JP3457990B2 - Method and apparatus for determining disconnection point of high-voltage distribution line - Google Patents
Method and apparatus for determining disconnection point of high-voltage distribution lineInfo
- Publication number
- JP3457990B2 JP3457990B2 JP04726994A JP4726994A JP3457990B2 JP 3457990 B2 JP3457990 B2 JP 3457990B2 JP 04726994 A JP04726994 A JP 04726994A JP 4726994 A JP4726994 A JP 4726994A JP 3457990 B2 JP3457990 B2 JP 3457990B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- disconnection
- distribution line
- switch
- power supply
- 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 - Lifetime
Links
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Locating Faults (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は高圧配電線の断線箇所を
決定する方法及び装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for determining a breakage point of a high voltage distribution line.
【０００２】[0002]
【従来の技術】従来、配電系統の途中に複数の開閉器を
設けた高圧配電線路において断線事故が発生した場合に
は、発見者からの通報がなければ断線事故が発生したこ
とを知ることができなかった。また断線事故が発生して
地絡事故に至った場合でも、再閉路成功により断線した
配電線が充電されたまま放置されることになり、人身事
故が発生する危険性があった。そこで断線区間を検出し
て、断線区間を配電系統から切り離す技術が開発される
ようになってきた。例えば、特開平５−３８０４４号公
報に示された停電箇所の自動検出方法では、配電用変圧
器の電圧や電流の状態を常時監視するために、配電用変
圧器に対してそれぞれ設けられる変圧器計測端末（ＴＭ
Ｕ）を断線検出用センサとして利用している。この方法
では、営業所に設置した親局からの指令に応じて変圧器
計測端末が計測結果を親局に送信する機能を有している
ことに着目し、配電線路に分散配置した各変圧器計測端
末に定期的に呼び出し指令を一斉に出す。そして各変圧
器計測端末から送信されてくる計測結果に基づいて、親
局側に設けた電算機を用いて速やかに断線区間を検出す
る。その後、検出した断線区間を挟む位置にある開閉器
に設けた子局に親局から切離し指令または開指令を出し
て開閉器を開くようにしている。この従来の方法では、
特開平４−４９８１３号公報に示された開閉器の切離し
制御方法を併用することにより、断線区間を１０秒以内
に配電系統から切り離すことを可能にしている。2. Description of the Related Art Conventionally, when a disconnection accident occurs in a high-voltage distribution line provided with a plurality of switches in the middle of a distribution system, it is possible to know that the disconnection accident has occurred unless the finder discovers it. could not. In addition, even if a disconnection accident occurs and a ground fault occurs, a broken redistribution line will be left charged and a personal injury risk will occur due to the successful reclosing. Therefore, a technique has been developed to detect the disconnection section and disconnect the disconnection section from the distribution system. For example, in the automatic detection method of a power failure point disclosed in Japanese Patent Laid-Open No. 5-38044, a transformer provided for each distribution transformer in order to constantly monitor the voltage and current states of the distribution transformer. Measuring terminal (TM
U) is used as a sensor for detecting disconnection. In this method, focusing on the fact that the transformer measurement terminal has the function of transmitting the measurement results to the parent station in response to the command from the parent station installed in the sales office, each transformer distributed in the distribution line is distributed. Send a call command to the measuring terminals periodically. Then, based on the measurement result transmitted from each transformer measurement terminal, the disconnection section is promptly detected using the computer provided on the master station side. After that, a disconnection command or an opening command is issued from the master station to the slave station provided in the switch located at the position sandwiching the detected disconnection section to open the switch. In this traditional method,
By using the switch disconnection control method disclosed in JP-A-4-49813 in combination, it is possible to disconnect the disconnection section from the power distribution system within 10 seconds.
【０００３】[0003]
【発明が解決しようとする課題】変圧器計測端末は配電
用変圧器（通常は柱上変圧器）が装着される変圧器装着
用電柱に装着されており、開閉器は２本の変圧器装着用
電柱の間の別の電柱（開閉器装着用電柱）に装着されて
いる。通常、変圧器装着用電柱と開閉器装着用電柱との
間の距離は、２００ｍ〜１０００ｍ離れている。図４に
示すように、変圧器計測端末ＴＭＵ１〜ＴＭＵ７の出力
を利用して断線区間を検出する場合には、変圧器装着用
電柱間における断線の発生は検出できるものの、変圧器
装着用電柱と開閉器装着用電柱との間（Ａ点またはＢ
点）で断線が発生した場合に、Ａ点側またはＢ点側のい
ずれで断線が発生したのかを検出することができない。
そのため従来の方法では、前述のＡ点またはＢ点で断線
が発生した場合でも、二つの変圧器計測端末ＴＭＵ３及
びＴＭＵ４の全区間を調べなければ、断線箇所を特定で
きない場合があり、停電の復旧が遅れるおそれがあっ
た。特に、最近は絶縁被覆された電線ケーブルが用いら
れるため、外側から断線を発見することができない場合
が多い。The transformer measuring terminal is mounted on a transformer-mounted power pole on which a distribution transformer (usually a pole transformer) is mounted, and a switch is mounted on two transformers. It is installed on another utility pole (switch-installing utility pole) between utility poles. Normally, the distance between the transformer mounting power pole and the switch mounting power pole is 200 m to 1000 m. As shown in FIG. 4, when the disconnection section is detected by using the outputs of the transformer measurement terminals TMU1 to TMU7, the occurrence of the disconnection between the transformer mounting poles can be detected, but Between switch-mounted electric pole (point A or B
When the disconnection occurs at (point), it is not possible to detect whether the disconnection occurs at the A point side or the B point side.
Therefore, in the conventional method, even if a disconnection occurs at point A or point B described above, the disconnection point may not be identified unless all sections of the two transformer measurement terminals TMU3 and TMU4 are examined, and restoration of the power failure may occur. Could be delayed. In particular, recently, since electric wires and cables coated with insulation are used, it is often impossible to find a disconnection from the outside.
【０００４】本発明の目的は、従来よりも断線区間の検
出精度が高い高圧配電線の断線箇所決定方法及び装置を
提供することにある。An object of the present invention is to provide a method and a device for determining a disconnection point of a high-voltage distribution line, which has a higher detection accuracy of a disconnection section than ever before.
【０００５】[0005]
【課題を解決するための手段】請求項１の発明は、配電
用変圧器及び変圧器計測端末が設置された変圧器設置部
が所定の距離をあけて配置され、変圧器設置部間に開閉
器が設置された開閉器設置部が配置されてなる高電圧配
線路における高圧配電線の断線箇所を決定する方法を対
象とする。変圧器設置部及び開閉器設置部は、通常電柱
に設置されることになるが、埋設ケーブルの場合には、
地上または地中に設置されることになる。According to a first aspect of the present invention, a transformer installation section in which a distribution transformer and a transformer measurement terminal are installed is arranged with a predetermined distance, and a switch is installed between the transformer installation sections. A method for determining a disconnection point of a high-voltage distribution line in a high-voltage wiring path in which a switch installation section in which a switch is installed is arranged. The transformer installation part and the switch installation part will normally be installed on a utility pole, but in the case of a buried cable,
It will be installed on the ground or underground.
【０００６】本発明では、まず開閉器の電源側配電線と
大地との間の対地電圧を測定する電源側電圧センサ及び
開閉器の負荷側配電線と大地との間の対地電圧を測定す
る負荷側電圧センサとを開閉器設置部に設ける。そして
電源側電圧センサ及び負荷側電圧センサの出力から電源
側配電線及び負荷側配電線のいずれ側で断線が発生した
かを断線検出装置により判定する。そして断線検出装置
の出力と変圧器計測端末の出力とに基づいて断線箇所を
決定する。In the present invention, first, a power supply side voltage sensor for measuring the ground voltage between the power supply side distribution line of the switch and the ground and a load for measuring the ground voltage between the load side distribution line of the switch and the ground. A side voltage sensor and a switch voltage sensor are installed in the switch installation section. Then, the disconnection detection device determines from which of the power supply side distribution line and the load side distribution line the disconnection has occurred based on the outputs of the power supply side voltage sensor and the load side voltage sensor. Then, the disconnection point is determined based on the output of the disconnection detection device and the output of the transformer measurement terminal.
【０００７】請求項２の発明は、高電圧配線路における
高圧配電線の断線箇所を決定する断線箇所決定装置を対
象にする。本発明では、開閉器設置部に設けられて開閉
器の電源側配電線と大地との間の対地電圧を測定する電
源側電圧センサと、開閉器設置部に設けられて開閉器の
負荷側配電線と大地との間の対地電圧を測定する負荷側
電圧センサとを用いる。そして電源側電圧センサ及び負
荷側電圧センサの出力から電源側配電線及び負荷側配電
線のいずれ側で断線が発生したかを判定する断線検出装
置と、断線検出装置の出力と変圧器計測端末の出力とに
基づいて断線箇所を決定する断線箇所決定手段とを更に
用いる。The invention of claim 2 is directed to a disconnection point determining device for determining a disconnection point of a high-voltage distribution line in a high-voltage wiring path. In the present invention, a power supply side voltage sensor that is provided in the switch installation part and measures the ground voltage between the power supply side distribution line of the switch and the ground, and a load side distribution of the switch provided in the switch installation part. A load side voltage sensor that measures the voltage to ground between the wire and ground is used. And a disconnection detection device that determines which side of the power supply side distribution line and the load side distribution line the disconnection has occurred from the output of the power supply side voltage sensor and the load side voltage sensor, the output of the disconnection detection device and the transformer measurement terminal And a disconnection point determining means for determining the disconnection point based on the output.
【０００８】請求項３の発明では、断線検出装置を開閉
器設置部にそれぞれ設ける。According to the third aspect of the present invention, the disconnection detection device is provided in each switch installation portion.
【０００９】請求項４の発明では、断線検出装置を、電
源側電圧センサまたは負荷側電圧センサが検出した対地
電圧を演算可能な信号に変換する信号変換手段と、信号
変換手段の出力に基づいて断線の発生を判定する判定手
段と、判定手段の判定結果を記憶する記憶手段と、記憶
手段の記憶内容を送信指令に応じて親局に伝送する送受
信手段と、停電時に電源となるバックアップ電源を含む
電源装置とから構成する。According to another aspect of the present invention, the disconnection detecting device converts the ground voltage detected by the power source side voltage sensor or the load side voltage sensor into a computable signal, and based on the output of the signal converting means. A judgment means for judging the occurrence of disconnection, a storage means for storing the judgment result of the judgment means, a transmission / reception means for transmitting the stored contents of the storage means to the master station in response to a transmission command, and a backup power supply serving as a power supply in case of power failure. It includes a power supply device including the power supply device.
【００１０】請求項５の発明では、信号変換手段を対地
電圧をデジタル信号に変換するアナログ−デジタル変換
器と対地電圧を線間電圧に変換する演算手段とから構成
し、記憶手段として演算手段で演算した線間電圧を記憶
する記憶部を更に備えたものを用いる。According to the invention of claim 5, the signal converting means comprises an analog-digital converter for converting the ground voltage to a digital signal and an arithmetic means for converting the ground voltage to a line voltage. The one having a storage unit for storing the calculated line voltage is used.
【００１１】[0011]
【作用】請求項１及び２の発明のように、電源側電圧セ
ンサ及び負荷側電圧センサを設けて、断線検出装置によ
り開閉器の電源側配電線または負荷側配電線のいずれで
断線が発生したかを検出できれば、あとはこの検出結果
と変圧器計測端末の出力の有無とを合わせて考慮するこ
とにより、開閉器と変圧器計測端末との間で断線が発生
した場合に、その区間を正確に決定することができる。
即ち断線検出装置が電源側配電線で断線が発生したと判
定したときに、電源側で開閉器に一番近い変圧器計測端
末の出力が正常を示しているとすれば、この変圧器計測
端末と開閉器との間で断線が発生したことが判る。同じ
条件で、電源側で開閉器に一番近い変圧器計測端末の出
力が停電状態を検出していれば、その変圧器計測端末よ
りも電源側に位置する変圧器計測端末で正常を示してい
る変圧器計測端末とその後の変圧器計測端末との間で断
線が発生していることが判る。また断線検出装置が負荷
側配電線で断線が発生したと判定したときには、開閉器
と負荷側で一番最初の変圧器計測端末との間で断線が発
生していることが判る。According to the first and second aspects of the present invention, the power source side voltage sensor and the load side voltage sensor are provided, and the disconnection detection device causes a disconnection in either the power supply side distribution line or the load side distribution line of the switch. If it is possible to detect whether or not there is a disconnection between the switch and the transformer measurement terminal, the section can be accurately determined by considering the detection result and the output of the transformer measurement terminal. Can be determined.
That is, when the disconnection detection device determines that a disconnection has occurred in the power supply side distribution line, if the output of the transformer measurement terminal closest to the switch on the power supply side shows normal, this transformer measurement terminal It can be seen that a disconnection occurred between the switch and the switch. Under the same conditions, if the output of the transformer measurement terminal closest to the switch on the power supply side detects a power failure state, the transformer measurement terminal located on the power supply side of the transformer measurement terminal indicates normal. It can be seen that there is a disconnection between the existing transformer measuring terminal and the transformer measuring terminal that follows. Further, when the disconnection detection device determines that a disconnection has occurred in the load side distribution line, it is understood that a disconnection has occurred between the switch and the first transformer measurement terminal on the load side.
【００１２】請求項３の発明のように、断線検出装置を
開閉器設置部にそれぞれ設けると、断線検出装置の数は
開閉器の数と同じ数だけ必要になるが、開閉器の数が増
減しても、基本的には親局の構成を変える必要がなく、
柔軟性の高い配電系統システムを構築できる。When the disconnection detecting devices are provided in the switch installation portions as in the third aspect of the invention, the number of disconnection detecting devices is equal to the number of switches, but the number of switches is increased or decreased. However, basically there is no need to change the configuration of the master station,
It is possible to construct a highly flexible power distribution system.
【００１３】請求項４の発明のように、判定結果を記憶
手段に記憶しておき、判定結果を親局からの送信指令に
応じて伝送することができるように断線検出装置を構成
すると、親局側の運転システムの構築が容易になる。According to the fourth aspect of the invention, when the disconnection detecting device is configured so that the determination result is stored in the storage means and the determination result can be transmitted according to the transmission command from the master station, It becomes easy to build an operating system on the station side.
【００１４】請求項５の発明のように、対地電圧を線間
電圧に変換して、これを記憶部に記憶するように断線検
出装置を構成すると、断線の判定だけでなく、高圧負荷
の管理にも断線検出装置を用いることができる。即ち線
間電圧を出力できるようにすると、各開閉器の区間にお
ける電圧の降下状態を検知することができ、このデータ
に基づいて電力用コンデンサの制御を行えば、高圧配電
線の電圧降下を有効に且つ高い精度で改善できる。According to the fifth aspect of the invention, when the disconnection detecting device is configured to convert the ground voltage to the line voltage and store the voltage in the storage unit, not only the disconnection determination but also the management of the high voltage load. Also, a disconnection detection device can be used. That is, if the line voltage can be output, the voltage drop state in each switch section can be detected, and if the power capacitor is controlled based on this data, the voltage drop of the high-voltage distribution line can be effective. It can be improved with high accuracy.
【００１５】[0015]
【実施例】以下図面を参照して、本発明の実施例を詳細
に説明する。図１は、本発明の方法を実施するための高
圧配電線の系統図を概略的に単相で示している。高圧配
電線は実際には三相である。図１において、ＴＲ１〜Ｔ
Ｒ７は、電柱に装着された配電用変圧器であり、ＴＭＵ
１〜ＴＭＵ７は、変圧器ＴＲ１〜ＴＲ７と一緒に同じ電
柱に装着された変圧器計測端末である。本実施例では、
開閉器１〜４に対して、電源側配電線と大地との間の対
地電圧を測定する電源側電圧センサＶＤ１〜ＶＤ４と負
荷側配電線と大地との間の対地電圧を測定する負荷側電
圧センサＶＤ５〜ＶＤ８とを設けている。電源側電圧セ
ンサＶＤ１〜ＶＤ４と負荷側電圧センサＶＤ５〜ＶＤ８
の出力は、断線検出装置ＤＤＵ１〜ＤＤＵ４に入力され
ている。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows schematically a single-phase schematic diagram of a high-voltage distribution line for carrying out the method according to the invention. High voltage distribution lines are actually three-phase. In FIG. 1, TR1 to T
R7 is a distribution transformer mounted on a utility pole,
1 to TMU7 are transformer measuring terminals mounted on the same electric pole together with the transformers TR1 to TR7. In this embodiment,
For switches 1 to 4, power supply side voltage sensors VD1 to VD4 that measure the ground voltage between the power supply side distribution line and the ground, and load side voltage that measures the ground voltage between the load side distribution line and the ground. Sensors VD5 to VD8 are provided. Power supply side voltage sensors VD1 to VD4 and load side voltage sensors VD5 to VD8
The output of is input to the disconnection detection devices DDU1 to DDU4.
【００１６】図２には、一例として、開閉器１、変圧器
計測端末ＴＭＵ１及びＴＭＵ２、電圧センサＶＤ１及び
ＶＤ５及び断線検出装置ＤＤＵ１の関係と各部のより詳
細な構成を示してある。開閉器１は三相高圧配電線Ｕ，
Ｖ，Ｗに接続された開閉接点を有しており、図示しない
制御装置によって開閉制御される。開閉器１が設置され
る開閉器設置部としての開閉器設置用電柱には、営業所
などに配置された親局と光ケーブルを介して接続された
子局（中継器）が一緒に設置されている。開閉器１の制
御装置は、この子局からの指令によって開閉器１を制御
する。FIG. 2 shows, as an example, the relationship between the switch 1, the transformer measuring terminals TMU1 and TMU2, the voltage sensors VD1 and VD5, and the disconnection detecting device DDU1 and the detailed configuration of each part. The switch 1 is a three-phase high voltage distribution line U,
It has an open / close contact connected to V and W, and is opened / closed by a control device (not shown). On the switch installation pole as the switch installation section where the switch 1 is installed, the master station located at the sales office and the slave station (repeater) connected via the optical cable are installed together. There is. The controller of the switch 1 controls the switch 1 according to the command from this slave station.
【００１７】電源側電圧センサＶＤ１及び負荷側電圧セ
ンサＶＤ５を構成する電圧センサＶＤ１ｕ〜ＶＤ１ｗ及
びＶＤ５ｕ〜ＶＤ５ｗとしては、アレスタにより分圧回
路を構成した構造のものを用いることができる。この種
の電圧センサとしては、例えば実開平３−５２６７２号
公報に示されるような碍子兼用型の電圧センサを用いる
ことができる。As the voltage sensors VD1u to VD1w and VD5u to VD5w constituting the power supply side voltage sensor VD1 and the load side voltage sensor VD5, those having a structure in which a voltage dividing circuit is formed by an arrester can be used. As this type of voltage sensor, for example, an insulator-type voltage sensor as disclosed in Japanese Utility Model Application Laid-Open No. 3-52672 can be used.
【００１８】電圧センサＶＤ１ｕ〜ＶＤ１ｗ及びＶＤ５
ｕ〜ＶＤ５ｗにより検出した三相高圧配電線Ｕ，Ｖ，Ｗ
と大地との間の対地電圧は、断線検出装置ＤＤＵ１の一
部を構成するアナログ−デジタル変換器１０１に入力さ
れて、デジタル信号に変換される。実際には、アナログ
−デジタル変換器１０１は１周期分の各対地電圧を所定
の周期でサンプリングして、そのつどアナログの対地電
圧を演算可能なデジタル信号に変換して出力している。
なおこのアナログ−デジタル変換器１０１が、対地電圧
を演算可能な信号に変換する信号変換手段を構成する。Voltage sensors VD1u to VD1w and VD5
u-VD5w three-phase high voltage distribution line U, V, W
The ground voltage between the ground and the ground is input to the analog-digital converter 101 forming a part of the disconnection detection device DDU1 and converted into a digital signal. In reality, the analog-digital converter 101 samples each ground voltage for one cycle at a predetermined cycle, converts the analog ground voltage into a digital signal that can be calculated, and outputs the digital signal.
The analog-digital converter 101 constitutes signal conversion means for converting the ground voltage into a signal that can be calculated.
【００１９】アナログ−デジタル変換器１０１によって
デジタル信号に変換された対地電圧は、演算手段１０２
に入力される。演算手段１０２は、対地電圧を線間電圧
に変換するために、アナログ−デジタル変換器１０１か
ら出力される２つの相（例えばＵ相とＶ相）の相電圧
（Ｕｉ，Ｖｉ）について差演算を行って差電圧（ＵＶｉ
＝Ｕｉ−Ｖｉ）を求め，この差電圧について積和演算を
行って、線間電圧の実効値［＝｛Σ（ＵＶｉ）2 ／サン
プリング数｝1/2 ］を求める。演算手段１０２は、電源
側及び負荷側のそれぞれの相についての線間電圧の実効
値を演算し、記憶手段１０３にその演算結果を記憶させ
る。具体的には、サンプリング毎の瞬時値を記憶手段１
０３に記憶させるとともに、瞬時値の累積加算値から求
めた平均値も併せて記憶手段１０３に記憶させている。
各断線検出装置ＤＤＵ１…に記憶された線間電圧は、親
局に送信され、親局は各断線検出装置ＤＤＵ１…から収
集したデータを電算機に入力する。電算機では、このデ
ータから各開閉器間における電圧の降下状態を検知して
例えば電力用コンデンサを制御し、電圧の安定化を図る
ことができる。このように各断線検出装置ＤＤＵ１…で
線間電圧を検出できるように構成すると、高圧線の電圧
管理を簡単に行えるようになる。The ground voltage converted into a digital signal by the analog-digital converter 101 is the calculation means 102.
Entered in. The calculation means 102 performs a difference calculation on the phase voltages (Ui, Vi) of the two phases (for example, U phase and V phase) output from the analog-digital converter 101 in order to convert the ground voltage to the line voltage. Go to the difference voltage (UVi
= Ui-Vi), and the sum of products operation is performed on this difference voltage to obtain the effective value [= {Σ (UVi) 2 / sampling number} 1/2 ] of the line voltage. The calculation means 102 calculates the effective value of the line voltage for each phase on the power supply side and the load side, and stores the calculation result in the storage means 103. Specifically, the instantaneous value for each sampling is stored in the storage unit 1.
The average value obtained from the cumulative addition value of the instantaneous values is also stored in the storage means 103.
The line voltage stored in each disconnection detection device DDU1 ... Is transmitted to the master station, and the master station inputs the data collected from each disconnection detection device DDU1. The computer can detect the voltage drop state between the switches from this data and control the power capacitor, for example, to stabilize the voltage. In this way, if each disconnection detection device DDU1 ... Is configured to be able to detect the line voltage, voltage management of the high voltage line can be performed easily.
【００２０】演算手段１０２で演算した線間電圧の瞬時
値は、断線を判定する判定手段１０４に入力される。判
定手段１０４では、線間電圧が予め定めた基準電圧以下
になった場合に、断線が発生したと判断して、その結果
を記憶手段１０３に記憶させる。ちなみに正常時におけ
る線間電圧が６ｋＶであったとすると、基準電圧は４．
８ｋＶ程度に設定すればよい。また本実施例では、判定
手段１０４で停電からの復電も判定する。そのため判定
手段１０４には、停電状態から線間電圧が第２の基準電
圧を越えたか否かを判定する手段が含まれている。第２
の基準電圧は、例えば５．４ｋＶ程度に設定する。判定
手段１０４が復電を検出すると、判定手段１０４は記憶
手段１０３に記憶させた断線の検出結果をリセットす
る。これによって瞬時停電の発生を断線と誤って検出し
た場合における誤動作の発生を防止する。The instantaneous value of the line voltage calculated by the calculating means 102 is input to the judging means 104 for judging the disconnection. When the line voltage becomes equal to or lower than a predetermined reference voltage, the determination unit 104 determines that the disconnection has occurred and stores the result in the storage unit 103. By the way, if the line voltage in a normal state is 6 kV, the reference voltage is 4.
It may be set to about 8 kV. Further, in this embodiment, the determination unit 104 also determines the power recovery from the power failure. Therefore, the determination means 104 includes means for determining whether or not the line voltage exceeds the second reference voltage in the power failure state. Second
The reference voltage of is set to about 5.4 kV, for example. When the determination unit 104 detects the power recovery, the determination unit 104 resets the detection result of the disconnection stored in the storage unit 103. This prevents a malfunction from occurring when the occurrence of an instantaneous power failure is erroneously detected as a disconnection.
【００２１】尚本実施例において、アナログ−デジタル
変換器１０１、演算手段１０２、記憶手段１０３及び判
定手段１０４は、市販のマイクロコンピュータのＣＰＵ
によって構成される。図３は、マイクロコンピュータを
用いて各手段を構成する場合に用いるソフトウエアーの
アルゴリズムを示している。尚ステップＳＴ１では、ア
ナログ信号からデジタル信号への変換も行われる。また
ステップＳＴ２では、線間電圧の記憶手段への記憶も行
われる。さらにステップＳＴ５では、状変要求の有無の
判断の前に復電の判定を行い、復電していない場合にだ
け状変要求の有無を判定する。復電している場合にはス
テップＳＴ１へと戻る。In the present embodiment, the analog-digital converter 101, the arithmetic means 102, the storage means 103 and the determination means 104 are the CPU of a commercially available microcomputer.
Composed by. FIG. 3 shows an algorithm of software used when each means is configured by using a microcomputer. In step ST1, conversion from analog signal to digital signal is also performed. In step ST2, the line voltage is also stored in the storage means. Further, in step ST5, power recovery is determined before determining whether there is a status change request, and whether there is a status change request is determined only when power recovery is not performed. When the power is restored, the process returns to step ST1.
【００２２】本実施例において、電源装置は、変圧器Ｔ
Ｒ１またはＴＲ２の二次出力によってＣＰＵの動作電圧
を発生する電源部１０５と電源部１０５の出力により浮
動充電されて停電時の電源バックアップをするバックア
ップ電源部１０６とから構成される。バックアップ電源
部１０６は、電源部１０５の出力が停止した後、数十分
間、計測と通信処理とを維持できる程度の容量を有する
二次電池を備えている。本実施例では、受信部１０７及
び送信部１０８を子局との間の送受信に用いている。な
お受信部１０７及び送信部１０８が、断線検出装置ＤＤ
Ｕ１の送受信手段を構成している。なお本実施例では、
各断線検出装置を１つのユニットとして構成している。In this embodiment, the power supply device is a transformer T
It is composed of a power supply unit 105 that generates an operating voltage of the CPU by the secondary output of R1 or TR2, and a backup power supply unit 106 that is floatingly charged by the output of the power supply unit 105 and backs up the power supply when a power failure occurs. The backup power supply unit 106 includes a secondary battery having a capacity that can maintain measurement and communication processing for several tens of minutes after the output of the power supply unit 105 is stopped. In this embodiment, the receiving unit 107 and the transmitting unit 108 are used for transmission / reception with the slave station. The receiving unit 107 and the transmitting unit 108 are connected to the disconnection detecting device DD.
It constitutes the transmitting / receiving means of U1. In this example,
Each disconnection detection device is configured as one unit.
【００２３】次に上記実施例における断線区間の検出動
作について説明する。尚以下の説明では、三相の配電線
を単相と考えて説明する。図１のＡ点で断線が発生した
場合には、電源側電圧センサＶＤ２が断線を検出し、電
源側電圧センサＶＤ２より負荷側に位置する他の電圧セ
ンサも断線状態を検出し、また電圧センサＶＤ２よりも
負荷側に位置する変圧器計測端末ＴＭＵ４〜ＴＭＵ７は
停電状態を検出する。このとき電圧センサＶＤ２よりも
電源側で開閉器２に一番近い変圧器計測端末ＴＭＵ３の
出力は正常を示しているため、この変圧器計測端末ＴＭ
Ｕ３が接続されている配電線部分と開閉器２との間（Ａ
点）で断線が発生したことが判る。また電圧センサＶＤ
６は停電状態を検出していないが、変圧器計測端末ＴＭ
Ｕ４が停電状態を検出している場合には、変圧器計測端
末ＴＭＵ４が接続されている配電線部分と電圧センサＶ
Ｄ６との間（Ｂ点）で断線が発生したことが判る。Next, the operation of detecting the disconnection section in the above embodiment will be described. In the following description, a three-phase distribution line will be considered as a single phase. When a disconnection occurs at point A in FIG. 1, the power supply side voltage sensor VD2 detects the disconnection, the other voltage sensors located on the load side of the power supply side voltage sensor VD2 also detect the disconnection state, and the voltage sensor The transformer measurement terminals TMU4 to TMU7 located on the load side of VD2 detect a power failure state. At this time, since the output of the transformer measurement terminal TMU3 closest to the switch 2 on the power supply side of the voltage sensor VD2 indicates normal, this transformer measurement terminal TM
Between the distribution line part to which U3 is connected and the switch 2 (A
It can be seen that the disconnection occurred at the point). In addition, the voltage sensor VD
6 does not detect the power failure state, but transformer measuring terminal TM
When U4 detects the power failure state, the distribution line portion to which the transformer measurement terminal TMU4 is connected and the voltage sensor V
It can be seen that a disconnection occurred between D6 (point B).
【００２４】電源側で開閉器２に一番近い変圧器計測端
末ＴＭＵ３の出力が停電状態を検出していて、その変圧
器計測端末ＴＭＵ３よりも電源側に位置する変圧器計測
端末ＴＭＵ２で正常を示していれば、変圧器計測端末Ｔ
ＭＵ２とその後の変圧器計測端末ＴＭＵ３との間（Ｃ
点）で断線が発生していることが判る。また電圧センサ
ＶＤ２は断線の発生を検出していないが、電圧センサＶ
Ｄ６が断線の発生を検出している場合には、電圧センサ
ＶＤ２と電圧センサＶＤ６との間で断線が発生している
ことが判る。なお電圧センサＶＤ２と電圧センサＶＤ６
との間で断線が発生していると言っても、この場合には
電圧センサＶＤ２または電圧センサＶＤ６を配電線に接
続する接続線で断線が発生している場合と、電圧センサ
ＶＤ２または電圧センサＶＤ６が接続された配電線部分
と開閉器２の端子部との間に断線が発生している場合と
が含まれる。Ｄ点で断線が発生した場合には、開閉器３
に対して設けた電圧センサＶＤ３が断線の発生を検出
し、その他はＣ点での断線の発生と同様に断線位置の判
定が行われる。On the power supply side, the output of the transformer measurement terminal TMU3 closest to the switch 2 detects a power failure state, and the transformer measurement terminal TMU2 located on the power supply side of the transformer measurement terminal TMU3 confirms normal operation. If indicated, transformer measuring terminal T
Between MU2 and the transformer measuring terminal TMU3 thereafter (C
It can be seen that the disconnection occurs at the point). Although the voltage sensor VD2 does not detect the occurrence of disconnection, the voltage sensor VD2
When D6 detects the occurrence of the disconnection, it is understood that the disconnection has occurred between the voltage sensor VD2 and the voltage sensor VD6. The voltage sensor VD2 and the voltage sensor VD6
Even if it is said that a disconnection has occurred between the voltage sensor VD2 or the voltage sensor VD2 and the voltage sensor VD2 or the voltage sensor VD2 or the voltage sensor. This includes a case where a disconnection occurs between the distribution line portion to which the VD 6 is connected and the terminal portion of the switch 2. If disconnection occurs at point D, switch 3
The voltage sensor VD3 provided for the sensor detects the occurrence of the disconnection, and otherwise the determination of the disconnection position is performed in the same manner as the occurrence of the disconnection at the point C.
【００２５】親局を通して各断線検出装置と各変圧器計
測端末とから得たデータは断線箇所決定手段を構成する
電算機で処理され、電算機は所定の開閉器に親局を通し
て開指令を出力する。前述のＡ点及びＣ点で断線が発生
した場合には、開閉器１及び２に開指令が出力され、開
閉器１及び２の間の区間が配電系統から切り離される。
その後、常開接点を有する開閉器４の接点を閉じて、開
閉器２以降の配電線路に別の配電系統から電力を供給す
る。Ｂ点及びＤ点で断線が発生した場合には、開閉器２
及び３に開指令が出力される。Data obtained from each disconnection detecting device and each transformer measuring terminal through the master station is processed by a computer which constitutes disconnection point determining means, and the computer outputs an open command to a predetermined switch through the master station. To do. When disconnection occurs at points A and C described above, an open command is output to the switches 1 and 2, and the section between the switches 1 and 2 is disconnected from the power distribution system.
After that, the contact of the switch 4 having the normally open contact is closed, and power is supplied to the power distribution line after the switch 2 from another power distribution system. If disconnection occurs at points B and D, switch 2
An open command is output to 3 and 3.
【００２６】本発明では、前述のＡ点及びＢ点で断線が
発生した場合でも、断線位置を特定できるため、実際に
断線が発生している２つの開閉器の間の１区間だけを配
電系統から切り離しを行えばよい。なお１区間だけを配
電系統から切り離す目的のためだけであれば、変圧器計
測端末の出力を利用して、断線位置を特定する必要はな
い。図１のＡ点及びＣ点のいずれで断線が発生した場合
でも、電圧センサＶＤ５が断線を検出しておらず且つ電
圧センサＶＤ２が断線を検出していることが、断線検出
装置ＤＤＵ１及びＤＤＵ２の出力から判るため、切り離
す区間が開閉器１と開閉器２との間であることが特定で
きる。Ｄ点で断線が発生した場合には、同様にして開閉
器２と開閉器３との間の区間を切り離せばよいことが、
断線検出装置ＤＤＵ２及びＤＤＵ３の出力から特定でき
る。このように切り離し区間を特定するだけであれば、
断線検出装置の出力だけでもよいが、断線の発生位置を
更に細かく特定できれば、断線の修復に作業者が到着す
るまでの時間を大幅に短縮できて、復電までの時間の短
縮化を図ることができる。In the present invention, even if the disconnection occurs at the above-mentioned points A and B, the disconnection position can be specified. Therefore, only one section between the two switches in which the disconnection actually occurs occurs in the distribution system. It can be separated from. For the purpose of disconnecting only one section from the distribution system, it is not necessary to specify the disconnection position by using the output of the transformer measurement terminal. Even if the disconnection occurs at any of the points A and C in FIG. 1, the voltage sensor VD5 does not detect the disconnection and the voltage sensor VD2 detects the disconnection, which means that the disconnection detection devices DDU1 and DDU2 have Since it is known from the output, it can be specified that the section to be separated is between the switch 1 and the switch 2. If a disconnection occurs at point D, it is possible to similarly disconnect the section between the switch 2 and the switch 3,
It can be identified from the outputs of the disconnection detection devices DDU2 and DDU3. If you just specify the cut-off section like this,
Although only the output of the disconnection detection device is sufficient, if the location of the disconnection can be specified in more detail, the time required for the worker to repair the disconnection can be greatly shortened, and the time to restore power can be shortened. You can
【００２７】[0027]
【発明の効果】請求項１及び２の発明によれば、開閉器
と変圧器計測端末との間で断線が発生した場合でも、そ
の区間を正確に決定することができて、復電までの時間
を短縮化できる。According to the first and second aspects of the present invention, even if a disconnection occurs between the switch and the transformer measuring terminal, the section can be accurately determined, and the power is restored until the power is restored. The time can be shortened.
【００２８】請求項３の発明によれば、断線検出装置を
開閉器設置部にそれぞれ設けるため、断線検出装置の数
は開閉器の数と同じ数だけ必要になるものの、開閉器の
数が増減しても基本的には親局の構成を変える必要がな
く、柔軟性の高い配電系統システムを構築できる利点が
ある。According to the third aspect of the present invention, since the disconnection detection devices are provided in the switch installation portions respectively, the number of disconnection detection devices is the same as the number of switches, but the number of switches is increased or decreased. However, there is basically the advantage that it is not necessary to change the configuration of the master station and a highly flexible power distribution system system can be constructed.
【００２９】請求項４の発明によれば、判定結果を記憶
手段に記憶しておき、判定結果を親局からの送信指令に
応じて伝送することができるように断線検出装置を構成
するため、親局側の運転システムの構築が容易になる利
点がある。According to the fourth aspect of the invention, since the determination result is stored in the storage means and the disconnection detection device is configured so that the determination result can be transmitted according to the transmission command from the master station, There is an advantage that the operation system on the master station side can be easily constructed.
【００３０】請求項５の発明によれば、対地電圧を線間
電圧に変換して、これを記憶部に記憶するように断線検
出装置を構成するため、断線の判定だけでなく、高圧線
の電圧管理にも断線検出装置を用いることができる利点
がある。According to the fifth aspect of the present invention, since the disconnection detecting device is configured to convert the voltage to ground to the line voltage and store the voltage in the storage unit, not only the determination of the disconnection but also the detection of the high voltage line is performed. There is an advantage that the disconnection detection device can be used for voltage management.
【図１】本発明の方法を実施するための高圧配電線の系
統図である。FIG. 1 is a system diagram of a high-voltage distribution line for carrying out the method of the present invention.
【図２】開閉器、変圧器計測端末、電圧センサ及び断線
検出装置の関係と各部のより詳細な構成を示す図であ
る。FIG. 2 is a diagram showing a relationship between a switch, a transformer measurement terminal, a voltage sensor, and a disconnection detection device, and a more detailed configuration of each part.
【図３】断線検出装置をマイクロコンピュータを用いて
構成する場合に用いるソフトウエアーのアルゴリズムを
示すフローチャートである。FIG. 3 is a flowchart showing an algorithm of software used when the disconnection detection device is configured using a microcomputer.
【図４】従来の高圧配電線の断線箇所決定方法を説明す
るための図である。FIG. 4 is a diagram for explaining a conventional method for determining a disconnection point of a high-voltage distribution line.
ＴＲ１〜ＴＲ７ 配電用変圧器 ＴＭＵ１〜ＴＭＵ７ 変圧器計測端末 ＤＤＵ１〜ＤＤＵ４ 断線検出装置 ＶＤ１〜ＶＤ４ 電源側電圧センサ ＶＤ５〜ＶＤ８ 負荷側電圧センサ １〜４ 開閉器 １０１ アナログ−デジタル変換器 １０２ 演算手段 １０３ 記憶手段 １０４ 判定手段 １０５ 電源部 １０６ バックアップ電源部 １０７ 受信部 １０８ 送信部 TR1 to TR7 Distribution transformer TMU1 to TMU7 Transformer measurement terminal DDU1 to DDU4 disconnection detection device VD1 to VD4 Power supply side voltage sensor VD5-VD8 Load side voltage sensor 1-4 switch 101 analog-digital converter 102 computing means 103 storage means 104 determination means 105 power supply 106 Backup power supply unit 107 Receiver 108 transmitter
フロントページの続き (72)発明者 永野 浩文 福岡県福岡市中央区渡辺通二丁目１番82 号 九州電力株式会社内 (72)発明者 高木 繁 福岡県宗像郡福間町字汐井道2150番地の １ 九州変圧器株式会社内 (72)発明者 大石 時雄 福岡県宗像郡福間町字汐井道2150番地の １ 九州変圧器株式会社内 (72)発明者 渡邊 義介 福岡県宗像郡福間町字汐井道2150番地の １ 九州変圧器株式会社内 (56)参考文献 特開 平５−38044（ＪＰ，Ａ) 特開 平４−93670（ＪＰ，Ａ) 特開 平５−292657（ＪＰ，Ａ) 特開 平１−321819（ＪＰ，Ａ) 特開 平３−12567（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02H 7/26 H02H 13/00 G01R 31/08 (72) Inventor Hirofumi Nagano 1-282 Watanabe-dori, Chuo-ku, Fukuoka City, Fukuoka Prefecture Kyushu Electric Power Co., Inc. (72) Inventor Shigeru Takagi 1 of 2150 Shioido, Fukuma-cho, Munakata-gun, Fukuoka Prefecture Kyushu Transformer Co., Ltd. (72) Inventor Tokio Oishi 2150 Shioido, Fukuma-cho, Munakata-gun, Fukuoka Prefecture 1 Kyushu Transformer Co., Ltd. (72) Inventor Yoshisuke Watanabe 2150 Shioido, Fukuma-cho, Munakata-gun, Fukuoka Prefecture No. 1 in Kyushu Transformer Co., Ltd. (56) Reference JP-A-5-38044 (JP, A) JP-A-4-93670 (JP, A) JP-A-5-292657 (JP, A) JP-A-1 -321819 (JP, A) JP-A-3-12567 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) H02H 7/26 H02H 13/00 G01R 31/08
Claims (5)
された変圧器設置部が所定の距離をあけて配置され、前
記変圧器設置部間に開閉器が設置された開閉器設置部が
配置されてなる高電圧配線路における高圧配電線の断線
箇所を決定する方法であって、 前記開閉器の電源側配電線と大地との間の対地電圧を測
定する電源側電圧センサ及び前記開閉器の負荷側配電線
と大地との間の対地電圧を測定する負荷側電圧センサと
を前記開閉器設置部に設け、 前記電源側電圧センサ及び前記負荷側電圧センサの出力
から前記電源側配電線及び負荷側配電線のいずれ側で断
線が発生したかを断線検出装置により判定し、 前記断線検出装置の出力と前記変圧器計測端末の出力と
に基づいて断線箇所を決定することを特徴とする高圧配
電線の断線箇所決定方法。1. A transformer installation section in which a distribution transformer and a transformer measurement terminal are installed with a predetermined distance, and a switch installation section in which a switch is installed between the transformer installation sections. A method for determining a disconnection point of a high-voltage distribution line in a high-voltage wiring line that is arranged, the power-side voltage sensor for measuring a ground voltage between the power-side distribution line of the switch and the ground, and the switch. A load side voltage sensor that measures a ground voltage between the load side distribution line and the ground is provided in the switch installation portion, and the power supply side distribution line and the output from the power supply side voltage sensor and the load side voltage sensor are provided. It is determined by the disconnection detection device which side of the load side distribution line the disconnection has occurred, and the high voltage characterized by determining the disconnection point based on the output of the disconnection detection device and the output of the transformer measurement terminal. How to determine disconnection point of distribution line Law.
された変圧器設置部が所定の距離をあけて配置され、前
記変圧器設置部間に開閉器が設置された開閉器設置部が
配置されてなる高電圧配線路における高圧配電線の断線
箇所を決定する断線箇所決定装置であって、 前記開閉器設置部に設けられて前記開閉器の電源側配電
線と大地との間の対地電圧を測定する電源側電圧センサ
と、 前記開閉器設置部に設けられて前記開閉器の負荷側配電
線と大地との間の対地電圧を測定する負荷側電圧センサ
と、 前記電源側電圧センサ及び前記負荷側電圧センサの出力
から前記電源側配電線及び負荷側配電線のいずれ側で断
線が発生したかを判定する断線検出装置と、 前記断線検出装置の出力と前記変圧器計測端末の出力と
に基づいて断線箇所を決定する断線箇所決定手段とから
なる高圧配電線の断線箇所決定装置。2. A switch installation part in which a distribution transformer and a transformer measurement terminal are installed with a predetermined distance, and a switch installation part in which a switch is installed between the transformer installation parts. A disconnection point determining device for determining a disconnection point of a high-voltage distribution line in a high-voltage wiring path that is arranged, the disconnection point determination device being provided in the switch installation section and grounding between a power supply side distribution line of the switch and the ground. A power supply side voltage sensor for measuring a voltage, a load side voltage sensor provided in the switch installation section for measuring a ground voltage between the load side distribution line of the switch and the ground, the power supply side voltage sensor and A disconnection detection device for determining which side of the power supply side distribution line and the load side distribution line a disconnection has occurred from the output of the load side voltage sensor, an output of the disconnection detection device and an output of the transformer measurement terminal. Determine the disconnection point based on High-voltage distribution line disconnection point determination apparatus comprising a broken point determining means.
それぞれ設けられている請求項２に記載の高圧配電線の
断線箇所決定装置。3. The disconnection location determining device for a high-voltage distribution line according to claim 2, wherein the disconnection detection device is provided in each of the switch installation portions.
出した前記対地電圧を演算可能な信号に変換する信号変
換手段と、 前記信号変換手段の出力に基づいて断線の発生の有無を
判定する判定手段と、 前記判定手段の判定結果を記憶する記憶手段と、 前記記憶手段の記憶内容を送信指令に応じて親局に伝送
する送受信手段と、 停電時に電源となるバックアップ電源を含む電源装置と
からなる請求項３に記載の高圧配電線の断線箇所決定装
置。4. The disconnection detection device, based on an output of the signal conversion means, which converts the ground voltage detected by the voltage sensor on the power source side or the voltage sensor on the load side into a signal that can be calculated, Judgment means for judging the presence or absence of disconnection, storage means for storing the judgment result of the judgment means, transmission / reception means for transmitting the stored contents of the storage means to the master station in response to a transmission command, and power supply during a power failure The disconnection point determination device for a high-voltage distribution line according to claim 3, further comprising a power supply device including a backup power supply.
ジタル信号に変換するアナログ−デジタル変換器と前記
対地電圧を線間電圧に変換する演算手段とからなり、 前記記憶手段は前記演算手段で演算した線間電圧を記憶
する記憶部を備えている請求項４に記載の高圧配電線の
断線箇所決定装置。5. The signal conversion means comprises an analog-digital converter for converting the ground voltage to a digital signal and an arithmetic means for converting the ground voltage to a line voltage, and the storage means is the arithmetic means. The disconnection point determination device for a high-voltage distribution line according to claim 4, further comprising a storage unit that stores the calculated line voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04726994A JP3457990B2 (en) | 1994-03-17 | 1994-03-17 | Method and apparatus for determining disconnection point of high-voltage distribution line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04726994A JP3457990B2 (en) | 1994-03-17 | 1994-03-17 | Method and apparatus for determining disconnection point of high-voltage distribution line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07264773A JPH07264773A (en) | 1995-10-13 |
| JP3457990B2 true JP3457990B2 (en) | 2003-10-20 |
Family
ID=12770583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04726994A Expired - Lifetime JP3457990B2 (en) | 1994-03-17 | 1994-03-17 | Method and apparatus for determining disconnection point of high-voltage distribution line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3457990B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI102329B (en) * | 1997-02-06 | 1998-11-13 | Abb Transmit Oy | Switch to disconnect an electrical appliance from an electrical mains |
| JP2004053554A (en) * | 2002-07-24 | 2004-02-19 | Hitachi Ltd | Distribution line disconnection detection system |
| JP5119976B2 (en) * | 2008-02-27 | 2013-01-16 | 東京電力株式会社 | High voltage distribution line disconnection detection system, method and program |
| DE102011118954B4 (en) * | 2011-11-19 | 2013-07-04 | Volkswagen Aktiengesellschaft | Method and device for monitoring a high-voltage arrangement |
| JP6419492B2 (en) * | 2014-09-03 | 2018-11-07 | 関西電力株式会社 | Disconnection detection device, disconnection detection method, and disconnection section identification system |
| CN112751316B (en) * | 2020-12-31 | 2023-05-05 | 广东电网有限责任公司 | Configuration method and device for power failure of bus voltage transformer |
-
1994
- 1994-03-17 JP JP04726994A patent/JP3457990B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07264773A (en) | 1995-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6442493B1 (en) | Method of detecting a fault in a monitored section of an electric transmission line using distance protection techniques | |
| JP3457990B2 (en) | Method and apparatus for determining disconnection point of high-voltage distribution line | |
| JP3457989B2 (en) | How to disconnect high-voltage distribution lines | |
| JP2001186617A (en) | Monitoring system for transmission line | |
| JP3172845B2 (en) | Method and apparatus for predicting the life of a segmented switch | |
| JP3299926B2 (en) | Power distribution equipment information transmission device | |
| JP3575814B2 (en) | Power system fault location system | |
| JP3160612B2 (en) | Power system insulation deterioration detection method and apparatus | |
| JP2969905B2 (en) | Fault detection device for distribution line | |
| CN116106689B (en) | Method, device, equipment and medium for detecting cable faults of power distribution network | |
| JPS59203967A (en) | Detection system for wire breaking of ungrounded system distribution line | |
| JPH1082819A (en) | Earth detecting device | |
| JP3141806B2 (en) | Automatic distribution line switchgear | |
| JP2558350B2 (en) | How to disconnect the faulty section of the distribution line | |
| JPH04145829A (en) | Detector for fault section of distribution line | |
| JPH07318607A (en) | Method for detection of point of short circuit accident of distribution line | |
| JP3221342B2 (en) | Automatic distribution line switchgear | |
| JP3558313B2 (en) | Current differential relay | |
| JPH11178200A (en) | Power distribution system | |
| JP3141807B2 (en) | Automatic distribution line switchgear | |
| JP2971410B2 (en) | Substation equipment fault location detector | |
| JP2814793B2 (en) | Remote monitoring and control system for distribution line protection equipment | |
| JPH10145962A (en) | Outage section locator in substation | |
| JPH1141783A (en) | Power system controller | |
| CN117638791A (en) | Power line control method and device and power system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20030708 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313532 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080801 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080801 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090801 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100801 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110801 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120801 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120801 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130801 Year of fee payment: 10 |
|
| EXPY | Cancellation because of completion of term |