JPH0378422A - Detecting device for operation of circuit breaker and switch - Google Patents
Detecting device for operation of circuit breaker and switchInfo
- Publication number
- JPH0378422A JPH0378422A JP1211666A JP21166689A JPH0378422A JP H0378422 A JPH0378422 A JP H0378422A JP 1211666 A JP1211666 A JP 1211666A JP 21166689 A JP21166689 A JP 21166689A JP H0378422 A JPH0378422 A JP H0378422A
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- waveform
- sequence
- current
- switch
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- 238000010586 diagram Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 1
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Abstract
Description
この発明は配電線上のしゃ断器や開閉器が動作した時に
発生する零相電流、零相電圧の波形を検出することによ
りしゃ断器、開閉器の動作を検出するしゃ断器、開閉器
の動作を検出装置に関するものである。This invention detects the operation of a breaker or switch by detecting the waveforms of zero-sequence current and zero-sequence voltage that occur when a breaker or switch on a distribution line operates. It is related to the device.
第７図はこの発明を適用し得る従来の故障検出を行うよ
うにした配電系統を示すブロック図であり、図において
、１は配電用変電所に設けられた主変圧器、２は主変圧
器１から出力される電力が供給される母線、Ｌ１〜Ｌ１
は母線２を介して上記電力の供給を受ける配電線、ＧＰ
Ｔは母線２に接続された接地用変圧器、０■Ｇは接地用
変圧器ＧＰＴから得られる零相電圧ｖ０により動作され
る地絡過電圧リレーである。
ＣＢ、−ＣＢ、ｌは配電線り、−Ｌ、に設けられたしゃ
断器、ＣＴ、、−ＣＴ、、は配電線り、−Ｌ。
に設けられた変流器、Ｓ、〜Ｓ１は変流器ＣＴ −ｒ〜
ＣＴ、、を流れる電流により動作される過電流すレー
ＺＣＴ、〜ＺＣＴ、は配電線り、−Ｌ、に設けられた零
相変流器、Ｇ、−Ｇ、は上記零相変流器ＺＣＴ、〜ＺＣ
Ｔ、を流れる零相電流と上記零相電圧■。とにより動作
される地絡方向リレーＳＳ＋＋〜Ｓ Ｓ 、、ｔ、
Ｓ Ｓ ＋□〜ＳＳ、、、は配電線り、〜Ｌ７の所定区
間毎に設けられた区分開閉器である。
第８図は上記しゃ断器ＣＢ ｒ〜Ｃ括７を動作させる駆
動回路を示すブロック図であり、図において、ＡＮＤ、
〜ＡＮＤ、は、一方の入力端子に上記地絡過電圧リレー
０■Ｇの動作時に得られるＯＶＧ動作信号が加えられる
と共に、他方の入力端子に上記地絡方向リレーＧ、−Ｇ
、の動作時に得られるＧｌ動作信号〜Ｇ７動作信号がそ
れぞれ加えられるアンドゲート、Ｔ、−Ｔ、はアンドゲ
ートＡＮＤ、−ＡＮＤ、１の出力で駆動されて、しゃ断
器ＣＢ、−ＣＢ、八一定時間後へＣＢｌ トリップ信号
〜ＣＢ、、トリップ信号を出力するタイマー回路である
。
次に動作について説明する。各配電線Ｌ Ｉ””’ Ｌ
−には、母線２を介して配電用変電所の主変圧器１よ
り電力が供給され、この電力はしゃ断器ＣＢ。
〜ＣＢ、を通じて各配電線Ｌ１〜Ｌｎの区分開閉器Ｓ
Ｓｚ””Ｓ ５ｆｉＩ、 Ｓ Ｓ＋□〜ＳＳ、１□で
区分される各区間に接続された負荷に供給される。この
状態において、例えば、配電線Ｌ 、において地絡事故
が生じたとする。これにより、接地用変圧器ＧＰＴに接
続された限流抵抗器より零相電圧■。が得られ、このた
め地絡過電圧リレーＯｖＧが動作して、０■Ｇ動作信号
が出力される。これと共に、例えば零相変流器ＺＣＴＩ
からの零相電流により地絡方向ワレ−Ｇ、が動作し、Ｇ
、動作信号が出力される。上記ＯＶＧ動作信号及びＧ、
動作信号は、第８図のアンドゲートＡＮＤ、に加えられ
、そのアンド出力によりタイマー回路Ｔ１が動作されて
、ＣＢｌ トリップ信号が出力される。このＣＢ、）リ
ップ信号はしゃ断器ＣＢ、に送られ、これによってしゃ
断器ＣＢ、が動作して、配電線り、が母線２から切り離
される。
なお、このような配電系統においてはしゃ断器ＣＢ、〜
ＣＢ、の動作は、配電用変電所に設けられた遠方監視制
御装置により監視されていた。また、区分開閉器Ｓ Ｓ
ｚ”Ｓ Ｓｆｉ＋、 Ｓ Ｓ ＋ｚ−３Ｓ、、２の
動作は、開閉器制御システムが導入されている箇所では
、このシステムにより遠隔監視することが出来る。開閉
器制御システムは、各区分開閉器毎に設けられた開閉器
制御用子局と営業所に設けられた親局とを、通信線路、
配電線搬送器等の伝送路で接続し、これ等の開閉器を親
局から遠隔監視制御するようにした構成となっている。FIG. 7 is a block diagram showing a conventional power distribution system that performs fault detection to which the present invention can be applied. In the figure, 1 is a main transformer installed in a distribution substation; 2 is a main transformer Bus line L1 to L1 to which power output from 1 is supplied
is a distribution line that receives the above power via bus 2, GP
T is a grounding transformer connected to the bus 2, and 0.times.G is a ground fault overvoltage relay operated by the zero-phase voltage v0 obtained from the grounding transformer GPT. CB, -CB, l are power distribution lines, -L are circuit breakers, CT, , -CT,, are power distribution lines, -L. The current transformers S and ~S1 provided in the current transformers CT-r~
Overcurrent speed operated by current flowing through CT,
ZCT, ~ZCT, are the zero-phase current transformers installed on the distribution line -L, and G, -G are the zero-phase current transformers ZCT, ~ZC.
The zero-sequence current flowing through T and the zero-sequence voltage above. Ground fault direction relays SS++~S S ,, t, operated by
S S +□~SS,,, are section switches provided for each predetermined section of the power distribution line ~L7. FIG. 8 is a block diagram showing a drive circuit for operating the circuit breaker CB r to C block 7, and in the figure, AND,
~AND, the OVG operation signal obtained when the above-mentioned ground fault overvoltage relay 0■G is operated is applied to one input terminal, and the above-mentioned ground fault direction relays G, -G are applied to the other input terminal.
, to which the Gl operation signal to G7 operation signal obtained during the operation of , are applied, respectively, are driven by the output of the AND gates AND, -AND, 1, and the circuit breakers CB, -CB, 81 are driven by the output of the AND gates AND, -AND, 1. This is a timer circuit that outputs a trip signal CBl trip signal ~CB after a fixed time. Next, the operation will be explained. Each distribution line L I""' L
- is supplied with power from the main transformer 1 of the distribution substation via the bus 2, and this power is supplied to the circuit breaker CB. ~CB, through the section switch S of each distribution line L1~Ln
Sz""S 5fiI, SS S+□ to SS, 1□ are supplied to the loads connected to each section. In this state, it is assumed that, for example, a ground fault occurs in the distribution line L. As a result, the zero-sequence voltage ■ from the current limiting resistor connected to the grounding transformer GPT. is obtained, and therefore the ground fault overvoltage relay OvG operates and a 0■G operation signal is output. Along with this, for example, a zero-phase current transformer ZCTI
The ground fault direction crackle G operates due to the zero-sequence current from G.
, an operation signal is output. The above OVG operation signal and G,
The operation signal is applied to the AND gate AND in FIG. 8, and the AND output operates the timer circuit T1 to output the CBl trip signal. This rip signal CB,) is sent to the breaker CB, which operates to disconnect the distribution line from the bus 2. In addition, in such a distribution system, circuit breakers CB, ~
The operation of the CB was monitored by a remote monitoring and control device installed at the distribution substation. In addition, section switch S S
The operation of z"S Sfi+, S S +z-3S,, 2 can be remotely monitored by this system at locations where a switch control system is installed. A communication line,
The configuration is such that the switches are connected via a transmission line such as a distribution line carrier, and these switches are remotely monitored and controlled from a master station.
【発明が解決しようとする課題１
従来の配電系統は以上のように構成されているので、こ
の配電系統に、例えば、地絡、短絡等の故障子知システ
ムを導入する場合は、次のような問題点があった。即ち
、この故障子知システムでは、地絡、短絡等の故障時に
発生する電流、電圧の特異波形データを予め登録して置
き、この登録データと常時検出される電流、電圧の波形
データとを照合し、両者が一致したとき、故障子知信号
を出力するように成されるが、その際、しゃ断器ＣＢ、
〜ＣＢ、あるいは区分開閉器Ｓ Ｓ ＋＋””Ｓ Ｓ
ｎ＋。
ＳＳＩ！〜ＳＳ７□等が動作した時、例えば工事等のた
めに現場で手動により区分開閉器を操作した時等の様に
配電線故障時以外に、発生する電流、電圧の波形が、登
録データの特異波形と誤って判断されてしまうと、故障
子知信号が誤って出力されることになるという問題点が
あった。
この発明は上記のような問題点を解消するために成され
たもので、しゃ断器及び開閉器の少なくとも一方が動作
した時に発生する零相電流、零相電圧の波形の特徴を検
出するしゃ断器、開閉器の動作検出装置を得ることを目
的とする。
【課題を解決するための手段】
この発明に係るしゃ断器、開閉器の動作検出装置は、配
電線に設けられた零相電流検出器及び零相電圧検出器に
よりそれぞれ検出された零相電流。
零相電圧の入力波形解析データと、しゃ断器、開閉器が
動作した時の予め登録された零相電流、零相電圧の波形
解析データとを照合し、所定の条件を満足したとき、動
作検出信号を出力するようにしたものである。[Problem to be Solved by the Invention 1] Since the conventional power distribution system is configured as described above, when introducing a fault detection system for ground faults, short circuits, etc. to this power distribution system, the following steps should be taken. There was a problem. In other words, in this fault detection system, unique current and voltage waveform data that occurs during failures such as ground faults and short circuits is registered in advance, and this registered data is compared with constantly detected current and voltage waveform data. When the two match, a fault detection signal is output. At this time, the circuit breaker CB,
~CB, or section switch S S ++””S S
n+. SSI! ~When SS7□ etc. is operated, for example, when a sectional switch is operated manually on site for construction work, etc., the current and voltage waveforms generated are not unique to the registered data. If the waveform is incorrectly determined, there is a problem in that a fault detection signal will be incorrectly output. This invention was made to solve the above-mentioned problems, and provides a breaker that detects waveform characteristics of zero-sequence current and zero-sequence voltage that occur when at least one of the breaker and the switch operates. , the object is to obtain a switch operation detection device. Means for Solving the Problems A device for detecting operation of a breaker and a switch according to the present invention detects zero-sequence current detected by a zero-sequence current detector and a zero-sequence voltage detector, respectively, provided in a power distribution line. The input waveform analysis data of the zero-sequence voltage is compared with the waveform analysis data of the zero-sequence current and zero-sequence voltage registered in advance when the breaker or switch operates, and when the predetermined conditions are satisfied, the operation is detected. It is designed to output a signal.
この発明におけるしゃ断器、開閉器の動作検出装置は、
しゃ断器又は開閉器が動作したことを確実に検出するこ
とができる。The circuit breaker and switch operation detection device in this invention includes:
It is possible to reliably detect that the circuit breaker or switch has operated.
以下、この発明の一実施例を図について説明する。第１
図においては第８図と対応する部分には同一符号を付し
て説明を省略する。ＺＣＴｏ＋〜ＺＣＴ、、は各配電線
り、−Ｌ、１に設けられた動作検出用の零相電流検出器
（以下零相変流器と記す）で、それぞれ電流■。１〜
ＩＯｎを出力する。ＣＴＩ〜ＣＴｎは動作検出用の変流
器で、それぞれ電流１１〜１．を出力する。３は動作検
出演算部で、上記各電流！０１〜１．．，１．〜■７が
加えられると共に、零相電圧検出器（以下接地用変圧器
と記す）ＧＰＴから得られる零相電圧■。及び２次側の
線間電圧■、が加えられる。１４は動作検出演算部３の
演算結果を表示するＣＲＴ等から成る表示装置である。
第２図は動作検出演算部３の構成を示すブロック図であ
り、第２図において、４は上記各電流Ｉ ＯＩ〜Ｉ Ｏ
ｌｌ＋ Ｉ ｌ ”” Ｉ ｎ及び各電圧Ｖ０．Ｖ、
を所定周期でサンプリングして保持するサンプルホール
ド回路、５はサンプルホールド回路４のサンプル値を順
次に取り出すマルチプレクサ、６はマルチプレクサ５か
ら順次に得られる各サンプル値をディジタルデータに変
換するＡ／Ｄ変換器、７はＲＡＭから成るメモリで、Ａ
／Ｄ変換器６から出力される各電流Ｉ０１〜Ｉ Ｏｎ、
■１〜Ｉ７及び電圧■。、■８の入力波形データと、こ
の入力波形データを波形解析した入力波形解析データと
から成る入力データが書き込まれる。
８はＲＯＭから成るメモリで、しゃ断器ＣＢ。
〜ＣＢｎ及び開閉器（以下区分開閉器と記す）Ｓ Ｓ
ｚ””ＳＳ ＋−，Ｓ Ｓ ＋ｚ〜ＳＳ１が動作した時
における各零相電流、零相電圧の特異波形データ及びそ
の波形解析データとから成るＣＢ、ＳＳ動作時データが
格納されている。
９はメモリ７のデータとメモリ８のデータとを照合して
、所定の演算を行うＣＰＵ、１０はＣＰＵ９の演算処理
プログラムが格納されたプログラムメモリ、１１はＣＰ
Ｕ９と各部とを接続するパスライン、１２はＣＰＵ９の
演算結果に基いて表示装置１４を制御するコントローラ
、１３はＣＰＵ９の演算結果によるＣＢ、ＳＳ動作検出
信号を出力するためのプロセス入出力回路である。
次に動作について説明する。各配電線り、〜Ｌｌ、にお
ける零相変流器ＺＣＴｏ＋〜ＺＣＴ、ｌ及び変流器ＣＴ
、〜ＣＴ、、から得られる零相電流■。１〜■。７．線
電流■、〜■、と、接地用変圧器ＧＰＴから得られる零
相電圧■。、線間電圧Ｖ、は動作検出演算部３に送られ
、サンプルホールド回路４でサンプリングされる。第３
図は零相電流Ｉ０．。
■。２を例として、サンプリングの様子を示すもので、
それぞれ所定周期でサンプリングされることにより、Ｉ
Ｏ＋についてはサンプル値ＤＩｌ〜Ｄｌｒ＋が得られ
、１ ｏｚについてはサンプル値Ｉ）ｉｔ〜Ｄｔｎが得
られる。これらのサンプル値はマルチプレクサ５により
順次に取り出され、次にＡ／Ｄ変換器６でディジタルデ
ータに変換された後、メモリ７に書゛き込まれる。
一方、メモリ８には、例えば第４図及び第５図に示すよ
うな、しゃ断器ＣＢＩ−ＣＢ、及び区分開閉器Ｓ Ｓ＋
＋＝Ｓ Ｓ、ｌＩ、 Ｓ Ｓ＋ｚ〜ＳＳ、ｌＩが、動
作したときに発生する各零相電流Ｉ。ｌ”” Ｉ Ｏｎ
＋零相電圧Ｖ０．線間電圧■３の特異波形から得られる
波形データとその波形解析データとから成るＣＢ。
ＳＳ動作時データがあらかじめ格納されている。
しゃ断器ＣＢ、−ＣＢ、が投入された時は、３相間の不
揃い投入に起因して、第４図（Ａ）のような振動波形が
現われる。同図（Ｂ）は上記振動波形を解析した波形解
析データである。また、区分開閉器ＳＳ＋＋”Ｓｆｉ＋
、ＳＳ＋ｚ〜ＳＳ、□が投入された時は、第５図（Ａ）
又は（Ｂ）のような振動波形が現われる。同図（Ａ）は
ｖｏに振動波形が生じた場合を示し、同図（Ｂ）は■。
に振動波形が殆んど生じない場合を示す。Ｖｏの大きさ
は、接地用変圧器ＧＰＴによって接続された限流抵抗器
に並列に入る配電線の大地間浮遊静電容量を通じて電流
が流れるため、上記限流抵抗器の両端電圧として現われ
るｖｏには、上記のように振動の有無が生じる。
なお、上記波形解析データは波形データの特徴を解析し
たもので、例えば、■。１〜■。１．■、〜１、、Ｖｏ
、Ｖ、の各波形の基本波実効値、継続時間、波高値（ｐ
−ｐｉ直）、直流分の大きさ、高調波ｆ１〜ｆ、成分の
大きさ、■。と■。１〜ＩＯ，。
との各位相角等の項目について解析したものである。
ＣＰＵ９はメモリ７の入力データとメモリ８のＣＢ、Ｓ
Ｓ動作時データとを照合し、第６図に示す動作検出ロジ
ッ名を用いて動作検出のための演算を行う。第６図にお
いて、先ず、入力データの１６１”’ＩＯｎについて、
図示の（０） 〜（４）の各条件を満たしているか否か
を調べる。即ち、（０）Ｌ＋〜Ｉｏｎの波形のｐ−ｐ値
が一定値以上となっているか、（１）■。１〜ＩＯＲの
波形が一定時間以上継続しているか、（２）１．、〜Ｉ
Ｏａの基本波の実効値が一定値以上となっているか、（
３）■。１〜Ｉ Ｏ，、の直流レベルが一定値以下とな
っているか、（４）■。１〜１６ｎのｆ１〜ｆ、の各高
調波の実効値がそれぞれ設定範囲内にあるか、を調べる
。そして上記（０）〜（４）の各条件が１０１〜■。１
の各々について全部溝たされていれば、１０１〜Ｉ Ｏ
ｎ毎にＹＥＳの信号をＯＲゲートを通じてＡＮＤゲート
に出力する。
次に、■。が上記（０）〜（４）の各条件を満たしてい
るか調べ、全て満たしていれば、ＹＥＳの信号をＡＮＤ
ゲートに出力する。さらに、ＶｏとＩｏＩ＝Ｉｏａとに
ついて、それぞれ両者の立上り時刻が一定時間内にある
か否かを調べ、一定時間内にあればＹＥＳの信号を、Ｉ
ＯＩ””Ｉ０ｎ毎にＡＮＤゲートに出力する。以上に
より、ＡＮＤゲートは、それぞれの条件が満たされたと
きに、ＣＢ、３３動作検出信号を出力する。
またＣＢ、３３動作検出信号を出力するときは、その内
容を表示装置１４で表示する。表示の内容としては、例
えば電流、電圧の波形、ＣＢ、ＳＳ動作が検出された配
電線名、検出時刻、波形解析データ等が必要に応じて表
示される。
尚、上記実施例ではしゃ断器、開閉器の動作検出装置を
配電用変電所に設けた例を述べたが、配電線上例えば区
分開閉器の設置箇所に設けても、あるいは検出部のみを
当該設置箇所に設けても同様の効果を奏する。
又、零相電圧、零相電流の検出器として専用の接地用変
圧器２零相変流器を用いたが既設設備を流用しても、又
、光センサ等の他の検出方式の検出器を用いても同様の
効果を奏する。An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, parts corresponding to those in FIG. 8 are designated by the same reference numerals, and their explanation will be omitted. ZCTo+~ZCT, , are zero-phase current detectors (hereinafter referred to as zero-phase current transformers) for operation detection provided on each distribution line, -L, 1, and each has a current ■. 1~
Output IOn. CTI to CTn are current transformers for operation detection, and have currents of 11 to 1. Output. 3 is the operation detection calculation section, which calculates each of the above currents! 01-1. ．． ,1. 〜■7 is added, and the zero-sequence voltage ■ obtained from the zero-sequence voltage detector (hereinafter referred to as a grounding transformer) GPT. and the line voltage (■) on the secondary side are applied. Reference numeral 14 denotes a display device such as a CRT for displaying the calculation results of the motion detection calculation unit 3. FIG. 2 is a block diagram showing the configuration of the motion detection calculation unit 3. In FIG.
ll+I l ”” I n and each voltage V0. V,
5 is a multiplexer that sequentially takes out the sample values of the sample hold circuit 4, and 6 is an A/D conversion that converts each sample value sequentially obtained from the multiplexer 5 into digital data. 7 is a memory consisting of RAM, A
/Each current I01 to IOn output from the D converter 6,
■1 to I7 and voltage ■. , ■8 input waveform data and input waveform analysis data obtained by waveform analysis of this input waveform data are written. 8 is a memory consisting of ROM, and is a circuit breaker CB. ~CBn and switch (hereinafter referred to as sectional switch) S S
CB and SS operation data consisting of singular waveform data of each zero-sequence current and zero-sequence voltage and their waveform analysis data when z""SS +-, S S +z to SS1 are operated are stored. 9 is a CPU that compares the data in the memory 7 with the data in the memory 8 and performs a predetermined calculation; 10 is a program memory in which the calculation processing program of the CPU 9 is stored; 11 is a CPU
12 is a controller that controls the display device 14 based on the calculation results of the CPU 9; 13 is a process input/output circuit for outputting CB and SS operation detection signals based on the calculation results of the CPU 9; be. Next, the operation will be explained. Zero-phase current transformer ZCTo+~ZCT,l and current transformer CT in each distribution line ~Ll
, ~CT, , the zero-sequence current ■. 1~■. 7. The line current ■, ~■, and the zero-sequence voltage ■ obtained from the grounding transformer GPT. , line voltage V, are sent to the motion detection calculation section 3 and sampled by the sample hold circuit 4. Third
The figure shows zero-sequence current I0. . ■. 2 is used as an example to show the sampling situation.
By sampling each at a predetermined period, I
For O+, sample values DIl to Dlr+ are obtained, and for 1 oz, sample values I)it to Dtn are obtained. These sample values are sequentially taken out by the multiplexer 5, then converted into digital data by the A/D converter 6, and then written into the memory 7. On the other hand, the memory 8 stores circuit breakers CBI-CB and section switches S S+ as shown in FIGS. 4 and 5, for example.
+=S S, lI, S S+z ~ Each zero-sequence current I generated when SS, lI operate. l”” I On
+Zero-sequence voltage V0. CB consisting of waveform data obtained from the singular waveform of line voltage ■3 and its waveform analysis data. Data during SS operation is stored in advance. When the circuit breakers CB and -CB are turned on, a vibration waveform as shown in FIG. 4(A) appears due to the uneven turning on of the three phases. Figure (B) shows waveform analysis data obtained by analyzing the vibration waveform. In addition, the section switch SS++”Sfi+
, SS+z~SS, When □ is input, Figure 5 (A)
Or a vibration waveform like that shown in (B) appears. The same figure (A) shows the case where a vibration waveform occurs in vo, and the same figure (B) shows ■. This shows the case where almost no vibration waveform occurs. The magnitude of Vo is determined by vo appearing as the voltage across the current limiting resistor because current flows through the ground-to-ground stray capacitance of the distribution line that is connected in parallel to the current limiting resistor connected by the grounding transformer GPT. The presence or absence of vibration occurs as described above. Note that the above waveform analysis data is obtained by analyzing the characteristics of waveform data, for example, ■. 1~■. 1. ■、〜１、、Vo
, V, fundamental wave effective value, duration, peak value (p
-pi direct), magnitude of DC component, harmonics f1 to f, component magnitude, ■. and ■. 1~IO,. This is an analysis of items such as each phase angle. The CPU 9 receives input data from the memory 7 and CB and S from the memory 8.
S is compared with the data during operation, and calculations for motion detection are performed using the motion detection logic name shown in FIG. In FIG. 6, first, regarding the input data 161''IOn,
It is checked whether each of the conditions (0) to (4) shown in the figure are satisfied. That is, (0) Is the pp value of the waveform from L+ to Ion greater than a certain value? (1) ■. Whether the waveform of 1 to IOR continues for a certain period of time or more, (2) 1. ,~I
Is the effective value of the fundamental wave of Oa greater than a certain value? (
3) ■. Is the DC level of 1 to I O, below a certain value?(4)■. It is checked whether the effective values of each harmonic of f1 to f of 1 to 16n are within the set range. Each of the conditions (0) to (4) above is 101 to ■. 1
If all grooves are filled for each of 101 to IO
A YES signal is output to the AND gate through the OR gate every n. Next, ■. Check whether the above conditions (0) to (4) are satisfied, and if all are satisfied, AND the YES signal.
Output to the gate. Furthermore, it is checked whether the rising times of Vo and IoI=Ioa are within a certain period of time, and if they are within a certain period of time, a YES signal is sent to Io.
Output to the AND gate every OI""I0n. As described above, the AND gate outputs the CB and 33 operation detection signals when each condition is satisfied. Further, when outputting the CB, 33 operation detection signal, its contents are displayed on the display device 14. As the display contents, for example, current and voltage waveforms, names of distribution lines where CB and SS operations were detected, detection times, waveform analysis data, etc. are displayed as necessary. In addition, in the above embodiment, an example was described in which the operation detection device for circuit breakers and switches was installed in a distribution substation, but it can also be installed at the location where a sectional switch is installed on the distribution line, or only the detection unit can be installed. The same effect can be obtained even if it is provided at a certain location. In addition, although a dedicated grounding transformer and two zero-phase current transformers were used as zero-sequence voltage and zero-sequence current detectors, existing equipment could be used, or detectors using other detection methods such as optical sensors could be used. The same effect can be achieved by using .
以上のように、この発明によれば、しゃ断器。
開閉器が故障以外の原因、例えば、手動による開閉操作
等で動作したときに発生する電流、電圧の特異波形を、
故障により発生した特異波形と区別して確実に検出する
ことができる効果がある。As described above, according to the present invention, there is provided a breaker. The peculiar waveforms of current and voltage that occur when a switch is operated due to a cause other than a failure, such as manual opening/closing operation, are
This has the effect of being able to be reliably detected, distinguishing it from a peculiar waveform caused by a failure.
第１図はこの発明の一実施例によるしゃ断器。
区分開閉器の動作検出装置を示すブロック図、第２図は
同装置の動作検出演算部のブロック図、第３図は同装置
の電流のサンプリングの状態を示す波形図、第４図（Ａ
）は同装置のしゃ断器の投入時における電流、電圧の波
形図、第４図（Ｂ）は波形解析データ図、第５図は同装
置の区分開閉器の投入時における電流、電圧の波形図、
第６図は同装置の動作検出ロジックを示すブロック図、
第７図は従来の配電系統を示すブロック図、第８図は同
配電系統のしゃ断器の駆動回路を示すブロック図である
。
２は母線＋ Ｌ Ｉ −Ｌ ｎは配電線、ＧＰＴは零
相電圧検出器、ＺＣＴ、、〜ＺＣＴｏ、、は零相電流検
出器、３は動作検出演算部、７．８はメモリ、９はＣＰ
Ｕ。
なお、図中、同一符号は同一、又は相当部分を示す。FIG. 1 shows a breaker according to an embodiment of the present invention. FIG. 2 is a block diagram showing the operation detection device for a sectional switch; FIG. 2 is a block diagram of the operation detection calculation section of the device; FIG.
) is a current and voltage waveform diagram when the breaker of the same equipment is closed, Figure 4 (B) is a waveform analysis data diagram, and Figure 5 is a current and voltage waveform diagram when the sectional switch of the same equipment is closed. ,
FIG. 6 is a block diagram showing the operation detection logic of the device;
FIG. 7 is a block diagram showing a conventional power distribution system, and FIG. 8 is a block diagram showing a drive circuit for a circuit breaker in the power distribution system. 2 is the bus bar + L I -L n is the distribution line, GPT is the zero-phase voltage detector, ZCT, , ~ZCTo, , is the zero-phase current detector, 3 is the operation detection calculation unit, 7.8 is the memory, and 9 is the C.P.
U. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
閉器を介して給電する配電系統において、系統の零相電
圧を検出する零相電圧検出器と、系統の零相電流を検出
する零相電流検出器と、上記零相電圧検出器及び零相電
流検出器の各出力に基いて上記零相電圧及び上記零相電
流の各波形を解析した入力波形解析データが格納される
メモリと、上記しゃ断器及び開閉器の少なくとも一方が
動作した時における上記零相電圧及び零相電流の各波形
の特徴が予め解析した動作時波形解析データとして予め
登録されるメモリと、上記各メモリから読み出された上
記入力波形解析データと上記動作時波形解析データとを
照合し、所定条件を満足したとき動作検出信号を出力す
る動作検出演算部とを備えたしゃ断器、開閉器の動作検
出装置。In a power distribution system that supplies power from the busbar of an electric station to multiple distribution lines via circuit breakers and switches, a zero-sequence voltage detector detects the zero-sequence voltage of the system, and a zero-sequence voltage detector detects the zero-sequence current of the system. a current detector, and a memory storing input waveform analysis data obtained by analyzing each waveform of the zero-sequence voltage and the zero-sequence current based on each output of the zero-sequence voltage detector and the zero-sequence current detector; A memory in which characteristics of each waveform of the zero-sequence voltage and zero-sequence current when at least one of the breaker and the switch operates are registered in advance as operating waveform analysis data analyzed in advance, and read out from each of the memories. An operation detection device for a circuit breaker or a switch, comprising: an operation detection calculation unit that compares the input waveform analysis data with the operation waveform analysis data and outputs an operation detection signal when a predetermined condition is satisfied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1211666A JP2635176B2 (en) | 1989-08-17 | 1989-08-17 | Circuit breaker / switch operation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1211666A JP2635176B2 (en) | 1989-08-17 | 1989-08-17 | Circuit breaker / switch operation detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0378422A true JPH0378422A (en) | 1991-04-03 |
| JP2635176B2 JP2635176B2 (en) | 1997-07-30 |
Family
ID=16609585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1211666A Expired - Fee Related JP2635176B2 (en) | 1989-08-17 | 1989-08-17 | Circuit breaker / switch operation detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2635176B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013207990A (en) * | 2012-03-29 | 2013-10-07 | Chugoku Electric Power Co Inc:The | Power distribution automation system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS526950A (en) * | 1975-07-04 | 1977-01-19 | Hitachi Ltd | Accident phenomenon far off analysis indication device |
| JPS5480533A (en) * | 1977-12-09 | 1979-06-27 | Hitachi Ltd | Protector for transformer |
| JPS6170473A (en) * | 1984-09-13 | 1986-04-11 | Shigeru Ebihara | Waveform analyzer |
| JPS62112055A (en) * | 1985-11-09 | 1987-05-23 | Ito Kensetsu Kk | Method and device for discriminating kind of buried tube |
| JPS63178722A (en) * | 1987-01-14 | 1988-07-22 | 株式会社東芝 | Protective relay |
| JPS63164334U (en) * | 1987-04-15 | 1988-10-26 |
-
1989
- 1989-08-17 JP JP1211666A patent/JP2635176B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS526950A (en) * | 1975-07-04 | 1977-01-19 | Hitachi Ltd | Accident phenomenon far off analysis indication device |
| JPS5480533A (en) * | 1977-12-09 | 1979-06-27 | Hitachi Ltd | Protector for transformer |
| JPS6170473A (en) * | 1984-09-13 | 1986-04-11 | Shigeru Ebihara | Waveform analyzer |
| JPS62112055A (en) * | 1985-11-09 | 1987-05-23 | Ito Kensetsu Kk | Method and device for discriminating kind of buried tube |
| JPS63178722A (en) * | 1987-01-14 | 1988-07-22 | 株式会社東芝 | Protective relay |
| JPS63164334U (en) * | 1987-04-15 | 1988-10-26 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013207990A (en) * | 2012-03-29 | 2013-10-07 | Chugoku Electric Power Co Inc:The | Power distribution automation system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2635176B2 (en) | 1997-07-30 |
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