摘要
分析了带电机负载逆变器拓扑的数学模型,借鉴交流电机统一控制思想,以同步电机与异步电机为例,对交流电机进行了简化,得到了逆变器直流侧等效简化电路.并从电机的各种运行工况出发,分析了简化电路的合理性,分别探讨了逆变和整流部分的控制策略.其中,逆变器部分重点分析了直接影响电机控制性能的参数辨识;整流部分重点分析了几种提高整流器抗负载扰动的控制方法.最后搭建仿真平台验证了理论分析的合理性.
with providing hibidrectional power flow,near-unity-power-factor operation,low harmonic content content,excellent control perfomance of the motor,A 4-quadrant converter replaces the diode rectifier plus inverter topology,and which is more and more applied.Multi-level 4-quadrant converter is developed rapidly in the field of the high voltage power system.This paper fouses on the mathematical model of 4-quadrant converter with the motor load.The AC motor are changed to a equivalent simplified circuit,with the reference of the unified control theory of the AC motor.And the simplified circuit is justified,in all the different operating conditions of the motor.The control strategies of each part of the inverter and rectifier are discussed.Estimation parameters of the motor is studied in the inverter section,and several improved methods of control against load disturbance are charged in the rectifier section.Finally,simulation platform is built to verify the conlutions reasonable.
出处
《湖北工业大学学报》
2011年第1期37-43,共7页
Journal of Hubei University of Technology
关键词
四象限变流器
等效电路
参数辨识
抗负载扰动
4-quadrant converter
equivalent circuit
parameters estimation
anti-disturbance
