JP3425221B2 - Power system stabilizer - Google Patents
Power system stabilizerInfo
- Publication number
- JP3425221B2 JP3425221B2 JP13932994A JP13932994A JP3425221B2 JP 3425221 B2 JP3425221 B2 JP 3425221B2 JP 13932994 A JP13932994 A JP 13932994A JP 13932994 A JP13932994 A JP 13932994A JP 3425221 B2 JP3425221 B2 JP 3425221B2
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- Prior art keywords
- phase difference
- control
- unit
- power system
- predicted
- Prior art date
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Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【産業上の利用分野】本発明は電力系統安定化装置に係
り、特に系統間振動脱調時の安定化制御直後の系統の安
定度向上のための電力系統安定化装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power system stabilizing device, and more particularly to a power system stabilizing device for improving the stability of a system immediately after stabilizing control at the time of system out-of-vibration.
【0002】[0002]
【従来の技術】図5に電力系統安定化装置が制御対象と
する電力系統モデルを示す。図5に示されるように、2
つの電力系統、即ち、系統1と系統2とが連系線により
接続され、各系統間で電力融通を行なって系統運用して
いる場合を考える。この場合、一方の系統内の事故によ
って系統間の電力融通が困難になり、系統間脱調に至る
ケースがある。2. Description of the Related Art FIG. 5 shows a power system model to be controlled by a power system stabilizer. As shown in FIG.
A case is considered in which two power systems, that is, the system 1 and the system 2 are connected by interconnection lines, and power is exchanged between the systems to operate the system. In this case, an accident in one system makes it difficult to exchange power between the systems, which may lead to step-out between the systems.
【0003】これを放置しておけば事故の影響が系統全
体に波及する。そこで、2系統間の位相差を計測,監視
することで系統間脱調を検出し、電源制限及び負荷制限
等の安定化制御を実施し、系統間の連系を保ったままで
系統間脱調を未然に防ぐ。If this is left unchecked, the effects of the accident will spread to the entire system. Therefore, by measuring and monitoring the phase difference between the two systems, the system out-of-step is detected, stabilization control such as power supply limitation and load limitation is performed, and the out-of-system out-of-system is maintained while the interconnection between the systems is maintained. To prevent from occurring.
【0004】図6に従来技術の構成を説明するための機
能ブロック図を示す。系統1及び系統2を代表する地点
の瞬時電圧を夫々計測し、これを電力系統安定化装置1
へ伝送し、系統間位相差算出部10へ入力する。系統間位
相差算出部10では、系統1及び系統2の瞬時電圧を用い
て2系統間の位相差δを算出する。FIG. 6 is a functional block diagram for explaining the configuration of the prior art. The instantaneous voltages at points representing the system 1 and the system 2 are respectively measured, and the measured values are used as the power system stabilizing device 1
And input to the inter-system phase difference calculation unit 10. The inter-system phase difference calculator 10 calculates the phase difference δ between the two systems using the instantaneous voltages of the systems 1 and 2.
【0005】脱調判定部11は位相差δの変化履歴から将
来のδを予測し、いち早く系統間脱調判定を行なうため
のものであり、δの変化の履歴から将来のδを予測する
δ予測部111 と、このδ予測部111 で求めたδ予測値と
しきい値δlimit とを比較する比較部112 から構成され
る。制御出力部12は脱調判定部11の判定結果を受けて制
御出力を出力する。The step-out determination unit 11 predicts the future δ from the change history of the phase difference δ, and performs the inter-system step-out determination promptly, and predicts the future δ from the history of the change of δ. It comprises a prediction section 111 and a comparison section 112 for comparing the δ prediction value obtained by the δ prediction section 111 with a threshold value δlimit. The control output unit 12 outputs a control output in response to the determination result of the step-out determination unit 11.
【0006】図7は系統間脱調に至るケースにおいて、
従来技術による安定化制御を実施した場合の系統間位相
差δの変化を示したものである。本図は振動脱調モード
における従来技術の安定化制御効果を示しており、系統
間脱調は解消され安定化がはかられる。FIG. 7 shows a case where a step-out occurs between systems.
FIG. 9 shows a change in inter-system phase difference δ when stabilization control according to a conventional technique is performed. This figure shows the stabilization control effect of the prior art in the vibration step-out mode, in which step-out between systems is eliminated and stabilization is achieved.
【0007】[0007]
【発明が解決しようとする課題】上記従来技術では、脱
調検出後(脱調予測検出後)、直ちに安定化制御を実施
するようにしていた。しかし系統間位相差δの変化の状
況によってはタイミングを見計らって安定化制御を実施
すれば安定化制御実施直後の系統動揺の低減をはかるこ
ともできる。したがって従来技術では系統間脱調の未然
防止は可能であるが、制御実施直後に、系統周波数変動
や発電機内部位相角の変動等、大きい系統動揺を引き起
こす虞れがある。本発明は上記事情に鑑みてなされたも
のであり、安定化制御直後の系統動揺を低減し、系統の
動態安定度の向上の可能な電力系統安定化装置を提供す
ることを目的としている。In the above prior art, the stabilization control is performed immediately after the step-out is detected (after the step-out prediction is detected). However, depending on the situation of the change of the phase difference δ between the systems, if the stabilization control is performed in consideration of the timing, the system fluctuation immediately after the execution of the stabilization control can be reduced. Therefore, in the related art, it is possible to prevent step-out between systems, but there is a possibility that a large system fluctuation such as a change in system frequency or a change in the phase angle inside the generator immediately after the control is performed. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power system stabilization device capable of reducing system fluctuation immediately after stabilization control and improving the dynamic stability of the system.
【0008】[0008]
【課題を解決するための手段】本発明の請求項1に係る
電力系統安定化装置は、複数の電力系統内の夫々の代表
地点の瞬時電圧を用いて系統間の電圧位相差を求める系
統間位相差算出部と、前記系統間位相差算出部で求めた
電圧位相差の変化履歴から所定の予測時間後の位相差の
予測値を求める位相差予測部と、前記系統間位相差算出
部で求めた電圧位相差あるいは前記位相差予測部で求め
た予測位相差を基に電力系統の脱調を検出する脱調検出
部と、前記脱調検出部が脱調を検出したとき前記予測位
相差の極小値を基準に前記予測時間及び安定化制御の仕
上がり時間に応じ制御出力タイミングを決定し制御実施
信号を出力する制御タイミング決定部と、前記制御タイ
ミング決定部からの制御実施信号により電力系統の脱調
を未然に防止するための安定化制御を実施する制御出力
部とを備えた。According to a first aspect of the present invention, there is provided an electric power system stabilizing apparatus which obtains a voltage phase difference between systems using instantaneous voltages at respective representative points in a plurality of electric power systems. A phase difference calculation unit, a phase difference prediction unit that calculates a predicted value of a phase difference after a predetermined prediction time from a change history of the voltage phase difference obtained by the inter-system phase difference calculation unit, and the inter-system phase difference calculation unit. A step-out detection unit that detects step-out of the power system based on the obtained voltage phase difference or the predicted phase difference obtained by the phase difference prediction unit, and the predicted phase difference when the step-out detection unit detects step-out. A control timing determining unit that determines a control output timing according to the predicted time and the finishing time of the stabilization control based on the minimum value of the control timing and outputs a control execution signal; and a power execution system based on a control execution signal from the control timing determination unit. Prevent loss of synchrony And a control output unit for carrying out the stabilization control of the fit.
【0009】本発明の請求項2に係る電力系統安定化装
置は、請求項1において、制御タイミング決定部は、前
記予測位相差の極小値を検出したとき、前記予測時間か
ら前記仕上がり時間を遡り前記制御実施信号の制御出力
タイミングを決定することを制御タイミング決定部は、
前記予測位相差の極小値を検出したとき、前記予測時間
から前記仕上がり時間を遡り前記制御実施信号の制御出
力タイミングを決定することを制御タイミング決定部
は、前記予測位相差の極小値を検出したとき、前記予測
時間から前記仕上がり時間を遡り前記制御実施信号の制
御出力タイミングを決定するよう構成した。According to a second aspect of the present invention, in the power system stabilizing apparatus according to the first aspect, when the control timing determining unit detects the minimum value of the predicted phase difference, the control time determining unit traces back the finishing time from the predicted time. The control timing determination unit determines the control output timing of the control execution signal,
When detecting the minimum value of the predicted phase difference, the control timing determining unit determines that the control output timing of the control execution signal is determined by going back to the finishing time from the predicted time, and detects the minimum value of the predicted phase difference. At this time, the control output timing of the control execution signal is determined by going back the finishing time from the predicted time.
【0010】[0010]
【0011】本発明の請求項3に係る電力系統安定化装
置は、複数の電力系統の夫々の代表地点の瞬時電圧を用
いて系統間の電圧位相差を求める系統間位相差算出部
と,電力系統の脱調を検出する脱調検出部と、前記脱調検
出部が脱調を検出したとき前記電圧位相差の極小値で制
御実施信号を出力する制御タイミング決定部と,前記制
御タイミング決定部からの制御実施信号により電力系統
の脱調を未然に防止するための安定化制御を実施する制
御出力部とを備えた。According to a third aspect of the present invention, there is provided an electric power system stabilizing apparatus, comprising: an inter-system phase difference calculating unit for obtaining a voltage phase difference between the systems using instantaneous voltages at respective representative points of a plurality of electric power systems; A step-out detecting unit that detects step-out of a system, a control timing determining unit that outputs a control execution signal at a minimum value of the voltage phase difference when the step-out detecting unit detects step-out, and the control timing determining unit. And a control output unit for performing stabilization control for preventing out-of-step of the power system in advance by a control execution signal from the control system.
【0012】[0012]
【作用】本発明の請求項1に係る電力系統安定化装置
は、脱調判定部にて系統間位相差δの変化履歴から将来
のδを予測する。この予測値の振幅の推移を監視し、振
幅が増加傾向にあり、かつ閾値を越えたことにより振動
脱調を検出する。ここで振動脱調検出があつたときに、
系統間位相差δ予測値の推移から安定化制御直後の系統
動揺が小さくなるように制御タイミングを決定する。こ
の制御タイミングは予測された系統間位相差の極小値と
する。The power system stabilizing device according to the first aspect of the present invention predicts a future δ from a change history of the phase difference δ between the systems in the step-out determination unit. The change of the amplitude of the predicted value is monitored, and the vibration step-out is detected when the amplitude is increasing and exceeds the threshold value. Here, when vibration out-of-step is detected,
The control timing is determined from the transition of the inter-system phase difference δ prediction value so that the system fluctuation immediately after the stabilization control is reduced. This control timing is a minimum value of the predicted inter-system phase difference.
【0013】又、請求項2に係る電力系統安定化装置
は、予め系統間位相差の極小値を求め、これから遡つて
決定するものである。Further, the power system stabilizing device according to claim 2 obtains the minimum value of the phase difference between the systems in advance, and determines the minimum value retroactively from this.
【0014】本発明の請求項3に係る電力系統安定化装
置は、脱調検出したとき、制御タイミング決定部では電
圧位相差の極小値にて制御実施信号が出力されるため、
脱調を未然に防止できる。In the power system stabilizing device according to the third aspect of the present invention, when step-out is detected, the control timing determination unit outputs the control execution signal at the minimum value of the voltage phase difference.
Step-out can be prevented beforehand.
【0015】[0015]
【実施例】図1は本発明の請求項1に係る電力系統安定
化装置の一実施例機能ブロック図であり、図1において
図6と同一対応部については同一符号を付して説明を省
略する。本実施例では脱調判定部11内に振動脱調検出部
113 と制御タイミング決定部114 とを付加した点に特徴
を有している。そして振動脱調検出部113 はδ予測部か
らの出力としきい値limit とから振動脱調を検出し、制
御タイミング決定部114 は振動脱調検出部113 からの出
力とδ予測部からの出力とを入力して制御タイミングが
最適となるように制御実施信号を出力する。ここで、δ
が極小値となる時点を制御タイミングとした場合に制御
実施直後の系統動揺を最小にできることに着眼し、本実
施例ではδ予測値が極小値となる時点を検出し、最適制
御タイミング出力の基としている。FIG. 1 is a functional block diagram of an embodiment of a power system stabilizing apparatus according to claim 1 of the present invention. In FIG. I do. In this embodiment, a vibration step-out detection unit is provided in the step-out determination unit 11.
It is characterized in that a control timing decision unit 114 and a control timing decision unit 114 are added. Then, the vibration out-of-step detection unit 113 detects vibration out-of-step from the output from the δ prediction unit and the threshold limit, and the control timing determination unit 114 outputs the output from the vibration out-of-step detection unit 113 and the output from the δ prediction unit. And outputs a control execution signal such that the control timing is optimized. Where δ
Focusing on minimizing system fluctuations immediately after the control is performed when the control timing is set to the time when the control value becomes a minimum value, the present embodiment detects the time point at which the predicted δ value becomes the minimum value, and based on the optimal control timing output base value. And
【0016】図2は系統間振動脱調時に本発明による安
定化制御を実施した場合の系統間位相差δと脱調検出,
制御出力,制御仕上りの時間的関係を示したものであ
る。図において、実際の系統間位相差δは実線で示し、
予測値は点線で示す。事故発生により周期4秒程度の電
圧振動が発生する。所定検出時間内において振幅増加、
かつ、その振幅がしきい値δlimit より大であると脱調
を検出する。FIG. 2 shows the phase difference δ between the systems and the detection of the step-out when the stabilization control according to the present invention is performed at the time of the system out-of-vibration synchronization.
It shows the temporal relationship between control output and control finish. In the figure, the actual system phase difference δ is indicated by a solid line,
The predicted value is indicated by a dotted line. A voltage oscillation having a period of about 4 seconds occurs due to the occurrence of the accident. Amplitude increase within a predetermined detection time,
If the amplitude is larger than the threshold value δlimit, a step-out is detected.
【0017】しかし安定化制御をせずにそのままとして
おくと、位相差δは一点鎖線のように益々増加して脱調
状態になるが、本発明のように所定制御タイミングにて
δの極小値となる時点を予測して制御することにより、
実線のように安定化制御実施後の系統動揺を低減でき
る。この場合の制御タイミングは位相差δが極小値(極
小値近傍)となる時点で制御仕上がりさせるため、制御
タイミングは(予測時間)−(所定作動時間)を考慮し
て決定する。なお、制御仕上り時間(所定作動時間)は
一般に200〜250msec程度であり、制御の指令
出力(制御実施信号)のタイミングとしてはδ予測値の
極小値の検出を起点として所定時間(例えば20mse
c程度)引きのばし出力すればよい。However, if the stabilization control is left as it is, the phase difference δ increases more and more as shown by a dashed line and goes out of step. However, as in the present invention, the minimum value of δ is determined at a predetermined control timing. By predicting and controlling when
As shown by the solid line, the system fluctuation after the stabilization control is performed can be reduced. In this case, the control timing is determined in consideration of (predicted time)-(predetermined operation time) in order to finish the control when the phase difference δ becomes a minimum value (near the minimum value). The control finishing time (predetermined operation time) is generally about 200 to 250 msec, and the timing of the control command output (control execution signal) is a predetermined time (for example, 20 msec) starting from the detection of the minimum value of the predicted δ value.
c) The output may be extended.
【0018】そこで、図1によって作用を説明すると、
代表地点の瞬時電圧が系統間位相差算出部10に入力され
る。系統間位相差算出部10では系統間の位相差δを算出
し、これをδ予測部111 に渡す。δ予測部111 はδの変
化履歴から将来(例えば220〜270msec先)の
δを予測して、振動脱調検出部113 へ渡す。The operation will be described with reference to FIG.
The instantaneous voltage at the representative point is input to the inter-system phase difference calculation unit 10. The inter-system phase difference calculation unit 10 calculates the inter-system phase difference δ and passes it to the δ prediction unit 111. The δ prediction section 111 predicts δ in the future (for example, 220 to 270 msec) from the change history of δ and passes it to the vibration out-of-step detection section 113.
【0019】振動脱調検出部の処理を図3のフローチャ
ートにて説明する。先ず、δ予測部111 で求めたδ予測
値を読み込む(ステップS31)。読み込んだδ予測値の
変化を見ながら極大値,極小値を検出し(ステップS3
2)、検出したδ予測値の極値を保存する(ステップS3
3)。保存した極値から振動の振幅値を求める(ステッ
プS34)。求めた振幅値が増加傾向にあり、かつ予め設
定しておいたしきい値δlimit を越えたことにより振動
脱調に至るか否かを判定する(ステップS35)。ステッ
プS35の結果、脱調判定が成立した場合、制御タイミン
グ決定部114 に対して、振動脱調判定有り出力を出力す
る(ステップS36)。The process of the vibration step-out detecting unit will be described with reference to the flowchart of FIG. First, the δ prediction value obtained by the δ prediction unit 111 is read (step S31). The maximum value and the minimum value are detected while observing the change in the read δ prediction value (step S3).
2) Save the detected extreme value of the predicted δ value (step S3)
3). The amplitude value of the vibration is obtained from the stored extreme value (step S34). It is determined whether or not the amplitude value thus obtained tends to increase and exceeds the threshold value δlimit set in advance, leading to vibration step-out (step S35). As a result of step S35, if the out-of-step determination is established, an output with vibration out-of-step determination is output to the control timing determination unit 114 (step S36).
【0020】図4は制御タイミング決定部の処理を示す
フローチャートである。制御タイミング決定部114 は振
動脱調検出部113 からの振動脱調判定有り出力を受けて
(ステップS41)、δ予測値が極小値であるかどうか判
定する(ステップS42)。δ予測値が極小値となった
時、制御実施信号を出力してから制御仕上りまでに要す
る遅れ時間(所定作動時間:伝送遅延時間,端末装置で
の処理時間,CB開極時間の和)を予め考慮しておき
(仕上り時間(所定作動時間)は一般に200〜250
msec程度)、最適制御タイミングで制御が仕上るよ
うに制御実施信号を制御出力部12へ出力する(ステップ
S43)。例えば、δの予測時間が250msec前で、
制御仕上がり時間が200msecとすると、δ予測値
が極小値となった時点から50msec(250−20
0)後に制御実施信号を出力する。FIG. 4 is a flowchart showing the processing of the control timing determining section. The control timing determination unit 114 receives the output with vibration out-of-step determination from the vibration step-out detection unit 113 (step S41), and determines whether the predicted δ value is a minimum value (step S42). When the δ predicted value becomes the minimum value, the delay time required from the output of the control execution signal to the completion of the control (predetermined operation time: transmission delay time, processing time at the terminal device, CB opening time) is calculated. Considering in advance (finish time (predetermined operation time) is generally 200 to 250
msec), and outputs a control execution signal to the control output unit 12 so that the control is completed at the optimal control timing (step S43). For example, if the predicted time of δ is 250 msec before,
Assuming that the control finish time is 200 msec, 50 msec (250−20) from the time when the predicted δ value becomes the minimum value.
0) Later, a control execution signal is output.
【0021】制御出力部12は制御タイミング決定部114
からの制御実施信号を受けて制御出力を出力する。これ
により実際の系統間位相差δが極小となるタイミングで
安定化制御が実施できる。The control output unit 12 includes a control timing determination unit 114
And outputs a control output in response to the control execution signal from. Thereby, the stabilization control can be performed at the timing when the actual phase difference δ between the systems is minimized.
【0022】以上説明したように、本実施例によれば系
統間の代表地点の瞬時電圧を用いて電圧位相差を検出す
ると共に位相差δを予測し、振幅が増加傾向でかつ所定
値より大であるとき脱調判定し、δ予測値が極小値にな
った時点近傍で制御が仕上るよう制御出力を導出するよ
うにしたので、系統間振動脱調時の安定化制御直後の系
統動揺を低減し、系統の動態安定度の向上をはかること
が可能となる。As described above, according to this embodiment, the voltage phase difference is detected and the phase difference δ is predicted using the instantaneous voltage at the representative point between the systems, and the amplitude tends to increase and is larger than the predetermined value. Is determined, the control output is derived so that the control is completed near the time when the predicted value of the δ has reached a minimum value, so that the system fluctuation immediately after the stabilization control during inter-system vibration step-out is reduced. However, it is possible to improve the dynamic stability of the system.
【0023】上記実施例では安定化制御実施後の系統動
揺も最小にすることを目指し、δの極小値に制御仕上り
するよう制御実施信号の出力タイミングを制御している
が、δの極小値近傍であっても従来に比べ充分系統動揺
を低減できる効果を有する。又、このことからも脱調判
定部がδ予測値を用いない方式であっても本発明を実施
し、効果を奏することができる。つまり、制御タイミン
グ決定部にδ算出部10の出力と別方式の脱調判定部の出
力とを入力しておき、別方式脱調判定部が脱調判定した
ときδの極小値(あるいは近傍)で制御実施信号を出力
するようにすれば良い。In the above embodiment, the output timing of the control execution signal is controlled so that the control is finished to the minimum value of δ with the aim of minimizing the system fluctuation after the execution of the stabilization control. Even in this case, there is an effect that the system oscillation can be sufficiently reduced as compared with the related art. Also from this, the present invention can be implemented and effects can be obtained even if the step-out determination unit does not use the predicted δ value. That is, the output of the δ calculation unit 10 and the output of the out-of-step determination unit of another method are input to the control timing determination unit, and when the out-of-step determination unit of another method determines out-of-step, the minimum value of δ (or near) Then, the control execution signal may be output.
【0024】[0024]
【発明の効果】以上説明したように、本発明によれば脱
調判定時に系統間の位相差の極小値あるいは極小値近傍
で制御仕上りできるように制御指令出力(制御実施信
号)のタイミングを制御するので、安定化制御後の系統
動揺を低減し、系統の動態安定度の向上を図ることが可
能となる。As described above, according to the present invention, the timing of the control command output (control execution signal) is controlled so that the control can be finished at or near the minimum value of the phase difference between the systems at the time of step-out determination. Therefore, it is possible to reduce the system fluctuation after the stabilization control and improve the dynamic stability of the system.
【図1】本発明の請求項1に係る電力系統安定化装置の
一実施例の機能ブロック図。FIG. 1 is a functional block diagram of one embodiment of a power system stabilizing device according to claim 1 of the present invention.
【図2】本発明による安定化制御を説明する図。FIG. 2 is a diagram illustrating stabilization control according to the present invention.
【図3】本発明の実施例における振動脱調検出部の処理
内容を示すフローチャート。FIG. 3 is a flowchart showing processing contents of a vibration step-out detecting unit in the embodiment of the present invention.
【図4】本発明の実施例における制御タイミング決定部
の処理内容を示すフローチャート。FIG. 4 is a flowchart showing processing contents of a control timing determination unit in the embodiment of the present invention.
【図5】電力系統安定化装置が制御対象とする電力系統
モデル。FIG. 5 is a power system model to be controlled by the power system stabilization device.
【図6】従来技術の構成を説明するための機能ブロック
図。FIG. 6 is a functional block diagram for explaining the configuration of the related art.
【図7】従来技術による安定化制御の効果を示す図。FIG. 7 is a diagram showing the effect of the stabilization control according to the related art.
1 電力系統安定化装置 10 系統間位相差算出部 11 脱調判定部 111 δ予測部 113 振動脱調検出部 114 制御タイミング決定部 12 制御出力部 112 比較部 1 Power system stabilizer 10 Inter-system phase difference calculator 11 Step-out judgment unit 111 δ prediction unit 113 Vibration step-out detector 114 Control timing decision unit 12 Control output section 112 Comparison section
Claims (3)
時電圧を用いて系統間の電圧位相差を求める系統間位相
差算出部と、前記系統間位相差算出部で求めた電圧位相
差の変化履歴から所定の予測時間後の位相差の予測値を
求める位相差予測部と、前記系統間位相差算出部で求め
た電圧位相差あるいは前記位相差予測部で求めた予測位
相差を基に電力系統の脱調を検出する脱調検出部と、前
記脱調検出部が脱調を検出したとき前記予測位相差の極
小値を基準に前記予測時間及び安定化制御の仕上がり時
間に応じ制御出力タイミングを決定し制御実施信号を出
力する制御タイミング決定部と、前記制御タイミング決
定部からの制御実施信号により電力系統の脱調を未然に
防止するための安定化制御を実施する制御出力部とを備
えたたことを特徴とする電力系統安定化装置。An inter-system phase difference calculating unit for obtaining a voltage phase difference between systems using instantaneous voltages at respective representative points in a plurality of power systems, and a voltage phase difference obtained by the inter-system phase difference calculating unit. A phase difference prediction unit for obtaining a predicted value of a phase difference after a predetermined prediction time from a change history of the system, and a voltage phase difference obtained by the inter-system phase difference calculation unit or a prediction phase difference obtained by the phase difference prediction unit. A step-out detection unit that detects step-out of the power system; and a pole of the predicted phase difference when the step-out detection unit detects step-out.
A control timing determining unit that determines a control output timing according to the predicted time and the finishing time of the stabilization control based on the small value and outputs a control execution signal; and disconnection of the power system by the control execution signal from the control timing determining unit. A power system stabilizing device, comprising: a control output unit for performing stabilization control for preventing keying.
差の極小値を検出したとき、前記予測時間から前記仕上
がり時間を遡り前記制御実施信号の制御出力タイミング
を決定することを特徴とする請求項1記載の電力系統安
定化装置。2. The control timing determining section, when detecting a minimum value of the predicted phase difference, determines a control output timing of the control execution signal by going back the finishing time from the predicted time. 2. The electric power system stabilizing device according to 1.
電圧を用いて系統間の電圧位相差を求める系統間位相差
算出部と,電力系統の脱調を検出する脱調検出部と 、 前記
脱調検出部が脱調を検出したとき前記電圧位相差の極小
値で制御実施信号を出力する制御タイミング決定部と,
前記制御タイミング決定部からの制御実施信号により電
力系統の脱調を未然に防止するための安定化制御を実施
する制御出力部とを備えたことを特徴とする電力系統安
定化装置。3. An instant of each representative point of a plurality of power systems.
Finding the phase difference between systems using voltage
A calculation unit, and the step-out detection unit for detecting a step-out of the power system, the
When the step-out detection unit detects step-out, the voltage phase difference is minimized.
A control timing determining unit that outputs a control execution signal with a value,
In response to a control execution signal from the control timing determination unit,
Implement stabilization control to prevent power system step-out
A power system stabilizing device, comprising:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13932994A JP3425221B2 (en) | 1994-05-30 | 1994-05-30 | Power system stabilizer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13932994A JP3425221B2 (en) | 1994-05-30 | 1994-05-30 | Power system stabilizer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07327318A JPH07327318A (en) | 1995-12-12 |
JP3425221B2 true JP3425221B2 (en) | 2003-07-14 |
Family
ID=15242786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13932994A Expired - Fee Related JP3425221B2 (en) | 1994-05-30 | 1994-05-30 | Power system stabilizer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3425221B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4279763B2 (en) * | 2004-09-29 | 2009-06-17 | 株式会社日立製作所 | Power system stability diagnosis device, power system stabilization device, and power system contraction support device |
JP4906634B2 (en) * | 2007-08-08 | 2012-03-28 | 株式会社日立製作所 | Power system stability diagnostic apparatus and method |
JP5424774B2 (en) * | 2009-08-07 | 2014-02-26 | 株式会社日立製作所 | System stabilization apparatus and method |
CN111198570B (en) * | 2020-02-05 | 2021-06-01 | 哈尔滨工业大学 | Anti-delay high-precision active disturbance rejection attitude control method based on fixed time differentiator prediction |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57183218A (en) * | 1981-05-06 | 1982-11-11 | Tokyo Shibaura Electric Co | Method of predicting stepout of power system |
JPH0714258B2 (en) * | 1985-10-14 | 1995-02-15 | 東京電力株式会社 | Step-out detection device |
JP2825238B2 (en) * | 1988-08-23 | 1998-11-18 | 東京電力株式会社 | Power system stabilizer |
-
1994
- 1994-05-30 JP JP13932994A patent/JP3425221B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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JPH07327318A (en) | 1995-12-12 |
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