高电压技术2018，Vol.44Issue(5)：1677-1684,8.DOI:10.13336/j.1003-6520.hve.20180430037
针-板模型交/直流电晕放电的紫外特征参量
Ultraviolet Characteristic Parameter of Needle-plate Model AC/DC Corona Discharge
摘要
Abstract
Ultraviolet(UV) imager is commonly adopted to detect corona discharge of electrical equipment, however, the relationship between the detected result and the fault type of discharge is hard to be determined in engineering. Therefore, we adopted a needle-plate model to analyze the corona discharge characteristics of needle-plate model under AC/DC voltages by an UV imager. Meanwhile, the photon number and facula area of discharge from an UV imager were extracted, and the characteristics of photon number and facula area of needle-plate model under different AC/DC voltages were analyzed. Results show that the photon number and facula area can reflect the intensity of corona discharge to a certain extent, the photon number and facula area decrease with the increase of observation distance, and the attenuation law satisfies the Allard's Law. UV characteristics show a trend of the growth of the power function with the increase of voltages under negative polarity DC and AC voltages. Under positive polarity DC voltages, because of the polar effect of needle electrode, corona initial voltage is higher, and a sharp growth appears in the UV characteristics because of neutralization ionization. Then, the leading role of ionization is changed, and UV characteristics quickly decay. Finally, the UV characteristics grow gently, and the trend meets the power function. Therefore, photon number and facula area can complement each other, and identify and characterize the intensity of corona discharge from multiple angles.关键词
电晕放电/针-板模型/紫外/UV/特征参量/光子数/光斑面积Key words
corona discharge/needle-plate model/ultraviolet/UV/characteristics parameter/photon number/facular area引用本文复制引用
黎振宇,蒋兴良,李立浧,胡琴,胡建林,张志劲..针-板模型交/直流电晕放电的紫外特征参量[J].高电压技术,2018,44(5):1677-1684,8.基金项目
国家创新研究群体基金(51321063).Project supported by Fund for Innovative Research Groups of China (51321063). （51321063）
