电力系统保护与控制Issue(17)：72-78,7.
LCL并网变流器反馈阻尼控制方法的研究
Study on feedback damping control methods of grid-connected inverter with LCL filter
摘要
Abstract
LCL filters have greatly improved the current quality of grid-connected inverters, however, the problems of resonance and stability are also brought in inevitably. In this paper, feedback control methods with two different side inductance currents are studied and discussed, respectively. Based on feedback control method with grid side inductance current, the paper proposes a no damping control method, in which optimal designing of the ratio relationship between sampling frequency and resonance frequency are used in the digital control system. For another, while the system adopts the feedback control method with inverter side inductance current, a filter damping control method is proposed, where the resonant component extracted by an improved high-pass filter is adopted. Both of the two methods can avoid using any additional sensor in the main circuit, not only the design procedure is simple, but the reliability is high, and it is convenient for the engineering applications. At last, experimental results show that the theoretical analysis is correct and the control methods are feasible.关键词
并网变流器/LCL滤波器/有源阻尼/电流反馈/高通滤波器/无传感器Key words
grid-connected inverter (GCI)/LCL filter/active damping/current feedback/high-pass filter/sensorless分类
信息技术与安全科学引用本文复制引用
韩刚,蔡旭..LCL并网变流器反馈阻尼控制方法的研究[J].电力系统保护与控制,2014,(17):72-78,7.基金项目
国家863计划项目（2011AA05A104）；国家电网科技项目（电网友好型大型风电场关键技术研究与示范）资助 This work is supported by National High-tech R & D Program of China (863 Program)(No.2011AA05A104) （863 Program）
