JPH0515064A - Load-limiting device of power system - Google Patents
Load-limiting device of power systemInfo
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- JPH0515064A JPH0515064A JP3188355A JP18835591A JPH0515064A JP H0515064 A JPH0515064 A JP H0515064A JP 3188355 A JP3188355 A JP 3188355A JP 18835591 A JP18835591 A JP 18835591A JP H0515064 A JPH0515064 A JP H0515064A
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- power
- load
- amount
- power system
- information
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、電力系統において、
原子力発電機の緊急停止等の電源脱落発生による周波数
の低下を防止する場合などに利用する電力系統の負荷制
限装置に関するものである。BACKGROUND OF THE INVENTION The present invention relates to a power system,
The present invention relates to a load limiting device for a power system used when preventing a frequency drop due to power failure such as an emergency stop of a nuclear power generator.
【０００２】[0002]
【従来の技術】図３は従来の電力系統の負荷制限装置を
示すブロック図であり、図において、Ａ，Ｂは電力系
統、Ｃは電力系統Ａ，Ｂを結ぶ幹線、１ａ，２ａは電力
系統Ａに電力を供給する発電機、１ｂ，２ｂは電力系統
Ｂに電力を供給する発電機、３ａ，３ｂはそれぞれ電力
系統Ａ，Ｂを結ぶ送電線の系統事故（ルート断）を検出
し、系統安定化装置４ａ，４ｂに事故検出信号を送出す
る端末装置、５ａ，５ｂは各送電線の潮流情報を送信す
る第１の情報伝送装置である。なお、各系統安定化装置
４ａ，４ｂは発電機１ａ，２ａ，１ｂ，２ｂより必要負
荷制限量を演算し、その量に応じて負荷制限指令を出力
する。2. Description of the Related Art FIG. 3 is a block diagram showing a conventional load limiting device for a power system. In the figure, A and B are power systems, C is a main line connecting power systems A and B, and 1a and 2a are power systems. A generator supplying electric power to A, 1b and 2b generators supplying electric power to the electric power system B, and 3a and 3b detect a system fault (route disconnection) of a transmission line connecting the electric power systems A and B, respectively, and The terminal devices 5a and 5b that send an accident detection signal to the stabilization devices 4a and 4b are first information transmission devices that transmit the power flow information of each power transmission line. Each system stabilizing device 4a, 4b calculates a required load limiting amount from the generators 1a, 2a, 1b, 2b, and outputs a load limiting command according to the amount.
【０００３】また、６ａ，６ｂは必要負荷制限量に応じ
た負荷量を選択するために必要な負荷線潮流情報を送信
する第２の情報伝送装置、７ａ，７ｂは系統安定化装置
４ａ，４ｂより電力系統Ａ，Ｂへ負荷制限指令を送出す
るための転送遮断装置である。また、図４は例えば系統
安定化装置４ａによる負荷制御の手順を示すフローチャ
ートである。Further, 6a and 6b are second information transmission devices for transmitting load line power flow information necessary for selecting a load amount according to a required load limit amount, and 7a and 7b are system stabilizing devices 4a and 4b. This is a transfer cutoff device for sending a load limiting command to the electric power systems A and B. Further, FIG. 4 is a flowchart showing a procedure of load control by the system stabilizing device 4a, for example.
【０００４】次に、図４のフローチャートを参照しなが
ら、動作について説明する。一般に、電力系統におい
て、電源が脱落したことによる周波数の低下がある値以
下になると、需要家への電気機器等の故障を招き、電力
需要と供給のバランス（以下、需給バランスという）が
保てなくなる。このため、保護装置を作動して大停電に
至らしめることになる。そこで、系統における一部の負
荷（需要家）を高速に遮断する（これを負荷制限とい
う）ことによって、周波数の低下を防止することにな
る。このとき、最適となる必要負荷制限量は、Ｐａを電
源脱落量［ＭＷ］、Ｐａを許容電源脱落量［ＭＷ］、Ｋ
Δｆを系統特性定数とすると、数１のようになる。Next, the operation will be described with reference to the flowchart of FIG. In general, in a power system, if the frequency drops due to the power supply being dropped to a value below a certain level, it will lead to the breakdown of electric equipment to customers, and the balance between power demand and supply (hereinafter referred to as the supply and demand balance) can be maintained. Disappear. Therefore, the protection device is activated to cause a large power failure. Therefore, a part of the load (consumer) in the system is cut off at high speed (this is called load limitation) to prevent the frequency from decreasing. At this time, the optimum required load limiting amount is Pa for the power loss amount [MW], Pa for the allowable power loss amount [MW], K
When Δf is a system characteristic constant, it becomes as shown in Equation 1.
【０００５】[0005]
【数１】 [Equation 1]
【０００６】この数１では、許容電源脱落量Ｐａは、負
荷制限を実施しなくても、系統の予備力で維持しうる電
源脱落量を示す。従って、Ｐｇ〈Ｐａのとき、必要負荷
制御量Ｐｌｆはマイナスとなり、負荷制限は不要となる
ことがわかる。また、系統特性定数ＫΔｆは系統固有の
値で、許容電源脱落量Ｐａは系統容量等のオンライン情
報，系統特性数から算出し、系統特性定数ＫΔｆは計算
機を用いて、系統のシミュレーションを行うことで求め
られる。In this equation 1, the allowable power drop amount Pa indicates the power drop amount that can be maintained by the reserve power of the system without performing load limitation. Therefore, when Pg <Pa, the required load control amount Plf becomes negative, and it is understood that the load limitation is unnecessary. Further, the system characteristic constant KΔf is a value peculiar to the system, the allowable power loss amount Pa is calculated from online information such as the system capacity and the number of system characteristics, and the system characteristic constant KΔf is obtained by performing a system simulation using a computer. Desired.
【０００７】次に、系統安定化装置４ａによる負荷制限
の動作を図４のフローチャートに従って説明する。ま
ず、第１の情報伝送装置５ａより一定周期毎に送られて
くる潮流情報を取込み（ステップＳＴ１）、この潮流値
をもとに、現在、この電源が脱落した場合、どれだけの
負荷制限を行えば良いかを、数１に基づき、必要負荷制
限量Ｐｌｆａの算出により決定し（ステップＳＴ２）、
こうして算出した必要負荷制限量Ｐｌｆａに対し、これ
を上まわる最小の組合せとなる負荷を選択する（ステッ
プＳＴ３）。ここで、負荷（需要家）は、系統安定化装
置４ａが対象とする電源脱落ケース（以下、事故ケース
という）に対し安定化しうる十分な負荷を複数備えてい
る。そして、これらの負荷に設置された第２の情報伝送
装置６ａより送られる負荷線潮流情報に基づき、遮断パ
ターンを選択する。Next, the load limiting operation by the system stabilizing device 4a will be described with reference to the flowchart of FIG. First, the power flow information sent from the first information transmission device 5a at regular intervals is fetched (step ST1), and based on this power flow value, if the power supply is currently dropped, how much load is limited? Whether or not to carry out is determined by calculating the required load limit amount Plfa based on the equation 1 (step ST2),
With respect to the required load limit amount Plfa calculated in this manner, the minimum combination of loads that exceeds it is selected (step ST3). Here, the load (consumer) is provided with a plurality of sufficient loads that can be stabilized with respect to the power loss case (hereinafter referred to as an accident case) targeted by the system stabilizing device 4a. Then, the cutoff pattern is selected based on the load line power flow information sent from the second information transmission device 6a installed in these loads.
【０００８】この遮断パターンの選択例は、次の通りで
ある。いま、必要負荷制限量Ｐｌｆａを３００ＭＷ、負
荷Ｐ，Ｑ，Ｒの大きさをそれぞれ１００ＭＷ，１５０Ｍ
Ｗ，２００ＭＷとすると、（イ）Ｐ＋Ｑ＝２５０ＭＷ
〈Ｐｌｆａ、（ロ）Ｑ＋Ｒ＝３５０ＭＷ〉Ｐｌｆａ、
（ハ）Ｐ＋Ｒ＝３００ＭＷ〈Ｐｌｆａ、（ニ）Ｐ＋Ｑ＋
Ｒ＝４５０ＭＷ〉Ｐｌｆａとなるので、選択される遮断
パターンは（ロ）の負荷Ｑと負荷Ｒとなる。An example of selecting this blocking pattern is as follows. Now, the required load limit amount Plfa is 300 MW, and the loads P, Q, and R are 100 MW and 150 M, respectively.
Assuming W and 200 MW, (a) P + Q = 250 MW
<Plfa, (b) Q + R = 350 MW> Plfa,
(C) P + R = 300 MW <Plfa, (D) P + Q +
Since R = 450 MW> Plfa, the cutoff patterns to be selected are the load Q and the load R of (b).
【０００９】次に、実際に事故が発生したかどうかを判
定する（ステップＳＴ４）。すなわち、端末装置３ａよ
り送られる事故検出信号を入力し、もし事故が発生すれ
ば、ステップＳＴ３で選択した上記遮断パターンに基づ
き、負荷遮断信号を転送遮断装置７ａに出力する（ステ
ップＳＴ５）。Next, it is determined whether or not an accident has actually occurred (step ST4). That is, the accident detection signal sent from the terminal device 3a is input, and if an accident occurs, a load cutoff signal is output to the transfer cutoff device 7a based on the cutoff pattern selected in step ST3 (step ST5).
【００１０】なお、系統安定化装置４ｂについても、系
統安定化装置４ａについて説明した処理と同様で、系統
安定化装置４ａとは異なる事故ケースおよび負荷を対象
とする。また、両系統安定化装置４ａ，４ｂは全く独立
に動作する。さらに、系統安定化装置４ｂでの必要負荷
制限量は、Ｐｇｂ1 を発電機１ｂの出力値［ＭＷ］、Ｐ
ｇｂ2 を発電機２ｂの出力値［ＭＷ］とすると、数２の
通りとなる。The system stabilizing device 4b is also similar to the process described for the system stabilizing device 4a, and is intended for accident cases and loads different from those of the system stabilizing device 4a. Further, both system stabilizing devices 4a and 4b operate completely independently. Further, the required load limiting amount in the system stabilizing device 4b is determined by setting Pgb 1 to the output value [MW] of the generator 1b, P
When gb 2 is the output value [MW] of the generator 2b, the following equation 2 is obtained.
【００１１】[0011]
【数２】 [Equation 2]
【００１２】[0012]
【発明が解決しようとする課題】従来の電力系統の負荷
制限装置は以上のように構成されているので、電力系統
Ａ，Ｂにおいて同時に電源が脱落（多重事故）した場合
や、短期間に連続して脱落（続発事故）した場合、数１
における許容電源脱落量Ｐａ，および系統特性定数ＫΔ
ｆは、電力系統Ａ，Ｂとも同一の値であり、一例として
Ｐｇａ1 ＋Ｐｇａ2 〈Ｐａ，Ｐｇｂ1 ＋Ｐｇｂ2 〈Ｐ
ａ，Ｐｇａ1 ＋Ｐｇａ2 ＋Ｐｇｂ1 ＋Ｐｇｂ2 〉Ｐａと
なる条件を考えた場合、系統全体では、Ｐｌｆ〉０で負
荷制限を行う必要があるにも拘らず、系統安定化装置４
ａ，４ｂがＰｌｆａ〈０，Ｐｌｆｂ〈０で負荷制限は必
要ないと判定するため不足制御となり、系統の安定化を
図ることができないなどの課題があった。Since the conventional load limiting device for the electric power system is constructed as described above, it is possible that the electric power sources of the electric power systems A and B are simultaneously disconnected (multiple accidents) or in a short period of time. And then dropped out (secondary accident), the number 1
Permissible power loss amount Pa and system characteristic constant KΔ
f is the same value in the power systems A and B, and as an example, Pga 1 + Pga 2 <Pa, Pgb 1 + Pgb 2 <P
Considering the condition that a, Pga 1 + Pga 2 + Pgb 1 + Pgb 2 > Pa, in the entire system, the system stabilization device 4 is required despite the fact that the load is limited by Plf> 0.
Since a and 4b determine Plfa <0 and Plfb <0 and load limitation is not necessary, insufficient control is performed, and there is a problem that the system cannot be stabilized.
【００１３】この発明は上記のような課題を解消するた
めになされたもので、不足制御となることなく、高精度
に負荷制限を実施できると共に、ソフトウェアにて、簡
単かつ安価に実現できる電力系統の負荷制限装置を得る
ことを目的とする。The present invention has been made in order to solve the above-mentioned problems, and it is possible to perform load limitation with high accuracy without insufficient control, and a power system that can be easily and inexpensively realized by software. The purpose is to obtain a load limiting device.
【００１４】[0014]
【課題を解決するための手段】この発明に係る電力系統
の負荷制限装置は、系統安定化装置に、電力系統全体の
電源脱落量に対する各電力系統の電源脱落量の比率を求
めさせ、上記電力系統全体としての必要負荷制限量を各
電力系統ごとの上記比率で配分し、該配分量に基づき非
同期で負荷制限を実施させるようにしたものである。A load limiting device for a power system according to the present invention causes a system stabilizing device to obtain a ratio of a power loss amount of each power system to a power loss amount of the entire power system, and The required load limitation amount for the entire system is distributed at the above ratio for each power system, and the load limitation is performed asynchronously based on the distribution amount.
【００１５】[0015]
【作用】この発明における系統安定化装置は、系統全体
の電源脱落量を検出することにより、系統全体で必要と
する負荷制限量を求めるため、各電力系統にまたがる電
源脱落が同時に、あるいは短期間に連続して発生した場
合でも不足制御とならず、精度良く負荷制限を実施す
る。また、系統全体の電源脱落量に対し、各電力系統の
電源脱落量の比率で系統全体として必要とされる負荷制
限量を分配することにより、電力系統ごとに電力需給バ
ランスを保つことができ、各電力系統間を結ぶ幹線の潮
流変動を小さくする。The system stabilizing device according to the present invention detects the amount of power loss of the entire system to obtain the load limiting amount required for the entire system. Therefore, the power loss across each power system can occur simultaneously or for a short period of time. Even if it occurs continuously, the load control is performed accurately without causing insufficient control. In addition, by distributing the load limitation amount required for the entire system at the ratio of the power loss amount of each power system to the power loss amount of the entire system, it is possible to maintain the power supply and demand balance for each power system, Minimize tidal current fluctuations on the main line connecting each power system.
【００１６】[0016]
【実施例】実施例１．以下、この発明の一実施例を図に
ついて説明する。図１において、Ａ，Ｂは電力系統、Ｃ
は電力系統Ａ，Ｂを結ぶ幹線、１ａ，２ａは電力系統Ａ
に電力を供給する発電機、１ｂ，２ｂは電力系統Ｂに電
力を供給する発電機、３ａ，３ｂはそれぞれ電力系統
Ａ，Ｂを結ぶ送電線の系統事故（ルート断）を検出し、
系統安定化装置４ａ，４ｂに事故検出信号を送出する端
末装置、５ａ，５ｂは各送電線の潮流情報を送信する第
１の情報伝送装置である。なお、各系統安定化装置４
ａ，４ｂは発電機１ａ，２ａ，１ｂ，２ｂより必要負荷
制限量を演算し、その量に応じて負荷制限指令を出力す
る。EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, A and B are electric power systems and C
Is a main line connecting power systems A and B, 1a and 2a are power systems A
Generators for supplying electric power to the power generators 1b, 2b for supplying electric power to the electric power system B, and 3a, 3b for detecting a system fault (disconnection of the route) of the transmission line connecting the electric power systems A, B, respectively.
The terminal devices 5a and 5b for transmitting the accident detection signal to the system stabilizing devices 4a and 4b are the first information transmission devices for transmitting the power flow information of each power transmission line. In addition, each system stabilizing device 4
a and 4b calculate required load limiting amounts from the generators 1a, 2a, 1b and 2b, and output load limiting commands according to the calculated amounts.
【００１７】また、６ａ，６ｂは必要負荷制限量に応じ
た負荷量を選択するために必要な負荷線潮流情報を送信
する第２の情報伝送装置、７ａ，７ｂは系統安定化装置
４ａ，４ｂより電力系統Ａ，Ｂへ負荷制限指令を送出す
るための転送遮断装置である。また、この発明では、特
に、事故検出信号を送出する端末装置３ａ，３ｂおよび
送電線の潮流情報を送信する第１の情報伝送装置５ａ，
５ｂの各信号および情報を、情報伝達手段Ｙ１〜Ｙ４を
介して他系統の系統安定化装置４ａ，４ｂへも伝送して
いる。また、図２は電力系統Ａ側における負荷制御の手
順を示すフローチャートである。Further, 6a and 6b are second information transmission devices for transmitting load line power flow information necessary for selecting a load amount according to the required load limit amount, and 7a and 7b are system stabilizing devices 4a and 4b. This is a transfer cutoff device for sending a load limiting command to the electric power systems A and B. Further, in the present invention, in particular, the terminal devices 3a and 3b for transmitting the accident detection signal and the first information transmission device 5a for transmitting the power flow information of the power transmission line,
The signals and information of 5b are also transmitted to the system stabilizing devices 4a and 4b of other systems via the information transmitting means Y1 to Y4. Further, FIG. 2 is a flowchart showing a procedure of load control on the side of the power system A.
【００１８】次に、図２に示すフローチャートを用いて
動作を説明する。なお、説明をわかり易くするために、
発電機１ａ，２ａが電源脱落してｔ秒後（ｔ＝Ｔ：演算
同期）、発電機１ｂ，２ｂが電源脱落した場合の系統安
定化装置４ａの動作について説明する。まず、系統安定
化装置４ａは第１の情報伝送装置５ａ，５ｂより一定周
期毎に送られてくる送電線の潮流情報を取込み（ステッ
プＳＴ１１）、続いて、事故が発生したかどうかを検出
する信号としての端末装置３ａ，３ｂより送られる事故
検出信号を取込む（ステップＳＴ１２）。ここで、系統
安定化装置４ａ，４ｂが対象とする事故ケースは、発電
機１ａ，２ａの電源脱落、発電機１ｂ，２ｂの電源脱落
および発電機１ａ，２ａ，１ｂ，２ｂの電源脱落の３ケ
ースとなるが、ここでは、系統安定化装置４ａは上記各
信号を取込んで、発電機１ａ，２ａが電源脱落したと認
識する。Next, the operation will be described with reference to the flow chart shown in FIG. In order to make the explanation easier to understand,
The operation of the system stabilizing device 4a in the case where the generators 1a and 2a are powered off t seconds later (t = T: operation synchronization) and the generators 1b and 2b are powered off will be described. First, the system stabilizing device 4a takes in power flow information of the power transmission line sent from the first information transmitting devices 5a and 5b at regular intervals (step ST11), and subsequently detects whether or not an accident has occurred. The accident detection signal sent from the terminal devices 3a and 3b is taken in as a signal (step ST12). Here, the accident cases targeted by the power system stabilizers 4a and 4b are the power loss of the generators 1a and 2a, the power loss of the generators 1b and 2b, and the power loss of the generators 1a, 2a, 1b and 2b. In this case, the system stabilizing device 4a takes in the above signals and recognizes that the generators 1a and 2a have lost power.
【００１９】次に、検出した事故ケース並びに送電線の
潮流情報に基づき、数３および数４に従って必要負荷制
限量を算出する（ステップＳＴ１３）。ここで、ΣＰｇ
は系統全体での電源脱落量トータル［ＭＷ］、ΣＰｇａ
は電力系統ａにおける電源脱落量トータル［ＭＷ］、Σ
Ｐｇｂは電力系統ｂにおける電源脱落量トータル［Ｍ
Ｗ］、ｎ＝１，２，３・・・（整数）、Ｓは今までに遮
断した負荷制限量トータルとする。Next, based on the detected accident case and the power flow information of the transmission line, the required load limiting amount is calculated according to the equations 3 and 4 (step ST13). Where ΣPg
Is the total amount of power loss in the entire system [MW], ΣPga
Is the total amount of power loss in the power system a [MW], Σ
Pgb is the total amount of power loss in the power system b [M
W], n = 1, 2, 3 ... (integer), S is the total load limit amount interrupted so far.
【００２０】[0020]
【数３】 [Equation 3]
【００２１】[0021]
【数４】 [Equation 4]
【００２２】また、数３，数４において、Ｐｌｆａは、
系統安定化装置４ａの、Ｐｌｆｂは系統安定化装置４ｂ
の各必要負荷制限量を示し、ΣＰｇ＝Ｐｇａ（＝Ｐｇａ
1 ＋Ｐｇａ2 ），ΣＰｇａ＝Ｐｇａ，ΣＰｇ＝Ｐｇａ，
ΣＰｇｂ＝０，今まで両装置の遮断したトータルの必要
負荷制限量Ｓ＝０を代入すると、数５，数６のようにな
る。In equations 3 and 4, Plfa is
Plfb of the system stabilizing device 4a is a system stabilizing device 4b
Of each required load limit of ΣPg = Pga (= Pga
1 + Pga 2 ), ΣPga = Pga, ΣPg = Pga,
Substituting ΣPgb = 0 and the total required load limit amount S = 0 interrupted by both devices up to now, the following equations 5 and 6 are obtained.
【００２３】[0023]
【数５】 [Equation 5]
【００２４】[0024]
【数６】 [Equation 6]
【００２５】ここで、Ｐｇａ≦Ｐａの場合には、必要負
荷制限量Ｐｌｆａはマイナス値となり、負荷制限は実施
しない（ステップＳＴ１４）。一方、Ｐｇａ＞Ｐａの場
合には、必要負荷制限量Ｐｌｆａに基づき、これを上ま
わる最小の組合せとなる負荷を遮断選択し、選択した負
荷に対し負荷遮断信号を転送遮断装置７ａに出力する
（ステップＳＴ１５）。さらに、発電機１ａ，２ａの電
源脱落後、ｔ秒にて発電機１ｂ，２ｂが電源脱落した場
合、次演算周期のステップＳＴ１２で事故ケースを認識
した後、ステップＳＴ１３で必要負荷制限量を算出す
る。Here, when Pga ≦ Pa, the required load limit amount Plfa becomes a negative value, and the load limit is not executed (step ST14). On the other hand, in the case of Pga> Pa, based on the required load limit amount Plfa, the load that is the smallest combination exceeding this is selected to be cut off, and a load cutoff signal is output to the transfer cutoff device 7a for the selected load ( Step ST15). Further, when the power sources of the generators 1a and 2a are dropped at t seconds after the power sources of the generators 1a and 2a are dropped, after the accident case is recognized in step ST12 of the next calculation cycle, the necessary load limit amount is calculated in step ST13. To do.
【００２６】すなわち、ΣＰｇ＝Ｐｇａｂ＋Ｐｇｂ（Ｐ
ｇｂ＝Ｐｇｂ1 ＋Ｐｇｂ2 ），ΣＰｇａ＝Ｐｇａ，ΣＰ
ｇｂ＝Ｐｇｂ，および数５の今まで系統安定化装置４
ａ，４ｂが遮断したトータル必要負荷制限量を、数３，
数４に代入すると、それぞれ数７，数８のようになる。
なお、系統安定化装置４ｂについては、Ｐｌｆｂの算出
式に基づく必要負荷制限量となる。That is, ΣPg = Pgab + Pgb (P
gb = Pgb 1 + Pgb 2 ), ΣPga = Pga, ΣP
gb = Pgb, and up to now the system stabilizer 4 of the number 5
The total required load limiting amount blocked by a and 4b is given by
Substituting into Equation 4 gives Equations 7 and 8, respectively.
For the system stabilizing device 4b, the required load limit amount is based on the Plfb calculation formula.
【００２７】[0027]
【数７】 [Equation 7]
【００２８】[0028]
【数８】 [Equation 8]
【００２９】ここで、系統全体として行われたトータル
負荷制限量Ｐｌｆｔは、数９のようになる。Here, the total load limiting amount Plft performed for the entire system is as shown in equation 9.
【００３０】[0030]
【数９】 [Equation 9]
【００３１】このトータル負荷制限量は、発電機１ａ，
２ａ，１ｂ，２ｂが同時に電源脱落した場合の必要負荷
制限量に等しい。すなわち、系統全体の電源脱落量で求
めた必要負荷制限量に対し、各ブロック系統（各電力系
統）の電源脱落量の比率で負荷制限量を比例配分するこ
とにより、複数のブロック系統において、電源脱落がラ
ンダムに発生した場合でも、不足制御となることなく、
事故が発生した時点で、各ブロック系統に設置された、
系統安定化装置が非同期に負荷制限を行うことで、系統
を安定化することができることとなる。This total load limit is determined by the generator 1a,
This is equal to the required load limiting amount when the power supplies of 2a, 1b, and 2b are simultaneously disconnected. That is, by proportionally distributing the load limit amount by the ratio of the power loss amount of each block system (each power system) to the required load limit amount obtained by the power loss amount of the entire system, the power supply is reduced in multiple block systems. Even if the dropouts occur randomly, without insufficient control,
When the accident occurred, it was installed in each block system,
Since the system stabilizer asynchronously limits the load, the system can be stabilized.
【００３２】実施例２．なお、上記実施例では系統全体
の必要負荷制限量を各ブロックの電源脱落量の比率で配
分する様にしたが、この配分する比率ｘを設定する様に
しても良い。このときの必要負荷量の算出式は、数１
０，数１１の通りとなる。Example 2. In the above embodiment, the required load limit amount of the entire system is distributed by the ratio of the power supply dropout amount of each block, but this distribution ratio x may be set. At this time, the formula for calculating the required load is
0, as shown in Equation 11.
【００３３】[0033]
【数１０】 [Equation 10]
【００３４】[0034]
【数１１】 [Equation 11]
【００３５】[0035]
【発明の効果】以上のように、この発明によれば電力系
統全体の電源脱落量に対する各電力系統の電源脱落量の
比率を求め、上記電力系統全体としての必要負荷制限量
を各電力系統ごとの上記比率で配分し、該配分量に基づ
き非同期で負荷制限を実施させる機能を、系統安定化装
置に持たせるように構成したので、複数の電力系統にま
たがる電源脱落が発生した場合でも、不足制御となるこ
となく、精度良く負荷制限を実施できるとともに、各電
力系統を安定させることができ、かつ負荷制限による各
電力系統間の潮流変動を小さくすることができ、しか
も、この負荷制限動作をスイッチを使うことによって簡
単かつ安価に実現できるものが得られる効果がある。As described above, according to the present invention, the ratio of the power loss amount of each power system to the power loss amount of the entire power system is obtained, and the necessary load limit amount of the power system is calculated for each power system. Since the system stabilizer is configured to have a function of performing the load distribution asynchronously based on the above-mentioned distribution ratio even if a power loss occurs across multiple power systems, it is insufficient. The load can be accurately controlled without control, each power system can be stabilized, and the power flow fluctuation between each power system due to the load restriction can be reduced. By using the switch, there is an effect that the one that can be realized easily and at low cost is obtained.
【図１】この発明の一実施例による電力系統の負荷制限
装置を示すシステム構成図である。FIG. 1 is a system configuration diagram showing a load limiting device for a power system according to an embodiment of the present invention.
【図２】この発明による負荷制限動作を示すフローチャ
ート図である。FIG. 2 is a flowchart showing a load limiting operation according to the present invention.
【図３】従来の電力系統の負荷制限装置を示すシステム
構成図である。FIG. 3 is a system configuration diagram showing a conventional load limiting device for a power system.
【図４】従来の負荷制限動作を示すフローチャート図で
ある。FIG. 4 is a flowchart showing a conventional load limiting operation.
Ａ，Ｂ 電力系統 １ａ，１ｂ，２ａ，２ｂ 発電機 ３ａ，３ｂ 端末装置 ４ａ，４ｂ 系統安定化装置 ５ａ，５ｂ 第１の情報伝送装置 ６ａ，６ｂ 第２の情報伝送装置 ７ａ，７ｂ 転送遮断装置 Ｙ１，Ｙ２，Ｙ３，Ｙ４ 情報伝達手段 A, B Power system 1a, 1b, 2a, 2b Generator 3a, 3b Terminal device 4a, 4b System stabilizing device 5a, 5b First information transmission device 6a, 6b Second information transmission device 7a, 7b Transfer blocking device Y1, Y2, Y3, Y4 information transmission means
Claims (1)
ごとに、それぞれ独立して電力を供給する複数の発電機
と、上記送電線の系統事故を検出して、事故検出信号を
出力する端末装置と、上記電力系統ごとに送電線の潮流
情報を検出して送信する第１の情報伝送装置と、該第１
の情報伝送装置からの潮流情報にもとづいて演算した必
要負荷制限量に応じて、負荷制限指令を出力する系統安
定化装置と、上記必要負荷制限量に応じた負荷量を選択
するために必要な負荷線の潮流情報を送信する第２の情
報伝送装置と、上記各系統安定化装置から各電力系統へ
上記負荷制限指令を送出する転送遮断装置とを備えた電
力系統の負荷制限装置において、上記各系統安定化装置
に対し互いに他の電力系統側の上記端末装置および第１
の情報伝送装置の出力を入力させ、上記系統安定化装置
において、上記電力系統全体の電源脱落量に対する各電
力系統の電源脱落量の比率を求め、上記電力系統全体と
しての必要負荷制限量を各電力系統ごとの上記比率で配
分し、該配分量に基づき非同期で負荷制限を実施させる
情報伝達手段を設けたことを特徴とする電力系統の負荷
制限装置。Claim: What is claimed is: 1. A plurality of generators that independently supply electric power to each of a plurality of electric power systems connected by a transmission line, and a system fault of the transmission line is detected to detect an accident. A terminal device that outputs a detection signal, a first information transmission device that detects and transmits power flow information of a transmission line for each of the power systems, and the first information transmission device.
It is necessary to select a system stabilizer that outputs a load limit command according to the required load limit amount calculated based on the power flow information from the information transmission device and a load amount according to the required load limit amount. A load limiting device for a power system, comprising: a second information transmitting device for transmitting power flow information of a load line; and a transfer interrupting device for sending the load limiting command from each of the system stabilizing devices to each of the power systems. The above-mentioned terminal device and the first device on the other power system side with respect to each system stabilizing device
Input the output of the information transmission device, and in the system stabilization device, obtain the ratio of the power loss amount of each power system to the power loss amount of the entire power system, and determine the required load limit amount of the power system as a whole. A load limiting device for a power system, comprising: information transmission means for allocating at the above ratio for each power system and asynchronously performing load restriction based on the distribution amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03188355A JP3109608B2 (en) | 1991-07-03 | 1991-07-03 | Power system load limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03188355A JP3109608B2 (en) | 1991-07-03 | 1991-07-03 | Power system load limiting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0515064A true JPH0515064A (en) | 1993-01-22 |
| JP3109608B2 JP3109608B2 (en) | 2000-11-20 |
Family
ID=16222177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03188355A Expired - Lifetime JP3109608B2 (en) | 1991-07-03 | 1991-07-03 | Power system load limiting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3109608B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6178302B1 (en) | 1997-12-09 | 2001-01-23 | Canon Kabushiki Kaisha | Developer container seal, developer container, developing apparatus, process cartridge, and image forming apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5291144A (en) * | 1976-01-28 | 1977-08-01 | Mitsubishi Electric Corp | Load control apparatus for electric power system |
| JPS62160038A (en) * | 1986-01-06 | 1987-07-16 | 中部電力株式会社 | System stabilizer |
-
1991
- 1991-07-03 JP JP03188355A patent/JP3109608B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5291144A (en) * | 1976-01-28 | 1977-08-01 | Mitsubishi Electric Corp | Load control apparatus for electric power system |
| JPS62160038A (en) * | 1986-01-06 | 1987-07-16 | 中部電力株式会社 | System stabilizer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6178302B1 (en) | 1997-12-09 | 2001-01-23 | Canon Kabushiki Kaisha | Developer container seal, developer container, developing apparatus, process cartridge, and image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3109608B2 (en) | 2000-11-20 |
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