复合绝缘子电晕放电紫外图像参数的变化特性及放电量估计_王胜辉_律方成_刘云鹏.pdfVIP

33 34 Vol.33 No.34 Dec.5, 2013 2013 12 5 Proceedings of the CSEE ©2013 Chin.Soc.for Elec.Eng. 233 0258-8013 (2013) 34-0233-08 TM 855 A 470·40 (() 071003) Variation Characteristic of Composite Insulator Corona Discharge Ultraviolet Image Parameter and Estimation of Discharge Magnitude WANG Shenghui, LÜ Fangcheng, LIU Yunpeng (Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense (North China Electric Power University), Baoding 071003, Hebei Province, China) ABSTRACT: Ultraviolet (UV) imaging is a non-contact discharge detection method, a method for estimating the apparent discharge magnitude on composite insulator is proposed in this paper, which considers the two factors of observe distance and imager’s gain. According to the discharge UV image feature, the discharge facular regions in UV images 50%~80% were extracted with digital image processing algorithm, and 50%60%70%80% then the facular area parameter was defined. In laboratory, the relationship of facular area to apparent discharge magnitude, imager’s gain and observe distance were studied respectively. Research shows that facular area increases with the enhancement of discharge intensity, but it has non-linear characteristic, in the gain range of 50%-80%, facular area to gain has approximate exponential function relation, and when the gain i