JPS6325567A - Optical type partial discharge detector - Google Patents

Optical type partial discharge detector

Info

Publication number
JPS6325567A
JPS6325567A JP61166630A JP16663086A JPS6325567A JP S6325567 A JPS6325567 A JP S6325567A JP 61166630 A JP61166630 A JP 61166630A JP 16663086 A JP16663086 A JP 16663086A JP S6325567 A JPS6325567 A JP S6325567A
Authority
JP
Japan
Prior art keywords
optical
transformer
partial discharge
line
voltage
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.)
Pending
Application number
JP61166630A
Other languages
Japanese (ja)
Inventor
Satoshi Matsumoto
聡 松本
Hirokuni Aoyanagi
青柳 浩邦
Hitoshi Okubo
仁 大久保
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP61166630A priority Critical patent/JPS6325567A/en
Publication of JPS6325567A publication Critical patent/JPS6325567A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To dispense with a battery while facilitating maintenance, by providing a power source circuit at a secondary-side output of a transformer mounted on a high voltage line to supply an output thereof to an electro-optical transducer. CONSTITUTION:A high voltage line 1 contains current due to a partial discharging besides a normal load current. A detection impedance 2 for detecting this partial discharging is adapted to generate a potential difference thereacross with the electrical energization thereof and the potential difference is converted with an electro-optical transducer 3 into an optical signal from an electrical signal. An optical fiber cable 4 introduces the optical signal to the ground side with the line 1 electrically insulated. On the other had, the primary side 51 of a transformer 5 is connected in series to the line 1 while a power source circuit 6 composed of a rectification circuit and a voltage stabilizing circuit is connected to the secondary side 52 thereof. Then, as a load current flows through a bus 1 in the transformer 5, a voltage proportional to the winding ratio appears on the secondary side 52 thereof. A DC voltage is obtained by rectifying and stabilizing the output and inputted into the electro-optical transformer 3 thereby enabling the supply of electric energy.

Description

【発明の詳細な説明】 C発明の目的〕 (産業上の利用分野) 本発明は高電圧機器等において発生する部分放電の検出
器に関し、特に光ファイバーを用いた光方式部分放電検
出器の電源に関する。
Detailed Description of the Invention CObject of the Invention (Industrial Application Field) The present invention relates to a detector for partial discharge generated in high-voltage equipment, etc., and particularly relates to a power source for an optical partial discharge detector using an optical fiber. .

(従来の技術) 高電圧機器等において、使用する絶縁物に高電圧を印加
すると、何らかの原因例えば絶縁物の劣化や不良、不純
物の混入等により部分放電が発生する。
(Prior Art) When a high voltage is applied to an insulator used in a high-voltage device, partial discharge occurs due to some reason, such as deterioration or defect in the insulator, inclusion of impurities, etc.

従来こうした部分放電を検出するための方法として例え
ば電気学会発行の「!@縁試験法ハンドブックJ  (
P230昭55)に示されているように種々の測定法が
知られている。
Conventional methods for detecting such partial discharges include, for example, the "!@Edge Test Method Handbook J" published by the Institute of Electrical Engineers of Japan.
Various measurement methods are known, as shown in P. 230 (1983).

しかしながら、これらの測定法はいずれも接地側に検出
インピーダンスを設けるものであり、このため出力信号
は外部ノイズや充電電流の影響さらには他相回路からの
誘導等の影響を受けるためにS/N比の低いものとなら
ざるを得なかった。
However, in all of these measurement methods, a detection impedance is provided on the ground side, so the output signal is affected by external noise, charging current, and induction from other phase circuits, so the S/N is low. The ratio had to be low.

また、測定は、接地側で行なう必要があるため測定器を
挿入できる箇所はおのずと接地線につながる箇所に限ら
れるといった欠点があった。
Furthermore, since the measurement must be performed on the ground side, there is a drawback that the places where the measuring device can be inserted are naturally limited to the places connected to the ground wire.

(発明が解決しようとする問題点) こうした問題を解決するための一方法として、高圧側に
流れる電流を測定する方法がある。この方法は、測定器
を高電圧導体に直接取り付けるため、測定線は、電気的
に絶縁する必要がある。こうした要求に応える具体例と
して光ファイバーを信号伝送線路として用いる光方式部
分放電検出器がある。これは電気信号を光信号に変換す
る変換器を用いて、高電圧線路に取り付けられた検出イ
ンピーダンスの出力電圧を光信号に変換し、部分放電の
測定を行なうものである。
(Problems to be Solved by the Invention) One method for solving these problems is to measure the current flowing to the high voltage side. Since this method attaches the measuring instrument directly to the high-voltage conductor, the measuring wire must be electrically insulated. A specific example of meeting these demands is an optical partial discharge detector that uses an optical fiber as a signal transmission line. This uses a converter that converts electrical signals into optical signals to convert the output voltage of a detection impedance attached to a high voltage line into an optical signal, and measures partial discharge.

しかしながらこの方法では電気/光変換器を動作させる
ために電源として、何らかの形で電気エネルギーを供給
する必要がある。たとえば、バッテリーや電気的に絶縁
された発電機等を用いる方法がある。しかしながら、こ
れらを電源として用いるためには、バッテリーのメイン
テナンスや発電機の保守、スイッチの入切等のため、送
電を止める必要があった。また長期的な使用に際しても
上記の理由によりメインテナンスが必要不可欠なものと
ならざるを得なかった。
However, in this method, it is necessary to supply electrical energy in some form as a power source in order to operate the electrical/optical converter. For example, there is a method using a battery or an electrically insulated generator. However, in order to use these as a power source, it was necessary to stop power transmission for battery maintenance, generator maintenance, switching on/off, etc. Furthermore, even during long-term use, maintenance has become indispensable for the above reasons.

本発明は、上述したように高圧側線路で電気/光変換器
を用いて測定を行なう場合に、電気/光変換器が必要と
する電源をメインテナンスを不要として供給しようとす
ることを目的とする。
An object of the present invention is to supply the power required by the electrical/optical converter without requiring maintenance when performing measurements using the electrical/optical converter on the high-voltage side line as described above. .

〔発明の構成〕[Structure of the invention]

(問題点を解決するための手段) 以上の目的を達するために、高電圧線路に変圧器を取り
付け、この二次側出力に整流回路及び安定化回路から成
る電源回路を取り付け、この出力を電気/光変換器に供
給するよう構成することを特徴とする。
(Means for solving the problem) In order to achieve the above objectives, a transformer is attached to the high voltage line, a power supply circuit consisting of a rectifier circuit and a stabilizing circuit is attached to the secondary output of this transformer, and this output is converted into electricity. / A light converter.

(作用) 電源回路を内蔵することにより従来、電源として必要で
あったバッテリーあるいは、発電機を不要とすることが
できる。
(Function) By incorporating the power supply circuit, it is possible to eliminate the need for a battery or a generator, which were conventionally required as a power supply.

(実施例) 以下図面を用いて本発明の一実施例を説明する。(Example) An embodiment of the present invention will be described below with reference to the drawings.

(実施例の構成) 第1図は本発明の一実施例を示す図である。第1図にお
いて、1は高電圧が印加されている線路を示し、この高
電圧線路1には、通常の負荷電流の外に電気絶縁物や電
極等に発生する部分放電による電流が含まれている。2
は部分放電を検出するための検出インピーダンスを示し
、通電によってこの両端に生ずる電位差を電気/光変換
器3により電気信号から光信号に変換する。また光信号
は、光フアイバーケーブル4を通して接地側に設けられ
た測定系に導く。ここで光フアイバーケーブル4は、高
電圧線路上を電気的に絶縁した状態で光信号を接地側に
導くことができる6一方、高電圧線路1には、変圧器5
の一次側51が直列に接続され、この変圧器5の二次側
52には整流回路および電圧安定化回路から成る電源回
路6が接続されこの出力は、電気/光変換器3の電源と
して接続されている。
(Configuration of Embodiment) FIG. 1 is a diagram showing an embodiment of the present invention. In Figure 1, 1 indicates a line to which high voltage is applied, and this high voltage line 1 includes current due to partial discharge generated in electrical insulators, electrodes, etc. in addition to normal load current. There is. 2
indicates a detection impedance for detecting a partial discharge, and the potential difference generated between the two ends by energization is converted from an electrical signal to an optical signal by the electrical/optical converter 3. Further, the optical signal is guided through the optical fiber cable 4 to a measurement system provided on the ground side. Here, the optical fiber cable 4 can guide optical signals to the ground side while electrically insulating the high voltage line 6. On the other hand, the high voltage line 1 is connected to a transformer 5.
The primary side 51 is connected in series, and the secondary side 52 of this transformer 5 is connected to a power supply circuit 6 consisting of a rectifier circuit and a voltage stabilization circuit, and this output is connected as a power source for the electrical/optical converter 3. has been done.

(実施例の作用) 変圧器5は、高電圧母線1に電圧が印加され負荷電流が
流れると、−次側と二次側の巻数比に比例した電圧が二
次側52に表われる。この出力を整流、安定化させるこ
とにより直流電圧を得ることができる。これを電気/光
度圧器3に入力することにより電気エネルギーを供給す
ることができる。
(Operation of the embodiment) In the transformer 5, when a voltage is applied to the high voltage bus 1 and a load current flows, a voltage proportional to the turns ratio between the negative side and the secondary side appears on the secondary side 52. By rectifying and stabilizing this output, a DC voltage can be obtained. Electrical energy can be supplied by inputting this to the electric/photometric pressure meter 3.

(実施例の効果) 以上の構成とすることにより高電圧が印加される線路に
流れる部分放電による信号を電気/光変換器を介してメ
インテナンスを不要にして、連続的に測定することが可
能となる。
(Effects of Example) With the above configuration, it is possible to continuously measure signals caused by partial discharge flowing in a line to which high voltage is applied via an electrical/optical converter without requiring maintenance. Become.

(他の実施例) 第2図は、本発明による光方式部分放電検出器をガス絶
縁開閉装置に応用した一例を示している第4図において
10.11は、高電圧導体を示すが、高電圧導体の一部
を第2図16に示す様にコイル状とすることによりイン
ダクタンスを形成し、これによりバイパスフィルターま
たは同調型インピーダンスを形成させることができる。
(Other Examples) Figure 2 shows an example in which the optical partial discharge detector according to the present invention is applied to a gas-insulated switchgear. In Figure 4, 10.11 indicates a high voltage conductor. By forming a portion of the voltage conductor into a coil shape as shown in FIG. 2, an inductance can be formed, thereby forming a bypass filter or a tuned impedance.

尚、本測定装置は、検出インピーダンスを変流器と置き
換えることにより光変流器としても使える。
Note that this measuring device can also be used as an optical current transformer by replacing the detection impedance with a current transformer.

〔発明の効果〕〔Effect of the invention〕

以上述べた様に、高電圧線路に変圧器を挿入しこれを利
用して電圧/光変換器を動作させるに必要な電源を確保
することにより、バッテリーが不要となりメインテナン
スが極めて容易になると共に、検出感度の高い光方式部
分放電検出器が提供できる。
As mentioned above, by inserting a transformer into the high voltage line and using it to secure the power necessary to operate the voltage/optical converter, batteries are not required and maintenance becomes extremely easy. An optical partial discharge detector with high detection sensitivity can be provided.

特に1部分放電監視装置の様に電源を遮断することが極
めて回連であり、かつ長期に亘って部分放電を調査する
場合には、極めて有効である。また、ガス絶縁開閉装置
の様に、−度組み込んだら分解点検に多大のコストを要
するものに対しても本装置は、メインテナンスフリーの
機器として取付けることが可能である。
Particularly, it is extremely effective in the case of a partial discharge monitoring device in which the power supply has to be shut off frequently and partial discharges are to be investigated over a long period of time. Furthermore, the present device can be installed as a maintenance-free device even in devices such as gas-insulated switchgears that require a great deal of cost to disassemble and inspect once installed.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例を示す図、第2図は本発明に
よる装置をガス絶縁開閉装置へ応用した例を示す図であ
る。 1・・・高電圧線路  2・・・検出インピーダンス3
・・・電気/光変換器 4・・・光フアイバーケーブル  5・・・変圧器6・
・・電源回路    10・・・高電圧導体11・・・
高電圧導体   12・・・シース13・・・スペーサ
    14・・・SFGガス15・・・電源回路内蔵
電気/光変換器16・・・コイル 代理人 弁理士 則 近 憲 佑 同  王侯弘文 第1図 第2図
FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing an example in which the device according to the present invention is applied to a gas-insulated switchgear. 1... High voltage line 2... Detection impedance 3
...Electrical/optical converter 4...Fiber optic cable 5...Transformer 6.
...Power supply circuit 10...High voltage conductor 11...
High voltage conductor 12...Sheath 13...Spacer 14...SFG gas 15...Electrical/optical converter with built-in power supply circuit 16...Coil agent Patent attorney Nori Chika Ken Yudo Wang Hou HongbunFigure 1 Figure 2

Claims (2)

【特許請求の範囲】[Claims] (1)高電圧が印加される導体またはリード線に部分放
電を検出するための検出インピーダンスを設け、この両
端の電圧を電気/光変換器を通して測定する光方式部分
放電検出器において、電気/光変換器に接続される電源
は前記導体またはリード線に取り付けた変圧器であるこ
とを特徴とする光方式部分放電検出器。
(1) In an optical partial discharge detector, a detection impedance for detecting partial discharge is provided on a conductor or lead wire to which a high voltage is applied, and the voltage at both ends is measured through an electric/optical converter. An optical partial discharge detector characterized in that a power source connected to the converter is a transformer attached to the conductor or lead wire.
(2)検出インピーダンスは導体またはリード線自体に
形成されたコイルであることを特徴とする特許請求の範
囲第1項記載の光方式部分放電検出器。
(2) The optical partial discharge detector according to claim 1, wherein the detection impedance is a coil formed on the conductor or the lead wire itself.
JP61166630A 1986-07-17 1986-07-17 Optical type partial discharge detector Pending JPS6325567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61166630A JPS6325567A (en) 1986-07-17 1986-07-17 Optical type partial discharge detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61166630A JPS6325567A (en) 1986-07-17 1986-07-17 Optical type partial discharge detector

Publications (1)

Publication Number Publication Date
JPS6325567A true JPS6325567A (en) 1988-02-03

Family

ID=15834846

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61166630A Pending JPS6325567A (en) 1986-07-17 1986-07-17 Optical type partial discharge detector

Country Status (1)

Country Link
JP (1) JPS6325567A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1321325C (en) * 2002-06-19 2007-06-13 吴伟 High tension current detecting method and device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1321325C (en) * 2002-06-19 2007-06-13 吴伟 High tension current detecting method and device

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