JPH0499970A - Detecting apparatus for partial discharge pulse - Google Patents
Detecting apparatus for partial discharge pulseInfo
- Publication number
- JPH0499970A JPH0499970A JP2217076A JP21707690A JPH0499970A JP H0499970 A JPH0499970 A JP H0499970A JP 2217076 A JP2217076 A JP 2217076A JP 21707690 A JP21707690 A JP 21707690A JP H0499970 A JPH0499970 A JP H0499970A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- partial discharge
- detector
- current
- cable
- 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
Links
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 239000013307 optical fiber Substances 0.000 claims abstract description 13
- 230000035699 permeability Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 abstract description 19
- 230000006866 deterioration Effects 0.000 abstract description 17
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 2
- 230000010287 polarization Effects 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は課題状態のまま電気機器の部分放電パルスを検
出できる装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a device capable of detecting partial discharge pulses in electrical equipment while in a problem state.
（従来の技術）
回転電機の異常、特に固定子巻線の劣化を判定するため
に従来から回転電機を停止した後、巻線に高圧を印加し
電気諸特性（絶縁抵抗、交流電流、誘電体損失角、部分
放電等）を測定して巻線絶縁物の劣化度を判定する方法
と、打音による絶縁物の機械的損傷や巻線固定力劣化を
判定する機械的な方法が用いられてきた。これらの劣化
判定を行うには回転電機の停止、線路の切り離し、場合
によっては回転子抜き取りなどの作業を要し、絶縁劣化
判定のために多大な時間、労力、費用が必要になり、頻
繁な劣化判定を実施することが困難となり、劣化が急速
に進行するような場合には、十分な対応ができないこ゛
ともあった。(Conventional technology) Conventionally, in order to determine abnormalities in a rotating electric machine, especially deterioration of the stator windings, after stopping the rotating electric machine, high voltage is applied to the windings and various electrical characteristics (insulation resistance, alternating current, dielectric Two methods are used: one is to measure the degree of deterioration of the winding insulation (loss angle, partial discharge, etc.), and the other is a mechanical method to determine mechanical damage to the insulation due to hammering noise and deterioration of the winding fixing force. Ta. In order to determine these deterioration conditions, it is necessary to stop the rotating electric machine, disconnect the line, and in some cases remove the rotor. Therefore, determining insulation deterioration requires a great deal of time, effort, and cost, and requires frequent work. It has become difficult to carry out deterioration judgments, and in cases where deterioration progresses rapidly, it may not be possible to take adequate measures.
この欠点を取り除くため、回転電機の運転中に部分放電
測定を行う検出装置（実開昭６Ｏ−１５８１６７）が実
用化され、測定された部分放電パルス（放電電荷量（ｑ
））が電源電圧位相（ΦＶ）のどの位相に発生している
かを解析（以下ｑ−ΦＶ解析と称する）する絶縁物の劣
化判定技術（特開昭５８−１５３ ］、８３号公報、特
開昭６０−２０３８６６号公報）も実用化されている。In order to eliminate this drawback, a detection device (Utility Model Application No. 6O-158167) was put into practical use that measures partial discharge during the operation of a rotating electric machine, and the measured partial discharge pulse (discharge charge amount (q
)) occurs in which phase of the power supply voltage phase (ΦV) (hereinafter referred to as q-ΦV analysis), an insulator deterioration determination technology (Japanese Patent Application Laid-Open No. 58-153], No. 83, JP-A No. 83) 1986-203866) has also been put into practical use.
このような方法は前述の欠点を取り除く以外に、運転中
の巻線の状態を監視できると言われている。Such a method is said to be able to monitor the condition of the windings during operation, in addition to eliminating the above-mentioned drawbacks.
特に運転中に発生する振動で巻線の固定力が劣化すると
、巻線も単独で振動するので、スロットと巻線間に空隙
が生じ部分放電パルス（以下スロット放電と称する）が
発生する。このスロット放電を検出することで巻線の固
定力劣化が判定できるのである。In particular, when the fixing force of the winding deteriorates due to vibrations generated during operation, the winding also vibrates independently, creating a gap between the slot and the winding and generating a partial discharge pulse (hereinafter referred to as slot discharge). By detecting this slot discharge, deterioration in the fixing force of the winding can be determined.
しかしながら、電源電圧位相検出と部分放電測定で行う
ｑ−ΦＶ解析では、上記の巻線の固定力劣化を精度よく
短時間で判定することができなかった。なぜなら、巻線
の振動は巻線に流れる電流が発生する電磁力で定まる。However, in the q-ΦV analysis performed by power supply voltage phase detection and partial discharge measurement, it was not possible to accurately determine the deterioration of the fixing force of the winding in a short time. This is because the vibration of the winding is determined by the electromagnetic force generated by the current flowing through the winding.
電磁力は電流の２乗に比例する。したがって、上記の方
法より電源電流位相を検出し電源電流位相と部分放電量
の関係を解析した方が巻線の固定力劣化を精度よく判定
できていた。Electromagnetic force is proportional to the square of the current. Therefore, by detecting the power supply current phase and analyzing the relationship between the power supply current phase and the amount of partial discharge using the method described above, deterioration in the fixing force of the winding could be determined more accurately.
（発明が解決しようとする課題）
上記のように、従来技術の欠点は、電源電圧位相の検出
と部分放電測定検出では、電流によって定まる電磁力で
振動する巻線とスロット間で生ずるスロット放電を精度
よく識別のため巻線の固定力劣化の判定ができないこと
であった。(Problems to be Solved by the Invention) As mentioned above, the drawback of the prior art is that the power supply voltage phase detection and partial discharge measurement detection cannot detect the slot discharge that occurs between the slot and the winding that vibrates due to the electromagnetic force determined by the current. Due to accurate identification, it was not possible to determine whether the fixing force of the winding had deteriorated.
従って、本発明は上記課題を解決し、回転電機固定子巻
線の固定力劣化の判定に必要な部分放電パルスと電源電
流位相を容易に検出できる部分放電パルス検出装置の提
供を目的とする。Therefore, it is an object of the present invention to solve the above problems and provide a partial discharge pulse detection device that can easily detect partial discharge pulses and power supply current phases necessary for determining the deterioration of the fixing force of a stator winding of a rotating electric machine.
（課題を解決するための手段）
上記目的を達成するため本発明の部分放電パルス検出装
置は、電力ケーブルが貫通する高磁透率のトロイダルコ
アと、このトロイダルコアに巻付けられ電流検出器に接
続された検出コイルと、前記電力ケーブルの近傍に配置
され光−電気変換器に接続された光フィイバ磁界検出器
と、前記電流検出器に部分放電電気信号入力回路を介し
て接続され、かつ前記光−電気変換器に接続された部分
放電測定器とを備えた構成とする。(Means for Solving the Problems) In order to achieve the above object, the partial discharge pulse detection device of the present invention includes a toroidal core with high magnetic permeability through which a power cable passes, and a current detector wound around the toroidal core. an optical fiber magnetic field detector disposed near the power cable and connected to the opto-electrical converter; and a fiber optic magnetic field detector connected to the current detector via a partial discharge electric signal input circuit, and the The structure includes a partial discharge measuring device connected to an optical-to-electrical converter.
（作用）
本発明の部分放電パルス検出装置によれば、電気機器の
端子などの導体に部分放電パルス検出装置を接続するこ
となく、導体被覆の上から検出コイルによって部分放電
の電気信号を、また、電力ケーブルに流れる電流で発生
する磁界を光ファイバ磁界検出器で電源電流位相を検出
できる。(Function) According to the partial discharge pulse detection device of the present invention, the electric signal of partial discharge can be detected by the detection coil from above the conductor coating without connecting the partial discharge pulse detection device to a conductor such as a terminal of an electric device. , the phase of the power supply current can be detected by using an optical fiber magnetic field detector to detect the magnetic field generated by the current flowing through the power cable.
（実施例）
以下本発明について第１図および第２図に示す一実施例
をもとに説明する。本実施例の部分放電パルス検出装置
は、回転電機の電力ケーブル１が貫通する高透磁率のト
ロイダルコア２と、そのトロイダルコア２に巻付けられ
た検出コイル３と、この検出コイル３に接続された電流
検出器４と、光ファイバ磁界検出器５から成る。検出コ
イル３は部分放電電気信号入力回路６を、また、光ファ
イバ磁界検出器５は光−電気変換器７を介してそれぞれ
部分放電測定器８に接続されている。(Example) The present invention will be described below based on an example shown in FIGS. 1 and 2. The partial discharge pulse detection device of this embodiment includes a toroidal core 2 of high magnetic permeability through which a power cable 1 of a rotating electric machine passes, a detection coil 3 wound around the toroidal core 2, and a detection coil 3 connected to the detection coil 3. It consists of a current detector 4 and an optical fiber magnetic field detector 5. The detection coil 3 is connected to a partial discharge electric signal input circuit 6, and the optical fiber magnetic field detector 5 is connected to a partial discharge measuring device 8 via an optical-electrical converter 7.
トロイダルコア２は透磁率が２１００ （Ｈ／ｍ）でか
つ高周波領域までその透磁率が一定であるＴＤＫ（株）
社製フェライトコアＰＥ−１を使用し、光ファイバ磁界
検出器５は、第２図のようにファラデー素子９、検光子
１０、ミラーＩＩ、偏光子１２で構成する。The toroidal core 2 is manufactured by TDK Corporation and has a magnetic permeability of 2100 (H/m), which remains constant up to the high frequency range.
The optical fiber magnetic field detector 5 is composed of a Faraday element 9, an analyzer 10, a mirror II, and a polarizer 12, as shown in FIG.
このように構成することによりトロイダルコア２に回転
電機の電力ケーブル１を通すだけで、部分放電信号であ
る高周波パルス信号を検出できる。With this configuration, a high frequency pulse signal, which is a partial discharge signal, can be detected simply by passing the power cable 1 of the rotating electric machine through the toroidal core 2.
また、光ファイバ磁界検出器５はファラデー素子９を主
体としたので、偏光子１２を通過した直線偏光波はファ
ラデー素子９内を伝搬する間に電力ケーブル１に流れる
電流で発生する磁界によって偏光面が回転し、その回転
角に応じて検光子ｌＯによって光強度に変換する。光−
電気変換器７で、光強度を電気的処理し電圧に変換して
電力ケーブル１の磁界が検出でき、電力ケーブル１の電
流および電流位相が検出できる。Furthermore, since the optical fiber magnetic field detector 5 mainly includes a Faraday element 9, the linearly polarized light wave that has passed through the polarizer 12 is polarized due to the magnetic field generated by the current flowing through the power cable 1 while propagating within the Faraday element 9. rotates, and the analyzer lO converts it into light intensity according to the rotation angle. light-
The electrical converter 7 electrically processes the light intensity and converts it into a voltage so that the magnetic field of the power cable 1 can be detected, and the current and current phase of the power cable 1 can be detected.
検出コイル３、光ファイバ磁界検出器５は、いずれも電
力ケーブル１の被覆の上から電流が検出できるため、回
転電機の端子や線路等の導体に検出器を接続しなくても
回転電機巻線の絶縁や固定力の劣化の検知に必要な部分
放電の情報を精度よく検出できる。Both the detection coil 3 and the optical fiber magnetic field detector 5 can detect current from above the sheath of the power cable 1, so the detection coil 3 and the optical fiber magnetic field detector 5 can detect the windings of the rotating electrical machine without having to connect the detector to a conductor such as a terminal or line of the rotating electrical machine. It is possible to accurately detect partial discharge information necessary for detecting deterioration of insulation and fixing force.
また、トロイダルコア２は円形にかぎらず楕円形、角形
であっても同様な動作を得ることができる。更にはトロ
イダルコア２を、例えば円形を１／２に切断したＵ字形
とし、切断面相互を合わせて使用する。このような２分
割トロイダルコアは回転電機を一時停止することなく電
力ケーブル１をトロイダルコア２の中に通す作業が容易
にできる。Further, the toroidal core 2 is not limited to a circular shape, and even if it is oval or square, the same operation can be obtained. Furthermore, the toroidal core 2 is made into a U-shape, for example, by cutting a circle into 1/2, and the cut surfaces are aligned with each other. Such a two-part toroidal core allows the power cable 1 to be easily passed through the toroidal core 2 without temporarily stopping the rotating electric machine.
以上説明したように本発明によれば、対象機の線路の電
流位相を、線路に接続することなく検出でき、回転電機
の停止無しに検出装置を取り付けることができ、通常運
転時に巻線の振動等により発生するスロット放電を精度
よく測定できるため、運転中の電気機器の絶縁劣化や固
定力劣化の診断が容易にできる。As explained above, according to the present invention, the current phase of the line of the target machine can be detected without being connected to the line, the detection device can be installed without stopping the rotating electric machine, and the winding vibration during normal operation can be detected. Since the slot discharge caused by such factors can be measured with high accuracy, it is possible to easily diagnose insulation deterioration and fixing force deterioration of electrical equipment during operation.
第１図は本発明の一実施例の部分放電パルス検出装置を
示す斜視図、第２図は本発明に係る光ファイバ磁界検出
器を示す斜視図である。
１・・・電力ケーブル ２・・トロイダルコア３・
・・検出コイル ４・・・電流検出器５・・・光
ファイバ磁界検出器
６・・・部分放電電気信号入力回路
７・・・光−電気変換器 ８・・・部分放電測定器９
・・・ファラデー素子 １０・・・検光子１１・・・
ミラー １２・・・偏光子代理人 弁理士
則 近 憲 佑
（イ）FIG. 1 is a perspective view showing a partial discharge pulse detection device according to an embodiment of the present invention, and FIG. 2 is a perspective view showing an optical fiber magnetic field detector according to the present invention. 1... Power cable 2... Toroidal core 3...
...Detection coil 4...Current detector 5...Optical fiber magnetic field detector 6...Partial discharge electrical signal input circuit 7...Optical-electrical converter 8...Partial discharge measuring device 9
...Faraday element 10...Analyzer 11...
Mirror 12...Polarizer agent Patent attorney
Noriyuki Noriyuki (I)
Claims (1)
、このトロイダルコアに巻付けられ電流検出器に接続さ
れた検出コイルと、前記電力ケーブルの近傍に配置され
光−電気変換器に接続された光ファイバ磁界検出器と、
前記電流検出器に部分放電電気信号入力回路を介して接
続され、かつ前記光−電気変換器に接続された部分放電
測定器とを備えたことを特徴とする部分放電パルス検出
装置。A toroidal core with high magnetic permeability through which a power cable passes, a detection coil wound around the toroidal core and connected to a current detector, and an optical fiber arranged near the power cable and connected to an optical-to-electrical converter. a magnetic field detector;
A partial discharge pulse detection device comprising: a partial discharge measuring device connected to the current detector via a partial discharge electrical signal input circuit and connected to the optical-to-electrical converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2217076A JPH0499970A (en) | 1990-08-20 | 1990-08-20 | Detecting apparatus for partial discharge pulse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2217076A JPH0499970A (en) | 1990-08-20 | 1990-08-20 | Detecting apparatus for partial discharge pulse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0499970A true JPH0499970A (en) | 1992-03-31 |
Family
ID=16698458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2217076A Pending JPH0499970A (en) | 1990-08-20 | 1990-08-20 | Detecting apparatus for partial discharge pulse |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0499970A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06261008A (en) * | 1993-03-04 | 1994-09-16 | Sekiyu Kodan | Signal transmission system |
| CN108646152A (en) * | 2018-05-11 | 2018-10-12 | 哈动国家水力发电设备工程技术研究中心有限公司 | A kind of method of polarization/depolarization current method check and evaluation stator bar insulation ag(e)ing state |
| CN111352049A (en) * | 2020-04-21 | 2020-06-30 | 中国科学院合肥物质科学研究院 | Cable electricity core inspection robot |
| JP2021056050A (en) * | 2019-09-27 | 2021-04-08 | Ｊｆｅスチール株式会社 | Insulator deterioration diagnostic device and insulator deterioration diagnostic method for electric rotary machine |
-
1990
- 1990-08-20 JP JP2217076A patent/JPH0499970A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06261008A (en) * | 1993-03-04 | 1994-09-16 | Sekiyu Kodan | Signal transmission system |
| CN108646152A (en) * | 2018-05-11 | 2018-10-12 | 哈动国家水力发电设备工程技术研究中心有限公司 | A kind of method of polarization/depolarization current method check and evaluation stator bar insulation ag(e)ing state |
| JP2021056050A (en) * | 2019-09-27 | 2021-04-08 | Ｊｆｅスチール株式会社 | Insulator deterioration diagnostic device and insulator deterioration diagnostic method for electric rotary machine |
| CN111352049A (en) * | 2020-04-21 | 2020-06-30 | 中国科学院合肥物质科学研究院 | Cable electricity core inspection robot |
| CN111352049B (en) * | 2020-04-21 | 2022-08-02 | 中国科学院合肥物质科学研究院 | Cable electricity core inspection robot |
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