单相PWM整流器DQ变换控制的模拟电路设计

Analog-circuit implemented DQ transform controller in single-phase PWM rectifier

PWM整流器控制中常通过引入坐标变换实现系统有功无功解耦,以简化控制器设计。为此,提出了一种基于全通滤波器方式的坐标变换模拟电路设计方案,应用所提坐标变换方案并结合单相PWM整流器给出了虚拟DQ变换的双环控制结构,同时基于系统模型分析分别给出了电压环和电流环补偿器的参数设计结果,进一步构建出系统的具体模拟控制电路,最后通过实验验证了所提坐标变换电路与补偿器参数设计的有效性。

Coordinate transformation is usually introduced to realize de-coupled control of active and reactive power and simplify the controller design for controlled PWM rectifier.For this reason,an analog all-pass filter circuit to realize coordinate transforma-tion is prosed in this paper.Furthermore,a double-loop control structure based on virtual DQ transformation which is realized by the aforementioned all-pass filter is further given.Then,the controller parameter is designed explicitly based on the analysis of system model and analog control circuit of the system is built.Finally,the relevant experiment results show the validation of the co-ordinate transform circuit and the accuracy of control parameters selection.