JPH0484778A - Measurement of partial electric discharge - Google Patents
Measurement of partial electric dischargeInfo
- Publication number
- JPH0484778A JPH0484778A JP19970090A JP19970090A JPH0484778A JP H0484778 A JPH0484778 A JP H0484778A JP 19970090 A JP19970090 A JP 19970090A JP 19970090 A JP19970090 A JP 19970090A JP H0484778 A JPH0484778 A JP H0484778A
- Authority
- JP
- Japan
- Prior art keywords
- calibration pulse
- calibration
- partial discharge
- power cable
- detection
- 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
- 238000005259 measurement Methods 0.000 title claims description 10
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 230000035945 sensitivity Effects 0.000 claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 230000000644 propagated effect Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 23
- 239000004020 conductor Substances 0.000 abstract description 13
- 239000011888 foil Substances 0.000 abstract description 8
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 abstract description 3
- 229920002554 vinyl polymer Polymers 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 3
- 239000003990 capacitor Substances 0.000 description 8
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 8
- 206010014357 Electric shock Diseases 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 208000033978 Device electrical impedance issue Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電力ケーブル線路における部分放電測定方法に
関し、特に、活線状態でも測定感度の精度のよい較正が
行え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 in a power cable line, and more particularly to a partial discharge measuring method that allows highly accurate calibration of measurement sensitivity even in a live line state.
［背景技術］
従来多く用いられた部分放電測定方法は、第２図（Ａ）
に示すように、電力ケーブル２１の終端接続部２２で、
高電圧課電端子２３にインダクタンスより成る高周波信
号阻止回路２４を介して接続された高圧導体２５とアー
スとの間に結合コンデンサ２６と検出インピーダンス２
７を直列に接続し、検出インピーダンス２７の両端に生
じる電位差、特に高周波成分を、並列に接続された測定
装置２９を用いて測定するか、第２図（Ｂ）に示すよう
に、高圧導体２５とアースとの間に結合コンデンサ２６
を接続し、電力ケーブル２１の普通接続部２８等におい
て金属シース２１ａとアースの間に検出インピーダンス
２７を挿入して、その両端に生じる電位差を、測定装置
２９を用いて測定する方法である。[Background technology] The partial discharge measurement method that has been widely used in the past is shown in Figure 2 (A).
As shown in FIG.
A coupling capacitor 26 and a detection impedance 2 are connected between the high voltage conductor 25 connected to the high voltage charging terminal 23 via a high frequency signal blocking circuit 24 made of an inductance and the ground.
7 are connected in series and the potential difference, especially the high frequency component, generated across the detection impedance 27 is measured using a measuring device 29 connected in parallel, or as shown in FIG. A coupling capacitor 26 between
In this method, a detection impedance 27 is inserted between the metal sheath 21a and the ground at the normal connection part 28 of the power cable 21, and the potential difference generated between the two ends is measured using a measuring device 29.
実際の部分放電測定においては、測定系各部の漂遊容量
やパルスに対する応答性等が正確に分からないので、そ
れらを定量的に把握するため較正を行う。第２図（Ａ）
および（Ｂ）に示した構成でそれぞれ較正を行うには通
常、第３図（Ａ）および（Ｂ）に示すように、高圧導体
２５と終端接続部の金属シース２１ｂの間に較正用コン
デンサ３１を介して較正用パルス発生器３２を接続して
、較正パルスとして既知の放電電荷を注入し、見掛けの
放電電荷量を測定装置２９で測定する。In actual partial discharge measurements, the stray capacitance of each part of the measurement system, the response to pulses, etc. cannot be accurately known, so calibration is performed to quantitatively understand them. Figure 2 (A)
In order to perform calibration with the configurations shown in FIGS. 3A and 3B, a calibration capacitor 31 is normally placed between the high voltage conductor 25 and the metal sheath 21b of the terminal connection. A calibration pulse generator 32 is connected via the calibrating pulse generator 32, a known discharge charge is injected as a calibration pulse, and the apparent amount of discharge charge is measured by the measuring device 29.
この方法では高圧導体に直接較正パルスを注入するため
、後述のように安全性に問題があること、また部分放電
は接続部付近で発生することが多いので、較正用パルス
を接続部またはその付近から行うのが望ましいことから
、本願出願人は特願平１−２７７９２８号において、絶
縁接続部またはその付近から較正パルスを較正用パルス
発生器を用いて注入し、近隣の他の接続部に設けた検出
部の検出感度を較正する方法を提案した。This method involves injecting the calibration pulse directly into the high-voltage conductor, which poses safety issues as described below, and because partial discharges often occur near the connection, the calibration pulse is injected at or near the connection. Since it is desirable to perform the calibration from We proposed a method to calibrate the detection sensitivity of the detector.
〔発明が解決しようとする課題〕
しかし、上記第３図（Ａ）および（Ｂ）に示した方法で
は、較正パルスを注入するためには高圧導体とシースの
間に較正用コンデンサを介して較正用パルス発生器を接
続することが必要とされるため、線路の課電を停止しな
ければならないから、活線状態での較正はできない。較
正用パルスの注入だけでなく、活線状態では検出インピ
ーダンスの挿入にも感電の危険が伴う。何故なら、高圧
導体に接続された結合コンデンサのアース側に検出イン
ピーダンスを挿入するか、あるいは金属シースの接地線
を一旦取り外して検出インピーダンスを取り付けなけれ
ばならないからである。[Problem to be Solved by the Invention] However, in the method shown in FIG. Calibration under live line conditions is not possible because the line must be de-energized because it requires the connection of a pulse generator. Not only the injection of calibration pulses but also the insertion of a detection impedance in live line conditions carries the risk of electric shock. This is because the detection impedance must be inserted into the ground side of the coupling capacitor connected to the high voltage conductor, or the metal sheathed ground wire must be removed and the detection impedance installed.
上記特願平１−２７７９２８号で提案された方法は、活
線時、課電停止時、いずれでも較正が可能であるが、絶
対値の較正ができるのは絶縁接続部での検出感度だけで
あり、終端接続部における検出感度について絶対値の較
正をする手段は提案されていない。The method proposed in the above-mentioned Japanese Patent Application No. 1-277928 allows calibration both when the line is live and when the power is not applied, but the absolute value can only be calibrated using the detection sensitivity at the insulated connection. However, no means has been proposed for calibrating the absolute value of the detection sensitivity at the terminal connection.
それ故、本発明の目的は、感電の危険を伴わすに活線状
態での較正ができる部分放電測定方法を実現することで
ある。It is therefore an object of the present invention to provide a method for measuring partial discharges that allows calibration under live conditions without the risk of electric shock.
本発明の他の目的は、終端接続部における検出感度につ
いて絶対値の較正ができる部分放電測定方法を実現する
ことである。Another object of the present invention is to realize a partial discharge measuring method capable of calibrating the absolute value of detection sensitivity at a terminal connection.
〔課題を解決するための手段］
本発明では、感電の危険を伴わずに活線状態で終端接続
部における検出感度の較正ができる部分放電測定方法を
実現するため、部分放電測定器を接続した検出インピー
ダンスを終端接続部に設け、近隣の絶縁接続部から較正
用パルスを注入し、電力ケーブル線路を伝播した較正用
パルスを部分放電測定器で測定することにより部分放電
測定の検出感度を較正し、較正用パルスの注入を停止し
て部分放電を測定するようにした。[Means for Solving the Problems] In the present invention, in order to realize a partial discharge measuring method that can calibrate detection sensitivity at a terminal connection in a live line state without the risk of electric shock, a partial discharge measuring device is connected. The detection sensitivity of partial discharge measurement is calibrated by installing a detection impedance at the terminal connection, injecting a calibration pulse from a nearby insulated connection, and measuring the calibration pulse propagated through the power cable line with a partial discharge measuring device. , the injection of the calibration pulse was stopped and the partial discharge was measured.
部分放電測定器は、低周波法、高周波法、広帯域法、同
調法等のいずれの方式のものでもよい。The partial discharge measuring device may be of any type, such as a low frequency method, a high frequency method, a broadband method, or a tuning method.
しかし、特願平２−４２１７５号記載のごとく広帯域法
と同調法を組み合わせたものが、高いＳ／Ｎ比を得られ
るので好ましい。However, a combination of a broadband method and a tuning method as described in Japanese Patent Application No. 2-42175 is preferable because a high S/N ratio can be obtained.
近隣の絶縁接続部としては、終端接続部に隣接する絶縁
接続部が好ましいが、隣接の絶縁接続部よりも離れた絶
縁接続部であっても、充分なＳ／Ｎ比が得られれば利用
できる。As a nearby insulated connection, an insulated connection adjacent to the termination connection is preferable, but an insulated connection that is further away than the adjacent insulated connection can also be used if a sufficient S/N ratio is obtained. .
近隣の絶縁接続部から較正用パルスを注入するには、前
述の特願平１−２７７９２８号に示したように、絶縁筒
を隔てた両側のケーブルの絶縁シースの外面に設けた一
対の箔状電極を用いることができる。電力ケーブルがワ
イヤシールドケーブルである場合には、特願平１−３０
９７４４号記載のごとく、ケーブルに１ないし数十回巻
いたコイル、ケーブルに接近して設けた高周波鉄心に巻
いたコイル、あるいはケーブル上で長さ方向に適当な距
離を隔てて設けた一対の箔状（または帯状）の電極等に
より、較正用パルスを注入することができる。In order to inject a calibration pulse from a nearby insulated connection, as shown in the above-mentioned Japanese Patent Application No. 1-277928, a pair of foil-like Electrodes can be used. If the power cable is a wire shield cable, Japanese Patent Application No. 1-30
As described in No. 9744, a coil wound one to several tens of times around the cable, a coil wound around a high-frequency core placed close to the cable, or a pair of foils placed at an appropriate distance along the length of the cable. Calibration pulses can be injected using a shaped (or strip-shaped) electrode or the like.
測定用閉回路を形成するために高圧導体とアース間に結
合コンデンサを接続してもよいが、これを省略すること
もでき、その場合には終端接続部に接続された気中布設
の高圧導体と対地間に形成される対地静電容量を利用し
て、測定用閉回路が形成される。A coupling capacitor may be connected between the high-voltage conductor and earth to form a closed circuit for measurement, but this can also be omitted, in which case the high-voltage conductor installed in the air connected to the termination A closed circuit for measurement is formed using the ground capacitance formed between the ground and the ground.
終端接続部に検出インピーダンスおよび部分放電測定器
を設けるには、金属シースとアースの間に接続してもよ
い・。しかし、特願平１−３１４００５号に記載された
ように、検出インピーダンスを接地リード線と並列に接
続してもよく、あるいは検出インピーダンスを接続部近
傍の電力ケーブルの防食シース層の外側に設けた箔状電
極に接続して、大地との間の電位差を測定してもよい。To provide a detection impedance and partial discharge meter at the termination connection, a connection may be made between the metal sheath and earth. However, as described in Japanese Patent Application No. 1-314005, the sensing impedance may be connected in parallel with the ground lead, or the sensing impedance may be provided outside the anti-corrosion sheath layer of the power cable near the connection point. It may also be connected to a foil electrode to measure the potential difference between it and the ground.
このようにすると感電の危険が取り除かれ、活線でも較
正および測定が可能になる。検出インピーダンスを接地
リード線と並列に接続する場合、接地リード線には鉄心
を取りつけることが好ましい。This eliminates the risk of electric shock and allows calibration and measurements even on live lines. When the detection impedance is connected in parallel with the ground lead wire, it is preferable to attach an iron core to the ground lead wire.
検出インピーダンスをコンデンサを介して接地リード線
に接続してもよい。接地リード線にシースアレスタが並
列に接続されていてもよい。この場合シースアレスタの
金属シース側リード線にも鉄心を取り付けてもよい。検
出インピーダンスは、シースアレスタのシース側リート
線に高周波変成器を介して接続されてもよい。箔状電極
を用いる場合にも、接地リード線には鉄心を取りつける
ことが好ましい。The sensing impedance may be connected to the ground lead through a capacitor. A sheath arrester may be connected in parallel to the ground lead. In this case, the iron core may also be attached to the metal sheath side lead wire of the sheath arrester. The detection impedance may be connected to the sheath side lead wire of the sheath arrester via a high frequency transformer. Even when using a foil electrode, it is preferable to attach an iron core to the ground lead wire.
本発明の部分放電測定器では、部分放電測定器を接続し
た検出インピーダンスを終端接続部に設け、近隣の絶縁
接続部から較正用パルスを注入し、電力ケーブル線路を
伝播した較正用パルスを部分放電測定器で測定すること
により、部分放電測定の検出感度を較正した上で、較正
用パルスの注入を停止して部分放電を測定するようにし
たので、上の較正の結果に基づいて、較正用パルスを注
入した絶縁接続部と終端接続部との間の電力ケーブル線
路の減衰特性を高い精度で推定することができる。その
結果、終端接続部における検出感度について、実質的に
絶対値の較正ができる。終端接続部の高圧導体に較正用
発振器を接続することなく、近隣の絶縁接続部から較正
用パルスを注入するので、感電の危険を伴わずに活線状
態での較正ができる。In the partial discharge measuring device of the present invention, a detection impedance connected to the partial discharge measuring device is provided at the terminal connection, a calibration pulse is injected from the nearby insulated connection, and the calibration pulse propagated through the power cable line is used to generate partial discharge. After calibrating the detection sensitivity of partial discharge measurement by measuring with a measuring instrument, we stopped injection of the calibration pulse and measured partial discharge. The attenuation characteristics of the power cable line between the pulse-injected insulated connection and the termination connection can be estimated with high accuracy. As a result, it is possible to substantially calibrate the absolute value of the detection sensitivity at the terminal connection. Since a calibration pulse is injected from a nearby insulated connection without connecting a calibration oscillator to the high-voltage conductor at the termination connection, calibration can be performed in a live line state without the risk of electric shock.
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.
第１図に、本発明による部分放電測定方法に用いる構成
の一例を示す。FIG. 1 shows an example of a configuration used in the partial discharge measuring method according to the present invention.
電力ケーブル１の終端接続部２は、高圧導体３を介して
図示しない変電所機器に接続されている。A terminal connection portion 2 of the power cable 1 is connected to substation equipment (not shown) via a high voltage conductor 3.
電力ケーブル１は終端接続部２番こ隣接する絶縁接続部
４を有しており、防食ビニルシース５，５の外面に一対
の箔状電極６．６が取り付けられ、箔状電極６，６に較
正用パルス発生器７が接続されている。終端接続部２の
アース側は接地リード線８で接地され、接地リードＩ５
！８には高周波鉄心９゜９が取り付けられている。そし
て、接地リード線８の高周波鉄心９，９が取り付けられ
た部分と並列に、検出インピーダンス１０が接続されて
いる。The power cable 1 has an insulated connection part 4 adjacent to the terminal connection part 2, and a pair of foil electrodes 6.6 are attached to the outer surface of the anticorrosive vinyl sheaths 5, 5, and the foil electrodes 6, 6 are calibrated. A pulse generator 7 for use is connected. The ground side of the terminal connection part 2 is grounded by the ground lead 8, and the ground lead I5
! A high frequency iron core 9°9 is attached to 8. A detection impedance 10 is connected in parallel to the portion of the ground lead wire 8 to which the high frequency cores 9, 9 are attached.
検出インピーダンス１０には部分放電測定器１１が接続
されている。A partial discharge measuring device 11 is connected to the detection impedance 10 .
較正用パルス発生器７から箔状電極６．６に供給される
較正用パルスは、電力ケーブル１を経て終端接続部２に
達し、検出インピーダンス１０の両端に電位差を生じ、
部分放電測定器１１で測定される。検出インピーダンス
１０と並列に接続された接地リード線８は、高周波鉄心
９．９により高周波インピーダンスが高められており、
検出インピーダンス１０には充分な電位差が発生する。The calibration pulse supplied from the calibration pulse generator 7 to the foil electrode 6.6 passes through the power cable 1 and reaches the terminal connection 2, creating a potential difference across the detection impedance 10.
It is measured by a partial discharge measuring device 11. The ground lead wire 8 connected in parallel with the detection impedance 10 has high frequency impedance increased by the high frequency iron core 9.9.
A sufficient potential difference is generated in the detection impedance 10.
終端接続部２の検出インピーダンス１０に達した較正用
パルスは、絶縁接続部４と終端接続部２の間の電力ケー
ブル１を経て伝播する間に減衰を受ける。較正用パルス
を部分放電測定器１１で測定した結果から、絶縁接続部
４と終端接続部２との間の電力ケーブルｌの減衰特性を
推定する。The calibration pulse that has reached the detection impedance 10 of the termination connection 2 undergoes attenuation during propagation through the power cable 1 between the insulated connection 4 and the termination connection 2 . The attenuation characteristic of the power cable l between the insulated connection part 4 and the terminal connection part 2 is estimated from the result of measuring the calibration pulse with the partial discharge measuring device 11.
本発明の部分放電測定方法によると、較正用発振器を終
端接続部において高圧導体に接続する必要がなく、また
検出インピーダンスを高圧導体に接続したり、接続部等
の接地線を取り外して検出インピーダンスを挿入する必
要もないので、無謀電状態では勿論、活線状態でも感電
の危険を伴わずに、検出感度の較正ができる。しかも終
端接続部における検出感度について、実質的に絶対値の
較正ができる。According to the partial discharge measurement method of the present invention, there is no need to connect the calibration oscillator to the high voltage conductor at the terminal connection, and it is not necessary to connect the detection impedance to the high voltage conductor or remove the grounding wire at the connection. Since there is no need to insert it, detection sensitivity can be calibrated without the risk of electric shock, not only in recklessly charged conditions but also in live wires. Moreover, it is possible to calibrate the absolute value of the detection sensitivity at the terminal connection.
第１図は、本発明による部分放電測定方法の一実施例に
用いた構成を示す説明図、第２図（Ａ）および（Ｂ）は
従来の部分放電測定方法の説明図、第３図（Ａ）および
（Ｂ）は従来の部分放電測定方法における較正方法の説
明図である。
符号の説明
１−−−−−−−−・−電力ケーブル
２−−−−−−−−−・・終端接続部
３−−−−−一・−高圧導体
４・−・・−・−・−絶縁接続部
５・・−・・−・−防食ビニルシース
６−−−−−−−・・−箔状電極
７−・−−一一−−−−較正用パルス発生器８−一−−
−・−一−−・接地リード線９−・−・−−−−−・高
周波鉄心
１０−−−−−−−−−・・検出インピーダンス１１−
−−−−一・−測定装置
２１−−−−−−−一電力ケーブル
２１ ａ 、 ２ ｌ ｂ−−−−−−−−一金属シ
ース２２−・−一−−−−−−−終端接続部２３−・−
一−−−−−−−高電圧課電端子２４−・−・−−一−
−高周波信号阻止回路２５・−−−−一一−−−−高圧
導体
２６・−・−−−−−・−結合コンデンサ２７−−−−
−−−・・−検出インピーダンス２８−・・−・−普通
接続部
２９−・・−−−−−・測定装置
３１〜・−一一一〜・・−較正用コンデンサ３２−・−
・−較正用パルス発生器FIG. 1 is an explanatory diagram showing a configuration used in an embodiment of the partial discharge measuring method according to the present invention, FIGS. 2(A) and (B) are explanatory diagrams of a conventional partial discharge measuring method, and FIG. A) and (B) are explanatory diagrams of a calibration method in a conventional partial discharge measuring method. Explanation of symbols 1-----Power cable 2-----Terminal connection part 3--High voltage conductor 4----- - Insulated connection part 5 - - Corrosion-proof vinyl sheath 6 - - Foil electrode 7 - - - - - Calibration pulse generator 8 - - −
−・−1−−・Ground lead wire 9−・−・−−−−・High frequency iron core 10−−−−−−−・Detection impedance 11−
----1.-Measuring device 21-----Power cable 21 a, 2 l b-----Metal sheath 22--1---Terminal Connection part 23--
1--------High voltage charging terminal 24------1-
- High frequency signal blocking circuit 25 - - - - High voltage conductor 26 - - - Coupling capacitor 27 - -
--- Detection impedance 28 --- Normal connection section 29 --- Measuring device 31 --- 111 --- Calibration capacitor 32 ---
・-Calibration pulse generator
Claims (2)
終端接続部に設け、前記終端接続部の近隣の絶縁接続部
から較正用パルスを注入し、電力ケーブル線路を伝播し
た前記較正用パルスを前記検出インピーダンスを介して
前記部分放電測定器で測定することにより、部分放電測
定の検出感度を較正し、前記較正用パルスの注入を停止
して部分放電を測定することを特徴とする、部分放電測
定方法。(1) A detection impedance connected to a partial discharge measuring device is provided at the termination connection, a calibration pulse is injected from an insulated connection near the termination connection, and the calibration pulse propagated through the power cable line is detected. A method for measuring partial discharge, characterized in that the detection sensitivity of partial discharge measurement is calibrated by measuring with the partial discharge measuring device via impedance, and the injection of the calibration pulse is stopped to measure the partial discharge. .
地線に高周波鉄心を取り付け、該高周波鉄心を取り付け
た接地線に並列に接続される、請求項第１項の部分放電
測定方法。(2) The partial discharge measuring method according to claim 1, wherein the detection impedance is connected in parallel to the ground wire to which a high frequency iron core is attached to the ground wire of the terminal connection section and the high frequency iron core is attached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19970090A JPH07111452B2 (en) | 1990-07-26 | 1990-07-26 | Partial discharge measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19970090A JPH07111452B2 (en) | 1990-07-26 | 1990-07-26 | Partial discharge measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0484778A true JPH0484778A (en) | 1992-03-18 |
| JPH07111452B2 JPH07111452B2 (en) | 1995-11-29 |
Family
ID=16412162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19970090A Expired - Lifetime JPH07111452B2 (en) | 1990-07-26 | 1990-07-26 | Partial discharge measurement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07111452B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5211262A (en) * | 1991-09-20 | 1993-05-18 | Jatco Corporation | Hydraulic oil supplying apparatus for automatic transmission |
| JP5872106B1 (en) * | 2014-09-17 | 2016-03-01 | 三菱電機株式会社 | Partial discharge signal processor |
-
1990
- 1990-07-26 JP JP19970090A patent/JPH07111452B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5211262A (en) * | 1991-09-20 | 1993-05-18 | Jatco Corporation | Hydraulic oil supplying apparatus for automatic transmission |
| JP5872106B1 (en) * | 2014-09-17 | 2016-03-01 | 三菱電機株式会社 | Partial discharge signal processor |
| WO2016042614A1 (en) * | 2014-09-17 | 2016-03-24 | 三菱電機株式会社 | Partial discharge signal processing device |
| CN106716153A (en) * | 2014-09-17 | 2017-05-24 | 三菱电机株式会社 | Partial discharge signal processing device |
| EP3196662A4 (en) * | 2014-09-17 | 2018-06-20 | Mitsubishi Electric Corporation | Partial discharge signal processing device |
| US10048310B2 (en) | 2014-09-17 | 2018-08-14 | Mitsubishi Electric Corporation | Partial discharge signal processing device |
| CN106716153B (en) * | 2014-09-17 | 2019-07-09 | 三菱电机株式会社 | Signal processing of partial discharge device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07111452B2 (en) | 1995-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5469067A (en) | Detecting partial discharge using a detection coil and analysis of output signal and noise frequency spectrums | |
| US11280849B2 (en) | Method for measuring an impedance of an electric cable, a coupler arrangement and uses thereof | |
| JPH0484778A (en) | Measurement of partial electric discharge | |
| JP3199726B2 (en) | Partial discharge detection device | |
| JP2574580B2 (en) | Partial discharge measurement method | |
| JPH09236630A (en) | Partial discharge measurement method | |
| JP2564956B2 (en) | Partial discharge measurement method | |
| JPH06186277A (en) | Method of testing resonance-type partial-discharge detection apparatus | |
| JPH04331381A (en) | Calibrating method of partial discharge measurement | |
| JPH04320977A (en) | Partial discharge position orientation method | |
| JPH0339670A (en) | Partial discharge measuring method | |
| JPH068845B2 (en) | Partial discharge measurement method | |
| Dakin | Measurement of partial discharges in inductive apparatus: transformers and rotating machines | |
| JPH06308191A (en) | Testing method for resonance type partial discharge detector | |
| JPH02161369A (en) | Measuring method for partial electric discharge | |
| JP2988547B2 (en) | Partial discharge measurement method | |
| JP2504237B2 (en) | Partial discharge measurement method | |
| JPH03170077A (en) | Partial discharge measuring method for wire shield cable | |
| JPH067147B2 (en) | Partial discharge measurement method | |
| JPH02154171A (en) | Measuring method for partial discharge | |
| JPH08285920A (en) | Partial-discharge measuring method | |
| JPH06273472A (en) | Partial discharge detection sensor | |
| JPH067148B2 (en) | Partial discharge measurement method | |
| JPH05256896A (en) | Method for calibrating resonance type partial discharge detector | |
| JPH04351975A (en) | Calibration method for resonance type partially discharging detection apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071129 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081129 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081129 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091129 Year of fee payment: 14 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101129 Year of fee payment: 15 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101129 Year of fee payment: 15 |