低频振荡预警及分析功能在新疆电网WAMS系统中的应用及改进

对新疆电网广域测量系统高层应用中的低频振荡预警和分析功能进行了深入研究与改进.针对系统中原有的Prony算法分析长数据段时无法辨识出衰减快的分量而导致误差偏大的不足及视窗短的问题,引入时域峰值识别法,将两者有效的结合起来,进行长短视窗分析,有效提高了分析长数据段的准确性.同时建立了两段数据层分析方法及不同系统的数据转化分析方法,将同系统的数据分段、分层进行分析,将不同系统采集到的数据进行对比分析相互验证.通过实例验证了算法的可行性和有效性,对电网运行起到了实际作用,有利于新疆电网低频振荡分析和实时告警,保证了电网的安全稳定运行.

Application of Low Frequency Oscillation Early-warming and Analysis Function to WAMS System of Xinjiang Power Grid

The early-warming and analysis function module of low frequency oscillation based on WAMS are studied thoroughly.Because the signal components with high attenuating speed can hardly be identified,the analysis for long data segment using Prony algorithm causes a big error.And the length of visual window of Prony algorithm is also short.Considering the above mentioned shortcomings of Prony algorithm,a algorithm called time-domain peak valus is introduced which effectively improves the accuracy of analysis for...