基于QPR控制的三相电压锁相环技术研究  

Research on Three-Phase Voltage Phase-Locked Loop Technology Based on QPR Control

作　　者：张青 ZHANG Qing(Fujian Nebula Electronics Co.Ltd.,Fuzhou 350001,China)

机构地区：[1]福建星云电子股份有限公司,福建福州350001

出　　处：《电气开关》2024年第6期59-65,共7页Electric Switchgear

摘　　要：针对传统的双广义积分器锁相环(DSOGI-PLL)在电网电压状态发生改变时,无法实现快速锁相和锁频的问题,在DSOGI-PLL的基础之上,提出了一种基于准比例谐振(QPR)控制器的三相电压锁相环方法。即在电网电压进入锁相环节之前,先采用QPR方法对电网电压进行处理,滤除其中存在的谐波分量。通过电压幅值变化、相位变化和频率变化三个工况仿真结果发现,相较于传统的DSOGI-PLL方法,所提的方法具有快速锁相和锁频的优势。Aiming at the problem that the traditional dual generalized integrator phase-locked loop(DSOGI-PLL)cannot achieve fast phase locking and frequency locking when the grid voltage state changes,a three-phase voltage phase-locked loop method based on quasi-proportional resonance(QPR)controller is proposed in this paper.That is,before the grid voltage enters the PLL section,the QPR method is used to process the grid voltage and filter out the harmonic components.The simulation results of voltage amplitude change,phase change and frequency change show that the proposed method has the advantages of fast phase locking and frequency locking compared with the traditional DSOGI-PLL method.

关 键 词：三相电压 DSOGI-PLL QPR 

分 类 号：TM921[电气工程—电力电子与电力传动]