Study of partial discharge detection and analysis system of high voltage storage capacitor based on client/server mode

According to the defects condition in the process of manufacture, defect models of capacitor are designed and capacitors that has manual defect are made. In this paper, Delta (t) method is presented, so AC partial discharge statistic and analysis method can be used in DC condition. Because there is no phase window in DC detection, redundant data in DC partial discharge digital detection can be generated. To solve this problem, a trigger data collection method is used in the process of DC partial discharge detection. Data acquisition card starts working only when partial discharge pulse appears, so only partial discharge pulse data are collected in the process of detection. There is little redundant data in the detection result and the load of digital detection system can be reduced. Through the use of SQL Server 2000 relational data base, the problem of high sample frequency but limit ability of data storage is resolved and the partial discharge data can be easily shared by the group in this analysis system. Partial discharge detection and analysis system is designed based on a C/S mode, and the system has the function including data collection, data upload, data download and data analysis. At last, the partial discharge of internal defect capacitor is detected, and its 2D statistic figure and 3D statistic figure are presented.