JPH03246473A - Partial discharge measuring method - Google Patents

Partial discharge measuring method

Info

Publication number
JPH03246473A
JPH03246473A JP4385690A JP4385690A JPH03246473A JP H03246473 A JPH03246473 A JP H03246473A JP 4385690 A JP4385690 A JP 4385690A JP 4385690 A JP4385690 A JP 4385690A JP H03246473 A JPH03246473 A JP H03246473A
Authority
JP
Japan
Prior art keywords
phase
partial discharge
voltage
detected
high frequency
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
Application number
JP4385690A
Other languages
Japanese (ja)
Other versions
JP2564956B2 (en
Inventor
Takeshi Endo
遠藤 桓
Junichi Minafuji
皆藤 順一
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.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable Ltd
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 Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP2043856A priority Critical patent/JP2564956B2/en
Publication of JPH03246473A publication Critical patent/JPH03246473A/en
Application granted granted Critical
Publication of JP2564956B2 publication Critical patent/JP2564956B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To measure partial discharging without interrupting power service by detecting the phase of the hot-line voltage of a power and deciding detected high frequency wave pulses as a partial discharging signal when the detected phase is a specific phase. CONSTITUTION:When a high voltage is applied from the high voltage charging conductor 3 of a substation S, partial discharge is caused if the insulator of the cable 1 deteriorates to induce the high frequency pulses between a cable conductor and a metallic sheath 4; if there is an external noise, the high fre quency pulses are induced in e metallic sheath 4. Those high frequency pulses are detected by metallic foil electrodes 5 and 5 which are set opposite the metallic sheath 4 across a vinyl sheath 4a, measured as a signal of the potential difference between both ends of detection impedance 6, and displayed on a CRT 8. Then the phase of the hot-line voltage is detected from the secondary winding of a transformer 10 for an instrument to decide the high frequency pulses as the partial discharging signal when the detected phase slightly leads a peak value or as external noises in other cases.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は部分放電測定方法に関し、特に電力ケーブル等
の絶縁体の劣化診断に利用できる部分放電測定方法に関
する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a partial discharge measuring method, and particularly to a partial discharge measuring method that can be used for diagnosing deterioration of insulators such as power cables.

〔背景技術〕[Background technology]

部分放電測定方法として、例えば、活線運転を停止した
電力ケーブル線路のケーブル導体に試験用変圧器から試
験電圧を課電し、課電状態の電力ケーブルから高周波パ
ルスを検出し、試験電圧の位相が最大値およびその付近
を含んだ、それより若干進んだ位相にあるときに検出さ
れた高周波パルスを電力器の絶縁体の部分放電信号とし
て判定する方法が試みられている。
As a partial discharge measurement method, for example, a test voltage is applied from a test transformer to the cable conductor of a power cable line whose live line operation has been stopped, a high-frequency pulse is detected from the power cable in the energized state, and the phase of the test voltage is determined. Attempts have been made to determine a high-frequency pulse detected when the phase is slightly advanced, including the maximum value and its vicinity, as a partial discharge signal of the insulator of the power unit.

この部分放電測定方法によると、試験電圧が上述の位相
にないとき、例えば、ゼロクロス点近辺の位相で検出さ
れた高周波パルスは、外部ノイズが電力ケーブル41!
路に重畳したものと判断し、それを測定対象信号から除
外して、絶縁体の劣化診断を行う。
According to this partial discharge measurement method, when the test voltage is not in the above-mentioned phase, for example, a high frequency pulse detected at a phase near the zero cross point is caused by external noise on the power cable 41!
The deterioration of the insulator is diagnosed by determining that it is superimposed on the signal and excluding it from the signal to be measured.

また、外部ノイズに基づく高周波パルスは試験電圧の課
電を停止しても発生するのに対し、部分放電に基づく高
周波パルスは試験電圧の課電を停止すると発生しなくな
るので、試験電圧の課電の有無に基づいて発生する高周
波パルスの対比によっても、外部ノイズと部分放電信号
の区別をすることができる。
In addition, high-frequency pulses caused by external noise occur even if the application of the test voltage is stopped, whereas high-frequency pulses caused by partial discharges do not occur when the application of the test voltage is stopped. It is also possible to distinguish between external noise and partial discharge signals by comparing the high frequency pulses generated based on the presence or absence of .

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかし、以上述べた試験用変圧器を利用した部分放電測
定方法によると、活線運転を停止しなければならないた
め、−時的に電力サービスを中断しなければならず、ま
た試験用変圧器から課電するため、専用の機器を必要と
する不便さ、およびそれを接続する手数の煩わしさが生
じる。
However, according to the partial discharge measurement method using the test transformer described above, since the live line operation must be stopped, the power service must be interrupted from time to time, and the Since electricity is charged, there is the inconvenience of requiring a dedicated device and the hassle of connecting it.

従って本発明の目的は、電力サービスを中断しないで実
行することができる部分放電測定方法を提供することで
ある。
SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a partial discharge measuring method that can be carried out without interrupting power service.

本発明の他の目的は、専用の機器を必要としない部分放
電測定方法を提供することである。
Another object of the present invention is to provide a partial discharge measuring method that does not require dedicated equipment.

〔課題を解決するための手段〕[Means to solve the problem]

本発明は、電力サービスを継続し、専用の機器を使用し
ないで絶縁体の部分放電を測定するため、電力ケーブル
の既存の設備から活線電圧の位相を検出し、その位相が
所定の位相にあるときに電力ケーブルから検出された高
周波パルスを部分放電信号であると判定する部分放電測
定方法を提供する。
The present invention detects the phase of the live voltage from the existing equipment of the power cable and adjusts the phase to a predetermined phase in order to continue the power service and measure partial discharge in the insulator without using specialized equipment. A partial discharge measuring method is provided for determining that a high frequency pulse detected from a power cable at a certain time is a partial discharge signal.

上述した所定の位相は、活線電圧が絶対値において最大
値になる位相およびそれを含んだそれより若干進んだ位
相であり、また活線電圧の位相は、変電所、配電線路の
π分岐部等に常設されている計器用変圧器、検電端子、
架空線の対地静電容量、配電用変圧器等を利用して検出
することができる。
The above-mentioned predetermined phase is the phase at which the live line voltage reaches its maximum absolute value and a phase that is slightly ahead of the phase that includes this, and the phase of the live line voltage is the phase at which the live line voltage reaches its maximum absolute value. Instrument transformers, voltage detection terminals, etc. permanently installed in
It can be detected using the ground capacitance of overhead lines, distribution transformers, etc.

この移動の検出部が部分放電の測定位置から遠く離れて
いるときは、伝送媒体、例えば被測定電カケ−プル線路
を利用して位相信号を測定位置まで伝送すればよい。
When the movement detection section is far away from the partial discharge measurement position, the phase signal may be transmitted to the measurement position using a transmission medium, for example, an electrical cable line to be measured.

〔作用〕[Effect]

高圧電源に接続された高圧導体から電力ケーブルのケー
ブル導体に高電圧が印加される。電力ケーブル絶縁体に
劣化があるとそこで部分放電が発生し、ケーブル導体と
金属シースの間に高周波パルスが誘起される。同時に外
部ノイズがあると、金属ンースに高周波パルスとして誘
導される。これらの高周波パルスは、例えば金属シース
にビニルシースを介して対向させた箔状電極によって検
出され、検出インピーダンスの両端の電位差信号として
部分放電検出装置で測定され、必要に応じてCRT等の
モニター上に表示される。一方、計器用変圧器の二次巻
線から活線電圧の位相が検出され、この位相がピーク値
およびそれを含んだそれより若干進んだ位相にあるとき
に検出された高周波パルスを部分放電信号とし、それ以
外の高周波パルスを外部ノイズと判定する。この位相と
部分放電信号の関係は、これまでの多くの研究者の実験
結果に基づくものである。
A high voltage is applied to the cable conductor of the power cable from a high voltage conductor connected to a high voltage power source. Deterioration of the power cable insulation causes partial discharges, which induce high frequency pulses between the cable conductor and the metal sheath. At the same time, external noise is induced in the metal ground as a high frequency pulse. These high-frequency pulses are detected by, for example, a foil-shaped electrode that faces a metal sheath through a vinyl sheath, and are measured by a partial discharge detection device as a potential difference signal between both ends of a detection impedance, and are displayed on a monitor such as a CRT as necessary. Is displayed. On the other hand, the phase of the live line voltage is detected from the secondary winding of the potential transformer, and the high-frequency pulse detected when this phase is at the peak value and a phase slightly ahead of that including the peak value is used as a partial discharge signal. and other high-frequency pulses are determined to be external noise. This relationship between the phase and the partial discharge signal is based on the experimental results of many researchers so far.

以下、実施例により本発明をさらに詳細に説明する。Hereinafter, the present invention will be explained in more detail with reference to Examples.

〔実施例1〕 第1図に、本発明による部分放電測定の方法の一実施例
を示す。第1図で電力ケーブル1はケーブル終端部2で
高圧課電導体3に接続される一方、絶縁接続部4が設け
られている。絶縁接続部4には一対の金属箔電極5,5
が絶縁筒4aの両側に取り付けられている。金属箔電極
5,5はそれぞれ検出インピーダンス6の両端に接続さ
れ、検出インピーダンス6に測定装置7が接続されてい
る。
[Example 1] FIG. 1 shows an example of a partial discharge measuring method according to the present invention. In FIG. 1, a power cable 1 is connected at a cable end 2 to a high-voltage carrying conductor 3, while an insulated connection 4 is provided. A pair of metal foil electrodes 5, 5 are provided on the insulated connection portion 4.
are attached to both sides of the insulating tube 4a. The metal foil electrodes 5, 5 are each connected to both ends of a detection impedance 6, and a measuring device 7 is connected to the detection impedance 6.

測定装置7の出力はCRT8に接続されている。The output of the measuring device 7 is connected to a CRT 8.

金属箔電極5.5にはまたAM復調器9が接続され、そ
の復調出力はCRT8に接続されている。
An AM demodulator 9 is also connected to the metal foil electrode 5.5, and its demodulated output is connected to the CRT 8.

変電所Sの高圧課電導体3には、計器用変圧器(PT)
10の一次巻線が大地との間に接続されている。計器用
変圧器10の二次巻線はElo(電気/光)変換器11
に接続され、E10変換器1工は0/E(光/電気)変
換器12に光ファイバ13により接続されている。O/
E変換器I2の出力はAM変調器14に接続され、その
出力8は被測定ケーブル1の終端接続部の接地シース1
aに接続されている。接地シース1aからの接地線1b
には高周波鉄心工5が取り付けられている。3aは気中
送電線を示す。
The high-voltage conductor 3 of the substation S is equipped with a potential transformer (PT).
Ten primary windings are connected to ground. The secondary winding of the instrument transformer 10 is an Elo (electrical/optical) converter 11
One E10 converter is connected to an O/E (optical/electrical) converter 12 by an optical fiber 13. O/
The output of the E-transducer I2 is connected to an AM modulator 14, whose output 8 is connected to the grounding sheath 1 of the terminal connection of the cable 1 under test.
connected to a. Ground wire 1b from ground sheath 1a
A high frequency iron core 5 is attached to. 3a shows an aerial power transmission line.

第1図の構成の動作は以下の通りである。The operation of the configuration of FIG. 1 is as follows.

金属箔電極5.5により部分放電パルスが検出され、検
出インピーダンス6を介して測定装置7で測定される。
Partial discharge pulses are detected by a metal foil electrode 5.5 and measured via a detection impedance 6 in a measuring device 7.

測定装置7の出力はCRT8で波形が再生される。計器
用変圧器10の二次巻線の出力電圧はE10変換器11
でE10変換され、光ファイハエ3により伝送され、O
/E変換器12でO/E変換される。AM変調器14は
この位相情報信号をAM変調し、変調された信号波は終
端接続部の接地シース1aから被測定ケーブル1に注入
される。接地シース1aからの接地線1bの信号波に対
するインピーダンスは、取り付けられた高周波鉄心15
により高められている。
The waveform of the output of the measuring device 7 is reproduced by the CRT 8. The output voltage of the secondary winding of the instrument transformer 10 is determined by the E10 converter 11.
is converted to E10, transmitted by optical fiber fly 3, and O
The /E converter 12 performs O/E conversion. The AM modulator 14 performs AM modulation on this phase information signal, and the modulated signal wave is injected into the cable under test 1 from the grounded sheath 1a of the terminal connection. The impedance of the grounding wire 1b from the grounding sheath 1a to the signal wave is determined by the attached high-frequency iron core 15.
It is enhanced by

被測定ケーブル1を経て伝送された信号波は金属箔電極
5.5により抽出され、AM復調器9で復調され、CR
T8で再生される。
The signal wave transmitted through the cable under test 1 is extracted by the metal foil electrode 5.5, demodulated by the AM demodulator 9, and then CR
Played on T8.

第2図に、CRT8で再生される検出パルスHP、−H
P、および課電圧位相情報信号Pの波形の例を示す。第
2図(a)は位相情報信号Pの波形を示す。第2図(b
)は検出インピーダンス6を介して観測されたパルス波
形HP、−HP4を示す。第2図(b)には4つのパル
ス群が認められるが、課電圧位相との関係から見ると、
パルス群HP2.HP、はノイズ性パルスである可能性
が強い。一方パルス群HP、、HP、は、部分放電が課
電圧の位相のピーク値付近またはそれより若干進んだ位
相において生じる特質を考慮すれば、部分放電パルスで
ある可能性が強い。
Fig. 2 shows detection pulses HP, -H reproduced by CRT8.
3 shows an example of the waveforms of P and the applied voltage phase information signal P. FIG. 2(a) shows the waveform of the phase information signal P. Figure 2 (b
) shows pulse waveforms HP, -HP4 observed through the detection impedance 6. Four pulse groups are recognized in Fig. 2(b), but when viewed from the relationship with the applied voltage phase,
Pulse group HP2. There is a strong possibility that HP is a noisy pulse. On the other hand, the pulse groups HP, , HP, are highly likely to be partial discharge pulses, considering the characteristic that partial discharge occurs near the peak value of the phase of the applied voltage or in a phase slightly ahead of the peak value.

計器用変圧器10の代わりに、電力用降圧変圧器を用い
てもよい。この場合位相情報に若干の位相誤差を伴うが
、部分放電の発生位相に幅があることから、はとんど問
題にはならない。
A power step-down transformer may be used instead of the potential transformer 10. In this case, there is a slight phase error in the phase information, but since there is a range in the phase at which partial discharge occurs, this is rarely a problem.

〔実施例2〕 本発明の方法を用いて部分放電測定を行う場合の他の構
成を第3図に示す。第3図で、電力ケーブル1、ケーブ
ル終端部2、高圧課電導体3、絶縁接続部4、一対の金
属箔電極5,5は、第1図と同しである。金属箔電極5
,5はそれぞれ検出インピーダンス6の両端に接続され
、一方AM復調器9にも接続されている。検出インピー
ダンス6は増幅器31に接続されており、増幅器31の
出力はマルチゲート回路32に接続され、マルチゲート
回路32の出力はトリガー回路33の入力に接続されて
いる。トリガー回路33の出力信号はパルス計数装置E
34に入力される。マルチゲート回路32は5つの単位
ゲート(図示せず)から構成され、単位ゲートには各々
、時間とそれに対応する電位範囲が設定される。ゲート
の設定は、部分放電が選択的に生じる課電圧の位相のピ
ーク値付近またはそれより若干進んだ位相においてゲー
トが開くように行われる。マルチゲート回路32には、
単位ゲートの時間設定のためのゲート信号として、AM
復調器9からの復調出力が入力される。計器用変圧器1
0、E10変換器11.0/E変換器12、光ファイバ
13、AM変調器14、接地シース1a、接地線1b、
高周波鉄心15は第1図と同様である。
[Example 2] FIG. 3 shows another configuration for performing partial discharge measurement using the method of the present invention. In FIG. 3, the power cable 1, the cable termination 2, the high-voltage conductor 3, the insulated connection 4, and the pair of metal foil electrodes 5, 5 are the same as in FIG. Metal foil electrode 5
, 5 are connected to both ends of the detection impedance 6, and are also connected to the AM demodulator 9. The detection impedance 6 is connected to an amplifier 31 , the output of the amplifier 31 is connected to a multi-gate circuit 32 , and the output of the multi-gate circuit 32 is connected to the input of a trigger circuit 33 . The output signal of the trigger circuit 33 is sent to the pulse counting device E.
34. The multi-gate circuit 32 is composed of five unit gates (not shown), and a time and a corresponding potential range are set for each unit gate. The gate is set so that the gate opens near the peak value of the phase of the applied voltage at which partial discharge selectively occurs or at a phase slightly ahead of the peak value. The multi-gate circuit 32 includes
AM as a gate signal for time setting of unit gate.
The demodulated output from the demodulator 9 is input. Instrument transformer 1
0, E10 converter 11.0/E converter 12, optical fiber 13, AM modulator 14, ground sheath 1a, ground wire 1b,
The high frequency core 15 is the same as that shown in FIG.

第3図の構成の動作は以下の通りである。The operation of the configuration of FIG. 3 is as follows.

絶縁接続部4の付近で部分放電が発生すると、部分放電
パルスは検出インピーダンス6の両端に電位差を生じる
。この電位差は増幅器31で適当な大きさに増幅されて
、マルチゲート回路32に入る。入力パルスがマルチゲ
ート回路32の各単位ゲートの設定条件を全て満たして
いると、出力信号がトリガー回路33に与えられ、トリ
ガー回路33の出力はパルス計数装置34に入力される
When a partial discharge occurs near the insulated connection portion 4, the partial discharge pulse generates a potential difference between both ends of the detection impedance 6. This potential difference is amplified to an appropriate magnitude by an amplifier 31 and then input to a multi-gate circuit 32. When the input pulse satisfies all the setting conditions of each unit gate of the multi-gate circuit 32, an output signal is given to the trigger circuit 33, and the output of the trigger circuit 33 is input to the pulse counting device 34.

ゲート信号として入力される位相情報信号を時間の基準
として設定された、マルチゲート回路32の各単位ゲー
トの設定条件を、全て満たす出力信号のみに対応して発
生するトリガー出力が、パルス計数装置34で計数され
る。
The pulse counting device 34 generates a trigger output only in response to an output signal that satisfies all the setting conditions of each unit gate of the multi-gate circuit 32, which is set using the phase information signal input as a gate signal as a time reference. is counted.

検出インピーダンス6の両端にノイズ性パルスにより電
位差が生じても、マルチゲート回路32の設定条件を満
たさないので、パルス計数装置34で計数されず、部分
放電パルスのみがパルス計数装置34で計数される。
Even if a potential difference occurs due to a noisy pulse across the detection impedance 6, it does not satisfy the setting conditions of the multi-gate circuit 32, so it is not counted by the pulse counting device 34, and only partial discharge pulses are counted by the pulse counting device 34. .

〔発明の効果〕〔Effect of the invention〕

本発明によると、電力サービスを中断しないで部分放電
測定を実行することができる。また、部分放電測定の際
電力ケーブルに課電するための専用の機器を必要としな
い。
According to the invention, partial discharge measurements can be performed without interrupting power service. Furthermore, no special equipment is required to apply electricity to the power cable when measuring partial discharge.

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

第1図は本発明による部分放電測定方法の一実施例に用
いた構成を示すブロックダイアグラム、第2図は部分放
電測定で検出されたパルスおよび課電圧位相情報信号の
波形の例を、第3図は本発明による部分放電測定方法の
他の実施例に用いた構成を示すブロックダイアグラムで
ある。 符号の説明 ■−・・・・・−・・電力ケーブル 1 a−−−−−−一終端接続部の接地シース1b・−
・・接地線 2・−・−−−−−−ケーブル終端部 3−・・−−−−−−−−・高圧課電導体4・−・−・
・・−・−絶縁接続部 4a−・−絶縁筒 5−・−・・−金属箔電極 6−・−一−−−・検出インピーダンス7・−−一−−
−−−−−測定装置 8−・−・−−−−−−CRT 9−・・−・−AM復調器 10−−−−−−・計器用変圧器 11=・〜・・・E10変換器 12・・−−−−−0/E変換器 13−−−−−・・光ファイバ 14・−・−A M変調器 15〜・−高周波鉄心 31−−−−−−一増幅器 32・・−−−−−マルチゲート回路 33〜・〜・・トリガー回路 34・・・・−・パルス計数装置
FIG. 1 is a block diagram showing the configuration used in an embodiment of the partial discharge measurement method according to the present invention, FIG. The figure is a block diagram showing a configuration used in another embodiment of the partial discharge measuring method according to the present invention. Explanation of symbols ■-・・・・・Power cable 1 a −−−−−− Grounding sheath 1 b of the terminal connection part −
・・Grounding wire 2・−・−−−−−−Cable end portion 3−・・−−−−−−−・High voltage charging conductor 4・−・−−・
...--Insulated connection part 4a--Insulating tube 5--Metal foil electrode 6---1--Detection impedance 7--1--
------ Measuring device 8 ------- CRT 9 ---- AM demodulator 10 --- Instrument transformer 11 = --- E10 conversion equipment 12...---0/E converter 13-----optical fiber 14----A M modulator 15~--high frequency core 31-----Amplifier 32.・---Multi-gate circuit 33~・~・Trigger circuit 34・・・Pulse counting device

Claims (3)

【特許請求の範囲】[Claims] (1)活線下の電力ケーブル線路から高周波パルスを検
出し、 前記電力ケーブル線路に課電されている電圧の位相を検
出し、 前記位相が所定の位相にあるときに検出された前記高周
波パルスを前記電力ケーブル線路の部分放電信号として
判定することを特徴とする、部分放電測定方法。
(1) Detecting a high frequency pulse from a power cable line under a live line, detecting the phase of the voltage applied to the power cable line, and detecting the high frequency pulse when the phase is at a predetermined phase. A partial discharge measuring method, characterized in that: is determined as a partial discharge signal of the power cable line.
(2)前記電圧の位相は、前記電力ケーブル線に接続さ
れた計器用変圧器、検電端子、気中送電線路の対地静電
容量および配電用変圧器から選択された一つの手段を介
して検出され、 前記所定の位相は、前記電圧の位相が絶対値において最
大値になる位相およびその位相の近辺を含んだそれより
若干進んだ位相である、請求項第1項記載の部分放電測
定方法。
(2) The phase of the voltage is determined through one means selected from the voltage transformer connected to the power cable line, the voltage detection terminal, the ground capacitance of the aerial power transmission line, and the distribution transformer. 2. The partial discharge measuring method according to claim 1, wherein the predetermined phase is detected, and the predetermined phase is a phase at which the phase of the voltage reaches a maximum absolute value and a phase slightly advanced from the phase including the vicinity of the phase. .
(3)前記電圧の位相は、前記電力ケーブル線路を介し
て部分放電測定地点まで伝送される請求項第2項記載の
部分放電測定方法。
(3) The partial discharge measuring method according to claim 2, wherein the phase of the voltage is transmitted to a partial discharge measuring point via the power cable line.
JP2043856A 1990-02-23 1990-02-23 Partial discharge measurement method Expired - Fee Related JP2564956B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2043856A JP2564956B2 (en) 1990-02-23 1990-02-23 Partial discharge measurement method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2043856A JP2564956B2 (en) 1990-02-23 1990-02-23 Partial discharge measurement method

Publications (2)

Publication Number Publication Date
JPH03246473A true JPH03246473A (en) 1991-11-01
JP2564956B2 JP2564956B2 (en) 1996-12-18

Family

ID=12675351

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2043856A Expired - Fee Related JP2564956B2 (en) 1990-02-23 1990-02-23 Partial discharge measurement method

Country Status (1)

Country Link
JP (1) JP2564956B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003075501A (en) * 2001-06-22 2003-03-12 Showa Electric Wire & Cable Co Ltd Partial discharge detecting method and partial discharge detector used for it
CN104297605A (en) * 2014-10-30 2015-01-21 云南省送变电工程公司 Ultrahigh-voltage live-working insulation safety instrument test system and method
JP6925076B1 (en) * 2020-12-18 2021-08-25 センスネットシステム株式会社 Detection device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6415670A (en) * 1987-07-09 1989-01-19 Toshiba Corp Internal partial discharge detection system of gas insulated switch apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6415670A (en) * 1987-07-09 1989-01-19 Toshiba Corp Internal partial discharge detection system of gas insulated switch apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003075501A (en) * 2001-06-22 2003-03-12 Showa Electric Wire & Cable Co Ltd Partial discharge detecting method and partial discharge detector used for it
CN104297605A (en) * 2014-10-30 2015-01-21 云南省送变电工程公司 Ultrahigh-voltage live-working insulation safety instrument test system and method
CN104297605B (en) * 2014-10-30 2017-04-19 云南省送变电工程公司 Ultrahigh-voltage live-working insulation safety instrument test system and method
JP6925076B1 (en) * 2020-12-18 2021-08-25 センスネットシステム株式会社 Detection device

Also Published As

Publication number Publication date
JP2564956B2 (en) 1996-12-18

Similar Documents

Publication Publication Date Title
WO1997034159A1 (en) A method and a device for space-charge measurement in cables using a pulsed electroacoustic method
US6420879B2 (en) System and method for measurement of partial discharge signals in high voltage apparatus
Heizmann et al. On-site partial discharge measurements on premoulded cross-bonding joints of 170 kV XLPE and EPR cables
JPH03246473A (en) Partial discharge measuring method
JPH08152453A (en) Measuring method for partial discharge
JP3087969B2 (en) Partial discharge measurement method
JP2774645B2 (en) Partial discharge detector
JP2960782B2 (en) Partial discharge measurement method
JPS61173175A (en) Partial discharge monitor device for high-voltage apparatus
JPH05107301A (en) Partial discharge detecting method for power cable and device for the same
JP3126392B2 (en) Partial discharge detector for gas insulated switchgear
JP2002196030A (en) Method for diagnosing deterioration of power cable
JP3126391B2 (en) Partial discharge detector
JP2774649B2 (en) Partial discharge detector
JPH09211063A (en) Method and apparatus for injecting calibration pulse
JPS6069570A (en) Impulse corona detector of stationary electric apparatus
JPH01285868A (en) Apparatus for inspecting trouble of power machinery
JPH08178997A (en) Partial discharge measuring method for power cable
JPH0353583B2 (en)
JPH09211058A (en) Method and device for detecting earth voltage surge
JPH0619413B2 (en) Partial discharge measurement method
JPH04299050A (en) Rotary electric machine
JP2871189B2 (en) Insulation diagnostic equipment
JPH02167483A (en) Measuring method for partial discharge
JPS6189566A (en) Apparatus for discriminating phase of high voltage distribution line

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees