JP3411471B2 - Power system protection control system - Google Patents
Power system protection control systemInfo
- Publication number
- JP3411471B2 JP3411471B2 JP13505897A JP13505897A JP3411471B2 JP 3411471 B2 JP3411471 B2 JP 3411471B2 JP 13505897 A JP13505897 A JP 13505897A JP 13505897 A JP13505897 A JP 13505897A JP 3411471 B2 JP3411471 B2 JP 3411471B2
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- signal
- control
- unit
- monitoring
- 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.)
- Expired - Fee Related
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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Emergency Protection Circuit Devices (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】この発明は、遮断器のトリッ
プ制御のための制御信号部とトリップコイルにトリップ
信号を与えるため開閉制御部の間にある伝送線に断線監
視機構を備えた電力系統保護制御システムに関するもの
である。
【０００２】
【従来の技術】図８は、従来の電力系統保護制御システ
ムの一般的な構成図を示す。図において、１００は母
線、2 ００は前記母線１００から分岐している送電線、
3 ００は電力系統の電圧情報を後で説明する制御信号発
生部に取り込む測定用変圧器（以下ＰＴという）、４０
０は電力系統の電流情報を制御信号発生部に取り込む測
定用変流器（以下ＣＴという）、５００は前記母線1 ０
０から前記送電線２００を切り離し、または接続を行う
遮断器、６００は前記ＰＴ３００およびＣＴ４００から
母線の電力情報( 以下母線情報という) を得て電力系統
保護制御に必要な制御信号を作る制御信号発生部であ
る。また、６００１はＰＴ３００およびＣＴ４００から
得られる電力系統の母線情報を入力する入力部、６００
２は前記入力部６００１で得た電力系統の情報に基づき
電力系統の動作状態を評価し、母線１００と送電線２０
０の間の切り離しが必要かどうかの判定を行う演算部、
６００３は演算部６００２の判定結果に基づいて遮断器
５００に、母線１００と送電線２００の間の切り離し(
トリップ制御) のための制御信号を送出する出力部であ
る。７００は前記制御信号発生部６００からの制御信号
を受け、前記遮断器５００の開閉制御を行うトリップコ
イル７００１を含む開閉制御部である。
【０００３】次に動作について説明する。制御信号発生
部６００は、母線１００や送電線２００を含む電力系統
から時々刻々と変化する電力系統の母線情報を常時ＰＴ
３００やＣＴ４００を経て取り込み、電力系統に異常が
ないかを演算部６００２で判定する。異常があれば出力
部６００３から開閉制御部７００に向け、遮断機５のト
リップに必要な制御信号を送り、母線１００と送電線２
００の間の切り離しを行う。
【０００４】ところで、実際の各機器の配置において、
制御信号発生部６００と開閉制御部７００の間がかなり
離れている場合があり、その間に制御信号用の伝送線８
が配置されている。
【０００５】
【発明が解決しようとする課題】従来の電力系統保護制
御システムは以上のように構成されており、必要なとき
に確実に遮断器５００の開閉が行えるよう信頼性を高め
るため、部品点数の多い制御信号発生部６００および開
閉制御部７００には故障検知機能が設けられていた。
【０００６】前記制御信号発生部６００と前記開閉制御
部７００とが、離れて設置され伝送線８００を経て接続
されている場合、この伝送線は部品点数的には問題が少
ないが、途中で断線する恐れがあるので、伝送線を含む
回路の信頼性を確保できる措置を取っておく必要があ
る。
【０００７】この発明に係る電力系統保護制御システム
は、上記課題を解決するためになされたもので、伝送線
に適合した監視機能を備え、常時自動的に伝送線の断線
監視を行えるようにしたものである。
【０００８】【課題を解決するための手段】 この発明に係る電力系統
保護制御システムは、母線と送電線の間に設けられ、母
線と送電線間の接続の開閉を行う遮断器、前記遮断器の
開閉制御を行う開閉制御部、前記母線の電気情報を取り
込み、予め設定された条件に照らして異常状態を検出
し、前記遮断器を開閉制御する制御信号を出力する制御
信号部、前記制御信号部からの制御信号を前記開閉制御
部へ導く伝送線とを備えた電力系統保護制御システムに
おいて、前記制御信号部は、前記伝送線の断線の有無を
監視するための予め設定された電気量である監視信号を
送信インタフェースを経て前記伝送線に送り出す監視信
号部Ａを設け、前記開閉制御部は、前記伝送線を経て送
られてきた監視信号を受信インタフェースで抽出し、そ
の電気量を測定して前記予め設定された電気量と比較す
ることによって伝送線の断線の有無を判断する監視信号
部Ｂを設けたものである。
【０００９】
【００１０】
【００１１】
【００１２】
【００１３】
【００１４】
【発明の実施の形態】図１は、この発明のいくつかの実
施の形態に係る電力系統保護制御システムに共通する部
分の機能構成図である。図１において、１は母線、2 は
前記母線１から分岐している送電線、3 は電力系統の電
圧情報を後で説明する制御信号発生部に取り込む測定用
変圧器（以下ＰＴという）、４は電力系統の電流情報を
制御部に取り込む測定用変流器（以下ＣＴという）、５
は前記母線1 から前記送電線２を切り離し、または接続
を行う遮断器、６は制御信号部で、前記ＰＴ３およびＣ
Ｔ４から母線情報を得て電力系統保護制御に必要な制御
信号を作る制御信号発生部６１と、各実施の形態毎に説
明する構成の断線検知のための監視信号部Ａ６ｍより構
成されている。制御信号発生部６１は、ＰＴ３およびＣ
Ｔ４から得られる電力系統の母線情報を入力する入力部
６１１、前記入力部６１１１で得た電力系統の情報に基
づき予め設定された基準にしたがって電力系統の動作状
態を評価し、母線１と送電線２の間の切り離しが必要か
どうかの判定を行う演算部６１２、演算部６１２の判定
結果に基づいて遮断器５に、母線１と送電線２の間の切
り離し( トリップ制御) のための制御信号を送出する出
力部６１３より構成されている。７は開閉制御部で、前
記制御信号部６からの制御信号を受け、前記遮断機２の
開閉制御を行うトリップコイルを含むトリップ回路７１
と、各実施の形態毎に説明する構成の断線検知のための
監視信号部Ｂ７ｎより構成されている。トリップ回路７
１はトリップコイル７１１、補助リレー７１２、電源線
７１３より構成されている。また、８は制御信号部６か
ら開閉制御部７への伝送線である。実施の形態において
説明するように、伝送線のほかに補助の電流返送路が設
けられる場合がある。本発明は、このような電力系統保
護制御を行うものにおいて、伝送線８の断線監視機能の
構成に関するものである。
【００１５】実施の形態１．図２は、実施の形態１に適
用する伝送線８の断線監視のための信号の生成と評価を
行う部分の機能系統図である。図２において、図１と共
通する部分は図１と同じ符号を付している。６１は制御
信号発生部、６２は監視信号部Ａ、６２１は信号切り替
えスイッチ、６２２は送信インタフェース、６２３は電
流源、６２４は電流計、６３５は一致検出回路である。
また８は伝送線、８１は電流返送路である。７は開閉制
御装置、７１はトリップ回路、７２は監視信号部Ｂ、７
２１は受信インタフェース、７２２はスイッチである。
【００１６】次に動作を説明する。図１において制御信
号部６は、時々刻々と変化する電力系統の母線情報を常
時ＰＴ３やＣＴ４を経て取り込み、電力系統に異常がな
いかを演算部６１２で判定する。異常があれば出力部６
１３から監視制御部Ａ６２,伝送路８、監視制御部Ｂ７
２を経て開閉制御部７のトリップ回路７１に向け、遮断
器５のトリップに必要な制御信号を送り、母線１と送電
線２の間の切り離しを行う。
【００１７】つぎに、この伝送線の断線監視にかかる部
分について説明する。図２において、通電指令信号を受
けると、信号切り換えスイッチ６２１が開放され、監視
信号部Ａ６２の電流源６２３は予め設定された既知の電
流値を一点鎖線に示す経路を経て、送信インタフェース
６２２より伝送路８に向け送り込む。監視信号部Ｂ７２
の受信インタフェース７２１では、監視電流を抽出し
て、電流返送路８１を経て制御信号発生装置６の監視信
号部６２へ送り返す。監視信号部Ａ６２の電流計６２４
でその大きさを測定し、一致検出回路６２５で先に送り
込んだ監視信号の既知電流値と対比し、伝送線８の状態
が正常かどうか( 断線していないか) を判断する。
【００１８】実施の形態２．実施の形態２は、伝送線の
監視のための信号の生成と評価を行う部分の構成を除
き、実施の形態１と同じ構成になっている。実施の形態
２は、実施の形態１の伝送線の監視のための信号の生成
と評価を行う部分の機能系統図を図２に代えて図３のも
のを適用する。実施の形態２の伝送線の監視のための信
号の生成と評価を行う部分の機能系統図を図３に示す。
図３において、６は制御信号部、６１は制御信号発生
部、６３は監視信号部Ａ、７は開閉制御部、７１はトリ
ップ回路、７３監視信号部Ｂである。制御信号発生部６
１とトリップ回路７１は実施の形態２と同じ構成であ
る。実施の形態１の構成からスイッチ６２１が省かれて
いることを除き実施の形態２のそれと同じ構成になって
いる。
【００１９】次に動作について説明する。実施の形態１
と相違しているところは、制御信号源を切り離さずに監
視信号を乗せている点である。制御信号が印可されてい
ない状況下では伝送路には一点鎖線で示す経路を経て監
視信号のみが通り、実施の形態１と同様に監視信号のみ
が帰ってくるので、正しい評価ができる。
【００２０】実施の形態３．実施の形態３は、伝送線の
監視のための信号の生成と評価を行う部分の構成を除
き、実施の形態１と同じ構成になっている。実施の形態
３は、実施の形態１の伝送線の監視のための信号の生成
と評価を行う部分の機能系統図を図２に代えて図４のも
の適用する。図４において、６は制御信号部、６１は制
御信号発生部、６４は監視信号部Ａ、７は開閉制御装
置、７１は開閉制御部、７４は監視信号部Ｂである。実
施の形態１との違いは、実施の形態３では信号監視部Ａ
６４からの監視信号は信号監視部Ｂ７４で抽出され、こ
こで既知の電流値と比較する構成となっている点であ
る。帰線を用いて戻すということをしないので、帰線用
の配線が不要である。
【００２１】次に動作について説明する。通電指令が行
われると電流源６４２が既知の電流値に設定され監視信
号部Ａ６４から一点鎖線で示す経路を経て通電が行われ
る。この電流は監視信号部Ｂ７４で抽出され、既知の電
流と一致検出回路７４３で比較され断線の有無を判断す
る。
【００２２】実施の形態４．実施の形態４は、伝送線の
監視のための信号の生成と評価を行う部分の構成を除
き、実施の形態１と同じ構成になっている。従って説明
はこの部分のみ行う。実施の形態４は、実施の形態１の
伝送線の監視のための信号の生成と評価を行う部分の機
能系統図を図２に換えて図５のものを適用する。図５に
おいて、６は制御信号部、６１は制御信号発生部、６５
は監視信号部Ａ、６５１は第１の送信インタフェース
部、６５２は第２の送信インタフェース部、７は開閉制
御装置、７１は開閉制御部、７５は監視信号部Ｂ、７５
１は第１の受信インタフェース部、７５２は第２の受信
インタフェース部、７５３は２重化一致検出回路、８３
は第１の伝送線、８４は第２の伝送線である。
【００２３】次に動作について説明する。通電指令に基
づいて監視信号部Ａ６５の電流源から既知の電流値を２
つの伝送路を経て送り出す。監視信号部Ｂ７５では、２
つの伝送線を経て到着する電流を抽出し、両者の電流値
を比較して断線の有無を判定する。
【００２４】実施の形態５．実施の形態５は、伝送線の
監視のための信号の生成と評価を行う部分の構成を除
き、実施の形態１と同じ構成になっている。従って説明
はこの部分のみ行う。実施の形態４は、実施の形態１の
伝送線の監視のための信号の生成と評価を行う部分の機
能系統図を図２に換えて図６のものを適用する。図６に
おいて、６は制御信号部、６１は制御信号発生部、６６
は監視信号部Ａ、６６１はエンコーダ、６６２は第１の
送信インタフェース部、７は開閉制御装置、７１は開閉
制御部、７６は監視信号部Ｂ、７６１は受信インタフェ
ース部、７６２はデコーダ、８は伝送線である。
【００２５】次に動作について説明する。監視信号部Ａ
６６からは、トリップ信号有りかトリップ信号なしかに
対応し、図７に示すような２種類の周期の違うデータ信
号を監視信号部Ｂ７６に送る。監視信号部Ｂ７６のデコ
ーダ７６２では、データ信号の到来の有無と、到来した
データ信号をデコードして、トリップ信号有りの信号
か、トリップ信号無しの信号かの監視を行なう。これら
の監視によって、トリップ信号の有無と共に、伝送線の
断線の有無を検出できる。
【００２６】
【発明の効果】以上のように、この発明によれば、母線
と送電線の間に設けられ、母線と送電線間の接続の開閉
を行う遮断器、遮断器の開閉制御を行う開閉制御部、母
線の電気情報を取り込み、予め設定された条件に照らし
て異常状態を検出し、遮断器を開閉制御する制御信号を
出力する制御信号部、制御信号部からの制御信号を開閉
制御部へ導く伝送線とを備えた電力系統保護制御システ
ムにおいて、制御信号部は、伝送線の断線の有無を監視
するための予め設定された電気量である監視信号を送信
インタフェースを経て伝送線に送り出す監視信号部Ａを
設け、開閉制御部は、伝送線を経て送られてきた監視信
号を受信インタフェースで抽出し、その電気量を測定し
て予め設定された電気量と比較することによって伝送線
の断線の有無を判断する監視信号部Ｂを設けたので、監
視信号部Ｂで測定した電気量を帰線（電流値返送路）を
用いて監視信号部Ａに戻す必要がなく、帰線用の配線が
不要であり、簡単な構成で伝送線の断線の有無を検出で
きる。 Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission line between a control signal section for trip control of a circuit breaker and a switching control section for supplying a trip signal to a trip coil. And a power system protection control system including a disconnection monitoring mechanism. FIG. 8 shows a general configuration of a conventional power system protection control system. In the figure, 100 is a bus, 200 is a transmission line branched from the bus 100,
Reference numeral 300 denotes a measuring transformer (hereinafter, referred to as PT) which takes in the voltage information of the power system into a control signal generator described later.
Numeral 0 denotes a current transformer for measurement (hereinafter referred to as CT) for taking current information of the power system into the control signal generator, and 500 denotes the bus 10
A circuit breaker 600 for disconnecting or connecting the transmission line 200 from 0. A control signal generator 600 obtains bus power information (hereinafter referred to as bus information) from the PT 300 and CT 400 and generates a control signal necessary for power system protection control. Department. Reference numeral 6001 denotes an input unit for inputting bus information of the power system obtained from the PT 300 and the CT 400;
2 evaluates the operation state of the power system based on the information of the power system obtained by the input unit 6001, and
An operation unit for determining whether separation between 0 is necessary,
Reference numeral 6003 indicates to the circuit breaker 500 based on the determination result of the calculation unit 6002 that the busbar 100 and the power transmission line 200 are disconnected (
This is an output unit for sending a control signal for trip control. Reference numeral 700 denotes an opening / closing control unit including a trip coil 7001 that receives a control signal from the control signal generation unit 600 and controls opening / closing of the circuit breaker 500. Next, the operation will be described. The control signal generation unit 600 always transmits the bus information of the power system that changes every moment from the power system including the bus 100 and the transmission line 200 to the PT.
The data is captured via the 300 or the CT 400, and the arithmetic unit 6002 determines whether there is any abnormality in the power system. If there is any abnormality, a control signal necessary for tripping the circuit breaker 5 is sent from the output unit 6003 to the switching control unit 700, and the bus 100 and the transmission line 2
Separate during 00. By the way, in the actual arrangement of each device,
In some cases, the control signal generator 600 and the opening / closing controller 700 are far apart from each other.
Is arranged. [0005] The conventional power system protection and control system is configured as described above. In order to improve the reliability so that the circuit breaker 500 can be reliably opened and closed when necessary, components are provided. The control signal generating section 600 and the opening / closing control section 700 having a large number of points had a failure detection function. When the control signal generator 600 and the open / close controller 700 are installed separately from each other and connected via a transmission line 800, this transmission line has few problems in terms of the number of parts, but is disconnected in the middle. Therefore, it is necessary to take measures to ensure the reliability of the circuit including the transmission line. [0007] electric power system protective control system according to the present invention has been made to solve the above problems, a monitoring function adapted to transfer transmission line, to allow disconnection monitoring at all times automatically transmission line Ru der those. [0008] [Means for Solving the Problems] power system according to the present invention
The protection control system is installed between the bus and the
Circuit breaker that opens and closes the connection between the line and the transmission line;
An opening / closing control unit that performs opening / closing control, and acquires electrical information of the bus.
To detect abnormal conditions based on preset conditions
And outputting a control signal for controlling the opening and closing of the circuit breaker.
Signal unit, the control signal from the control signal unit to control the opening and closing
Power system protection and control system with a transmission line leading to the
The control signal unit determines whether the transmission line is disconnected.
A monitoring signal that is a preset amount of electricity for monitoring
A supervisory signal sent to the transmission line via a transmission interface
No. A is provided, and the opening / closing control unit transmits the data via the transmission line.
The received monitoring signal is extracted by the receiving interface, and
Is measured and compared with the preset amount of electricity.
Monitoring signal to determine the presence or absence of transmission line disconnection
A section B is provided. FIG. 1 is a block diagram of a part common to a power system protection control system according to some embodiments of the present invention. It is a functional block diagram. In FIG. 1, 1 is a bus, 2 is a power transmission line branched from the bus 1, 3 is a measuring transformer (hereinafter referred to as PT) which takes in voltage information of the power system into a control signal generator described later, 4 Are current transformers (hereinafter referred to as CT) for taking current information of the power system into the control unit;
Is a circuit breaker for disconnecting or connecting the transmission line 2 from the bus 1, and 6 is a control signal unit,
It comprises a control signal generator 61 that obtains bus information from T4 and generates a control signal necessary for power system protection control, and a monitoring signal unit A6m for disconnection detection having a configuration described in each embodiment. The control signal generator 61 is provided with the PT3 and C
An input unit 611 for inputting bus information of the power system obtained from T4, an operation state of the power system is evaluated according to a preset standard based on the information of the power system obtained by the input unit 6111, and the bus 1 and the transmission line are evaluated. And a control signal for disconnecting (trip control) between the bus 1 and the transmission line 2 to the circuit breaker 5 based on the determination result of the computing unit 612. From the output unit 613 for sending out. Reference numeral 7 denotes an open / close control unit which receives a control signal from the control signal unit 6 and includes a trip circuit 71 including a trip coil for performing open / close control of the circuit breaker 2.
And a monitoring signal section B7n for disconnection detection having a configuration described in each embodiment. Trip circuit 7
1 includes a trip coil 711, an auxiliary relay 712, and a power supply line 713. Reference numeral 8 denotes a transmission line from the control signal unit 6 to the switching control unit 7. As described in the embodiment, an auxiliary current return path may be provided in addition to the transmission line. The present invention relates to a configuration for performing a disconnection monitoring function of the transmission line 8 in performing such power system protection control. Embodiment 1 FIG. 2 is a functional system diagram of a portion that generates and evaluates a signal for monitoring disconnection of the transmission line 8 applied to the first embodiment. In FIG. 2, parts common to FIG. 1 are denoted by the same reference numerals as in FIG. 61 is a control signal generation unit, 62 is a monitoring signal unit A, 621 is a signal changeover switch, 622 is a transmission interface, 623 is a current source, 624 is an ammeter, and 635 is a coincidence detection circuit.
8 is a transmission line, and 81 is a current return path. 7 is an opening / closing control device, 71 is a trip circuit, 72 is a monitoring signal unit B, 7
21 is a receiving interface, and 722 is a switch. Next, the operation will be described. In FIG. 1, the control signal unit 6 always takes in the bus information of the power system that changes every moment via the PT3 and CT4, and determines whether or not there is any abnormality in the power system by the calculation unit 612. Output unit 6 if abnormal
13 to the supervisory control unit A62, the transmission line 8, the supervisory control unit B7
The control signal necessary for tripping the circuit breaker 5 is sent to the trip circuit 71 of the switching control unit 7 through the line 2 to disconnect the bus 1 and the transmission line 2. Next, a portion related to the monitoring of the disconnection of the transmission line will be described. In FIG. 2, upon receiving the energization command signal, the signal changeover switch 621 is opened, and the current source 623 of the monitoring signal unit A62 transmits a preset known current value from the transmission interface 622 via a path indicated by a dashed line. Send it to Road 8. Monitoring signal section B72
The receiving interface 721 extracts the monitoring current and sends it back to the monitoring signal unit 62 of the control signal generator 6 via the current return path 81. Ammeter 624 of monitoring signal part A62
Then, the magnitude of the transmission line 8 is measured, and the coincidence detection circuit 625 compares the magnitude with the known current value of the monitoring signal sent earlier to determine whether or not the state of the transmission line 8 is normal (whether or not there is a disconnection). Embodiment 2 FIG. The second embodiment has the same configuration as that of the first embodiment, except for the configuration of a portion for generating and evaluating a signal for monitoring a transmission line. In the second embodiment, FIG. 3 is applied in place of FIG. 2 for a functional system diagram of a portion for generating and evaluating a signal for monitoring a transmission line in the first embodiment. FIG. 3 shows a functional system diagram of a portion for generating and evaluating a signal for monitoring a transmission line according to the second embodiment.
In FIG. 3, 6 is a control signal section, 61 is a control signal generation section, 63 is a monitoring signal section A, 7 is an open / close control section, 71 is a trip circuit, and 73 is a monitoring signal section B. Control signal generator 6
1 and the trip circuit 71 have the same configuration as in the second embodiment. The configuration is the same as that of the second embodiment except that the switch 621 is omitted from the configuration of the first embodiment. Next, the operation will be described. Embodiment 1
The difference is that the monitoring signal is carried without disconnecting the control signal source. In a situation where no control signal is applied, only the supervisory signal passes through the transmission path via a path shown by a dashed line, and only the supervisory signal returns as in the first embodiment, so that correct evaluation can be performed. Embodiment 3 The third embodiment has the same configuration as that of the first embodiment except for the configuration of a portion for generating and evaluating a signal for monitoring a transmission line. In the third embodiment, the functional system diagram of the portion for generating and evaluating the signal for monitoring the transmission line of the first embodiment shown in FIG. 4 instead of FIG. 2 is applied. 4, reference numeral 6 denotes a control signal unit, 61 denotes a control signal generation unit, 64 denotes a monitoring signal unit A, 7 denotes an open / close control device, 71 denotes an open / close control unit, and 74 denotes a monitor signal unit B. The difference from the first embodiment is that in the third embodiment, the signal monitoring unit A
The monitoring signal from 64 is extracted by the signal monitoring unit B74, and is compared with a known current value here. Since the return is not performed using the return line, the return line wiring is unnecessary. Next, the operation will be described. When the energization command is issued, the current source 642 is set to a known current value, and energization is performed from the monitoring signal unit A64 via a path indicated by a dashed line. This current is extracted by the monitoring signal unit B74, and is compared with a known current by the coincidence detection circuit 743 to determine whether there is a disconnection. Embodiment 4 The fourth embodiment has the same configuration as that of the first embodiment except for the configuration of a portion for generating and evaluating a signal for monitoring a transmission line. Therefore, only this part will be described. In the fourth embodiment, FIG. 5 is applied instead of the functional system diagram of the portion for generating and evaluating the signal for monitoring the transmission line of the first embodiment shown in FIG. In FIG. 5, 6 is a control signal section, 61 is a control signal generation section, and 65 is a control signal generation section.
Is a monitoring signal unit A, 651 is a first transmission interface unit, 652 is a second transmission interface unit, 7 is an opening / closing control device, 71 is an opening / closing control unit, and 75 is a monitoring signal unit B, 75
1 is a first reception interface unit, 752 is a second reception interface unit, 753 is a duplicate coincidence detection circuit, 83
Is a first transmission line, and 84 is a second transmission line. Next, the operation will be described. A known current value from the current source of the monitoring signal unit A65 is changed to 2 based on the energization command.
Out via two transmission lines. In the monitoring signal section B75, 2
The current arriving via the two transmission lines is extracted, and the current values of the two are compared to determine whether there is a disconnection. Embodiment 5 The fifth embodiment has the same configuration as that of the first embodiment, except for the configuration of a portion for generating and evaluating a signal for monitoring a transmission line. Therefore, only this part will be described. In the fourth embodiment, FIG. 6 is applied instead of the functional system diagram of the portion for generating and evaluating the signal for monitoring the transmission line of the first embodiment, which is shown in FIG. 6, reference numeral 6 denotes a control signal unit, 61 denotes a control signal generator, and 66 denotes a control signal generator.
Is a monitoring signal unit A, 661 is an encoder, 662 is a first transmission interface unit, 7 is an opening / closing control device, 71 is an opening / closing control unit, 76 is a monitoring signal unit B, 761 is a receiving interface unit, 762 is a decoder, and 8 is a decoder. It is a transmission line. Next, the operation will be described. Monitoring signal section A
From 66, two types of data signals having different periods as shown in FIG. 7 are sent to the monitoring signal section B76, depending on whether there is a trip signal or no trip signal. The decoder 762 of the monitoring signal section B76 monitors whether a data signal has arrived, decodes the incoming data signal, and monitors whether the signal has a trip signal or not. By these monitoring, the presence / absence of the trip signal and the presence / absence of the disconnection of the transmission line can be detected. As described above, according to the present invention, the bus
Between the power line and the transmission line to open and close the connection between the bus and the transmission line
Circuit breaker, switching control unit that controls the opening and closing of the circuit breaker, mother
Captures electrical information of wires and compares them to preset conditions
To detect an abnormal condition and send a control signal to control the opening and closing of the circuit breaker.
Control signal section to output, open / close control signal from control signal section
Power system protection control system with transmission line leading to control unit
In the system, the control signal part monitors whether the transmission line is disconnected.
A monitoring signal that is a preset amount of electricity
The monitoring signal section A sent out to the transmission line via the interface
The opening / closing control unit provides the monitoring signal sent via the transmission line.
Signal at the receiving interface, and measure the amount of electricity
Transmission line by comparing it with a preset amount of electricity.
Monitoring signal section B for determining the presence or absence of disconnection
The return of the quantity of electricity measured by the visual signal unit B (current value return path)
It is not necessary to return to the monitoring signal section A by using
It is unnecessary and can detect the presence of disconnection of the transmission line with a simple configuration.
Wear.
【図面の簡単な説明】
【図１】 この発明に係る電力系統保護制御システムの
機能構成図である。
【図２】 この発明の実施の形態１に係る伝送線の監視
のための信号の生成と評価を行う部分の機能系統図であ
る。
【図３】 この発明の実施の形態２に係る伝送線の監視
のための信号の生成と評価を行う部分の機能系統図であ
る。
【図４】 この発明の実施の形態３に係る伝送線の監視
のための信号の生成と評価を行う部分の機能系統図であ
る。
【図５】 この発明の実施の形態４に係る伝送線の監視
のための信号の生成と評価を行う部分の機能系統図であ
る。
【図６】 この発明の実施の形態５に係る伝送線の監視
のための信号の生成と評価を行う部分の機能系統図であ
る。
【図７】 この発明の実施の形態５の信号の内容を説明
する図である。
【図８】 従来の電力系統保護制御システムの機能構成
を示す図である。
【符号の説明】
１ 母線、 ２ 送電線、 ３ 測定用変圧器、４ 測
定用変流器、 ５ 遮断器、６ 制御信号部、 ６
１ 制御信号発生部Ａ、６１１ 入力部、 ６１２
演算部、 ６１３ 出力部、６２ 監視信号部
Ａ、 ６３ 監視信号部Ａ、６４ 監視信号部Ａ、
６５ 監視信号部Ａ、６６ 監視信号部Ａ、７
開閉制御部、 ７１ トリップ回路、７２ 監視
信号部Ｂ、 ７３ 監視信号部Ｂ、７４ 監視信号
部Ｂ、 ７５ 監視信号部Ｂ、７６ 監視信号部
Ｂ、８ 伝送線、 ８１ 電流返送線、 ８２
補助伝送線。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a functional configuration diagram of a power system protection control system according to the present invention. FIG. 2 is a functional system diagram of a part for generating and evaluating a signal for monitoring a transmission line according to the first embodiment of the present invention. FIG. 3 is a functional system diagram of a portion that generates and evaluates a signal for monitoring a transmission line according to a second embodiment of the present invention. FIG. 4 is a functional system diagram of a part for generating and evaluating a signal for monitoring a transmission line according to a third embodiment of the present invention. FIG. 5 is a functional system diagram of a part for generating and evaluating a signal for monitoring a transmission line according to a fourth embodiment of the present invention. FIG. 6 is a functional system diagram of a part for generating and evaluating a signal for monitoring a transmission line according to a fifth embodiment of the present invention. FIG. 7 is a diagram illustrating the contents of a signal according to a fifth embodiment of the present invention. FIG. 8 is a diagram showing a functional configuration of a conventional power system protection control system. [Description of Signs] 1 busbar, 2 transmission line, 3 measurement transformer, 4 current transformer, 5 breaker, 6 control signal section, 6
1 control signal generator A, 611 input unit, 612
Calculation section, 613 output section, 62 monitoring signal section A, 63 monitoring signal section A, 64 monitoring signal section A,
65 monitoring signal section A, 66 monitoring signal section A, 7
Opening / closing control section, 71 Trip circuit, 72 Monitoring signal section B, 73 Monitoring signal section B, 74 Monitoring signal section B, 75 Monitoring signal section B, 76 Monitoring signal section B, 8 Transmission line, 81 Current return line, 82
Auxiliary transmission line.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平８−19195（ＪＰ，Ａ) 特開 昭58−83519（ＪＰ，Ａ) 特開 昭61−232733（ＪＰ，Ａ) 特開 昭55−74314（ＪＰ，Ａ) 特開 昭63−308580（ＪＰ，Ａ) 実開 昭60−156465（ＪＰ，Ｕ) 実開 昭58−75441（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02H 3/05 G01R 31/02 H02J 13/00 - 13/00 311 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-19195 (JP, A) JP-A-58-83519 (JP, A) JP-A-61-232733 (JP, A) JP-A-55-1983 74314 (JP, A) JP-A-63-308580 (JP, A) JP-A-60-156465 (JP, U) JP-A-58-75441 (JP, U) (58) Fields investigated (Int. 7 , DB name) H02H 3/05 G01R 31/02 H02J 13/00-13/00 311
Claims (1)
電線間の接続の開閉を行う遮断器、前記遮断器の開閉制
御を行う開閉制御部、前記母線の電気情報を取り込み、
予め設定された条件に照らして異常状態を検出し、前記
遮断器を開閉制御する制御信号を出力する制御信号部、
前記制御信号部からの制御信号を前記開閉制御部へ導く
伝送線とを備えた電力系統保護制御システムにおいて、 前記制御信号部は、前記伝送線の断線の有無を監視する
ための予め設定された電気量である監視信号を送信イン
タフェースを経て前記伝送線に送り出す監視信号部Ａを
設け、 前記開閉制御部は、前記伝送線を経て送られてきた監視
信号を受信インタフェースで抽出し、その電気量を測定
して前記予め設定された電気量と比較することによって
伝送線の断線の有無を判断する監視信号部Ｂを設けたこ
とを特徴とする電力系統保護制御システム。 (57) [Claims 1] Provided between a bus and a transmission line,
Circuit breaker for opening and closing connections between electric wires, opening and closing control of the circuit breaker
Opening / closing control unit for controlling, taking in the electrical information of the bus,
Detect an abnormal state in light of the preset conditions,
A control signal section for outputting a control signal for controlling the opening and closing of the circuit breaker,
Guides a control signal from the control signal unit to the open / close control unit
In the power system protection control system including the transmission line, the control signal unit monitors whether or not the transmission line is disconnected.
A monitoring signal, which is a preset amount of electricity for
The monitoring signal part A sent to the transmission line through the interface
The opening / closing control unit is provided with a monitor that is sent through the transmission line.
Extract the signal at the receiving interface and measure the amount of electricity
And comparing it with the preset amount of electricity
A monitoring signal section B for judging whether or not the transmission line is disconnected
And a power system protection and control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13505897A JP3411471B2 (en) | 1997-05-26 | 1997-05-26 | Power system protection control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13505897A JP3411471B2 (en) | 1997-05-26 | 1997-05-26 | Power system protection control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10327528A JPH10327528A (en) | 1998-12-08 |
| JP3411471B2 true JP3411471B2 (en) | 2003-06-03 |
Family
ID=15142920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13505897A Expired - Fee Related JP3411471B2 (en) | 1997-05-26 | 1997-05-26 | Power system protection control system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3411471B2 (en) |
-
1997
- 1997-05-26 JP JP13505897A patent/JP3411471B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10327528A (en) | 1998-12-08 |
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