CHEN Pu1, REN Yong1, CHEN Ke2, JIANG Daozhuo2, CHEN Feng2, BI Renming3

 

(1. Guiyang Power Supply Bureau, Guiyang 550001,China;

 

2. College of Electrical Engineering Zhejiang University, Hangzhou 310027, China;

 

3. Zhejiang GuirongXieping Technology Co., Ltd. Hangzhou 310030, China)

 

 

Abstract: Aiming at the problem of internal fault of DFSC capacitor, the basic principle of distributionfixed series capacitor(DFSC) improving the voltage profile of radial distribution line was simply analyzed, as well the structurechart of it was introduced and the mathematical models of DFSC internal structure and system wiring were established. Therefore a diagnostic criterion of capacitor internal fault was given when internal fault occurs, as well an improved method was put forward to deal with the system harmonic. Finally, the criterion was verified by Matlab/Simulink and experiment. The research results indicate that the criterion proposed performed effectively in internal fault diagnosis with the system harmonic, and is better than conventional method.

 

Key words: distributionfixed series capacitor (DFSC); system harmonic; mathematical modeling; new criterion