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
雷世龙1
作者信息
- 1. 华中科技大学人工智能与自动化学院,湖北 武汉 430074
- 折叠
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.
Abstract
In the power system is gradually showing the trend of weak grid,the three-phase power of the grid will of-ten 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Key words
grid-connected inverter/phase-locked loop/complex coefficient filtering/system realization引用本文复制引用
出版年
2024
NETL
NSTL
万方数据