中国电机工程学报2011，Vol.31Issue(36)：8-15,8.
基于离散状态空间模型的LCL滤波并网变换器控制策略
Control Strategy of Grid-connected Converter With LCL Filter Based on Discrete State-space Model
摘要
Abstract
The LCL filter is effective in the reduction of switching frequency harmonics, however the third-order LCL filter is undamped system and instability. In order to overcome this problem, the use of a damping resistor and active damping were often used, but the damping resistor will result in the power consumption and the method of active damping needs more sensors compared to the standard control. The discrete state space model was built for the LCL filter and its characteristics was analyzed. Based on the proposed model, multi-variable full state feedback was introduced to guarantee the stability of inner loop by increasing the system damping, then suppressed the resonant of the LCL filter system. A novel method of the pole assignment based on virtual resistor was proposed to aming the state feedback matrix. The stability and response of the system was analyzed in z plane. Finally, experimental results verify the availability and correctness of the proposed control strategy.关键词
LCL滤波器/并网变换器/状态反馈/极点配置/虚拟电阻Key words
LCL filter/grid-connected converter/statefeedback/pole assignment/virtual resistor分类
信息技术与安全科学引用本文复制引用
侯朝勇,胡学浩,惠东..基于离散状态空间模型的LCL滤波并网变换器控制策略[J].中国电机工程学报,2011,31(36):8-15,8.基金项目
国家电网公司科技项目（DG71-10-007). （）
