LCL并网滤波器的非线性阻尼控制  

Nonlinear Damping Controller for Grid-Connected LCL Filters

作　　者：杨仁增[1] 张光先[1] 

机构地区：[1]山东大学控制科学与工程学院,济南250061

出　　处：《电工技术学报》2015年第24期152-159,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51207083;61471372)

摘　　要：为提高LCL滤波并网变换器的控制性能,提出一种基于反馈线性化的LCL并网滤波电路级联非线性有源阻尼控制策略。该策略在三相LCL滤波并网变换器的仿射非线性模型基础上,采用级联的状态反馈线性化非线性控制方法,通过变换器网侧和桥臂侧有功电流、无功电流的全局线性化精确解耦控制,实现LCL滤波器的有源阻尼。所提非线性级联控制策略可消除LCL滤波电路的谐振尖峰,提升并网变换器的整机控制性能。仿真和实验验证了该控制策略的正确性和可行性。This paper presents a cascading nonlinear controller that applies to the grid-connected converter with LCL filters, based on linearization control. Herein, on the basis of an affine nonlinear model of three-phase grid-connected converter with LCL filter, the active and reactive currents of the converter at grid side and converter side are controlled with global linearization, through decoupling exaction from nonlinear feedback linearization controller. Consequently, the active damping of the filter is obtained. The cascading nonlinear controller removes the resonance of LCL filters and promotes the control performance of the converter effectively. Simulation and experimental results show the validation and feasibility of the proposed strategy.

关 键 词：LCL并网滤波器 有源阻尼 非线性控制 反馈线性化 

分 类 号：TN713[电子电信—电路与系统]