JPS63218875A - Diagnosing method of insulation for high-voltage apparatus - Google Patents
Diagnosing method of insulation for high-voltage apparatusInfo
- Publication number
- JPS63218875A JPS63218875A JP5215587A JP5215587A JPS63218875A JP S63218875 A JPS63218875 A JP S63218875A JP 5215587 A JP5215587 A JP 5215587A JP 5215587 A JP5215587 A JP 5215587A JP S63218875 A JPS63218875 A JP S63218875A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- layer
- low
- impressed
- insulation
- 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
- 238000009413 insulation Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 16
- 239000001307 helium Substances 0.000 claims abstract description 16
- 229910052734 helium Inorganic materials 0.000 claims abstract description 16
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004020 conductor Substances 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000006866 deterioration Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 238000004299 exfoliation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、高電圧機器の絶縁診断方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for diagnosing insulation of high voltage equipment.
し従来の技術］
従来、例えば回転機、発電機、変圧機等の高電圧機器の
絶縁診断方法としては、例えば［電気工学ハンドブック
」（電気学会、昭和５３年発行、５９５頁〜５９７頁）
に記載されているように、大気中で高電圧機器に高電圧
を印加し、得られた電気信号から絶縁の欠陥や劣化状況
を把握する方法が知られている。[Prior Art] Conventionally, as an insulation diagnosis method for high voltage equipment such as rotating machines, generators, and transformers, for example, [Handbook of Electrical Engineering] (Institute of Electrical Engineers of Japan, published in 1971, pp. 595-597) is used.
As described in , a method is known in which high voltage is applied to high-voltage equipment in the atmosphere, and insulation defects and deterioration conditions can be ascertained from the electrical signals obtained.
従来の高電圧機器の絶縁診断方法は、特別な密閉容器を
必要としないので非常に簡便である。The conventional method for diagnosing the insulation of high voltage equipment is very simple because it does not require a special sealed container.
［発明が解決しようとする問題点］
しかしながら、上述したような絶縁診断方法では、空気
の放電電圧が比較的高いため、沿面閃絡を起こした時に
高電圧機器自体に大きな損傷を与えたり、絶縁特性測定
装置に破壊信号が侵入してこの測定装置を壊したりする
問題点があった。[Problems to be Solved by the Invention] However, in the above-mentioned insulation diagnosis method, since the air discharge voltage is relatively high, when creeping flash occurs, it may cause major damage to the high voltage equipment itself or damage the insulation. There is a problem in that a destructive signal may enter the characteristic measuring device and destroy the measuring device.
この発明は、このような問題点を解決するためになされ
たもので、沿面閃絡を起こした場合でもそのエネルギー
が小さく、低電圧で絶縁特性を診断できる高電圧機器の
絶縁診断方法を得ることを目的とする。This invention was made in order to solve these problems, and provides a method for diagnosing insulation of high-voltage equipment, in which the energy of creeping flash is small even when it occurs, and the insulation characteristics can be diagnosed at low voltage. With the goal.
［問題点を解決するための手段］
この発明に係る高電圧機器の絶縁診断方法は、ヘリウム
ガス雰囲気下で高電圧機器に高電圧を印加して絶縁特性
を測定するものである。[Means for Solving the Problems] A method for diagnosing the insulation of high voltage equipment according to the present invention involves applying a high voltage to the high voltage equipment in a helium gas atmosphere to measure insulation characteristics.
［作 用］
この発明においては、ヘリウムガス雰囲気下で高電圧機
器の絶縁特性を測定するので、放電電圧が低く、高電圧
機器の欠陥の検出が容易である。[Function] In this invention, since the insulation properties of high voltage equipment are measured in a helium gas atmosphere, the discharge voltage is low and defects in high voltage equipment can be easily detected.
［実施例コ
第１図はこの発明を実施した回転機の固定子コイルを示
す概念図であり、（１）はガス封入容器、（２）はこの
ガス封入容器（１）内に５気圧以下で充填されたヘリウ
ムガス、（３）はガス封入容器（１）内に置かれた高電
圧機器である回転機の固定子コイル、（４）はこの固定
子コイルの固定子鉄心、（５）はこの固定子鉄心（４）
に設けられたスロット、（６）は固定子コイル（３）の
導体、（７）はこの導体（６）を被覆している主絶縁層
、（８）は後述の低抵抗コロナシールド層のコイル端末
側の主絶縁層（７）表面における沿面電位傾度が大きく
なる部分に設けられた電界緩和層、（９）は主絶縁層（
７）の表面に、スロット（５）から引き出されたインボ
リュート部（図示しない）まで導電性塗料を塗布して形
成された低抵抗コロナシールド層である。（１０）はこ
の低抵抗コロナシールド層（９）を検出端とする絶縁特
性測定回路、（１１）は導体（６）に高電圧を印加する
高電圧電源、（１２）は導体（６）に接続された標準コ
ンデンサである。[Example 1] Fig. 1 is a conceptual diagram showing a stator coil of a rotating machine in which the present invention is implemented. (3) is a stator coil of a rotating machine, which is a high-voltage device, placed in a gas enclosure (1), (4) is a stator core of this stator coil, (5) is a helium gas filled with helium gas; This stator core (4)
(6) is the conductor of the stator coil (3), (7) is the main insulation layer covering this conductor (6), and (8) is the coil of the low resistance corona shield layer described later. The electric field relaxation layer (9) is provided on the surface of the main insulating layer (7) on the terminal side where the creeping potential gradient becomes large.
7) is a low-resistance corona shield layer formed by applying a conductive paint to the surface of the slot (5) up to the involute portion (not shown) drawn out from the slot (5). (10) is an insulation property measuring circuit that uses this low resistance corona shield layer (9) as a detection end, (11) is a high voltage power supply that applies high voltage to conductor (6), and (12) is a circuit that applies high voltage to conductor (6). It is a standard capacitor connected.
上述したように構成された高電圧機器の絶縁詮所方法に
おいては、導体（６）に高電圧電源（１１）から高電圧
を印加し、低抵抗コロナシールド層（９）を検出端とし
て絶縁特性測定回路（１ｏ）に信号を送る。高電圧を印
加したとき、第２図に示すように、ヘリウムガスの方が
空気より低い電圧で放電する。従って、主絶縁層（７）
のクラックや低抵抗コロナシールド層（９）の剥がれに
よる固定子鉄心（４）との間のスロット（５）ディスチ
ャージの検出、電界緩和！（８）の吸湿による特性低下
に伴う部分放電等の欠陥が、低い電圧で非常に容易に診
断できる。また、沿面閃絡を起こした場合であっても、
印加電圧が低いのでエネルギーが小さく、主絶縁層（７
）や電界緩和層く８）に与える影響は軽微となる。In the method for insulating high-voltage equipment configured as described above, a high voltage is applied to the conductor (6) from the high-voltage power supply (11), and the insulation properties are measured using the low-resistance corona shield layer (9) as the detection end. Send a signal to the measurement circuit (1o). When a high voltage is applied, helium gas discharges at a lower voltage than air, as shown in FIG. Therefore, the main insulating layer (7)
Detection of discharge in the slot (5) between the stator core (4) due to cracks and peeling of the low-resistance corona shield layer (9), and electric field relaxation! (8) Defects such as partial discharge due to deterioration of characteristics due to moisture absorption can be diagnosed very easily at low voltage. In addition, even if creeping flash occurs,
Since the applied voltage is low, the energy is small and the main insulating layer (7
) and the electric field relaxation layer 8) will be slight.
なお、上述した実施例では、ヘリウムガスの圧力を５気
圧以下としたが、これは、絶縁試験を行う容器の耐圧の
点からこの圧力範囲が望ましい。In the above embodiment, the pressure of the helium gas was set to 5 atmospheres or less, but this pressure range is desirable from the viewpoint of the withstand pressure of the container in which the insulation test is performed.
しかし、ヘリウムガスの圧力がこれより高くなっても、
ヘリウムガスの放電特性はあまり変わらないので、この
圧力範囲に特に限定されるものではない。However, even if the pressure of helium gas becomes higher than this,
Since the discharge characteristics of helium gas do not change much, the pressure is not particularly limited to this range.
「発明の効果」
この発明は、以上説明したとおり、ヘリウムガス雰囲気
下で高電圧機器に高電圧を印加して絶縁特性を測定する
ので、高電圧機器の欠陥検出が空気中で行う場合に比べ
て低電圧で行うことができ、また、沿面閃絡を起こした
場合であってもエネルギーが小さいため、損傷が軽微と
なるという効果を奏する。"Effects of the Invention" As explained above, this invention applies high voltage to high-voltage equipment in a helium gas atmosphere and measures the insulation properties, so defects in high-voltage equipment can be detected more easily than in the air. This can be done at a low voltage, and even if creeping flash occurs, the energy is small, so damage is minimal.
第１図はこの発明を実施した回転機の固定子コイルを示
す概念図、第２図は空気およびヘリウムガスの放電電圧
特性を示す線図である。
図において、（２）はヘリウムガス、（３）は固定子コ
イル、（６）は導体、（７）は主絶縁層、（１０）は絶
縁特性測定回路、（１１）は高電圧電源である。
２ ゛ ヘソウＱブス
３ ： 固定）コイル
６：ＩＪ イ本
７ ： １更１啼層
１０ ： にう）≧９〒ト在１１り定ｃＤ訃１１
： 高電／Ｅ電源
昂２図FIG. 1 is a conceptual diagram showing a stator coil of a rotating machine embodying the present invention, and FIG. 2 is a diagram showing discharge voltage characteristics of air and helium gas. In the figure, (2) is helium gas, (3) is the stator coil, (6) is the conductor, (7) is the main insulation layer, (10) is the insulation characteristic measurement circuit, and (11) is the high voltage power supply. . 2 ゛ Hesou Q bus 3: fixed) Coil 6: IJ I book 7: 1 layer 1 layer 10: Niu) ≧9
: High voltage/E power source 2 diagram
Claims (2)
高電圧機器に高電圧を印加して絶縁特性を測定すること
を特徴とする高電圧機器の絶縁診断方法。(1) A method for diagnosing insulation of high-voltage equipment, which comprises placing the high-voltage equipment in a helium gas atmosphere, applying a high voltage to the high-voltage equipment, and measuring insulation characteristics.
徴とする特許請求の範囲第１項記載の高電圧機器の絶縁
診断方法。(2) The method for diagnosing insulation of high voltage equipment according to claim 1, wherein the pressure of the helium gas is 5 atmospheres or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5215587A JPS63218875A (en) | 1987-03-09 | 1987-03-09 | Diagnosing method of insulation for high-voltage apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5215587A JPS63218875A (en) | 1987-03-09 | 1987-03-09 | Diagnosing method of insulation for high-voltage apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63218875A true JPS63218875A (en) | 1988-09-12 |
Family
ID=12906963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5215587A Pending JPS63218875A (en) | 1987-03-09 | 1987-03-09 | Diagnosing method of insulation for high-voltage apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63218875A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1129854A1 (en) * | 2000-03-03 | 2001-09-05 | Domino Printing Sciences Plc | Flash-over detector |
-
1987
- 1987-03-09 JP JP5215587A patent/JPS63218875A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1129854A1 (en) * | 2000-03-03 | 2001-09-05 | Domino Printing Sciences Plc | Flash-over detector |
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