摘要
针对电压型PWM整流器采用LCL滤波器易引起谐振,导致系统不稳定的问题,提出了一种新型多环控制策略并设计了其在同步坐标系的控制结构。该策略在PWM整流器传统的双闭环控制基础上引入了滤波器电容电流内环反馈控制,属于有源阻尼控制策略,通过等效增加系统的阻尼而有效抑制了LCL滤波器可能出现的谐振,从而保证系统的稳定性。在MATLAB/SIMULINK仿真环境下对所提出的控制策略进行了仿真,仿真结果验证了该策略的可行性和有效性。
In view of the defects of applying LCL filters in voltage source PWM rectifier( VSR),such as resonance and system instability,this paper presents a novel multi-loop control strategy and designs the control structure in synchronous coordinate system. The strategy belongs to active damping control,which introduces the filter capacitor current-loop feedback control on the basis of the traditional double-loop control system. The strategy increases the system equivalent damp which effectively inhibits the LCL filter resonance,thus ensures the system stability. The proposed strategy system has been simulated by using Matlab /Simulink,and the results verify its feasibility and effectiveness.
出处
《华东电力》
北大核心
2014年第6期1150-1153,共4页
East China Electric Power
基金
国家自然科学基金项目(51207086)~~
