三相逆变电源不平衡负载研究  

STUDY ON THE UNBALANCED LOAD OF A THREE-PHASE INVERTER

作　　者：白丹[1] 蔡志开[1] 彭力 康勇[1] 陈坚[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北省武汉市430074

出　　处：《电力系统自动化》2004年第9期53-57,共5页Automation of Electric Power Systems

摘　　要：负载情况对逆变器的设计和性能都有很大的影响。文中在对称分量法的基础上分析了不平衡负载的情况,并在电压型三相逆变电源数学模型的基础上推导了不平衡分量在dq坐标系下的表达式,提出了基波扰动瞬时值反馈控制器与谐波重复控制器结合的控制方案,分析了控制实现的可能性。仿真和实验结果都证明了该方案对不平衡负载有较强的抑制作用。The load conditions can influence the performance and design of inverter. The state space average models of a three-phase inverter in the ABC coordinate and dq rotating coordinate are presented. The unbalanced load is also modeled in the dq coordinate, in which it is clear what challenges the control design faces. Based on the characters of the unbalanced load in the dq coordinate, one control strategy is presented which is the fundamental component based instantaneous feedback controller paralleling with the harmonic component based repetitive controller. Both the simulation and experimental results verify this control strategy, which can restrain disturbance quickly and obtain high quality output waveform.

关 键 词：三相逆变器 不平衡负载 状态空间平均模型 瞬时值反馈控制 重复控制 

分 类 号：TM464[电气工程—电器]