Practical PCA-DA system for measurement of leakage current pulses on polymer insulators under wet contaminated conditions

Kawa, D.F.; Chavez, M.J.; Orbeck, T.; Lumb, C.

doi:10.1109/57.127010

Cited by 15 publications

(4 citation statements)

References 5 publications

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“…이들의 현상은 이미 보고 되어져왔으며 [6,7,8,9] 그리고 세라믹애자의 경우 핀으로부터 아크가 시작되어 갭 을 향하여 진행되어 진다 [6,10,11,12]. 현수애자는 오손습윤 시 누설전류에 의해 전류밀도가 높은 핀 주변의 전계가 높 아지기 때문에 오손/습윤 복합으로 핀 주변으로부터 미소방 전이 발생 되어지며, 더욱더 습윤한 기체가 가세됨으로 대 전류의 아크방전이 발생 하게된다 [6,9,13]. 또한 여러 연구자 들이 애자의 섬락 발생과 이론적인 모델의 제시 그리고 누 설전류모니터링을 통한 예지방법도 보고되어져 왔다[2, 6, 7, [6,7,8,18,19,22,23].…”

Section: 서 론unclassified

Analysis of Leakage Current Waveforms for Transmission Line Porcelain Insulators due to ESDD Contamination

Park¹

2012

The Transactions of The Korean Institute of Electrical Engineer

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-This paper reports the contamination performance of transmission line porcelain insulators tested under five different contaminant conditions -clean and ESDD (equivalent salt deposit density) level (A, B, C, and D) through measurement of their leakage current under drop of potential method. To estimate the contamination for transmission line porcelain insulators, leakage current waveform and its maximum value were measured under step-up power test. In the clean insulators test, % distortion factors decreased with increasing step-up power, and as the ESDD level increased, some characteristics such as frequency analysis, harmonics and % distortion facotor could be used for contamination diagnosis of the transmission line porcelain insulators.

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Section: 서 론unclassified

Analysis of Leakage Current Waveforms for Transmission Line Porcelain Insulators due to ESDD Contamination

Park¹

2012

The Transactions of The Korean Institute of Electrical Engineer

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“…It is known [1][2][3][4] that, when pollution accumulates on the insulator's surfaces, it absorbs moisture and conducts significant leakage currents under service voltage. These currents produce non-uniform heating on the surface, thus producing dry bands which become bridged by one or more partial arcs.…”

Section: An Alternative Approach To Pollution Monitoringmentioning

confidence: 99%

“…Flash-over on high-voltage insulators caused by the combined action of atmospheric pollution and moisture has become a major problem in transmission and distribution power lines. When the pollution accumulates on the insulators' surfaces, it absorbs moisture and conducts significant leakage current under service voltage [1]. This current, with its non-uniform heating of the insulator surface, produces dry bands which become bridged by one or more partial arcs [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Design and construction of a pollution monitor for power line insulators

Ramírez-Niño¹,

Pacheco²,

Rodriguez³

et al. 1996

Meas. Sci. Technol.

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The basics of insulators' pollution processes are first reviewed, including the main physical and chemical factors involved. A novel fibre-optic-based device for measuring leakage and burst current is described, including the mechanical mounting, electronic modules and the corresponding hardware and calibration software of the equipment developed. A comparative analysis of the advantages and disadvantages of the design with similar equipment is presented. Finally, experimental results in a fog chamber are presented. Some statistical analyses, that can be useful in understanding the pollution process in electrical insulators, will be proposed.

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“…At present, the common technique to predict the flashover is by means of analysis of leakage current. It indicates the surges occurring near the current peaks of dry band arcing phenomena [5][6][7][8]. For a given insulator, evolution of leakage waveform depends essentially on the changes occurring at the surface pollution layer and surface wetness of the insulator.…”

Section: Introductionmentioning

confidence: 99%

Flashover Prediction of Polymeric Insulators Using PD Signal Time-Frequency Analysis and BPA Neural Network Technique

Narayanan¹,

Karthik²,

Chandrasekar³

2014

Journal of Electrical Engineering and Technology

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-Flashover of power transmission line insulators is a major threat to the reliable operation of power system. This paper deals with the flashover prediction of polymeric insulators used in power transmission line applications using the novel condition monitoring technique developed by PD signal time-frequency map and neural network technique. Laboratory experiments on polymeric insulators were carried out as per IEC 60507 under AC voltage, at different humidity and contamination levels using NaCl as a contaminant. Partial discharge signals were acquired using advanced ultra wide band detection system. Salient features from the Time-Frequency map and PRPD pattern at different pollution levels were extracted. The flashover prediction of polymeric insulators was automated using artificial neural network (ANN) with back propagation algorithm (BPA). From the results, it can be speculated that PD signal feature extraction along with back propagation classification is a well suited technique to predict flashover of polymeric insulators.

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Practical PCA-DA system for measurement of leakage current pulses on polymer insulators under wet contaminated conditions

Cited by 15 publications

References 5 publications

Analysis of Leakage Current Waveforms for Transmission Line Porcelain Insulators due to ESDD Contamination

Analysis of Leakage Current Waveforms for Transmission Line Porcelain Insulators due to ESDD Contamination

Design and construction of a pollution monitor for power line insulators

Flashover Prediction of Polymeric Insulators Using PD Signal Time-Frequency Analysis and BPA Neural Network Technique

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