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03230207A (en) | 1991-10-14 |
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