基于近似熵的次同步谐振检测方法  

A New Approximate Entropy-Based Method to Detect Sub-synchronous Resonance

作　　者：董青迅[1] 李兴源[1] 穆子龙[1] 顾威[1] 

机构地区：[1]四川大学电气信息学院,四川省成都市610065

出　　处：《电网技术》2011年第11期103-106,共4页Power System Technology

基　　金："十一五"国家科技支撑计划重大项目(2008BAA13B01);国家自然科学基金项目(51037003);四川省科技厅基础应用计划(2010jy0018)~~

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。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.

关 键 词：次同步谐振 近似熵 检测 扭矩 

分 类 号：TM72[电气工程—电力系统及自动化]