JP2013113837A - Sensor for detecting corona discharge, portable measuring device, and measuring method - Google Patents
Sensor for detecting corona discharge, portable measuring device, and measuring method Download PDFInfo
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- JP2013113837A JP2013113837A JP2011270646A JP2011270646A JP2013113837A JP 2013113837 A JP2013113837 A JP 2013113837A JP 2011270646 A JP2011270646 A JP 2011270646A JP 2011270646 A JP2011270646 A JP 2011270646A JP 2013113837 A JP2013113837 A JP 2013113837A
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Abstract
Description
本発明は、コロナ放電の微弱な電流を検知し電気機器の絶縁劣化を早期に発見し電気／電子機器の修理や交換時期を予測させ突然の故障や停電を未然に防ぐため役立つコロナ放電検知測定器を提供する。The present invention detects a weak current of corona discharge, detects insulation deterioration of electrical equipment at an early stage, predicts repair / replacement time of electrical / electronic equipment, and prevents coronary discharge detection and power failure. Provide a bowl.
電気機器の中には経年劣化が進み、製品寿命を過ぎていても交換されることなく稼動しているものも有る。
その為、数多くの電気機器が突然絶縁破壊を起こし故障し、場合によっては、波及事故に発展し、広域停電に至り、復旧に長時間を要する事もある。
最近、電力供給がひっ迫している中でこのような停電や、発送電のトラブルは極めて社会的影響が大きいため電気設備技術者の日常点検は重要度を増している。Some electrical devices have deteriorated over time, and some have been operated without being replaced even after the product lifetime has passed.
As a result, many electrical devices suddenly break down and break down, and in some cases, they develop into spillovers, leading to wide-area power outages, which can take a long time to recover.
In recent years, power supply is tight, and such power outages and problems with dispatched power have a great social impact, so daily inspections of electrical equipment engineers are becoming increasingly important.
日常点検や定期点検する場合は、現状ある電気機器測定器で測定し判断している。
しかし、コロナ放電劣化を簡単に、しかも電気を通電中（機器稼働中）に測定することが出来ないのが現状である。For daily and periodic inspections, measurements are made using existing electrical equipment measuring instruments.
However, the current situation is that it is not possible to measure the deterioration of corona discharge easily and while electricity is being supplied (during operation of the equipment).
稼働中の電気機器のコロナ放電検知方法は数種類有るが、いづれも携帯型検知機ではない。一般的には重要設備機器の常時監視用として検査機器も工場などに設置されているものがほとんどである。従って日常点検時に携帯出来き、活線状態で放電検知が出来ることが望まれている。There are several methods for detecting corona discharge in electrical equipment in operation, but none are portable detectors. In general, most inspection equipment is installed in factories or the like for continuous monitoring of important equipment. Therefore, it is desired that it can be carried at the time of daily inspection and can detect discharge in a live state.
一部に携帯型コロナ放電検知機が有るが、ケーシング内に納められた電気機器の放電電圧の変化をケーシングにセンサーを接触検知するやり方である。
本来は、設備検査技術者が行っている騒音測定などで不特定多数の機器の中から異音発生箇所を探し当てるようにコロナ放電発生箇所を探し出せる測定器が望まれている。 （以下、電気・電子機器収納箱をケーシングと称する）There is a portable corona discharge detector in part, but it is a method of detecting a change in the discharge voltage of an electric device housed in the casing by contacting the sensor with the casing.
Originally, there is a demand for a measuring device that can find a corona discharge occurrence location so that an abnormal noise occurrence location can be found from an unspecified number of devices in noise measurement performed by equipment inspection engineers. (Hereinafter, the electrical / electronic device storage box is referred to as a casing)
電気設備には欠くことの出来ない電源盤や分電盤に組み込まれているブレーカーや避雷器等の点検は、盤の扉を開けて機器の異常の有無を調査しなければならない。
この時、コロナ放電が発生していないかを盤類の外部から、近づけるか接触することで判定できるセンサーが望まれている。
ちなみにブレーカーや避雷器の外装は樹脂製であるからここから放電する現象を検知出来るセンサーを持った測定器が望まれている。Inspecting circuit breakers and lightning arresters installed in power boards and distribution boards, which are indispensable for electrical equipment, must open the doors of the boards and investigate whether there are any malfunctions.
At this time, there is a demand for a sensor that can determine whether corona discharge has occurred from the outside of the panel by approaching or contacting it.
By the way, since the exterior of the breaker and lightning arrester is made of resin, a measuring instrument with a sensor that can detect the phenomenon of discharge from here is desired.
電源盤の検査で、避雷器が正常かどうかの判定はアース線に漏れ電流が発生して無いかを測定する。しかし、近年避雷器も酸化亜鉛式からギャップ式も混在する状況になっているので、漏電検知だけでなく、コロナ放電しているか否かも故障判定に加えることが望ましい。In the inspection of the power supply panel, whether or not the lightning arrester is normal is measured by checking whether there is any leakage current in the ground wire. However, since lightning arresters and zinc oxide type to gap type are also mixed in recent years, it is desirable to add not only leakage detection but also whether or not corona discharge has occurred to failure determination.
トランスの劣化を調査する為には、電気を止めてトランスの中の油を抜き取り成分分析し劣化具合判定している。電気を止めずにもっと簡単に劣化診断出来る測定器が望まれている。ＯＦケーブルでも同じ要望がある。In order to investigate the deterioration of the transformer, electricity is turned off, the oil in the transformer is extracted, the components are analyzed, and the degree of deterioration is judged. There is a need for a measuring instrument that can more easily diagnose deterioration without turning off electricity. The same demand exists for OF cables.
電力ケーブルは、ピットなどにおいて、多数敷設されており、その中から電力ケーブルのどこから放電現象を起こしているか特定するのは非常に難しい。
その難しい初期の放電現象を検知出来る測定器が望まれている。A large number of power cables are laid in a pit or the like, and it is very difficult to specify from where the discharge phenomenon occurs in the power cable.
A measuring instrument that can detect the difficult initial discharge phenomenon is desired.
前述の背景技術の鑑みて、従来のコロナ放電測定においてはコロナ放電電流をコンデンサで積分することによるその電荷量を測定する方式のため、重要な周波数特性が消滅することで測定感度が低下し、電源ノイズなどの問題で制約が大きく現地での測定が難しい。本発明は、コロナ放電から発生する高周波電流をケーシングの材質に無関係に高感度で検出する測定方法を提供するIn view of the above-mentioned background art, in the conventional corona discharge measurement, because the charge amount is measured by integrating the corona discharge current with a capacitor, the measurement sensitivity is lowered by the disappearance of an important frequency characteristic, There are many restrictions such as power supply noise, making it difficult to measure locally. The present invention provides a measurement method for detecting high-frequency current generated from corona discharge with high sensitivity regardless of the material of the casing.
本発明は、従来以上の高感度なセンサーなので、初期のコロナ放電劣化がある電気機器を多数の機器の中から特定出来る測定器である。
これによりコロナ放電で絶縁劣化が進展し、突然の停電などを未然に防ぐことが出来ることとなる。Since the present invention is a sensor having a higher sensitivity than before, it is a measuring instrument that can identify an electrical device having an initial corona discharge deterioration from a number of devices.
As a result, the deterioration of the insulation progresses due to the corona discharge, and a sudden power failure can be prevented in advance.
ケーシングが絶縁性材質ないしは、ケーシングがない場合
図１において、コロナ放電電流：６は、矢印に示すようにコロナ放電点：３から放出された１０〜４０ＭＨｚの高周波電流は、コロナ放電点：３とケーシング：１の内面で構成されるコンデンサー：４、ケーシング自体のコンデンサー：７、ケーシング：１の外壁と感電防止用保護絶縁板（アダプターを兼ねる。以下アダプターと称する）：１６間に構成されるコンデンサ：１４、アダプターのインピーダンス：Ｚｆを経由してコロナ放電検出器のプローブ：９で受信され、当該検出器を通り、プローブ：１０、アダプターのインピーダンスＺｆ、コンデンサ：１５→８→５を経由してコロナ放電発生点：３のコロナ放電エネルギーの供給点に戻る。
ケーシングが金属製の場合
図２の場合は、ケーシングが鋼材など金属材料で構成されているため、コロナ放電電流は、ケーシングの外面からは、大気中に電気力線が放出されないため、コロナ放電検出器のプローブ９，１０は、ケーシングに直接接触させるか必要があり、コロナ放電電流：６のコロナ放電検出器への電流ルートは、コロナ放電点：３→４→７（ケーシングの塗装を含むインピーダンス：ｚ）→プローブ：９で受信→プローブ：１０→８→５→コロナ放電発生点：３のエネルギー供給点に戻る
この場合でも、アダプターを使用して検出は可能であり、アダプターは、ケーシングの外壁に密着させることで達成できる。
構成としては、図１のコンデンサ：１４、１５が無い状態と同じになる。In the case where the casing is not made of an insulating material or has no casing, in FIG. 1, the corona discharge current: 6 indicates that the high frequency current of 10 to 40 MHz emitted from the corona discharge point: 3 is the corona discharge point: 3 Casing: Capacitor composed of the inner surface of the casing: 4, Capacitor of the casing itself: 7, Casing: The outer wall of the casing 1 and a protective insulating plate for preventing electric shock (also serving as an adapter; hereinafter referred to as adapter): Capacitor configured between 16 : 14, adapter impedance: via Zf, probe of corona discharge detector: 9 is received and passes through the detector, probe: 10, adapter impedance Zf, capacitor: 15 → 8 → 5 Corona discharge occurrence point: Return to the supply point of 3 corona discharge energy.
When the casing is made of metal In the case of FIG. 2, since the casing is made of a metal material such as steel, the corona discharge current is detected from the outer surface of the casing, since electric lines of force are not released into the atmosphere. The
The configuration is the same as the state without the
早期に放電現象を検知する必要な電気設備としては、受変電設備をはじめ、被服された
電線／ケーブル、発電機、モータ、直撃雷保護用の避雷器等また、電子機器がある。
感電防止用保護絶縁版：１６は、検出のためのアダプターとしての機能も有し、センサーとセットとして被検出体に近づけることによる電界分布を変えることなく測定できる機能を有している。
コロナ放電検出対象電気・電子機器装置の外形構造に則したアダプターを構成することで検出の確度を保障できる。Electrical equipment that needs to detect the discharge phenomenon at an early stage includes receiving / transforming equipment, covered wires / cables, generators, motors, lightning arresters for direct lightning protection, and other electronic devices.
The
The accuracy of detection can be assured by configuring an adapter that conforms to the external structure of the electrical / electronic device device subject to corona discharge detection.
１電気・電子機器のケーシング
２電気・電子機器本体
３コロナ放電発生源
４コロナ放電発生源とケーシング間の静電容量（外部浮遊容量）
５コロナ放電発生源とケーシング間の静電容量（外部浮遊容量）
６コロナ放電電流：Ｉ
７ケーシングのインピーダンス
図１：絶縁性ケーシングの場合は、コンデンサ
図２：金属製ケーシングの場合は、インピーダンス
８ケーシングのインピーダンス
図１：絶縁性ケーシングの場合は、コンデンサ
図２：金属製ケーシングの場合は、インピーダンス
９コロナ放電電流検出器のプローブ端子：Ａ
１０コロナ放電電流検出器のプローブ端子：Ｂ
１１コロナ放電電流検出コイル
１２コロナ放電検出器
１３コロナ放電電流受信回路及び表示回路
１４電気・電子機器用ケーシングと感電防止用保護絶縁板間の静電容量
１５電気・電子機器用ケーシングと感電防止用保護絶縁板間の静電容量
１６感電防止用保護絶縁板：インピーダンス
Ｚｆとし、コロナ放電電流の検出用アダプターを兼ねる。1 Electrical /
5Capacitance between corona discharge source and casing (external stray capacitance)
6 corona discharge current: I
7 Impedance of casing Fig. 1: Capacitor in the case of insulating casing Fig. 2: Impedance of casing 8 in the case of metal casing Fig. 1: Capacitor in the case of insulating casing Fig. 2: In the case of metallic casing , Impedance 9 Corona discharge current detector probe terminal: A
Probe terminal of 10 corona discharge current detector: B
11 Corona discharge
Claims (2)
センサーから入力されるアナログ信号をデジタル信号に変換するＡ／Ｄ変換器を有し、表示部に放電電流の強弱を多段階に切り替えて表示出来る携帯型測定器。A portable measuring instrument that can detect changes in the discharge current in the atmosphere with the above sensor and detect the source of discharge from an unspecified number of electrical devices.
A portable measuring instrument that has an A / D converter that converts an analog signal input from a sensor into a digital signal, and that can display the intensity of the discharge current in multiple stages on the display.
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| JP2011270646A JP2013113837A (en) | 2011-11-24 | 2011-11-24 | Sensor for detecting corona discharge, portable measuring device, and measuring method |
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| JP2011270646A JP2013113837A (en) | 2011-11-24 | 2011-11-24 | Sensor for detecting corona discharge, portable measuring device, and measuring method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103901329A (en) * | 2014-04-11 | 2014-07-02 | 国家电网公司 | Method for determining corona discharge ultraviolet detection sensitivity of high-voltage electrical equipment |
| CN107991526A (en) * | 2017-11-17 | 2018-05-04 | 广西电网有限责任公司防城港供电局 | A kind of transmission line lightning stroke monitors system |
| CN109884570A (en) * | 2017-12-07 | 2019-06-14 | 广东电网有限责任公司东莞供电局 | A kind of electronic current lift |
-
2011
- 2011-11-24 JP JP2011270646A patent/JP2013113837A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103901329A (en) * | 2014-04-11 | 2014-07-02 | 国家电网公司 | Method for determining corona discharge ultraviolet detection sensitivity of high-voltage electrical equipment |
| CN107991526A (en) * | 2017-11-17 | 2018-05-04 | 广西电网有限责任公司防城港供电局 | A kind of transmission line lightning stroke monitors system |
| CN107991526B (en) * | 2017-11-17 | 2020-05-05 | 广西电网有限责任公司防城港供电局 | Transmission line monitoring system that is struck by lightning |
| CN109884570A (en) * | 2017-12-07 | 2019-06-14 | 广东电网有限责任公司东莞供电局 | A kind of electronic current lift |
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