【摘要】 综述了国内外电力设备局部放电测量中抗干扰研究的现状。讨论了局部放电信号的特性以及常见干扰的类型、特点和传播途径 ;分频域开窗、时域开窗和时 -频分析 3类 ,详细介绍了现有的抗干扰措施 ,分析了它们的优缺点和适用范围 ;为了定量地评价干扰的抑制性能 ,以实现去噪的最优化 ,给出了几种表征抗干扰效果的特征量 ;最后展望了今后抗干扰研究的发展方向。更多还原

【Abstract】 It is an important step in partial discharge (PD) measurement of power equipment to extract PD pulses from disturbances effectively, so lots of methods for denoise are given. The present and future development of rejecting interference in PD measurement is reviewed in this paper. First, the characteristics of PD signals and the classification, traits and transmitting route of interference are discussed, which are the basis of denoise. Second, the ways of denoise are presented which are classified into window cutting from frequency domain, time domain,and time frequency analysis; and the relative merits and their applicability are discussed. Then, the characteristic parameters of denoising effect are listed for estimating the capability of noise suppressing quantitatively. Lastly, the prospect of restraining interference is provided.更多还原