电力系统保护与控制Issue(2)：108-112,5.
基于光伏并网逆变系统的改进锁相环设计
Improved PLL design of PV grid inverter system
摘要
Abstract
The paper presents a PLL based on double second-order generalized integral (DSOGI-PLL) of abstracting grid voltage phase quickly and accurately for low accuracy and slow dynamic response of traditional PLL in the case of the unbalanced grid voltage in grid-connected PV systems. It can effectively extract the grid voltage positive sequence component, by using generalized integral and standard three-phase locked loop. Finally, the paper builds simulation for two-phase grid voltage drop and three-phase grid voltage unbalanced drop, and then uses DSP to verify it. Simulation results show that the PLL can provide more precise control reference for the grid-connected inverter, by which the stability and effectiveness of grid power generation systems are improved.关键词
光伏/并网/不平衡/锁相环/正序/负序Key words
photovoltaic/grid-connected/unbalanced/PLL/positive/negative分类
信息技术与安全科学引用本文复制引用
赵贵龙,曹玲玲,祝龙记..基于光伏并网逆变系统的改进锁相环设计[J].电力系统保护与控制,2015,(2):108-112,5.基金项目
安徽省教育厅重点科研项目(KJ2013A084) （KJ2013A084）
