动态近似熵在强迫功率振荡在线检测中的应用  

Application of Dynamic Approximate Entropy in Real-time Detection of Forced Power Oscillation

作　　者：杨小明[1] 刘涤尘[1] 廖清芬[1] 单增礼[1] 罗恒[1] 张红丽[1] 

机构地区：[1]武汉大学电气工程学院,湖北省武汉市430072

出　　处：《电网技术》2012年第11期129-133,共5页Power System Technology

基　　金：国家高技术研究发展计划(863项目)(2011AA05A119);国家自然科学基金项目(51077103);国家电网公司大电网重大专项资助项目课题(SGCC-MPLG029-2012)~~

摘　　要：提出了一种快速可实时检测强迫功率振荡的方法。首先通过获取联络线上的功率振荡信号,在连续的区间段内计算实时的近似熵值,观察连续区间内近似熵的动态变化规律来判断是否发生强迫功率振荡,同时分析了近似熵的实时性和抗干扰性。在4机2区系统模型上进行了仿真。仿真结果验证了动态近似熵在强迫功率振荡在线检测及振荡过程趋势预测方面的有效性,为紧急控制措施的制定提供了参考。A new method that can detect forced power oscillation in real-time mode is proposed.Firstly,by means of acquiring the signal of power oscillation occurred in tie line the real-time approximate entropy value in continuous time intervals is calculated,and what whether the forced power oscillation occurs is judged by observing dynamic variation of approximate entropy value in continuous time intervals,in addition the real-time performance and anti-interference performance of approximate entropy are analyzed.The availability of approximate entropy in online detection of forced power oscillation and trend forecast of oscillation process is verified by results of simulation of a four-machine two-region system,and simulation results are available for reference to the drafting of emergency control measures.

关 键 词：强迫功率振荡 动态近似熵 实时 检测 

分 类 号：TM72[电气工程—电力系统及自动化]