JP2865533B2 - Ground fault fault identification method by insulator fouling - Google Patents
Ground fault fault identification method by insulator foulingInfo
- Publication number
- JP2865533B2 JP2865533B2 JP23553393A JP23553393A JP2865533B2 JP 2865533 B2 JP2865533 B2 JP 2865533B2 JP 23553393 A JP23553393 A JP 23553393A JP 23553393 A JP23553393 A JP 23553393A JP 2865533 B2 JP2865533 B2 JP 2865533B2
- Authority
- JP
- Japan
- Prior art keywords
- ground fault
- voltage
- insulator
- phase voltage
- zero
- 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.)
- Expired - Lifetime
Links
- 239000012212 insulator Substances 0.000 title claims description 26
- 238000000034 method Methods 0.000 title claims description 7
- 238000011109 contamination Methods 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 5
- 229910001219 R-phase Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000018199 S phase Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Landscapes
- Testing Relating To Insulation (AREA)
- Insulators (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高圧配電線の汚損碍子
による地絡故障を他の地絡故障と容易に識別する碍子汚
損による地絡故障識別方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for distinguishing a ground fault caused by a fouled insulator of a high-voltage distribution line from another ground fault.
【０００２】[0002]
【従来の技術】いままで、碍子の洩れ電流を検出する装
置は碍子の汚損管理、又は、劣化判定を測定するため
に、それぞれの装置を個々に設置するか、現地まで装置
を運搬していた。2. Description of the Related Art Until now, devices for detecting the leakage current of insulators have been installed individually or transported to the site in order to control the contamination of the insulator or to determine the deterioration. .
【０００３】しかし、実際に測定を行う場合には、大き
な労力を必要とするという欠点があった。[0003] However, there is a disadvantage that a large amount of labor is required when actually performing the measurement.
【０００４】具体的には、高圧配電線の停電を伴い、そ
れぞれの装置により個別に碍子を測定するため昇柱作業
を繰り返すことを必要とした。[0004] More specifically, a power outage of a high-voltage distribution line has occurred, and it has been necessary to repeat the ascending work to measure insulators individually by each device.
【０００５】この改善策として、高調波雑音を利用した
方法がある。しかしこの方法は、外来雑音電波と対象物
からのノイズの区分の判定、設備毎に測定を行なわなく
てはならない等の煩わしさが伴う。As a remedy, there is a method utilizing harmonic noise. However, this method involves inconveniences, such as determination of the classification of external noise radio waves and noise from an object, and measurement for each facility.
【０００６】[0006]
【発明が解決しようとする課題】このように従来の方法
では、汚損碍子の発見を上述したような設備毎の測定に
よって実施しなければならず、碍子の汚損による地絡故
障の発生を変電所等における集中監視によって実行する
ことができなかった。ところで、高圧配電線路において
は、地絡故障が起きると比較的大きな零相電圧が発生す
ることがわかっている。この零相電圧の変化は変電所等
における集中監視によって検出することが可能である。
しかし、地絡故障の原因には汚損碍子による地絡の他
に、金属地絡、ケーブル地絡があり、零相電圧の変化を
監視することのみでは、汚損碍子による地絡を識別する
ことができないという問題があった。本発明は、変電所
等からの集中監視によって碍子の汚損による地絡故障と
他の地絡故障を識別することを可能とする碍子汚損によ
る地絡故障識別方法を提供することを目的とする。As described above, in the conventional method, the discovery of the contaminated insulator must be performed by the above-described measurement for each facility, and the occurrence of the ground fault due to the contaminated insulator is considered in the substation. Etc. could not be performed by centralized monitoring. By the way, it is known that a relatively large zero-phase voltage is generated when a ground fault occurs in a high-voltage distribution line. This change in the zero-sequence voltage can be detected by centralized monitoring at a substation or the like.
However, ground faults include ground faults caused by fouling insulators, metal ground faults, and cable ground faults.Monitoring the zero-sequence voltage change alone can identify ground faults caused by fouling insulators. There was a problem that it was not possible. SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for identifying a ground fault due to insulator contamination, which makes it possible to distinguish a ground fault due to insulator contamination from another ground fault by centralized monitoring from a substation or the like.
【課題を解決するための手段】上記課題を解決するた
め、本発明は高圧配電線路の電圧・電流を監視し、前記
高圧配電線路の零相電圧が所定のしきい値を越えた場合
に地絡故障が発生したと判断し、 ひずみ率（％）＝Σ（ｎ次高調波の実効値／基本波の実効値）×１００ と定義したとき、該零相電圧のひずみ率が１７．３〜４
１．２％であり、かつ地絡相電圧のひずみ率が２．７〜
５．０％の場合に、碍子汚損による地絡故障と 識別する
ことを特徴とする碍子汚損による地絡故障識別方法であ
る。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention monitors the voltage and current of a high-voltage distribution line, and when the zero-phase voltage of the high-voltage distribution line exceeds a predetermined threshold value, the present invention is applied. When it is determined that a short circuit fault has occurred and the distortion factor (%) = Σ (effective value of the nth harmonic / effective value of the fundamental wave) × 100 , the distortion factor of the zero-phase voltage is 17.3 to 4
1.2%, and the distortion rate of the ground fault phase voltage is 2.7 to
In the case of 5.0%, this is a method for identifying a ground fault due to insulator contamination, which is distinguished from a ground fault due to insulator contamination.
【０００７】[0007]
【作用】汚損碍子による漏れ電流に伴い、変電所におい
て零相電圧が観測される。その零相電圧と地絡相電圧の
波形測定と解析により汚損碍子による地絡故障を判定す
る。According to the present invention, a zero-sequence voltage is observed at a substation due to a leakage current caused by a fouling insulator. By measuring and analyzing the waveforms of the zero-phase voltage and the ground-fault phase voltage, a ground fault due to the fouling insulator is determined.
【０００８】[0008]
【実施例】図１は、本発明の１実施例の構成図である。
１０は高圧配電線路であり、電源スイッチ１１が投入さ
れると変電所の高圧電源１２より電源が供給される。配
電線路１０の電源スイッチ１１側の始端および終端のそ
れぞれには変成器１３、１４が設置される。変成器１
３、１４を介して故障点標定装置１５、１６に電圧、電
流波形が供給される。１７は人工的に汚損させて碍子で
ある。FIG. 1 is a block diagram of one embodiment of the present invention.
Reference numeral 10 denotes a high-voltage distribution line, and when a power switch 11 is turned on, power is supplied from a high-voltage power supply 12 of a substation. Transformers 13 and 14 are installed at the start and end of the power distribution line 10 on the power switch 11 side, respectively. Transformer 1
Voltage and current waveforms are supplied to fault point locating devices 15 and 16 via 3 and 14. Reference numeral 17 denotes an insulator which is artificially contaminated.
【０００９】一般に高圧配電線路において地絡故障が起
きると零相電圧が発生することがわかっている。汚損碍
子により漏れ電流が流れると地絡故障となり、零相電圧
が発生する。この零相電圧は前記した地絡故障の原因に
よりその大きさ、波形の歪みが変化する。It is generally known that a zero-phase voltage is generated when a ground fault occurs in a high-voltage distribution line. When a leakage current flows through the fouling insulator, a ground fault occurs and a zero-phase voltage is generated. The magnitude and waveform distortion of this zero-sequence voltage change due to the ground fault.
【００１０】図２は、図１の構成による各相の測定波形
である。配電線路１０の終端に人工的に汚損をさせた碍
子１７の洩れ電流による地絡故障時のＲ相電圧波形２１
と、Ｓ相電圧波形２２と、Ｔ相電圧波形２３であり、零
相電圧波形は２４である。地絡故障相はＲである。FIG. 2 shows measured waveforms of each phase according to the configuration of FIG. R-phase voltage waveform 21 at the time of ground fault due to leakage current of insulator 17 which artificially contaminates the end of distribution line 10
, The S-phase voltage waveform 22 and the T-phase voltage waveform 23, and the zero-phase voltage waveform is 24. The ground fault phase is R.
【００１１】碍子の洩れ電流が流れると零相電圧２４が
発生し、その大きさは３周期程度で減衰している。When a leakage current of the insulator flows, a zero-sequence voltage 24 is generated, and its magnitude is attenuated in about three cycles.
【００１２】故障点標定装置１５、１６は発生した零相
電圧が設定された閾値以上ならば波形の解析を行う。波
形解析部分は図２のＲ相電圧２１の４周期目の１周期で
あり、他の波形も同時刻の１周期について行う。If the generated zero-sequence voltage is equal to or larger than the set threshold value, the fault point locating devices 15 and 16 analyze the waveform. The waveform analysis part is one cycle of the fourth cycle of the R-phase voltage 21 in FIG. 2, and the other waveforms are also performed for one cycle at the same time.
【００１３】この１周期の波形をフーリエ級数に展開し
各高調波の実効値を求め、本発明で数１に定義した歪み
率の演算を行う。The one-period waveform is expanded into a Fourier series, the effective value of each harmonic is obtained, and the distortion rate defined by the formula 1 in the present invention is calculated.
【００１４】[0014]
【数１】 (Equation 1)
【００１５】数１における歪み率を図１による構成で汚
損碍子１７と置き換えて実施した代表的な地絡故障ごと
に演算した結果を表１に示す。Table 1 shows the result of calculation for each representative ground fault which was implemented by replacing the distortion rate in Equation 1 with the pollution insulator 17 in the configuration shown in FIG.
【００１６】[0016]
【表１】 [Table 1]
【００１７】表１により零相電圧の歪み率から金属地絡
との識別が可能であり、地絡相電圧の歪み率よりケーブ
ル地絡との識別が可能となる。According to Table 1, it is possible to discriminate the ground fault from the metal ground from the distortion rate of the zero-phase voltage, and it is possible to discriminate the ground fault from the cable from the distortion rate of the ground fault phase voltage.
【００１８】[0018]
【発明の効果】以上説明したように変電所における電
圧、電流波形を測定し、その高調波解析を行うことによ
り碍子の洩れによる地絡故障と判定できる。従って、変
電所等による集中監視により碍子の汚損状況の判断が可
能となり、大幅な労力の削減が可能となる。As described above, by measuring the voltage and current waveforms at the substation and performing harmonic analysis thereof, it is possible to determine that a ground fault has occurred due to leakage of the insulator. Accordingly, it is possible to judge the status of the insulator contamination by centralized monitoring by a substation or the like, and it is possible to greatly reduce labor.
【図１】本発明の実施例を示した説明図である。FIG. 1 is an explanatory diagram showing an embodiment of the present invention.
【図２】本発明の演算を行った汚損碍子の洩れ電流発生
時の各相電圧、零相電圧波形図である。FIG. 2 is a waveform diagram of each phase voltage and a zero-phase voltage at the time of occurrence of leakage current of a fouling insulator on which the calculation of the present invention is performed.
１０ 高圧配電線路 １１ 電源スイッチ １２ 高圧電源 １３、１４ 変成器 １５、１６ 故障点標定装置 １７ 汚損碍子 ２１ Ｒ相電圧波形（地絡相） ２２ Ｓ相電圧波形 ２３ Ｔ相電圧波形 ２４ 零相電圧波形 DESCRIPTION OF SYMBOLS 10 High-voltage distribution line 11 Power switch 12 High-voltage power supply 13, 14 Transformer 15, 16 Failure point locating device 17 Soil insulator 21 R-phase voltage waveform (ground fault phase) 22 S-phase voltage waveform 23 T-phase voltage waveform 24 Zero-phase voltage waveform
Claims (1)
場合に地絡故障が発生したと判断し、 ひずみ率（％）＝Σ（ｎ次高調波の実効値／基本波の実効値）×１００ と定義したとき、 該零相電圧のひずみ率が１７．３〜４１．２％であり、
かつ地絡相電圧のひずみ率が２．７〜５．０％の場合
に、碍子汚損による地絡故障と 識別することを特徴とす
る碍子汚損による地絡故障識別方法。1. A voltage / current of a high-voltage distribution line is monitored, and when a zero-phase voltage of the high-voltage distribution line exceeds a predetermined threshold value, it is determined that a ground fault has occurred, and a distortion factor (%) is determined. = Σ (Effective value of nth harmonic / Effective value of fundamental wave) × 100 , the distortion rate of the zero-phase voltage is 17.3 to 41.2%,
And when the distortion rate of the ground fault phase voltage is 2.7 to 5.0%
, The ground fault identification method according insulator fouling, characterized in that identifying the ground fault due to insulator fouling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23553393A JP2865533B2 (en) | 1993-08-27 | 1993-08-27 | Ground fault fault identification method by insulator fouling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23553393A JP2865533B2 (en) | 1993-08-27 | 1993-08-27 | Ground fault fault identification method by insulator fouling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0765658A JPH0765658A (en) | 1995-03-10 |
| JP2865533B2 true JP2865533B2 (en) | 1999-03-08 |
Family
ID=16987390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23553393A Expired - Lifetime JP2865533B2 (en) | 1993-08-27 | 1993-08-27 | Ground fault fault identification method by insulator fouling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2865533B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109375060B (en) * | 2018-11-12 | 2020-11-13 | 上海金智晟东电力科技有限公司 | Method for calculating fault waveform similarity of power distribution network |
| CN119377635B (en) * | 2024-10-09 | 2026-01-20 | 广东电网有限责任公司 | Power distribution network communication fault type identification method and device, electronic equipment and storage medium |
-
1993
- 1993-08-27 JP JP23553393A patent/JP2865533B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0765658A (en) | 1995-03-10 |
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