基于脉冲点云图的局放仪线性度测评方法研究

Studying the method of pulse point cloud image to evaluation the PD instrument linearity

局部放电检测仪是确保电网安全运行的关键设备,需要定期对其进行测评,其中线性度测试是必须进行的实验项目之一。从局部放电信号的随机性出发,提出了基于统计法和φ-Q-n图的点云图概念,用于测评局放仪线性度。为更准确测试局放仪本体的线性度,采用直接脉冲电流注入局放仪本体的测量方式。根据本文的测试方法,针对MPD600局放仪本体的线性度测评,给出了详细的实验过程和线性度分析,并验证了此法的可行性。

Partial discharge（PD） instruments were the key to ensure the power equipments and system safety, it was need to regularly check and test. The evaluation of the PD＇s linearity test, which was one of experiments, must be carried out. This paper consid- ered the partial discharge signal was random, and proposed the concept of point cloud image, which was based on statistical method and φ-Q-n image, using it to evaluation of the PD＇s linearity. For more accurate testing PD instruments host linearity, with the direct pulsed current injection method to evaluation the PD instruments host. According to the test method in this paper, as a test case of MPD600＇s linearity, giving a detailed analysis of the linear and experimental process, to verify the feasibility of this method.