电晕紫外光脉冲与电晕电流脉冲相关性研究

Relationship Between the UV Corona Pulses and the Corona Current Pulses

为解决传统上多采用接触式检测电晕产生的电流脉冲研究电晕特征存在的最大缺陷是易受外界干扰严重的问题,采用光电倍增管精确测量短距离内紫外光的强度,研究了电晕电流脉冲和紫外光脉冲的相关性特征。结果表明,短距离内,电晕产生的紫外光强度与距离平方成反比,且与电晕电流脉冲信号相关性很强,其幅值特性及统计个数特性与电流脉冲信号对应较好,故紫外光信号可作为特征量代替电晕电流脉冲信号分析电晕特征。

The problem of contact detecting method is that the intensive environment disturbances make the results incorrect. The UV corona detecting method has been gradually used in the study of corona performance, and it can detect the corona without contacting, so it can resist environment disturbances very well. However, up to now, the question whether the UV light can exactly reflect the condition of corona has not resolved and the relativity between the corona and UV light has not been studied. In this paper, the relativity between the corona current pulses and the corona pulses of UV light is investigated. The corona UV light is received by photomultiplier tube（PMT） and the corona current is received by a sampling resistance. The experimental results show that： in short distance, the intensity of UV light is inverse proportioned to the square of the detecting distance and the intensity of UV light can be detected exactly in short detecting distance. Meanwhile, the result displays that, wherever corona exists on pin-plate of composite insulators, the number statistic of the UV corona pulses is correlated well with the current pulses, and the magnitude performance between the two pulses is correlated well too. So the UV detection method can be used well in the study of corona performance, and UV light can be taken as a new detecting element instead of the current pulses.