JPH04215076A - Partial discharge measuring method - Google Patents
Partial discharge measuring methodInfo
- Publication number
- JPH04215076A JPH04215076A JP41017090A JP41017090A JPH04215076A JP H04215076 A JPH04215076 A JP H04215076A JP 41017090 A JP41017090 A JP 41017090A JP 41017090 A JP41017090 A JP 41017090A JP H04215076 A JPH04215076 A JP H04215076A
- Authority
- JP
- Japan
- Prior art keywords
- partial discharge
- pulse
- power cable
- cable
- high 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims description 7
- 230000003213 activating effect Effects 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000013016 damping Methods 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000644 propagated effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 8
- 239000004020 conductor Substances 0.000 description 6
- 238000000691 measurement method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002620 method output Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Testing Relating To Insulation (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は部分放電測定方法に関し
、さらに詳しくは高電圧ケーブルに接続された高電圧絶
縁機器（変圧器、開閉器、高電圧ケーブル等）の絶縁診
断を行う部分放電測定方法に関するものである。[Industrial Application Field] The present invention relates to a partial discharge measurement method, and more specifically, partial discharge measurement for diagnosing the insulation of high voltage insulated equipment (transformers, switches, high voltage cables, etc.) connected to high voltage cables. It is about the method.
【０００２】0002
【従来の技術】高電圧電力ケーブルや、電力ケーブルに
接続されたガス絶縁開閉装置（ＧＩＳ）又はトランス等
の高電圧絶縁機器の絶縁診断法としては、従来より部分
放電測定方法が採用されていた。[Prior Art] A partial discharge measurement method has traditionally been adopted as an insulation diagnosis method for high-voltage power cables and high-voltage insulated equipment such as gas-insulated switchgear (GIS) or transformers connected to power cables. .
【０００３】図３は、ガス絶縁開閉装置の絶縁診断を行
う場合の部分放電測定方法の一例を示すものである（昭
和６３年度電気学会全国大会Ｎｏ．１０８４）。この方
法では、ガス絶縁開閉装置１０の高電圧導体１１の端部
近傍に針状金属１２を取り付けて強制的に部分放電を発
生させ、ループアンテナ１３ａ及び１３ｂ、接地線１４
、及びスペーサコロナ検出端子１５に配置した４個のセ
ンサ（図示せず。）で同時に部分放電を測定するもので
ある。図中、１６は高圧ブッシング、１７はコンデンサ
である。FIG. 3 shows an example of a method for measuring partial discharge when performing insulation diagnosis of gas-insulated switchgear (1984 National Institute of Electrical Engineers of Japan Conference No. 1084). In this method, a needle metal 12 is attached near the end of a high voltage conductor 11 of a gas insulated switchgear 10 to forcibly generate a partial discharge, and loop antennas 13a and 13b, a ground wire 14
, and four sensors (not shown) placed on the spacer corona detection terminal 15 to simultaneously measure partial discharge. In the figure, 16 is a high-pressure bushing, and 17 is a capacitor.
【０００４】また図４は、ノイズ除去を図った部分放電
測定方法の例を示す（昭和６３年度電気学会全国大会Ｎ
ｏ．１０８５）。この方法では、変圧器等の機器２０の
接地線２１に、所定周波数に同調するセンサ２２及びノ
イズ検出用センサ２３を取り付け、差動増幅回路２４に
より各センサの信号の差をとってノイズの低減を図り、
さらに位相制御回路２５により所定位相区間だけゲート
回路を開いて定常ノイズ信号の除去された部分放電信号
を得るものである。尚、センサは機器のケース等の接地
線に設けられているが、中性系の接地線に取り付けられ
てもよい。FIG. 4 shows an example of a partial discharge measurement method that removes noise.
o. 1085). In this method, a sensor 22 tuned to a predetermined frequency and a noise detection sensor 23 are attached to a grounding wire 21 of a device 20 such as a transformer, and a differential amplifier circuit 24 calculates the difference between the signals of each sensor to reduce noise. With the aim of
Further, the phase control circuit 25 opens the gate circuit for a predetermined phase period to obtain a partial discharge signal from which the stationary noise signal has been removed. Although the sensor is provided on the ground wire of the case of the device, it may be attached to a neutral ground wire.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記のような
従来の部分放電測定方法では、以下に示すような問題点
があった。However, the conventional partial discharge measuring method as described above has the following problems.
【０００６】図３に示した部分放電測定方法では、コロ
ナ検出端子１５で示されるように、センサをガス絶縁開
閉装置内に予め埋め込んで測定するので、測定個所が限
定されてしまうという問題点があった。In the partial discharge measuring method shown in FIG. 3, the sensor is embedded in the gas-insulated switchgear in advance, as shown by the corona detection terminal 15, and measurement is performed, so there is a problem that the measurement locations are limited. there were.
【０００７】また、図４に示した部分放電測定方法では
、接地線から部分放電を検出するので、測定する機器が
変圧器等の場合は、変圧器の高電圧部から生じた部分放
電パルスが伝播していく過程で減衰する一方でノイズは
増加し、高い検出感度を得ることができないという問題
点があった。In addition, in the partial discharge measuring method shown in FIG. 4, partial discharge is detected from the ground wire, so if the equipment to be measured is a transformer, the partial discharge pulse generated from the high voltage section of the transformer is detected. There is a problem in that the noise increases while attenuating during the propagation process, making it impossible to obtain high detection sensitivity.
【０００８】従って、本発明の目的は、高電圧ケーブル
に接続された高電圧絶縁機器の部分放電を活線状態で簡
便にかつ高感度で測定できるようにした部分放電測定方
法を提供することである。[0008] Accordingly, an object of the present invention is to provide a partial discharge measuring method that allows partial discharge of high voltage insulated equipment connected to a high voltage cable to be easily and highly sensitively measured in a live line state. be.
【０００９】[0009]
【課題を解決するための手段】本発明は、高電圧ケーブ
ルに接続された高電圧絶縁機器の部分放電を活線状態で
簡便にかつ高感度で測定できるようにするため、電力ケ
ーブルの静電容量を結合コンデンサとして含んだ測定系
により部分放電パルスを検出するようにした部分放電測
定方法を提供する。[Means for Solving the Problems] The present invention aims to measure electrostatic discharge of power cables in order to easily and highly sensitively measure partial discharges in high voltage insulated equipment connected to high voltage cables in a live line state. A partial discharge measuring method is provided in which a partial discharge pulse is detected by a measuring system including a capacitance as a coupling capacitor.
【００１０】なお、上記のようにして検出した部分放電
パルスのパルス波形及びパスル極性を観察し、パルス波
形と課電圧位相との関係及びパルス極性との関係を求め
、これらの関係から部分放電パルスの発生領域を特定す
ることも可能である。Note that the pulse waveform and pulse polarity of the partial discharge pulse detected as described above are observed, the relationship between the pulse waveform and the applied voltage phase and the relationship with the pulse polarity is determined, and from these relationships, the partial discharge pulse is determined. It is also possible to identify the area where this occurs.
【００１１】上記のパルス極性及びパルス波形を観察す
る方法は、同調型部分放電検出器による中間周波出力パ
ルス又はビデオ出力パルスによりデジタル型波形記録装
置を起動し、課電圧波形、部分放電パルス波形及び同調
法出力パルス（中間同調出力パルス、ビデオ出力パルス
）波形を同時に記録して観察するようにするとよい。The method for observing the pulse polarity and pulse waveform described above is to start a digital waveform recording device with an intermediate frequency output pulse or a video output pulse from a tunable partial discharge detector, and record the applied voltage waveform, partial discharge pulse waveform, and It is preferable to simultaneously record and observe the tuning method output pulse (intermediate tuning output pulse, video output pulse) waveform.
【００１２】0012
【作用】本発明の部分放電測定方法は、電力ケーブルを
結合コンデンサとして含む測定系により部分放電パルス
を検出するようにしたので、電力ケーブルの金属シース
の接地線を利用することにより、測定装置の接続が容易
になり、また、電力ケーブルの静電容量によって部分放
電パルスを比較的小さな減衰量で検出することができる
。一方、ノイズは電力ケーブルを伝播する過程で減衰し
、被測定機器の部分放電の測定を行う場所ではノイズレ
ベルが低下する。特に、電力ケーブルが長尺で、被測定
機器がノイズの少ない地下に設置されているような場合
には、ノイズレベルの低下が大きい。[Operation] The partial discharge measuring method of the present invention detects partial discharge pulses using a measurement system that includes a power cable as a coupling capacitor. Connection is facilitated, and partial discharge pulses can be detected with relatively small attenuation due to the capacitance of the power cable. On the other hand, noise is attenuated in the process of propagating through power cables, and the noise level decreases at the location where the partial discharge of the device under test is measured. In particular, when the power cable is long and the device under test is installed underground where there is little noise, the noise level decreases significantly.
【００１３】[0013]
【実施例】以下、本発明の部分放電測定方法について詳
細に説明する。EXAMPLES The partial discharge measuring method of the present invention will be explained in detail below.
【００１４】図１は、本発明の部分放電測定法の一実施
例を示したものである。電力ケーブル３０の終端部には
シース絶縁筒３１が取り付けられており、その先のケー
ブル終端接続部３２は金属製の密閉タンク３３内に密閉
され、電力ケーブル３０から引き出された高電圧導体３
４は、密閉タンク３３内に設置された変圧器３５の高圧
端子と密閉状態で接続されている。密閉タンク３３内の
高電圧導体３４周囲には絶縁性の油、ガス等が充填され
ている。電力ケーブル３０のシース３６はケーブル終端
部付近において接地線３７で接地されている。接地線３
７には高周波鉄心３８が取り付けられ、この両端に検出
インピーダンス３９を介して部分放電検出器４０が取り
付けられている。FIG. 1 shows an embodiment of the partial discharge measuring method of the present invention. A sheath insulating tube 31 is attached to the terminal end of the power cable 30, and the cable terminal connection section 32 beyond that is sealed in a metal sealed tank 33, and the high voltage conductor 3 drawn out from the power cable 30
4 is hermetically connected to a high-voltage terminal of a transformer 35 installed inside the hermetically sealed tank 33. The area around the high voltage conductor 34 in the sealed tank 33 is filled with insulating oil, gas, etc. The sheath 36 of the power cable 30 is grounded by a grounding wire 37 near the end of the cable. Ground wire 3
A high frequency iron core 38 is attached to 7, and a partial discharge detector 40 is attached to both ends of the core 38 via a detection impedance 39.
【００１５】図２は、本測定方法における等価回路を示
す。電力ケーブル３０の高電圧導体３４とシース３６間
の静電容量は、結合コンデンサＣ１（４１）として作用
する。また、変圧器３５の静電容量をＣ３（４２）とす
る。
ここで、高電圧導体３４とシース３５間に高電圧が加わ
って活線状態となった場合を考える。この状態で、部分
放電が例えば変圧器３５の静電容量Ｃ３（４２）で生じ
た場合には、部分放電電流は、変圧器３５の静電容量Ｃ
３（４２）、検出インピーダンス３９及び電力ケーブル
３０の静電容量Ｃ１（４１）とから成るループ内を環状
に流れる。一方、部分放電が電力ケーブル３０の静電容
量Ｃ１（４１）で生じた場合には、部分放電電流は、電
力ケーブル３０の静電容量Ｃ１（４１）、検出インピー
ダンス３９及び変圧器３５の静電容量Ｃ３（４２）から
成るループ内を環状に流れる。これらの電流を部分放電
検出器４０により検出することにより、部分放電の判定
を行うことができる。FIG. 2 shows an equivalent circuit in this measurement method. The capacitance between the high voltage conductor 34 and the sheath 36 of the power cable 30 acts as a coupling capacitor C1 (41). Further, the capacitance of the transformer 35 is assumed to be C3 (42). Here, consider a case where a high voltage is applied between the high voltage conductor 34 and the sheath 35, resulting in a live wire state. In this state, if a partial discharge occurs, for example, in the capacitance C3 (42) of the transformer 35, the partial discharge current will be caused by the capacitance C3 (42) of the transformer 35.
3 (42), the detection impedance 39, and the capacitance C1 (41) of the power cable 30. On the other hand, when a partial discharge occurs in the capacitance C1 (41) of the power cable 30, the partial discharge current is generated by the capacitance C1 (41) of the power cable 30, the detection impedance 39, and the static capacitance of the transformer 35. It flows annularly in a loop consisting of capacitor C3 (42). By detecting these currents with the partial discharge detector 40, partial discharge can be determined.
【００１６】なお、部分放電検出器４０として部分放電
パルスの極性を識別できる装置を用いた場合には、部分
放電パルス電流の極性及びその瞬時の電圧極性を分析す
ることにより、部分放電が電力ケーブルで起こっている
ものか、あるいは変圧器で起こっているかを判別するこ
とができる。Note that when a device capable of identifying the polarity of a partial discharge pulse is used as the partial discharge detector 40, it is possible to detect whether a partial discharge is detected by analyzing the polarity of the partial discharge pulse current and its instantaneous voltage polarity. It is possible to determine whether the problem is occurring in the transformer or in the transformer.
【００１７】本実施例では変圧器を含む場合の部分放電
測定方法の例を示したが、ガス絶縁開閉装置、試験用変
成器、アレスタ等の各機器を含む場合についても部分放
電測定をすることが可能である。当然、電力ケーブルに
接続された電力ケーブルの部分放電の測定にも適用でき
る。[0017] In this example, an example of a method for measuring partial discharge in a case where a transformer is included is shown, but partial discharge measurement can also be carried out in a case where various equipment such as a gas insulated switchgear, a test transformer, an arrester, etc. are included. is possible. Naturally, it can also be applied to measuring partial discharges in power cables connected to power cables.
【００１８】[0018]
【発明の効果】以上説明した通り、本発明の部分放電測
定方法によると、高周波伝播特性の優れた電力ケーブル
を結合コンデンサとして含む測定系により部分放電パル
スの検出を行うので、高電圧ケーブルに接続された高電
圧絶縁機器の部分放電を活線状態で簡便にかつ高感度で
測定することができる。[Effects of the Invention] As explained above, according to the partial discharge measurement method of the present invention, partial discharge pulses are detected using a measurement system that includes a power cable with excellent high frequency propagation characteristics as a coupling capacitor, so it is connected to a high voltage cable. Partial discharges in high-voltage insulated equipment can be measured easily and with high sensitivity under live wire conditions.
【図１】本発明の部分放電測定方法の一実施例を示す説
明図である。FIG. 1 is an explanatory diagram showing an embodiment of the partial discharge measuring method of the present invention.
【図２】図１の等価回路を示す説明図である。FIG. 2 is an explanatory diagram showing an equivalent circuit of FIG. 1;
【図３】従来の部分放電測定方法を示す説明図である。FIG. 3 is an explanatory diagram showing a conventional partial discharge measuring method.
【図４】従来の他の部分放電測定方法を示す説明図であ
る。FIG. 4 is an explanatory diagram showing another conventional partial discharge measuring method.
３０ 電力ケーブル
３１ シース絶縁筒
３２ ケーブル終端接続部
３３ 密閉タンク
３４ 高電圧導体
３５ 変圧器
３６ シース
３７ 接地線
３８ 高周波鉄心
３９ 検出インピーダ
ンス
４０ 部分放電検出器
４１ 結合コンデンサ
４２ 変圧器の静電容量30 Power cable
31 Sheath insulation tube 32 Cable end connection part
33 Sealed tank 34 High voltage conductor
35 Transformer 36 Sheath
37 Grounding wire 38 High frequency iron core
39 Detection impedance 40 Partial discharge detector
41 Coupling capacitor 42 Capacitance of transformer
Claims (3)
絶縁機器の部分放電測定方法において、電力ケーブルの
静電容量を結合コンデンサとして含んだ測定系により前
記高電圧絶縁機器の部分放電パルスを検出することを特
徴とする部分放電測定方法。1. A method for measuring partial discharge of high voltage insulated equipment connected to a power cable line, wherein a partial discharge pulse of the high voltage insulated equipment is detected by a measurement system that includes the capacitance of the power cable as a coupling capacitor. A partial discharge measuring method characterized by:
パスル極性を観察し、パルス波形と課電圧との位相差及
びパルス極性との関係から前記部分放電パルスの発生領
域を特定することを特徴とする請求項１の部分放電測定
方法。2. The method is characterized in that the pulse waveform and pulse polarity of the partial discharge pulse are observed, and the generation area of the partial discharge pulse is specified from the relationship between the phase difference between the pulse waveform and the applied voltage and the pulse polarity. The partial discharge measuring method according to claim 1.
は、同調型部分放電検出器による中間周波出力パルス又
はビデオ出力パルスによりデジタル型波形記録装置を起
動し、課電圧波形、部分放電パルス波形及び同調法出力
パルス（中間同調出力パルス、ビデオ出力パルス）波形
を同時に記録して観察するものである、請求項２の部分
放電測定方法。3. Observation of the pulse polarity and pulse waveform is performed by activating a digital waveform recording device using an intermediate frequency output pulse or a video output pulse from a tuned partial discharge detector, and observing the applied voltage waveform, partial discharge pulse waveform, and tuning. 3. The partial discharge measuring method according to claim 2, wherein waveforms of the modulated output pulse (intermediate tuning output pulse, video output pulse) are simultaneously recorded and observed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02410170A JP3087969B2 (en) | 1990-12-12 | 1990-12-12 | Partial discharge measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02410170A JP3087969B2 (en) | 1990-12-12 | 1990-12-12 | Partial discharge measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04215076A true JPH04215076A (en) | 1992-08-05 |
| JP3087969B2 JP3087969B2 (en) | 2000-09-18 |
Family
ID=18519368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02410170A Expired - Fee Related JP3087969B2 (en) | 1990-12-12 | 1990-12-12 | Partial discharge measurement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3087969B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009258011A (en) * | 2008-04-18 | 2009-11-05 | J-Power Systems Corp | Partial discharge measuring method |
| CN104007371A (en) * | 2014-05-15 | 2014-08-27 | 深圳供电局有限公司 | Device and method used for checking partial discharge signals of cable |
| CN111624453A (en) * | 2020-05-14 | 2020-09-04 | 广东电网有限责任公司 | Distribution cable partial discharge off-line testing device |
| CN112840219A (en) * | 2018-09-10 | 2021-05-25 | 3M创新有限公司 | Power cable monitoring device using low side electrode and ground separation |
-
1990
- 1990-12-12 JP JP02410170A patent/JP3087969B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009258011A (en) * | 2008-04-18 | 2009-11-05 | J-Power Systems Corp | Partial discharge measuring method |
| CN104007371A (en) * | 2014-05-15 | 2014-08-27 | 深圳供电局有限公司 | Device and method used for checking partial discharge signals of cable |
| CN112840219A (en) * | 2018-09-10 | 2021-05-25 | 3M创新有限公司 | Power cable monitoring device using low side electrode and ground separation |
| CN111624453A (en) * | 2020-05-14 | 2020-09-04 | 广东电网有限责任公司 | Distribution cable partial discharge off-line testing device |
| CN111624453B (en) * | 2020-05-14 | 2023-01-24 | 广东电网有限责任公司 | Distribution cable partial discharge off-line testing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3087969B2 (en) | 2000-09-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Boggs et al. | Fundamental limitations in the measurement of corona and partial discharge | |
| JP3628244B2 (en) | Partial discharge detection method | |
| US5075629A (en) | Partial discharge detecting device for electrical equipments | |
| JP3243752B2 (en) | Partial discharge detection device for gas insulated equipment and its calibration method | |
| US6420879B2 (en) | System and method for measurement of partial discharge signals in high voltage apparatus | |
| Farag et al. | On-line partial discharge calibration and monitoring for power transformers | |
| Boggs et al. | Coupling devices for the detection of partial discharges in gas-insulated switchgear | |
| JP3294806B2 (en) | Partial discharge detector for gas insulated electrical equipment | |
| JPH04215076A (en) | Partial discharge measuring method | |
| JP2624914B2 (en) | Partial discharge measuring device and its test method | |
| Behrmann et al. | Results of UHF measurements in a 220 kV GIS Substation during on-site commissioning tests | |
| JPS61173175A (en) | Partial discharge monitor device for high-voltage apparatus | |
| JPH0382316A (en) | Partial discharge detector of gas-insulated apparatus | |
| Schoffner et al. | PD measurements in N/sub 2/-SF/sub 6/gas mixtures with the UHF method | |
| JPH04194762A (en) | Device for monitoring partial discharge of electric apparatus | |
| Polyakov | Research of Partial Discharge Registration Effectiveness Using HFCT Sensor | |
| Boggs et al. | Partial discharge location in gas-insulated switchgear | |
| Moorthy et al. | Practical on-line partial discharge measuring system for high voltage apparatus | |
| JP3236770B2 (en) | Partial discharge measurement method for CV cable line | |
| JP2001343418A (en) | Partial discharge diagnostic apparatus | |
| JP3195862B2 (en) | Partial discharge detection device | |
| JPH02161369A (en) | Measuring method for partial electric discharge | |
| Xu et al. | An advanced method for detection of partial discharge in oil-paper insulated transformer bushings and current transformers | |
| JPH03246473A (en) | Partial discharge measuring method | |
| JPS63186512A (en) | Grounding device for compact switchgear |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |