摘要
以弱电网下LCL型并网逆变器系统稳定性为研究对象,利用数字控制器的优点,采用分时采样的有源阻尼控制策略,结合电容电压正反馈使得有效阻尼区扩大到整个奈奎斯特频率范围,提高了系统鲁棒性。该控制策略仅需要采样电容电压,节省传感器成本,另外无需额外的微分运算,实现简单。仿真和实验结果验证了该策略正确性。
This study focuses on the stability of LCL-type grid-connected inverter systems under weak grid conditions.By utilizing the advantages of digital controllers,a time-shared sampling active damping control strategy is proposed,which,in conjunction with positive feedback from the capacitor voltage,expands the effective damping region to the entire Nyquist frequency range,thereby improving system robustness.This control strategy requires only sampling the capaci⁃tor voltage,which saves sensor costs and does not necessitate additional differential calculations,making it simple to implement.Simulation and experimental results validate the effectiveness of this strategy.
作者
漆良波
池浦田
冯静波
Qi Liangbo;Chi Putian;Feng Jingbo(State Key Laboratory of Advanced Power Transmission Technology(State Grid Smart Grid Research Institute Co.,Ltd.),Beijing 102209,China)
出处
《电力电子技术》
2025年第6期1-6,共6页
Power Electronics
基金
国家电网有限公司科技项目(5500-202321512A-3-2-ZN)。
关键词
并网逆变器
数字控制器
分时采样
有源阻尼
grid-connected inverter
digital controller
time-shared sampling
active damping
