基于特定谐波消除的并网锁相环技术  

Grid-connected Phase Locked Loop Based on Selective Harmonic Elimination

作　　者：袁庆庆[1] 伍小杰[1] 石祥龙[1] 戴鹏[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏省徐州市221008

出　　处：《中国电机工程学报》2013年第36期34-40,7,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51077124);江苏省"青蓝工程"资助项目;江苏省2012年度普通高校研究生科研创新计划(CXZZ12_0930);徐州市科技计划项目(XJ11B008)~~

摘　　要：锁相环(phase-locked loop,PLL)技术的性能直接影响大规模并网系统的运行效果。为实现精确并网逆变控制,提出一种基于特定谐波消除(selective harmonic elimination,SHE)的锁相环技术。利用SHE能消除特定低次谐波的特性,将方波与SHE相结合,组成一种新颖的鉴相器;基于傅里叶分析,验证了该鉴相器的可行性。与常规PLL相比,该锁相技术大幅简化计算、便于数字化实现;且能保证在非理想电网环境下有效跟踪基波信号。Matlab仿真及DSP实验结果验证了该新颖锁相技术具有良好的动静态跟踪性能,且能同时适用于单相和三相并网系统。The performance of phase-locked loop （PLL） technology has a direct impact on the large-scale grid-connecting system. A new PLL method based on the selective harmonic elimination （SHE） theory was proposed to realize the precise grid-connecting inverter control. With the characteristics of eliminating selective harmonic components, the SHE theory combined with square wave has been adopted to form a novel phase detector, and whose feasibility was proved by the Fourier analysis. Compared to the classical PLL, this kind of PLL method could achieve a simplified calculation, an easy digital implementation and also make sure an effective fundamental signals tracking under non-ideal grid environment. MATLAB simulation and DSP experimental results verify the dynamic and steady tracking performance of this new kind of PLL, and which is both suitable for the single and three phases.

关 键 词：锁相环 特定谐波消除 鉴相器 傅里叶分析 非理想电网环境 

分 类 号：TM464[电气工程—电器]