可抑制直流偏移的软启动式单相锁频环  

SOFT-START SINGLE-PHASE FREQUENCY-LOCKED LOOPWITH DC COMPONENT REJECTION CAPABILITY

作　　者：罗韡 王琛琛 Luo Wei;Wang Chenchen(Department of Electrical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学电气工程系,上海200093

出　　处：《太阳能学报》2024年第1期552-562,共11页Acta Energiae Solaris Sinica

摘　　要：针对传统的锁频环无法抑制电网电压直流偏移问题,提出一种基于直流偏移抑制环路的锁频环结构;为提高锁频环在启动期间和相位跳变下的动态性能,对传统锁频环结构进行改进以降低锁频环的频率估计器环路增益,实现快速平滑的相角跳变跟踪;最终提出一种可抑制电网电压直流偏移的软启动式单相锁频环。仿真分析和实验结果表明,所提结构具有良好的稳态特性和动态特性。Aiming at the problem that the traditional frequency-locked loop cannot reject the DC component of grid voltage,a frequencylocked loop structure based on DC component rejection loop is proposed.In order to improve the dynamic performance of the frequencylocked loop during startup stage and phase angle jump condition,the traditional frequency-locked loop structure is improved to reduce the gain of the frequency estimator loop,achieving fast and smooth phase angle tracking.Finally,a soft-start up single-phase frequencylocked loop which can reject DC component of grid voltage is proposed.Simulation analysis and experimental results show that the proposed structure has good steady-state and dynamic characteristics.

关 键 词：光伏发电 频率估计 同步 抑制直流分量 软启动 

分 类 号：TM46[电气工程—电器]