电力系统故障暂态信号的功率谱估计

利用平稳随机过程的频谱估计方法，可以通过信号的功率谱识别信号的频域特征，简述了其基本思想和重要结论。采用频谱估计方法对电力系统故障暂态信号的频域特征进行了分析，从频域的不同侧面研究了电力系统高压输电线路故障信号的特点、性质，将为利用故障高频暂态噪声的新型保护研究提供有益的参考。仿真及功率谱估算结果表明，采用平稳随机过程功率谱估计方法进行输电线路故障暂态信号的功率谱估计是可行的。

Power spectral estimation of power system fault transient signal

Using frequency spectrum estimation of stationary stochastic process,the frequency domain character can be identified by power spectrum of signal.Some basic ideas and important conclusion are proposed.The spectrum estimation method is used to analyze the frequency domain character of fault transient signal in power system.From different sides of the frequency spectrum studies the fault signal characters and features of HV transmission line in power system.It can be usefully referred in new type protection study applying fault high frequency transient noise.The data from EMTP prove that this method is feasible.