增强型滑动平均滤波算法及其在畸变电网相位同步控制中的应用  

Enhanced Moving Average Filter and Its Applications in Phase Locking Control of Distorted Power Systems

作　　者：熊连松[1] 卓放[1] 刘小康[1] 

机构地区：[1]电力设备电气绝缘国家重点实验室(西安交通大学),西安710049

出　　处：《电工技术学报》2015年第21期13-23,共11页Transactions of China Electrotechnical Society

基　　金：国家高技术研究发展(863)计划(2012AA050206);国家重点基础研究发展(973)计划(2015CB251001)资助项目

摘　　要：针对滑动平均滤波法(MAF)滑动长度的优化设计问题,通过量化分析得到同时滤除若干指定次谐波时MAF滑动长度应满足的充要条件,并据此提出增强型MAF(EMAF)算法以及基于EMAF的畸变电网快速开环锁相方法。此外,从动态响应时间、数据存储量、暂态振荡幅度、谐波完全滤除能力以及高频随机噪声衰减能力等方面,将EMAF与串联延迟信号对消法(CDSC)进行对比分析。各种工况下的实验结果证明了研究结论的正确性以及改进方法的先进性。Focusing on the optimal window length design of the moving average filter （ MAF）, this paper deduces the necessary and sufficient conditions for MAF to filter specified orders of harmonics simultaneously with quantitative analysis. Then the enhanced MAF （EMAF） algorithm and the EMAF based open-loop phase locking scheme for the distorted grid synchronization are proposed. Compared with the cascaded delayed signal cancellation （CDSC） method, the technical economy of EMAF is also analyzed from five aspects, i. e. dynamic response time, transient oscillation amplitude, required data storage size, thorough harmonics elimination, and high-frequency stochastic noise suppression ability. The experiment validates the correctness of the conclusions and the superiority of the EMAF algorithm.

关 键 词：滑动平均滤波法 信号延时滤除法 相位同步控制 谐波滤除 畸变电网 

分 类 号：TM46[电气工程—电器]