摘要
研究一种用于电力系统交流调压和稳压的二自由度控制器。控制器由单周期控制和传统PWM反馈控制组合而成,能有效抑制输入扰动和负载扰动对输出电压的影响,实现输出电压的快速自动稳定和无级平滑调节。本文分析了控制器的系统构成,从理论上证明其具有二自由度,采用双通道复位积分方式以减小控制误差,最后通过详细的仿真测试了控制器的性能。
A two-degree-of-freedom controller for AC voltage regulation and stabilization in power system is studied.This controller is a combination of one-cycle control and traditional PWM feedback control,which can effectively reject the influence of line perturbation and load disturbance on output voltage.Therefore,fast automatic stabilization and stepless smooth regulation of output voltage can be achieved. System organization of the controller is analyzed and the controller is theoretically proved to have two degrees-of-freedom.Dual-channel resetable integration is also employed to reduce control error.Finally,performance of the controller is tested by simulation in detail.
出处
《电源世界》
2011年第5期21-25,共5页
The World of Power Supply
关键词
交流调压
扰动抑制
自由度
电力电子
AC Voltage regulation
Disturbance rejection
Degree-of-freedom
Power electronics
