RESEARCH ON THE FREQUENT AND PHASE CHARACTERISTICS OF LEAKAGE CURRENT OF ICED INSULATORS
The one of precondition to prediction flashover is effective leakage current characteristics of iced insulator, but there is no common agreement about the relation between the flashover and leakage current characteristics, which is one of reason for no perfect prediction flashover system. Based on the AC flashover model, the phase (0) between the first harmonic of leakage current and operated voltage is studied. It is found that, 9 decreases with development of arc. The relationship between the waveform distortion of leakage current and the total harmonic distortion (THD) is analyzed by fast Fourier transform (FFT). The THD increases slowly with the development of discharge when the icing water conductivity (IWC) is small. While the IWC is large, the THD increases firstly and then decreases. There come into being white arc discharge with the minimum of THD. Based on the theoretical analysis and experimental verification, it is proposed that THD and 9 can be used to predict the flashover.
Jiang Yanru Xia Yunfeng Jiang Xingliang Zhang Zhijing Hu Jianlin Shu Lichun
Loudi Electric Power Bureau of Hunan Electric Power Corporation, 417000, Loudi, China State Key Laboratory of Power Transmission Equipment and System Security and New Technology, College
国际会议
The 14th International Workshop on Atmospheric Icing of Structures(第十四届结构物大气覆冰国际研讨会 IWAIS 2011)
重庆
英文
111
2011-05-08（万方平台首次上网日期，不代表论文的发表时间）