三相不平衡电压的复系数滤波锁相环方法  

Complex Coefficient Filtered Phase-locked Loop Method for Three-phase Unbalanced Voltage

作　　者：雷世龙 

机构地区：[1]华中科技大学人工智能与自动化学院,湖北武汉430074

出　　处：《工业控制计算机》2024年第8期143-145,共3页Industrial Control Computer

摘　　要：在电力系统正逐渐呈现出弱电网的趋势下,电网的三相电会经常出现三相不平衡和含有电力谐波的工况,这些恶劣工况会对各种并网逆变器的锁相环结构的快速性、精确性、稳定性提出更高要求,传统的SRF-PLL已经无法满足需求。基于复系数滤波的思想,对传统锁相环进行改进,给出了一种复系数滤波的锁相环系统设计方法。通过Simulink仿真实验验证了所提出的设计方法的正确性。In the power system is gradually showing the trend of weak grid,the three-phase power of the grid will often appear three-phase imbalance and contain power harmonics conditions,these harsh conditions will be a variety of grid-connected inverter phase-locked loop structure of the rapidity,accuracy and stability of the higher requirements,the traditional SRF-PLL has been unable to meet the demand.This paper improves the traditional phase-locked loop based on the idea of complex coefficient filtering,and proposes a phase-locked loop system design method with complex coefficient filtering.The correctness of the proposed design method is verified by Simulink simulation experiments.

关 键 词：并网逆变器 锁相环 复系数滤波 系统实现 

分 类 号：TM761.1[电气工程—电力系统及自动化]