非理想电网下改进二阶广义积分器锁相环研究  

Research on Improved Second Order Generalized Integrator Phase-locked Loop in Non-ideal Power Grid

作　　者：张建武 陈权[1,3] 李国丽[1,3] 胡存刚[1,4] ZHANG Jian-wu;CHEN Quan;LI Guo-li;HU Cun-gang(Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学电气工程与自动化学院,安徽合肥230601 [2]安徽大学工业节电与电能质量控制协同创新中心,安徽合肥230601 [3]教育部电能质量工程研究中心(安徽大学),安徽合肥230601 [4]安徽省工业节电与用电安全实验室(安徽大学),安徽合肥230601

出　　处：《电力电子技术》2021年第7期7-11,共5页Power Electronics

基　　金：安徽省自然科学基金(1808085ME113);国家自然科学基金(51777001)。

摘　　要：针对二阶广义积分器锁相环(SOGI-PLL)在含直流分量电网电压无法准确提取正序分量的缺点,在传统SOGI上添加一个求差节点,消除了直流分量的影响。但导致其无法滤除高次谐波,在其基础上又添加一个SOGI解决该不足。改进的SOGI-PLL能够实现在电网电压不平衡、含直流分量和高次谐波条件下准确提取正序分量并跟踪锁相角。仿真与实验验证了该方法的有效性和准确性。Because the second order generalized integrator phase-locked loop(SOGI-PLL)cannot accurately extract the positive sequence component in the grid voltage with DC component,a difference node is added to the traditional SOGI to eliminate the influence of DC bias,but it cannot filter out the high order harmonics,a SOGI is added to solve the problem.The improved SOGI-PLL can accurately extract the positive sequence component and track the phase-locked angle under the condition of unbalanced grid voltage,DC component and high order harmonics.Simulation and experiment verify the effectiveness and accuracy of the method.

关 键 词：二阶广义积分器 正序分量 锁相环 

分 类 号：TP321.2[自动化与计算机技术—计算机系统结构]