• Title, Summary, Keyword: Partial discharge

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A study about diagnosis of PD signal using by Fuzzy algorithm (퍼지 알고리즘을 이용한 부분방전 신호의 진단에 관한 연구)

  • Kim Jinsu;Park Jaewan;Park Keon-Jun;Oh Sung-Kwun;Kim Yong K.
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • pp.440-443
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    • 2005
  • In this paper, we introduce about a new class to analysis of partial discharge signal based on Fuzzy model. We can early diagnose life of power cable through detection of partial discharge signal. However, partial discharge signal detector is difficult because of partial discharge signal is very non-linear. Also, it is very difficult work that separate partial discharge signal from noise. We constructed partial discharge accumulation detection system that use Labview for detection of non-linear partial discharge signal. And analyzed partial discharge signal that is detected by Labview system utilizing Fuzzy model.

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A study about computer diagnosis that apply fuzzy algorithm and PRPDA accumulation detection of PD signal (부분방전 신호의 PRPDA누적 검출과 퍼지 알고리즘을 이용한 컴퓨터 진단에 관한 연구)

  • Kim, Jin-Su;Park, Keon-Jun;Oh, Sung-Kwun;Kim, Yong-K.
    • Proceedings of the IEEK Conference
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    • pp.1015-1018
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    • 2005
  • In this paper, we introduce about a new class to analysis of partial discharge signal based on Fuzzy model. We can early diagnose life of power cable through detection of partial discharge signal. However, partial discharge signal detector is difficult because of partial discharge signal is very non-linear. Also, it is very difficult work that separate partial discharge signal from noise. We constructed partial discharge accumulation detection system that use Labview for detection of non-linear partial discharge signal. And analyzed partial discharge signal that is detected by Labview system utilizing Fuzzy model.

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A Study on Partial Discharge Diagnosis Using AI Algorism (인공지능 알고리즘을 이용한 부분방전 진단에 관한 연구)

  • Kim, Jin-Su;Kim, Il-Kwon;Park, Keon-Woo;Kim, Kwang-Soon;Kim, Young-Il
    • Proceedings of the KIEE Conference
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    • pp.1382-1383
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    • 2008
  • In this paper, we have studied for analysis of the partial discharge(PD) signal based on fuzzy algorism. Partial discharge signal detector is difficult because of partial discharge signal is very non-linear. Also, it is very difficult work that separate partial discharge signal from noise. We constructed partial discharge accumulation detection system that use Labview for detection of non-linear partial discharge signal. And analyzed Partial discharge signal that is detected by Labview system utilizing Fuzzy model.

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A Study on Degradation Properties of Silicone Cable due to Partial Discharge (부분 방전에 의한 실리콘 케이블의 열화 특성에 관한 연구)

  • Lee, Sung Ill
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.28 no.1
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    • pp.34-39
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    • 2015
  • In this study, the characteristics of partial discharge was measured for the four core silicone cable (0.6/1.0 kV, $1.0SQ{\times}4C$) with insulated part of 15 cm and conductor of 1cm. The following results have been confirmed as a result of this study. When the first line of cable is connected to the positive electrode and the second, third line of cable is connected to the negative electrode, it found that the inception voltage and extinction voltage decreased with increasing the line of negative electrode, and the partial discharge charge quantity(Q) increases, while the number of discharge occurrence has decreased. The inception voltage and extinction voltage of partial discharge has decreased with increasing the degradation rate in the 33%, 67%, 100%. Also, it confirmed that the partial discharge charge quantity(Q) and the number of discharge occurrence has decreased.

Patterns of the Ultrasonic Signal caused by Partial Discharge in Transformer (변압기 부분방전에 의한 초음파 신호의 발생형태)

  • 권동진;최인혁;정길조;박찬영;나현석;박재준
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.581-584
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    • 2000
  • Generally, it is known that many partial discharges are occurred in one voltage cycle. In this case, it is not easy to distinguish between ultrasonic signals caused by the partial discharge. We describes a pattern of the ultrasonic signal by the partial discharge in transformer. The test setup for ultrasonic signal measurement was to simulate a internal partial discharge by using a needle to plane electrodes. We compared the number of partial discharge and ultrasonic signal in one voltage cycle. The results showed that it was possible to distinguish between ultrasonic signals by analysing partial discharge detection method and ultrasonic signal on time domain.

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Detection of the Ultrasonic Signals due to Partial Discharges in a 154kV Transformer

  • Kweon, Dong-Jin;Chin, Sang-Bum;Kwak, Hee-Ro
    • KIEE International Transactions on Electrophysics and Applications
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    • v.2C no.6
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    • pp.297-303
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    • 2002
  • We have developed an on-line ultrasonic detector to monitor partial discharge in an operating transformer. The ultrasonic sensor has 150[KHz] resonance frequency and contains a pre-amplifier with 60[㏈] gain. The on-line ultrasonic detector has 50~300[KHz] frequency band-pass filter to remove electrical and mechanical noises from the transformer. This detector has an ultrasonic signal discrimination algorithm which discriminates ultrasonic signals due to partial discharge in a transformer. A moving average method of ultrasonic signal number was employed to effectively monitor the increasing trend of the partial discharge. This paper describes an experience of partial discharge detection in a 154[㎸] operating transformer using an ultrasonic detector. With regards to gas analysis in oil, C2H2 gas was produced with a warning level in this transformer We detected ultrasonic signals on the transformer steel wall, and estimated the position of partial discharge. With further inspection, we found carbonized marks due to partial discharge on the supporting bolt which fastens the windings.

Analysis of Partial Discharge Patterns in the Pumped Storage Generator Stator Windings (양수발전기 고정자 권선에서 부분방전 패턴의 분석)

  • Kim, Hee-Dong;Ju, Young-Ho
    • Proceedings of the KIEE Conference
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    • pp.1015-1018
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    • 1999
  • Partial discharge patterns were analyzed in the pumped storage generator stator winding. These were measured using partial discharge analyzer(PDA) and digital partial discharge detector(PDD). Slot discharge was discovered in phase A. Discharges at conductor surface were occurred in phase B and in Phase C. Partial discharge patterns from on-line PDA system were compared with those off-line PDD system. The results of two systems are very same in phase A, B and C.

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Using the TDR in Dielectric for Partial Discharge Signals Detection Method (이종 비유전율에서 TDR을 이용한 PD발생 위치 추적방법)

  • Choi, Mun-Gyu;Cha, Hanju
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.9
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    • pp.1374-1379
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    • 2015
  • Time Domain Reflectometry(TDR) using microwave bands, including broadband spectrum that occurs at the range of rates that start between partial discharge position it easier to make the techniques that could be measured. Partial discharge in the Gas Insulated Switchgear(GIS), the dielectric constant in the band more than GHz different the insulating material if you want to organize, and the insulating material regardless of how partial discharge position in the SF6 gas Partial Discharge by applying the heritability estimated its position, but the position error occurred about 23 percent of the existing way, correct in not suitable location tracking the outbreak PD. This technique the rate of other dielectric that make up the power apparatus heterology is measured at the function to slow the progression of the electromagnetic waves apart by calculating the partial discharge as the location, A simple way to track. Dielectric using other methods proposed new structure can calculate the speed of heritability PD is occurring can measure.

A Study on the on Line Monitoring Techniques of the Partial Discharge for Transformer (변압기 부분방전 상시 감시기법에 관한 연구)

  • 권동진;박재준
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.14 no.12
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    • pp.1032-1040
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    • 2001
  • In order to apply the partial discharge measuring technique utilizing electrical pulse to the transformer at sites, this paper describes the measuring technique obtaining only the signals due to internal partial discharge in the transformer, but the noises due to external corona which has been a major problem so far. At first, partial discharge and corona noise were simultaneously generated in the model transformer by using needle-plane electrodes and rod-sphere electrodes out of it in a high voltage laboratory, respectively. It was verified that only the partial discharge signals in the transformer could be measured by removing the noise signals from the superposed signals of partial discharges and noises on the grounding wire of the model transformer. By application to a 345kV transformer in service, it was also confirmed that the partial discharge could be on-line monitored by removing the noise signals measured by the inductance sensor on the grounding wire of a 154kV lightning arrester from the superposed signals of internal partial discharge and external corona noise measured by bushing tap coupler of the transformer.

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An Analysis of Partial Discharge by the Optimum Method of Threshold Value (기준치(Threshold Value) 최적화 기법을 이용한 부분방전 해석)

  • Choi, I.H.;Yun, J.W.;Kweon, D.J.;Jung, G.J.
    • Proceedings of the KIEE Conference
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    • pp.2277-2279
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    • 1999
  • We have investigated the characteristic analysis of ultrasonic in case of occurring partial discharge in experimental steel chamber. This study presents the discriminative method of partial discharge by optimum threshold value. We have carried out the experiments of measuring partial discharge numbers between ultrasonic sensor and transducer with changing distance and barrier inside steel chamber. After the measured data were trasformed A/D conversion by GPIB, we used the optimum method of threshold value for counting numbers of partial discharge.

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