三种GIS局部放电检测方法的比较分析研究

为了比较分析局部放电检测中脉冲电流法、超高频法和紫外成像技术的灵敏度和参量之间的关系,建立了一套模拟GIS局部放电检测平台。利用脉冲电流法、超高频法和紫外成像技术对模拟的GIS腔体的几种典型模型下的局部放电活动进行了测量,获得了大量实验数据和图谱。研究表明,脉冲电流法具有较高的灵敏度,超高频法灵敏度适中,而紫外成像技术灵敏度最差。同时在反映局部放电活动强弱上,三种检测方法的参量之间具有相同的变化趋势,但是不存在直接的线性关系。为了能够准确地确定局部放电的严重程度应该综合应用多种检测方法。

Study on the Three Kinds of GIS Partial Discharge Detection

In order to explore the sensitivity and the parameters of relationship among the electrical research association(ERA), the ultra high frequency(UHF) and the UV imaging technology in partial discharge detection, using the simulation GIS to establish a set of partial discharge detection platform. Application of the ERA, the UHF and UV imaging technology to carry out the measurement of partial discharge activity under several typical model of simulation GIS cavity, access to a large number of experimental data and maps. The studies show that the sensitivity of the ERA is the highest among them, the sensitivity of the UHF is higher than UV imaging technology. And the three kings have same trend reflecting the change of PD level, but there is not direct linear relationship among them. In order to accurately determine the severity of PD , we should use a variety of detection method.