可抑制直流偏移的软启动式单相锁频环
SOFT-START SINGLE-PHASE FREQUENCY-LOCKED LOOP WITH DC COMPONENT REJECTION CAPABILITY
罗(韦) 1王琛琛1
作者信息
- 1. 上海理工大学电气工程系,上海 200093
- 折叠
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.
Abstract
Aiming at the problem that the traditional frequency-locked loop cannot reject the DC component of grid voltage,a frequency-locked loop structure based on DC component rejection loop is proposed.In order to improve the dynamic performance of the frequency-locked 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 frequency-locked 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Key words
PV power generation/frequency estimation/synchronization/DC component rejection/soft-startup引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据