关键词: PWM整流器, 虚拟磁链, 二阶广义积分, 比例积分控制, 比例谐振控制

Abstract:

In the light of the PWM rectifier power grid voltage sensorless dc drift problems in virtual flux estimation,a new method of flux estimation is put forward,that behind the remaining points to join improving second-order generalized integral link,good solve the problem of the dc drift.At the same time,this article uses the voltage loop PI control,the current inner loop PR control.Simplify the tedious coordinate transformation and decoupling link.The experimental results show the feasibility of the scheme.

Key words: PWM rectifier, virtual flux, the second-order generalized integral, PI (proportional resonance) control, PR (proportional resonance) control