JPH05130738A - Automatic power supply system - Google Patents
Automatic power supply systemInfo
- Publication number
- JPH05130738A JPH05130738A JP3205518A JP20551891A JPH05130738A JP H05130738 A JPH05130738 A JP H05130738A JP 3205518 A JP3205518 A JP 3205518A JP 20551891 A JP20551891 A JP 20551891A JP H05130738 A JPH05130738 A JP H05130738A
- Authority
- JP
- Japan
- Prior art keywords
- total demand
- phase
- voltage
- characteristic coefficient
- reactive power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は予め設定している母線の
目標電圧値や線路の目標無効電力値が予め設定してある
許容偏差幅から逸脱している監視点に対して、複数の調
相機器から効果の最も大きい機器を選択制御することに
より逸脱を解消する電圧・無効電力制御処理機能をもつ
自動給電システムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of adjustment points for monitoring points where a preset target voltage value of a bus and a target reactive power value of a line deviate from a preset allowable deviation width. The present invention relates to an automatic power supply system having a voltage / reactive power control processing function that eliminates deviations by selectively controlling a device having the greatest effect from phase devices.
【０００２】[0002]
【従来の技術】従来、自動給電システムにおいて、電圧
・無効電力制御方法のアルゴリズムを下記に説明する。 先ず、電力系統の状態として、監視点電圧・無効電力
値を取り込む。 次に、下記に示す目的関数Ｅ式(1) を計算する。 Ｖi ：現在電圧・無効電力値 Ｖiref：目標電圧・無効電力値 εi ：許容偏差幅 ｎ：監視点の数 ただし、｜Ｖi −Ｖiref｜−εi ＜０場合、 ｜Ｖi −Ｖiref｜−εi ＝０とする。 計算した目的関数Ｅの値が０であるかどうか判断し、０
であれば監視点の電圧・無効電力値が目標内にあるもの
とし処理を終了する。０でない場合は以下の処理を行な
う。 複数の調相機器からどれを選択するかは、下記に示す
評価式ｄＥ／ｄＸiの最大の操作点のものを選択し目標
内に近づける。 Ｖi ：現在電圧・無効電力値 Ｖiref：目標電圧・無効電力値 εi ：許容偏差幅 ｎ：監視点の数 ｊ：操作点 Ａij：系統特性係数2. Description of the Related Art Conventionally, an algorithm of a voltage / reactive power control method in an automatic power supply system will be described below. First, the monitoring point voltage / reactive power value is taken in as the state of the power system. Next, the objective function E formula (1) shown below is calculated. V i : Current voltage / reactive power value V iref : Target voltage / reactive power value ε i : Allowable deviation width n: Number of monitoring points where | V i −V iref | −ε i <0, | V i − Let V iref | −ε i = 0. Judge whether the calculated value of the objective function E is 0, and
If so, it is determined that the voltage / reactive power value at the monitoring point is within the target, and the process ends. If it is not 0, the following processing is performed. As to which of the plurality of phase adjusting devices is to be selected, the one having the maximum operating point of the evaluation formula dE / dX i shown below is selected and brought close to the target. V i : Current voltage / reactive power value V iref : Target voltage / reactive power value ε i : Allowable deviation width n: Number of monitoring points j: Operating point A ij : System characteristic coefficient
【０００３】上記Ａij：系統特性係数とは、計算時点に
おける制御対象機器の調整量に対する監視点の電圧、ま
たは無効電力の変化量比率のことである。選択した操作
機器を単位量操作し、系統特性定数を用いて、操作後の
監視点電圧・無効電力を下記式にて計算する。 Ｖinew＝Ｖiold＋Ａij＊ΔＸj ………式(3) Ｖinew：調相機器操作後電圧 Ｖiold：調相機器操作前電圧 ΔＸj ：調相機器調整量 上記に戻り、式(1) のＶi に上記式(3) で計算した
Ｖinewを代入し、目的関数Ｅが０に収束したか判断し、
そうでなければ上記を繰り返し行なう。目的関数Ｅ
が０に収束した時点で終了し、選択した調相機器を制御
することにより監視点の電圧・無効電力を目標内に収め
るようにしていた。また、上記式(2) の系統特性係数Ａ
ijに予め設定している値Ｃijを掛け合わせした値（Ａij
＊Ｃij）を計算に使用することによってｄＥ／ｄＸi を
補正することにより上記アルゴリズムが特定の調相機器
を選択しやすいようや、その逆になるようにしている例
もある。更に、上記アルゴリズムと併せて、運転員が系
統状態に見合うように手動で補正を加えている。The above-mentioned A ij : system characteristic coefficient is the ratio of the change amount of the voltage at the monitoring point or the reactive power to the adjustment amount of the controlled device at the time of calculation. Operate the selected operation device by a unit amount, and calculate the monitoring point voltage and reactive power after operation using the system characteristic constants using the following formula. V inew = V iold + A ij * ΔX j (Equation (3)) V inew : Voltage after operation of the phase adjusting device V iold : Voltage before operation of the phase adjusting device ΔX j : Adjustment amount of the phase adjusting device Substituting V inew calculated by the above equation (3) into V i of), it is judged whether the objective function E converges to 0,
Otherwise, repeat the above. Objective function E
When the voltage converges to 0, it ends, and the voltage and reactive power at the monitoring point are kept within the target by controlling the selected phase adjusting device. Also, the system characteristic coefficient A in the above equation (2)
ij multiplied by a preset value C ij (A ij
There is also an example in which * C ij ) is used in the calculation to correct dE / dX i so that the above algorithm can easily select a specific phase adjusting device and vice versa. Further, in addition to the above algorithm, the operator manually makes a correction to match the system condition.
【０００４】[0004]
【発明が解決しようとする課題】上記従来の無効電力補
償（ＶＱＣ）では、監視点に対して系統特性係数の大き
い調相機器から順に選択するもので、特定の調相機器に
制御が偏り、偏った機器はメンテナンス周期が早くなる
ため、コストが高くなる。本発明は上記事情に鑑みてな
されたものであり、ＶＱＣ制御の制御調相機器選択時
に、電力系統状態と調相機器の動作回数を考慮した上
で、調相機器の選択を行なうことによって、電力系統状
態に即した調相機器の制御平均化のできる自動給電シス
テムを提供することを目的としている。In the above-mentioned conventional reactive power compensation (VQC), the phase-adjusting device having a larger system characteristic coefficient is selected in order from the monitoring point, and the control is biased to a specific phase-adjusting device. Unbalanced equipment has a faster maintenance cycle, resulting in higher costs. The present invention has been made in view of the above circumstances, and when selecting a control phase adjusting device for VQC control, the phase selecting device is selected by considering the power system state and the number of times the phase modifying device operates. It is an object of the present invention to provide an automatic power supply system capable of controlling and averaging phase-modulating devices according to the state of the power system.
【０００５】[0005]
【課題を解決するための手段】本発明では、電力系統の
情報を入力データとして取り込む入力装置と、電力系統
を構成する設備に関するデータベースと、ＶＱＣ処理
と、総需要予測処理と、調相機器を制御する制御装置と
により構成される自動給電システムにおいて、前記総需
要予測処理より出力されるｎ分先総需要予測を保存する
保存部、前記ＶＱＣ処理により調相機器の動作回数を保
存する保存部とを用い、系統特性係数を補正保存する系
統特性係数補正処理とから構成した。 ［作用］ 電力系統の状態に関する情報を入力装置を経由して電子
計算機に入力する。先ず、総需要予測処理を行ない、ｎ
分先総需要予測値をｎ分先総需要予測値保存部に保存す
る。次に受け取った情報と電力系統を構成する機器の情
報を記憶する設備データベースとを用いて、ＶＱＣ処理
を行なう。ＶＱＣ処理では、先ず、各監視点に対する系
統特性係数を計算保存する。次に系統特性係数補正処理
に、ｎ分先総需要予測保存部と調相機器動作回数を入力
し、系統特性係数を補正し保存部を更新する。次に目標
値から逸脱している監視点の電圧・無効電力に対して、
その監視点に対する逸脱を解消するための効果最大の調
相機器を、保存している系統特性係数を用い効果量を計
算し調相機器を選択する。選択した調相機器の動作回数
を調相機器動作回数保存部を更新する。更に選択した調
相機器を制御装置に入力し電力系統を制御する。この一
連の領域を繰り返す。According to the present invention, there are provided an input device for taking in information of a power system as input data, a database regarding facilities constituting the power system, a VQC process, a total demand forecasting process, and a phase adjusting device. In an automatic power supply system including a control device for controlling, a storage unit for storing the n-minute ahead total demand forecast output from the total demand forecasting process, and a storage unit for storing the number of operation of the phase adjusting device by the VQC process. , And system characteristic coefficient correction processing for correcting and storing the system characteristic coefficient. [Operation] Information regarding the state of the power system is input to the electronic computer via the input device. First, the total demand forecasting process is performed, and n
The minute-by-minute total demand forecast value is stored in the n-minute-ahead total demand forecast value storage unit. Next, the VQC process is performed using the received information and the facility database that stores the information of the devices forming the power system. In the VQC processing, first, the system characteristic coefficient for each monitoring point is calculated and stored. Next, in the system characteristic coefficient correction process, the n-minute ahead total demand forecast storage unit and the number of times of operation of the phase adjusting device are input, the system characteristic coefficient is corrected, and the storage unit is updated. Next, for the voltage / reactive power at the monitoring point that deviates from the target value,
The phase-adjusting device having the maximum effect for eliminating deviation from the monitoring point is calculated by using the stored system characteristic coefficient, and the phase-adjusting device is selected. The operation number of the selected phase adjusting device is updated in the phase adjusting device operation number storage unit. Further, the selected phase adjusting device is input to the control device to control the power system. This series of regions is repeated.
【０００６】[0006]
【実施例】以下図面を参照して実施例を説明する。図１
は本発明による自動給電システムの一実施例の構成図で
ある。図１において、１は電力系統で、これは電流，電
圧等の電気的数値データを検出するＣＴ，ＰＴ等の検出
器，しゃ断器，断路器，調相機器，変圧器，線路，母線
等の設備より構成される。２は電力系統１の観測情報を
取り込むための入力装置、３は電力系統１の情報を基に
電圧無効電力制御処理を行なう電子計算機、４は電子計
算機３の処理結果を基に電力系統の制御を行なう制御装
置である。Embodiments will be described below with reference to the drawings. Figure 1
FIG. 1 is a configuration diagram of an embodiment of an automatic power supply system according to the present invention. In FIG. 1, 1 is an electric power system, which is a detector such as CT or PT for detecting electrical numerical data such as current or voltage, a circuit breaker, a disconnector, a phase adjusting device, a transformer, a line, a bus bar, or the like. Composed of equipment. Reference numeral 2 is an input device for fetching observation information of the power system 1, 3 is an electronic computer that performs voltage reactive power control processing based on the information of the power system 1, and 4 is control of the power system based on the processing result of the computer 3. Is a control device for performing.
【０００７】電子計算機３は電力系統１の設備に関する
情報やＶＱＣ処理に関するデータを保存する設備データ
ベース保存部31と、電力系統１から入力されたデータや
設備データベースを用いて電圧無効電力制御を行なう
と、ＶＱＣ処理32により選択されたＳＣやＳＨＲやＬＲ
Ｔを動作回数として保存する調相機器動作回数保存部33
と、ｎ分先の総需要値を予測するｎ分先総需要予測処理
34と、ｎ分先総需要予測処理34により予測されたｎ分先
総需要値を保存するｎ分先総需要予測値保存部35と、ｎ
分先総需要予測値保存部35と調相機器動作回数保存部33
とを使用して系統特性係数の補正を出力する系統特性係
数補正処理36と、ＶＱＣ処理32により各調相機器が各監
視点に対しての投入効果を保存し、系統特性係数補正処
理36によりその保存された情報を補正し更新保存される
系統特性係数保存部37から構成される。When the electronic computer 3 performs voltage reactive power control using the facility database storage unit 31 that stores information on facilities of the power system 1 and data on VQC processing, and the data and facility database input from the power system 1. , SC, SHR and LR selected by VQC processing 32
Modulator operation count storage unit 33 that stores T as the operation count
And n minutes ahead total demand forecasting process to forecast the total demand value ahead n minutes
34, an n-minute ahead total demand forecast value storage unit 35 for storing the n-minute ahead total demand forecast value predicted by the n-minute ahead total demand forecast processing 34, and
Fractional aggregate demand forecast value storage unit 35 and phase-modulation equipment operation count storage unit 33
By using the system characteristic coefficient correction processing 36 that outputs the correction of the system characteristic coefficient, and the VQC processing 32, each phase adjusting device stores the input effect to each monitoring point, and the system characteristic coefficient correction processing 36 The system characteristic coefficient storage unit 37 is configured to correct the stored information and update and store the information.
【０００８】図２は上記構成を有する自動給電システム
のＶＱＣ処理32と系統特性係数補正処理36の処理を示す
フローチャートであり、これらを用いて作用説明する。
なお、ｎ分先総需要予測処理34は、ＶＱＣ処理32と系統
特性係数補正処理36と平行して処理を行ない、常にｎ分
先総需要予測値保存部35にｎ分先総需要予測値を更新保
存しているものとする。また、この処理は、既に知識工
学を用いた方法やアルゴリズムにより予測する方法が提
案されている。入力装置２から、電力系統の情報が電子
計算機３に入力されると、現在状況把握処理S21 を行な
う。現在状況把握処理では、開閉器情報による電力系
統設備の接続状態の把握、母線・線路電圧や線路・変
圧器潮流の把握、発電機の運転状態の把握、ＳＣ・
ＳＨＲの入／切状態の把握、ＬＲＴのタップ位置の把
握を行なう。FIG. 2 is a flow chart showing the processing of the VQC processing 32 and the system characteristic coefficient correction processing 36 of the automatic power feeding system having the above-mentioned configuration, and the operation will be described using these.
Note that the n-minute-ahead total demand forecasting process 34 performs processing in parallel with the VQC process 32 and the system characteristic coefficient correction process 36, and always stores the n-minute-ahead total demand forecast value in the n-minute-ahead total demand forecast value storage unit 35. It is assumed that the update has been saved. In addition, for this processing, a method using knowledge engineering or a method of predicting by an algorithm has already been proposed. When the information of the electric power system is input to the computer 3 from the input device 2, the present situation grasping process S21 is performed. In the current situation grasping process, grasping the connection state of the power system equipment from the switch information, grasping the bus / line voltage and line / transformer power flow, grasping the operating state of the generator, SC
Check the on / off state of SHR and the tap position of LRT.
【０００９】この処理が終了すると、系統特性係数計算
処理S22 を行なう。系統特性係数計算処理では、先ず、
系統接続状態からノードインピーダンス行列を計算す
る。その結果より、操作点ｊに単位電流（ΔＩj ＝１）
を注入したときの操作点ｊの電圧・無効電力変化Δ
Ｖj 、監視点ｉの電圧・無効電力変化ΔＶi とすると、
制御対象機器の単位調整量に対する監視点の電圧・無効
電力の変化量比率である系統特性係数Ａijを下記のよう
計算する。 Ａij＝ΔＶi ／ΔＶj When this process ends, a system characteristic coefficient calculation process S22 is performed. In the system characteristic coefficient calculation process, first,
The node impedance matrix is calculated from the grid connection state. From the result, the unit current (ΔI j = 1) is applied to the operating point j.
Of voltage and reactive power at operating point j when injected
If V j is the voltage / reactive power change ΔV i at the monitoring point i,
The system characteristic coefficient A ij , which is the change rate ratio of the voltage / reactive power at the monitoring point to the unit adjustment amount of the control target device, is calculated as follows. A ij = ΔV i / ΔV j
【００１０】この処理が終了すると、系統特性係数補正
処理S23 を行なう。系統特性係数補正処理では、S22 で
算出された系統特性係数に対し、ｎ分先総需要予測値と
現在の総需要値の差がある一定値より大きい場合、調相
機器の動作回数に関係なく、S22 で算出された系統特性
係数をそのまま、系統特性係数保存部へ保存する。ま
た、ｎ分先総需要値と現在の総需要がある一定値より小
さい場合、調相機器の動作回数がある一定値より大きい
ものについては、S22 で算出された系統特性係数を小さ
くするようある一定値を乗じ、見かけ上、電圧・無効電
力制御効果が小さくなるよう補正を行なった上で、系統
特性係数保存部へ保存する。Upon completion of this processing, system characteristic coefficient correction processing S23 is performed. In the system characteristic coefficient correction processing, if the difference between the n-minute ahead total demand forecast value and the current total demand value is greater than a certain value with respect to the system characteristic coefficient calculated in S22, regardless of the number of times the phase-modulating equipment has operated. , The system characteristic coefficient calculated in S22 is stored in the system characteristic coefficient storage unit as it is. If the total demand value n minutes ahead and the current total demand are smaller than a certain value, the system characteristic coefficient calculated in S22 may be made smaller for the number of operations of the phase-adjusting device that is larger than a certain value. It is multiplied by a fixed value, corrected to reduce the apparent voltage / reactive power control effect, and then stored in the system characteristic coefficient storage unit.
【００１１】この処理が終了すると、電圧・無効電力偏
差の計算と調整量の算出処理S24 を行なう。S24 ではS2
3 により補正された系統特性係数を用い、制御対象の調
相機器をどれだけ制御すれば、目標電圧・無効電力値か
らの許容偏差内に入るかを計算する。この処理が終了す
ると、S24で選択された調相機器の制御処理S25 を行な
う。上記の一連の処理を繰り返す。When this processing is completed, voltage / reactive power deviation calculation and adjustment amount calculation processing S24 is performed. S2 is S2
Using the system characteristic coefficient corrected by 3, calculate how much the controlled phase-modulating device should be controlled within the allowable deviation from the target voltage / reactive power value. When this processing ends, control processing S25 of the phase adjusting device selected in S24 is performed. The above series of processing is repeated.
【００１２】本実施例によれば、総需要の変化と調相機
器の動作回数を考慮することにより、電圧・無効電力が
大きく変化すると予測される場合には、最も効果の大き
い制御を、また電圧・無効電力の変化が大きくないと予
測される場合には、特定の調相機器に偏らない制御を行
なうことができる。According to this embodiment, when the voltage / reactive power is expected to change significantly by taking into consideration the change in the total demand and the number of operations of the phase-adjusting device, the most effective control, When it is predicted that the change in voltage / reactive power is not large, it is possible to perform control that is not biased to a specific phase adjusting device.
【００１３】[0013]
【発明の効果】以上説明したように、本発明によれば電
力系統の総需要変化と調相機器の動作回数を考慮するこ
とにより、系統特性係数を補正し、電力系統の電圧・無
効電力制御の効果を失うことなく、調相機器の動作回数
の平均化を行なうことができ、電力の安定供給及び調相
機器のメンテナンスコスト低減ができる。As described above, according to the present invention, the system characteristic coefficient is corrected and the voltage / reactive power control of the power system is performed by considering the total demand change of the power system and the operation frequency of the phase adjusting device. It is possible to average the number of times of operation of the phase adjusting device without losing the effect of, and it is possible to supply power stably and reduce the maintenance cost of the phase adjusting device.
【図１】本発明による自動給電システムの一実施例の構
成図。FIG. 1 is a configuration diagram of an embodiment of an automatic power supply system according to the present invention.
【図２】図１の処理を示すフローチャート。FIG. 2 is a flowchart showing the processing of FIG.
１ 電力系統 ２ 入力装置 ３ 電子計算機 ４ 出力手段 31 設備データベース保存部 32 ＶＱＣ処理 33 調相機器動作回数保存部 34 ｎ分先総需要予測処理 35 ｎ分先総需要予測値保存部 36 系統特性係数補正処理 37 系統特性係数保存部 1 power system 2 input device 3 electronic computer 4 output means 31 facility database storage unit 32 VQC processing 33 phase adjuster operation count storage unit 34 n minutes ahead total demand forecast processing 35 n minutes ahead total demand forecast value storage unit 36 system characteristic coefficient Correction process 37 System characteristic coefficient storage section
───────────────────────────────────────────────────── フロントページの続き (72)発明者 井上 紀宏 愛知県名古屋市緑区大高町字北関山20番地 の１ 中部電力株式会社電力技術研究所内 (72)発明者 興梠 裕保 東京都府中市東芝町１番地 株式会社東芝 府中工場内 (72)発明者 島田 和恵 東京都府中市東芝町１番地 株式会社東芝 府中工場内 (72)発明者 永田 淳一 東京都港区芝浦一丁目１番１号 株式会社 東芝本社事務所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norihiro Inoue No. 20 Kitakanzan, Otaka-cho, Midori-ku, Nagoya-shi, Aichi Chubu Electric Power Co., Inc. Electric Power Technology Laboratory (72) Inventor Yuho Kojogi Toshiba, Fuchu, Tokyo Town No. 1 in Toshiba Fuchu factory (72) Inventor Kazue Shimada No. 1 in Toshiba Town Fuchu, Tokyo Inside Fuchu factory, Toshiba (72) Inventor Junichi Nagata 1-1-1 Shibaura, Minato-ku, Tokyo Toshiba headquarters office
Claims (1)
と、この入力装置から入力される系統情報が予め設定し
てある許容偏差幅から逸脱している監視点に対して、複
数の調相器から効果の最も大きい機器を選択制御するこ
とにより電圧・無効電力制御処理を行なう自動給電シス
テムにおいて、ｎ分先総需要予測処理手段と、電圧・無
効電力制御に際して選択制御された調相機器の動作回数
を保存する調相機器動作回数保存部と、ｎ分先総需要予
測処理により予測した値を記憶するｎ分先総需要予測値
保存部と、前記保存された調相機器動作回数及びｎ分先
総需要予測値を入力して系統特性係数を補正する系統特
性係数補正処理手段とからなることを特徴とする自動給
電システム。1. A plurality of phase adjustments are performed for an input device that constantly inputs the state of a power system and a monitoring point where system information input from the input device deviates from a preset allowable deviation range. In an automatic power supply system that performs voltage / reactive power control processing by selectively controlling the equipment having the greatest effect from the power supply, the n-minute ahead total demand prediction processing means and the phase-adjusting equipment selectively controlled at the time of voltage / reactive power control A phase-modulation device operation frequency storage unit that stores the number of operations, an n-minute ahead total demand forecast value storage unit that stores a value predicted by the n-minute ahead total demand prediction process, and the stored phase-modulation device operation frequency and n An automatic power supply system comprising: a system characteristic coefficient correction processing means for inputting a fractional total demand forecast value and correcting a system characteristic coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03205518A JP3130581B2 (en) | 1991-07-22 | 1991-07-22 | Automatic power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03205518A JP3130581B2 (en) | 1991-07-22 | 1991-07-22 | Automatic power supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05130738A true JPH05130738A (en) | 1993-05-25 |
| JP3130581B2 JP3130581B2 (en) | 2001-01-31 |
Family
ID=16508206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03205518A Expired - Lifetime JP3130581B2 (en) | 1991-07-22 | 1991-07-22 | Automatic power supply system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3130581B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001054237A (en) * | 1999-08-05 | 2001-02-23 | Hitachi Ltd | System stabilizing control parameter determining device and method thereof |
| EP1324459A3 (en) * | 2001-12-28 | 2005-06-01 | Mitsubishi Denki Kabushiki Kaisha | Reactive power compensator |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606931B (en) * | 2013-12-10 | 2016-12-07 | 广州供电局有限公司 | A kind of AVC system definite value method of adjustment based on probability statistics feature |
-
1991
- 1991-07-22 JP JP03205518A patent/JP3130581B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001054237A (en) * | 1999-08-05 | 2001-02-23 | Hitachi Ltd | System stabilizing control parameter determining device and method thereof |
| EP1324459A3 (en) * | 2001-12-28 | 2005-06-01 | Mitsubishi Denki Kabushiki Kaisha | Reactive power compensator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3130581B2 (en) | 2001-01-31 |
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