中国电机工程学报2013，Vol.33Issue(9)：10-16,前插2,8.
带LCL滤波器的并网逆变器单电流反馈控制策略
Single Current Feedback Control Strategy for Grid-connected Inverters With LCL Filters
摘要
Abstract
The LCL filter is widely applied in grid-connected inverter systems,due to its good attenuation to high order harmonics.However,the LCL filter is a low-damping three-order system,and is easy to resonate.The traditional active damping method,through sampling and feedbacking the capacitor current,can suppress the system oscillation,but the number of the sensors is increased.This paper proposes a single current feedback control strategy,which uses the feedback method of second derivative of the grid current,and can increase the system damping,then the resonant peak of the LCL filter is effectively eliminated,and the system stability is guaranteed; meanwhile,it's not sensitive to the system parameters,and no extra sensors are added,so this is a low cost,high reliability control strategy.In this paper,the system transfer function with this control strategy is derived,and the system stability is analyzed.Finally,the simulations and experiments demonstrate the feasibility and effectiveness of the proposed control strategy.关键词
LCL滤波器/并网逆变器/谐振阻尼/系统稳定性Key words
LCL filter/ grid-connected inverter/ resonance damping/ system stability分类
信息技术与安全科学引用本文复制引用
陈东,张军明,钱照明..带LCL滤波器的并网逆变器单电流反馈控制策略[J].中国电机工程学报,2013,33(9):10-16,前插2,8.基金项目
国家自然科学基金项目(50907061) （50907061）
Project Supported by National Natural Science Foundation of China (50907061). （50907061）
