变压器局部放电信号的干扰抑制

高压电力设备的运行故障时常发生,局部放电(PD)是造成这一现象的主要原因,因此适时地进行PD试验非常重要。然而,试验中提取的PD信号混有大量的噪声,严重影响了PD监测结果。借鉴偏微分方程在处理图像信号时可保留信号的边缘的特点处理一维PD信号。对局部放电信号去噪的仿真结果表明,扩散方程在PD信号的干扰抑制方面可取得较理想的效果。

Interference suppression of partial discharge signal from the transformer

Malfunction of high voltage power equipment occurs quite often, partial discharge (PD) is the main cause of this phenomenon. So it is very important to conduct the PD test in time. However, PD signal contains a large amount of noise during the experiments, which seriously affects the results of PD monitoring. In this paper, partial differential equation dealing with image signal with the advantages of reserving signal edge information was used to process one-dimensional PD signal. The simulation results of the partial discharge signal denoising showed that better results could be achieved by the diffusion equation in the interference suppression of PD signal.