Design of DC Partial Discharge Detecting System for Electrical Equipment

作     者：王鹏 吴广宁 曹开江 李明翔 

作者机构：School of Electrical EngineeringSouthwest Jiaotong University 

出 版 物：《Journal of Southwest Jiaotong University(English Edition)》 (西南交通大学学报（英文版）)

年 卷 期：2010年第18卷第4期

页      码：333-339页

摘      要：A balancing method was used to build a DC partial discharge （PD） testing circuit for electrical equipment,and a narrow-band detection system was designed using detection resistance and a filter. After signal accessed a high-speed digital acquisition （DAQ） card,the system was triggered to extract a single partial discharge （PD） signal. To eliminate the interference pulses caused by power supply ripple,etc.,the time domain and frequency domain features of pulses were extracted. Based on the features,cluster analysis was used to exclude interference pulses. Two-dimensional and three-dimensional histograms were obtained by use of the Δt method. Then,22 discharge statistical operators were calculated for the two-dimensional charts. Lastly,the defective capacitors were tested to verify the system＇s ability. The results show that the system is capable of PD detection in electrical equipment.

主 题 词：Insulation DC partial discharge Pattern recognition Data acquisition Statistical operator 

学科分类：0808[工学-自动化类] 080803[080803] 08[工学] 

D　O　I：10.3969/j.issn.1005-2429.2010.04.011

馆 藏 号：203108060...