【摘要】 提出了一种可实时检测次同步谐振(sub-synchronous resonance,SSR)的方法。首先采样电流信号,计算其近似熵(approximate entropy,ApEn);然后在连续时间区段上,观察近似熵的变化规律判断是否发生次同步谐振,还分析了近似熵的实时性、很好的抗干扰能力以及同时处理随机信号和确定性信号的能力等;最后在IEEE第1标准测试系统模型上进行仿真。仿真结果证明了基于近似熵的次同步谐振检测方法的有效性。更多还原

【Abstract】 A new approximate entropy-based method,which can perform real-time detection of sub-synchronous resonance(SSR),is proposed.Firstly,the current signal is sampled and its approximate entropy is calculated;then whether SSR occurs or not is judged by observing variation law of approximate entropy in continuous time intervals,in addition,the real-time performance of approximate entropy,its good anti-interference ability and its ability of processing random signals and deterministic signals are analyzed;finally,the proposed method is simulated by IEEE first benchmark system model.Simulation results show that the approximate entropy-based SSR detection method is effective.更多还原