电工技术学报2017，Vol.32Issue(22)：42-49,8.DOI:10.19595/j.cnki.1000-6753.tces.160939
二阶广义积分器的三种改进结构及其锁相环应用对比分析
Three Improved Second Order Generalized Integrators and the Comparative Analysis in Phase Locked Loop Application
摘要
Abstract
Second order generalized integrator (SOGI) can extract the fundamental positive sequence component from three-phase grid voltage signals and obtain the accurate input signal phase by phase-locked loops (PLL). The traditional SOGI has a strong dependence on the input signal frequency, so three improved SOGIs are proposed in the paper. This paper mainly focuses on the detailed comparative analysis of the three improved SOGIs and applies them to PLL. The comparative experiments of three improved SOGI-PLLs are implemented under the conditions of grid voltage imbalance, containing DC components or containing higher harmonics. It can be proved that the improved Ⅲ-type SOGI-PLL has better adaptability to the grid. The correctness and feasibility of the theoretical analysis are verified by the experimental results.关键词
二阶广义积分器/锁相环/输入电压不平衡/谐波/直流分量Key words
Second order generalized integrator (SOGI)/phase-locked loops (PLL)/input voltage unbalance/harmonics/DC component分类
信息技术与安全科学引用本文复制引用
张纯江,赵晓君,郭忠南,于安博..二阶广义积分器的三种改进结构及其锁相环应用对比分析[J].电工技术学报,2017,32(22):42-49,8.基金项目
国家自然科学基金重点项目资助(51477148). （51477148）
