JP3886427B2 - Total protection method for each power system and its total protection device - Google Patents

Total protection method for each power system and its total protection device Download PDF

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JP3886427B2
JP3886427B2 JP2002223961A JP2002223961A JP3886427B2 JP 3886427 B2 JP3886427 B2 JP 3886427B2 JP 2002223961 A JP2002223961 A JP 2002223961A JP 2002223961 A JP2002223961 A JP 2002223961A JP 3886427 B2 JP3886427 B2 JP 3886427B2
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station
protection
control
control station
controlled
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JP2004064974A (en
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善則 平田
友祥 佐藤
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Chugoku Electric Power Co Inc
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Chugoku Electric Power Co Inc
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Description

【0001】
【発明の属する技術分野】
本発明は、電気所間の送電線の状態及び変電所に設置された変圧器などの電気機器の状態を総合的に監視すると共に、その故障等の保護を行う電力系統単位のトータル保護方法及びこのトータル保護装置に関するものである。
【0002】
【従来の技術】
火力、水力及び原子力等の発電所で発電した電気は、効率的に送電するために電圧を昇圧して送電線で変電所等の電気所に送り、そこで降圧し、送電線で更に他の変電所へ送電したり、送電線や配電線を通して需要家に送り届けられる。このように、変電所は、電圧の変成、即ち電力を経済的に輸送するために主として変圧と電力の集中、あるいは配分を主な目的として設けられたものである。この他に、変電所等の電気所は、電気の質を維持し、設備を保全するために、電圧調整、電力潮流制御、系統安定度の向上並びに送配電線及び変電所自身の保護、即ち関連設備の電気的あるいは機械的な保護を行っている。
【0003】
このような変電所等の電気所の使命を果たすためには、必要な設備を具備することは勿論であるが、変電所等の運転保守が容易、確実、安全に実施される必要がある。このために、変電所等には、運転が容易に行えるように配電盤や制御卓等の監視制御装置を設けている。
【0004】
また、保守においても設備上の配慮が種々施されている。即ち、変電所等における電力系統は、その大部分が自然環境にさらされているため、雷害、塩害、風水害等の自然現象の影響を受け、電気的故障に到ることがある。また、系統内部からの異常電圧や機器の不良も電気的故障の原因となる。これらの故障や未然防止と故障発生時の波及防止のために、種々の保護方法が実施されている。
【0005】
図5は従来の変電所における保護方法を示す説明図である。ここで、変電所間を結ぶ実線は電線路であり、破線は情報伝送路である。
また、複数の配電用変電所51(図示上、B、C,D,E変電所)と送電線でつながっている連系変電所52(図示上、A、G変電所)では、親側となる連系変電所52は元より子側となる変電所51の何れにも保護装置を設けていた。そこで、保護装置を設けて関連設備の電気的あるいは機械的な保護を行っていた。
【0006】
図6は従来の配電用変電所における保護装置の構成例を示す説明図である。
各変電所51及び連系変電所52には、保護装置となる汎用リレー盤やCrリレー盤には、入力変換器53、演算処理部54、整定・表示部55、スイッチ部56、トリップTT(遮断指令ロック端子),PTT(電圧試験用端子)及びCTT(電流試験用端子)57を備えたものである。事故が発生したときに、各配電用変電所51で演算処理部54によって事故の生じた送電線を選択し、各変電所51を遮断していた。
【0007】
【発明が解決しようとする課題】
このように、従来の変電所の保護方法では、制御される子側となる配電用変電所51とこれらを制御する親側となる連系変電所52の何れにも演算機能(演算処理部54等)が必要であった。また、親側となる連系変電所52では、各回線の演算処理部54をユニット単位でひとつの筐体に収納する方式であるために、設備面でのコストが増大するという問題を有していた。更に、演算処理部54の不具合対応や保護装置の取替も個々に行う必要があり、その運用回線への影響と制約があった。
【0008】
また、従来の保護方法では、一部を除きタイマーによる時限協調をとる必要があるために、遮断時間の短縮に限界があり、送電線に過電流が流れると、電力系統安定度の低下や瞬時電圧低下の影響が拡大する等という問題を有していた。
【0009】
本発明は、かかる問題点を解決するために創案されたものである。すなわち、本発明の目的は、各送電線を保護するうえで必要な情報を一箇所に集めて、共通の演算処理装置等によって一括保護することで、保護方法の一本化を図り、リモートメンテナンス機能による保守の省力化を図り、遮断時間の高速化と既存の送電線保護機能に加え、遠隔監視制御機能やリモートメンテナンス機能などの各種機能を統合することにより設備のスリム化を図ることができる電力系統単位のトータル保護方法及びこのトータル保護装置を提供することにある。
【0010】
【課題を解決するための手段】
本発明の保護方法によれば、発電所の電気が送電される変電所等の各電気所及び送電線に発生する事故等を監視し、その保護処置を行う電力系統単位のトータル保護方法であって、配電用変電所のような被制御局(1)となる複数の電気所の保護に必要な情報を制御局(2)となる連系変電所に集中するように伝送するために、各被制御局(1)と制御局(2)との間に保護情報ネットワーク(4)を形成し、更に、前記制御局(2)と制御局(2)との間にも保護情報ネットワーク(5)を形成し、前記保護情報ネットワーク(5)に常時監視制御箇所(6)を接続して、遠隔監視制御又はリモートメンテナンス制御し、前記制御局(2)における共通の演算処理装置(3)により、制御局(2)と被制御局(1)の間の送電線で発生する事故等を一括監視し、かつその送電線保護機能、母線保護機能等の「保護機能」、故障点標定機能又は事故記録機能等の「計測機能」、及び電圧予測制御機能又は調相設備制御機能等の「制御機能」に関する保護処置を一括行う、とを特徴とする電力系統単位のトータル保護方法が提供される。
【0012】
前記被制御局(1)から前記制御局(2)に対して、その保護処置に必要な情報を集中するように伝送し、前記制御局(2)の演算処理装置(3)により、事故の生じた被制御局(1)を選択し、前記制御局(2)からの信号により、事故の生じた前記被制御局(1)がその保護処置を行うトータル保護方法もある。
【0013】
前記被制御局(1)と制御局(2)間の情報は、情報の発信元が判別できるように固有のID番号を付して伝送する、ことが好ましい。
【0014】
上記構成の保護方法では、連系変電所から複数の送電線(配電用変電所)が引き出されている系統において,各送電線を保護するうえで必要な情報を制御局(2)の一箇所に集めて、共通の演算処理装置(3)等によって一括保護することができるので、保護方式の一本化やリモートメンテナンス機能による保守の省力化ができる。遮断時間の高速化が図れるので、送電線に過電流が流れることを短時間で阻止することができる。特に、制御局(2)と制御局(2)との間に形成した保護情報ネットワーク(5)に接続した常時監視制御箇所(6)により、遠隔監視制御機能で制御することができる。
【0015】
本発明の保護装置によれば、発電所の電気が送電される変電所等の各電気所及び送電線に発生する事故等を監視し、その保護処置を行う電力系統単位のトータル保護装置であって、配電用変電所のような複数の被制御局(1)から、連系変電所のような複数の制御局(2)に保護に必要な情報を集中するように伝送するための保護情報ネットワーク(4)と、前記制御局(2)と制御局(2)との間に形成された保護情報ネットワーク(5)に接続された、遠隔監視制御機能又はリモートメンテナンス機能により制御する常時監視制御箇所(6)と、前記被制御局(1)において事故の生じた被制御局(1)又は送電線を選択するために前記制御局(2)に設けられた、ユニット単位でひとつの筐体に収納された演算処理装置(3)と、前記制御局(2)からの信号により、事故の生じた被制御局(1)又は送電線を処置するために該被制御局(1)に設けられた遮断装置等の保護装置と、を備えた、ことを特徴とする電力系統単位のトータル保護装置が提供される。
【0016】
上記構成の保護装置では、被制御局(1)から保護機能に必要な情報を制御局(2)に伝送し、制御局(2)の演算処理装置によって事故送電線を選択し、制御局(2)からの信号により被制御局(1)を遮断するものであるために、各被制御局(1)における演算機能は省略することができる。特に、既存の送電線保護機能に加え、遠隔監視制御機能やリモートメンテナンス機能などの各種機能を有する時監視制御箇所(6)を統合することにより、設備のスリム化を図ることができる
【0017】
前記演算処理装置(3)は、ユニット単位でひとつの筐体に収納することにより、ハード面でのコストを低減することができる。
【0018】
前記演算処理装置(3)は、その不具合対応や保護装置をユニット単位で交換しえるように構成したので、運用回線への影響・制約を最小限におさえることができる。
【0019】
前記演算処理装置(3)は、装置故障時の保護信頼度を確保するために複数台設置することにより、装置故障時の保護信頼度を確保することができる。
【0020】
【発明の実施の形態】
以下、本発明の好ましい実施の形態を図面を参照して説明する。
図1は本発明の電力系統単位のトータル保護方法及びそのトータル保護装置の第一の実施の形態を示す説明図である。ここで電気所とネットワーク間を結ぶ実線は情報伝送路であり、破線はシステム間バックアップ用の情報伝送路である。
第一の実施の形態は、配電用変電所のような被制御局1となる多数の電気所についてその保護に必要な情報を、複数の制御局2となる連系変電所に集中させるように構成したものである。即ち、被制御局1となる各電気所A,B,C,D,Eについては、これらの電気所及び送電線を保護する際に必要な情報を、2ヵ所の制御局2となる連系変電所Aに集中させたものである。また、被制御局1となる各電気所F,G,Hについては、これらの電気所及び送電線を保護する際に必要な情報を制御局2となる連系変電所Bに集中させ、各制御局2,2における共通の演算処理装置3により、多数の被制御局1,1・・で発生する事故等を一括監視し、かつその一括保護を行うものである。被制御局1の送電線の保護を代表端判別電流差動方式に一本化し、制御局2の演算処理装置(1:N形送電線保護)3により各回線を一括保護する。
【0021】
各被制御局(電気所)1と制御局2の間に保護情報ネットワーク4を形成し、発電所の電気が送電される制御局2(連系変電所A)及び各被制御局1(電気所A,B,C,D,E)並びに送電線に発生する事故等を監視する。事故が発生したときは、その被制御局1の保護処置を行う。同様に、制御局2(連系変電所B)と各被制御局1(電気所F,G,H)との間に保護情報ネットワーク4を形成し、この保護情報ネットワーク4を介して送電線に発生する事故等を監視し、その保護処置を行う。なお、図示例では、制御局2が連系変電所AとBの2グループの保護情報ネットワーク4を説明してあるが、保護する際に必要な情報を制御局2に集中させる構成であれば、保護情報ネットワーク4を更に複数形成することは可能である。
【0022】
制御局2は、各被制御局1から、各電気所情報を保護情報ネットワーク4を介して受け取り、共通の演算処理装置3により一括保護を行う際に、各電気所間の保護回路を代表した演算処理装置3で保護する。このように、保護方式の一本化やリモートメンテナンス機能による保守の省力化を図り、過電流による事故が発生したときにはその遮断時間の高速化が図れるようになっている。被制御局1には情報収集端末7のみを設け、既存のディジタル形リレーによるバックアップ装置は設置しない。
【0023】
図2は連系変電所と配電用変電所の配置を示す説明図である。ここで、変電所間又は変電所とネットワーク間を結ぶ実線は電線路であり、破線は情報伝送路である。
また、本発明のトータル保護方法は、図示するように各被制御局1(配電用変電所B,C,D,E)と制御局2(連系変電所A)との間に保護情報ネットワーク4を形成し、各被制御局1(配電用変電所B,C,D,E)並びに送電線に発生する事故等を各配電用変電所B,C,D,Eの情報端末7から保護情報ネットワーク4へ送信するように構成することができる。即ち、各被制御局1(配電用変電所B,C,D,E)並びに送電線において事故が発生したときは、保護情報ネットワーク4を介してその被制御局1の演算処理装置3を介して保護処置を行うようになっている。
【0024】
図3は被制御局における情報端末の構成例を示す説明図である。
各被制御局1における情報端末7は、情報伝送部8、入力変換器9及びトリップロックTTやスイッチ類のハード部分10のみを備えたものである。従来の各被制御局1のように演算処理部54や整定・表示部55等が各被制御局1に必要がない(図6参照)。そこで、被制御局1における情報端末7に関する設備を低減できる。
【0025】
なお、演算処理装置3は、ハード面でのコストを低減するために、制御局2においてユニット単位でひとつの筐体に収納する。演算処理装置3は、その不具合対応や保護装置をユニット単位で交換しえるように構成すると、運用回線への影響・制約を最小限におさえることができる。更に、演算処理装置3は、装置故障時の保護信頼度を確保するために複数台設置することにより、装置故障時の保護信頼度を確保するようになっている。ユニット間は、インターフェイスを統一(固定化)することにより、設備の更新に際し、装置一式交換からユニット交換方式にしてコストを低減にする。
【0026】
制御局2と制御局2との間にも保護情報ネットワーク5を形成し、これを介して情報伝送する。このようにすることで、制御局2の相互にシステム間バックアップを行うことができる。
【0027】
更に、図1に示したように、制御局2(連系変電所A)の保護情報ネットワーク4は、被制御局1(電気所F,G,H)から電気所情報を受け取ることにより、システム間バックアップを可能としている。同様に、制御局2(連系変電所B)の保護情報ネットワーク4は、被制御局1(電気所A,B,C,D,E)から電気所情報を受け取ることにより、システム間バックアップを可能としている。
【0028】
被制御局1と制御局2間の情報は、情報の発信元が判別できるように固有のID番号を付して伝送することが好ましい。また、時刻同期をとることにより、被制御局1と制御局2での情報取込の同期をとり保護機能の演算を行うことも可能である。
【0029】
図4は本発明の電力系統単位のトータル保護方法及びこのトータル保護装置の第二の実施の形態を示す説明図である。
第二の実施の形態は、制御局2と制御局2との間に形成した保護情報ネットワーク5に常時監視制御箇所6に接続したものである。この保護情報ネットワーク5と常時監視制御箇所6とは遠隔監視制御機能又はリモートメンテナンス機能により制御するようになっている。更に、この保護情報ネットワーク5にGPSにより時刻同期することができる。このように時刻同期をとる手段で各電気所での情報取込の同期をとり保護機能の演算を行うことができる。
【0030】
本発明の電力系統単位のトータル保護方法及びそのトータル保護装置は、保護機能、計測機能又は制御機能等と統合することが可能である。ここで「保護機能」としては、送電線保護機能、母線保護機能、機器過負荷検出機能、周波数検出機能、系統安定化機能、脱調検出機能、再閉路機能、リモート整定機能又は遠隔保守/遠隔診断機能等がある。「計測機能」としては、故障点標定機能、事故記録機能又は変圧器過負荷監視機能等がある。更に、「制御機能」としては、電圧予測制御機能、調相設備制御機能又は遠隔監視制御機能等がある。各電気所における定常時及び事故発生時の交流電気量を変換する装置をハード面で共有化することができる。そこで、変換した情報を使って,電力会社として必要な各種機能を合理的に組み合わせたトータル保護方法を構築することが可能である。
【0031】
なお、本発明は上述した発明の実施の形態に限定されず、電気所及び送電線を保護する上で必要な情報を一箇所に集めて、共通の演算処理装置等によって一括保護する方法であれば、上述した構成に限定されず、本発明の要旨を逸脱しない範囲で種々変更できることは勿論である。
【0032】
【発明の効果】
本発明の電力系統単位のトータル保護方法は、被制御局の送電線保護を代表端判別電流差動方式に一本化し、制御局の演算処理装置(1:N形送電線保護)により各回線を一括保護する。また、保護方式の一本化やリモートメンテナンス機能による保守の省力化ができる。更に、遮断時間の高速化を図ることができる。
【0033】
本発明の電力系統単位のトータル保護装置は、多数の被制御局は情報収集端末のみとし、既存のディジタル形リレーによるバックアップ装置を設置する必要がないので、被制御局の設備を削減できる。ユニット間インターフェイスを統一(固定化)することにより、設備の更新に対応させるために装置一式を交換する必要がなく、ユニット交換で完了できるので、設備コストの低減を図ることができる。
【0034】
一方、既存の送電線保護機能に加え、遠隔監視制御機能やリモートメンテナンス機能などの各種機能を統合することにより、設備のスリム化を図ることができる、等の効果がある。
【図面の簡単な説明】
【図1】本発明の電力系統単位のトータル保護方法及びこのトータル保護装置の第一の実施の形態を示す説明図である。
【図2】連系変電所と配電用変電所の配置を示す説明図である。
【図3】被制御局における情報端末の構成例を示す説明図である。
【図4】第二の実施の形態を示す説明図である。
【図5】従来の変電所における保護方法を示す説明図である。
【図6】従来の配電用変電所における保護装置の構成例を示す説明図である。
【符号の説明】
1 被制御局(電気所、配電用変電所)
2 制御局(連系変電所)
3 演算処理装置
4 保護情報ネットワーク(制御局と被制御局)
5 保護情報ネットワーク(制御局間同士)
[0001]
BACKGROUND OF THE INVENTION
The present invention comprehensively monitors the state of a transmission line between electric stations and the state of an electric device such as a transformer installed in a substation, and also provides a total protection method for each power system that protects the failure and the like. The present invention relates to the total protection device.
[0002]
[Prior art]
Electricity generated at thermal, hydro, and nuclear power plants is boosted in voltage and sent to a power station such as a substation via a transmission line for efficient transmission. Power is transmitted to the station, and is sent to the customer through the transmission line and distribution line. In this way, the substation is provided mainly for voltage transformation, that is, mainly for the transformation or concentration or distribution of power in order to transport power economically. In addition to this, electric stations such as substations are designed to maintain voltage quality, maintain facilities, and adjust voltage, control power flow, improve system stability, and protect transmission lines and substations themselves. Provides electrical or mechanical protection for related equipment.
[0003]
In order to fulfill the mission of such an electric station such as a substation, it is of course necessary to provide necessary facilities, but operation and maintenance of the substation and the like need to be performed easily, surely and safely. For this purpose, a substation or the like is provided with a monitoring control device such as a switchboard or a control console so that the operation can be easily performed.
[0004]
In addition, various considerations for equipment are given for maintenance. That is, most of the power systems in substations and the like are exposed to the natural environment, and thus may be affected by natural phenomena such as lightning damage, salt damage, storm and flood damage, etc., leading to electrical failure. In addition, abnormal voltages from the inside of the system and device failures also cause electrical failures. Various protection methods have been implemented in order to prevent these failures and occurrences, and to prevent the occurrence of failures.
[0005]
FIG. 5 is an explanatory diagram showing a protection method in a conventional substation. Here, the solid line connecting the substations is an electric line, and the broken line is an information transmission line.
Moreover, in the interconnection substation 52 (A and G substations in the figure) connected to a plurality of distribution substations 51 (B, C, D, and E substations in the figure) by transmission lines, the parent side The connected substation 52 is provided with a protective device in any of the substations 51 on the child side. Therefore, a protection device was provided to protect the related facilities electrically or mechanically.
[0006]
FIG. 6 is an explanatory diagram showing a configuration example of a protection device in a conventional distribution substation.
In each substation 51 and interconnection substation 52, a general-purpose relay panel or Cr relay panel serving as a protective device includes an input converter 53, an arithmetic processing unit 54, a settling / display unit 55, a switch unit 56, a trip TT ( This is provided with a cutoff command lock terminal), a PTT (voltage test terminal), and a CTT (current test terminal) 57. When an accident occurred, the power transmission line where the accident occurred was selected by the arithmetic processing unit 54 in each distribution substation 51, and each substation 51 was shut off.
[0007]
[Problems to be solved by the invention]
As described above, in the conventional method for protecting a substation, the calculation function (calculation processing unit 54) is applied to both the distribution substation 51 serving as the controlled child side and the interconnected substation 52 serving as the parent side controlling these. Etc.) was necessary. In addition, the interconnection substation 52 on the parent side has a problem that the cost in terms of equipment increases because the arithmetic processing unit 54 of each line is stored in one housing in units. It was. Furthermore, it is necessary to individually deal with malfunctions in the arithmetic processing unit 54 and to replace the protection device, which has an influence and restrictions on the operation line.
[0008]
In addition, with conventional protection methods, it is necessary to use timed coordination with a timer except for a part, so there is a limit to shortening the cut-off time, and if overcurrent flows in the transmission line, the stability of the power system decreases or instantaneously There was a problem that the influence of the voltage drop expanded.
[0009]
The present invention has been developed to solve such problems. That is, an object of the present invention is to collect information necessary for protecting each transmission line in one place and collectively protect it with a common arithmetic processing unit or the like, thereby consolidating a protection method and remote maintenance. Maintenance of functions can be saved, and the equipment can be streamlined by integrating various functions such as remote monitoring and control functions and remote maintenance functions in addition to faster shut-off time and existing transmission line protection functions. An object of the present invention is to provide a total protection method and a total protection device for each power system.
[0010]
[Means for Solving the Problems]
The protection method of the present invention is a total protection method for each electric power system that monitors accidents and the like occurring in each electric power station such as a substation where power from the power plant is transmitted, and transmission lines, and performs the protective measures. In order to transmit information necessary for protection of a plurality of electric stations that are controlled stations (1) such as distribution substations to be concentrated in the interconnected substation that is the control station (2) , A protection information network (4) is formed between each controlled station (1) and control station (2), and a protection information network (2) is also formed between the control station (2) and the control station (2). 5), the monitoring information control point (6) is connected to the protection information network (5), the remote monitoring control or the remote maintenance control is performed, and the common processing unit (3) in the control station (2) , the occurrence the control station (2) in the transmission line between the control station (1) That the accident collectively monitored, and the power transmission line protection, "Protection" such as busbar protection, "Measurement Function" such fault point locating function or accident recording function, and the voltage prediction control function or phase modifying equipment control There is provided a total protection method for each power system, characterized in that protection measures relating to “control functions” such as functions are collectively performed.
[0012]
The control station (1) transmits to the control station (2) the information necessary for the protection process so as to concentrate, and the arithmetic processing unit (3) of the control station (2) There is also a total protection method in which the controlled station (1) that has occurred is selected, and the controlled station (1) in which an accident has occurred is protected by a signal from the control station (2).
[0013]
The information between the controlled station (1) and the control station (2) is preferably transmitted with a unique ID number so that the source of the information can be identified.
[0014]
In the protection method having the above configuration, in a system in which a plurality of transmission lines (distribution substations) are drawn from the interconnection substation, information necessary for protecting each transmission line is provided in one place of the control station (2). Since they can be collectively protected by a common arithmetic processing unit (3) or the like, it is possible to consolidate the protection method and save labor by the remote maintenance function. Since the cut-off time can be increased, it is possible to prevent overcurrent from flowing through the transmission line in a short time. In particular, it can be controlled by the remote monitoring control function by the constant monitoring control point (6) connected to the protection information network (5) formed between the control station (2) and the control station (2).
[0015]
The protection device according to the present invention is a total protection device for each power system that monitors accidents and the like occurring in each electric power station such as a substation to which electricity of the power plant is transmitted and a transmission line, and performs the protective measures. Protection information for transmitting information necessary for protection from a plurality of controlled stations (1) such as distribution substations to a plurality of control stations (2) such as interconnected substations. Continuous monitoring control controlled by a remote monitoring control function or a remote maintenance function connected to the network (4) and the protection information network (5) formed between the control station (2) and the control station (2). One unit for each unit provided in the control station (2) to select the location (6) and the controlled station (1) in which the accident occurred in the controlled station (1) or the transmission line housed in the processing unit (3), the By a signal from the control station (2), provided with a protective device of the shut-off device or the like provided to said control station (1) to treat the controlled station (1) or transmission lines caused an accident A total protection device for each electric power system is provided.
[0016]
In the protection device having the above configuration, information necessary for the protection function is transmitted from the controlled station (1) to the control station (2), the accident power transmission line is selected by the arithmetic processing unit of the control station (2), and the control station ( Since the controlled station (1) is blocked by the signal from 2), the calculation function in each controlled station (1) can be omitted. In particular, by integrating the time monitoring control point (6) having various functions such as a remote monitoring control function and a remote maintenance function in addition to the existing power transmission line protection function, the equipment can be made slim .
[0017]
The arithmetic processing unit (3) can be reduced in hardware cost by being housed in a single case in units.
[0018]
Since the arithmetic processing unit (3) is configured so that the failure handling and protection device can be replaced in units, it is possible to minimize the influence / restriction on the operation line.
[0019]
By installing a plurality of the arithmetic processing units (3) in order to ensure the protection reliability at the time of device failure, it is possible to ensure the protection reliability at the time of device failure.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory diagram showing a first embodiment of a total protection method and a total protection device for each power system according to the present invention. Here, a solid line connecting the electric station and the network is an information transmission path, and a broken line is an information transmission path for intersystem backup.
In the first embodiment, information necessary for protection of a large number of electrical stations that are controlled stations 1 such as distribution substations is concentrated in a connected substation that is a plurality of control stations 2. It is composed. That is, for each of the electric stations A, B, C, D, and E to be controlled stations 1, information necessary for protecting these electric stations and transmission lines is connected to the two control stations 2 It is concentrated at substation A. For each of the electric stations F, G, H serving as the controlled station 1, information necessary for protecting these electric stations and transmission lines is concentrated in the interconnection substation B serving as the control station 2, and A common arithmetic processing unit 3 in the control stations 2 and 2 collectively monitors accidents and the like occurring in a large number of controlled stations 1, 1. The transmission line protection of the controlled station 1 is unified to the representative end discrimination current differential method, and each line is collectively protected by the arithmetic processing unit (1: N-type transmission line protection) 3 of the control station 2.
[0021]
A protection information network 4 is formed between each controlled station (electricity station) 1 and the control station 2, and the control station 2 (connected substation A) to which electricity from the power plant is transmitted and each controlled station 1 (electricity) (A), (B), (C), (D), (E) and accidents occurring in the transmission lines are monitored. When an accident occurs, the control station 1 is protected. Similarly, a protection information network 4 is formed between the control station 2 (interconnection substation B) and each controlled station 1 (electric stations F, G, H), and the transmission line is transmitted via the protection information network 4. Monitor accidents that occur in Japan and take protective measures. In the illustrated example, the control station 2 has described the two groups of protection information networks 4 of the interconnection substations A and B. However, if the configuration is such that the information necessary for protection is concentrated on the control station 2. A plurality of protection information networks 4 can be formed.
[0022]
When the control station 2 receives each electrical station information from each controlled station 1 via the protection information network 4 and performs collective protection by the common arithmetic processing unit 3, it represents a protection circuit between the electrical stations. It is protected by the arithmetic processing unit 3. In this way, it is possible to reduce the maintenance time by unifying the protection method and the remote maintenance function, and to speed up the interruption time when an accident due to overcurrent occurs. The controlled station 1 is provided with only the information collecting terminal 7 and no backup device using an existing digital relay is installed.
[0023]
FIG. 2 is an explanatory diagram showing the arrangement of the interconnection substation and the distribution substation. Here, a solid line connecting substations or between a substation and a network is an electric wire path, and a broken line is an information transmission path.
Further, the total protection method of the present invention is a protection information network between each controlled station 1 (distribution substation B, C, D, E) and control station 2 (interconnection substation A) as shown in the figure. 4 to protect each controlled station 1 (distribution substations B, C, D, E) and accidents occurring in the transmission lines from the information terminals 7 of each distribution substation B, C, D, E It can be configured to transmit to the information network 4. In other words, when an accident occurs in each controlled station 1 (distribution substations B, C, D, E) and the transmission line, it passes through the protection information network 4 via the arithmetic processing unit 3 of the controlled station 1. Protective measures are taken.
[0024]
FIG. 3 is an explanatory diagram showing a configuration example of the information terminal in the controlled station.
The information terminal 7 in each controlled station 1 includes only the information transmission unit 8, the input converter 9, the trip lock TT, and the hardware part 10 of switches. Unlike the conventional controlled stations 1, the arithmetic processing unit 54, the settling / display unit 55 and the like are not required for each controlled station 1 (see FIG. 6). Therefore, facilities related to the information terminal 7 in the controlled station 1 can be reduced.
[0025]
Note that the arithmetic processing unit 3 is housed in a single unit in units of units in the control station 2 in order to reduce hardware costs. If the arithmetic processing unit 3 is configured so that the failure handling and protection device can be replaced in units, it is possible to minimize the influence / restriction on the operation line. Further, a plurality of arithmetic processing devices 3 are installed in order to ensure the protection reliability in the event of a device failure, thereby ensuring the protection reliability in the event of a device failure. By unifying (fixing) the interface between units, it is possible to reduce costs by switching from complete device replacement to unit replacement when updating equipment.
[0026]
A protection information network 5 is also formed between the control station 2 and the control station 2, and information is transmitted through this network. By doing so, it is possible to perform intersystem backup between the control stations 2.
[0027]
Further, as shown in FIG. 1, the protection information network 4 of the control station 2 (interconnection substation A) receives the electric station information from the controlled station 1 (electric stations F, G, H), thereby Backup is possible. Similarly, the protection information network 4 of the control station 2 (interconnected substation B) receives the electric station information from the controlled station 1 (electric stations A, B, C, D, E), thereby performing intersystem backup. It is possible.
[0028]
Information between the controlled station 1 and the control station 2 is preferably transmitted with a unique ID number so that the source of the information can be identified. In addition, by synchronizing the time, it is possible to perform a protection function calculation by synchronizing information capture between the controlled station 1 and the control station 2.
[0029]
FIG. 4 is an explanatory diagram showing a second embodiment of the total protection method for the power system unit and the total protection device of the present invention.
In the second embodiment, the protection information network 5 formed between the control station 2 and the control station 2 is connected to the constant monitoring control point 6. The protection information network 5 and the constant monitoring control point 6 are controlled by a remote monitoring control function or a remote maintenance function. Furthermore, time can be synchronized with this protection information network 5 by GPS. As described above, the protection function can be calculated by synchronizing the information capturing at each electric station by means of synchronizing the time.
[0030]
The total protection method and the total protection device for each power system according to the present invention can be integrated with a protection function, a measurement function, a control function, or the like. Here, the “protection function” includes transmission line protection function, bus protection function, equipment overload detection function, frequency detection function, system stabilization function, step-out detection function, reclosing function, remote settling function or remote maintenance / remote maintenance There are diagnostic functions. Examples of the “measurement function” include a fault location function, an accident recording function, or a transformer overload monitoring function. Further, the “control function” includes a voltage prediction control function, a phase adjusting equipment control function, a remote monitoring control function, and the like. A device for converting the amount of alternating current electricity at the time of each station and at the time of occurrence of an accident can be shared in terms of hardware. Therefore, using the converted information, it is possible to construct a total protection method that rationally combines various functions necessary for an electric power company.
[0031]
The present invention is not limited to the embodiment of the invention described above, and may be a method of collecting information necessary for protecting an electric power station and a power transmission line in one place and collectively protecting the information using a common arithmetic processing unit or the like. For example, the present invention is not limited to the above-described configuration, and various modifications can be made without departing from the scope of the present invention.
[0032]
【The invention's effect】
In the total protection method for each power system of the present invention, the transmission line protection of the controlled station is unified to the representative end discrimination current differential system, and each line is connected by the arithmetic processing unit (1: N-type transmission line protection) of the control station. Protect all at once. Also, it is possible to conserve maintenance with a single protection method and remote maintenance function. Furthermore, the cut-off time can be increased.
[0033]
In the total protection device for each power system of the present invention, the number of controlled stations is limited to only information collection terminals, and it is not necessary to install a backup device using an existing digital relay, so that the equipment of the controlled stations can be reduced. By unifying (fixing) the interface between units, it is not necessary to replace a complete set of equipment in order to cope with the renewal of equipment, and it can be completed by exchanging the units, so that equipment costs can be reduced.
[0034]
On the other hand, in addition to the existing power transmission line protection function, there is an effect that the equipment can be slimmed down by integrating various functions such as a remote monitoring control function and a remote maintenance function.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a first embodiment of a total protection method and a total protection device for a power system according to the present invention.
FIG. 2 is an explanatory diagram showing an arrangement of an interconnection substation and a distribution substation.
FIG. 3 is an explanatory diagram showing a configuration example of an information terminal in a controlled station.
FIG. 4 is an explanatory diagram showing a second embodiment.
FIG. 5 is an explanatory diagram showing a protection method in a conventional substation.
FIG. 6 is an explanatory diagram showing a configuration example of a protection device in a conventional distribution substation.
[Explanation of symbols]
1 Controlled station (electricity station, distribution substation)
2 Control station (interconnected substation)
3 Arithmetic processor 4 Protection information network (control station and controlled station)
5 Protection information network (between control stations)

Claims (6)

発電所の電気が送電される変電所等の各電気所及び送電線に発生する事故等を監視し、その保護処置を行う電力系統単位のトータル保護方法であって、
配電用変電所のような被制御局(1)となる複数の電気所の保護に必要な情報を制御局(2)となる連系変電所に集中するように伝送するために、各被制御局(1)と制御局(2)との間に保護情報ネットワーク(4)を形成し、
更に、前記制御局(2)と制御局(2)との間にも保護情報ネットワーク(5)を形成し、
前記保護情報ネットワーク(5)に常時監視制御箇所(6)を接続して、遠隔監視制御又はリモートメンテナンス制御し、
前記制御局(2)における共通の演算処理装置(3)により、制御局(2)と被制御局(1)の間の送電線で発生する事故等を一括監視し、かつその送電線保護機能、母線保護機能等の「保護機能」、故障点標定機能又は事故記録機能等の「計測機能」、及び電圧予測制御機能又は調相設備制御機能等の「制御機能」に関する保護処置を一括行う、
ことを特徴とする電力系統単位のトータル保護方法。
It is a total protection method for each power system that monitors accidents, etc. occurring in each power station and transmission line such as a substation where electricity from the power station is transmitted, and performs protection measures,
In order to transmit information necessary for protection of a plurality of electric stations that are controlled stations (1) such as distribution substations to the connected substations that are controlled stations (2) , Forming a protection information network (4) between the control station (1) and the control station (2);
Furthermore, a protection information network (5) is formed between the control station (2) and the control station (2),
The monitoring information control point (6) is connected to the protection information network (5), and remote monitoring control or remote maintenance control is performed.
By the common processing unit (3) in the control station (2), collectively monitors the accidents that occur the control station (2) in the transmission line between the control station (1), and protects the transmission line function, "protection" such as busbar protection, "measurement function" such fault point locating function or accident recording function, and the protection process relating to "control functions", such as a voltage prediction control function or phase modifying equipment control function in batch Do,
A total protection method for each power system.
前記被制御局(1)から前記制御局(2)に対して、その保護処置に必要な情報を集中するように伝送し、
前記制御局(2)の演算処理装置(3)により、事故の生じた制御局(2)と被制御局(1)の間の送電線を選択し、
前記制御局(2)からの信号により、事故の生じた送電線に対して制御局(2)と前記被制御局(1)がその保護処置を行う、
ことを特徴とする請求項1の電力系統単位のトータル保護方法。
The control station (1) transmits to the control station (2) so as to concentrate information necessary for the protection measures ,
By the arithmetic processing unit (3) of the control station (2), the transmission line between the control station (2) where the accident occurred and the controlled station (1) is selected,
In response to a signal from the control station (2), the control station (2) and the controlled station (1) take protective measures for the transmission line in which an accident has occurred.
The total protection method for each electric power system according to claim 1 .
前記被制御局(1)と制御局(2)間の情報は、情報の発信元が判別できるように,固有のID番号を付して伝送する、ことを特徴とする請求項1の電力系統単位のトータル保護方法。2. The power system according to claim 1, wherein the information between the controlled station (1) and the control station (2) is transmitted with a unique ID number so that a source of the information can be identified. Unit total protection method. 発電所の電気が送電される変電所等の各電気所及び送電線に発生する事故等を監視し、その保護処置を行う電力系統単位のトータル保護装置であって、
配電用変電所のような複数の被制御局(1)から、連系変電所のような制御局(2)に保護に必要な情報を集中するように伝送するための保護情報ネットワーク(4)と、
前記制御局(2)と制御局(2)との間に形成された保護情報ネットワーク(5)に接続された、遠隔監視制御機能又はリモートメンテナンス機能により制御する常時監視制御箇所(6)と、
前記被制御局(1)において事故の生じた被制御局(1)又は送電線を選択するために前記制御局(2)に設けられた、ユニット単位でひとつの筐体に収納された演算処理装置(3)と、
前記制御局(2)からの信号により、事故の生じた被制御局(1)又は送電線を処置するために該被制御局(1)に設けられた遮断装置等の保護装置と、
を備えた、ことを特徴とする電力系統単位のトータル保護装置。
A total protection device for each power system that monitors accidents, etc. that occur in each power station and transmission line such as a substation where electricity from the power station is transmitted, and performs protection measures,
A protection information network (4) for concentrating and transmitting information necessary for protection from a plurality of controlled stations (1) such as distribution substations to a control station (2) such as a connected substation When,
A constant monitoring control point (6) connected to a protection information network (5) formed between the control station (2) and the control station (2) and controlled by a remote monitoring control function or a remote maintenance function;
Arithmetic processing housed in a single unit for each unit provided in the control station (2) for selecting the controlled station (1) or power transmission line in which the accident occurred in the controlled station (1) A device (3);
A protection device such as a shut-off device provided in the controlled station (1) or the controlled station (1) for treating the controlled station (1) in which an accident has occurred or a transmission line by a signal from the control station (2);
A total protection device for each electric power system, characterized by comprising:
前記演算処理装置(3)は、その不具合対応や保護装置をユニット単位で交換しえるように構成したものである、ことを特徴とする請求項4の電力系統単位のトータル保護装置。5. The total protection device for each electric power system according to claim 4 , wherein the arithmetic processing device (3) is configured to be able to replace the failure handling and protection device in units. 前記演算処理装置(3)は、装置故障時の保護信頼度を確保するために複数台設置した、ことを特徴とする請求項4又は5の電力系統単位のトータル保護装置。6. The total protection device according to claim 4 or 5 , wherein a plurality of the arithmetic processing devices (3) are installed in order to ensure protection reliability in the event of a device failure.
JP2002223961A 2002-07-31 2002-07-31 Total protection method for each power system and its total protection device Expired - Fee Related JP3886427B2 (en)

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