双电压环瞬时值反馈电压型逆变器研究

Research of Dual Transient Voltage Closed_Loop Feedback Inverter

为了无静差跟踪,传统的交流系统双闭环瞬时值控制的外环(电压环)多采用平均值反馈调节,这种方式对交流输出电压调节速度较慢、实时性不高,且存在相位和幅度误差。文中提出了一种新的双电压闭环瞬时值控制;电压外环采用PR交流调节器,电压内环在反馈通道上引入了高通滤波器;论文详细分析了PR调节器工作原理和基本参数设计,仿真和实验证明了系统具有良好的跟踪和调节特性,输出电压波形具有良好的正弦度。

To get no-steady-state error track control,most of the many reported control algorithms for dual closed_loop control of voltage loop adopt average feedback.It drawbacks： the transient response is slower,steady-state magnitude and phase error and limited disturbance rejection capability.This paper describes a new control method with dual closed_loop control.A proportional plus resonant（P＋resonant） regulator is added into the outer voltage regulation loop to achieve zero steady-state magnitude and phase error.A high_pass filter is adopted in the feedback channel for the inner voltage loop,the transient system response and output harmonic compensation is perfect in any particular situation.The work theory of the PR regulator and design of key parameter are gived indetail.Theory,simulation,and experimental results are presented in the paper.