基于相位补偿的高频Vienna整流器解耦控制方法  

Decoupling Control Method for High-frequency Vienna Rectifier Based on Phase Compensation

作　　者：杨青松 熊慧 石健将[1] YANG Qingsong;XIONG Hui;SHI Jianjiang(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学电气工程学院,杭州310027

出　　处：《电源学报》2023年第4期27-37,共11页Journal of Power Supply

摘　　要：针对三相三线制Vienna整流器控制频率与输入电压频率比值较低时dq轴耦合加剧的问题,采用基于复系数传递函数的方法,推导了Vienna整流器电流环的开环传递函数。在同步旋转坐标系下,建立了考虑数字控制延时后的电流环复系数控制模型,对该模型的分析与研究表明,考虑数字控制延时后,传统电流前馈解耦方法不能实现完全解耦。为解决此问题,提出了一种带相位补偿的电流前馈解耦控制方法。该方法将输出的控制信号乘上延时对应的相位补偿量后作为新的控制信号,以消除延时对控制环路的影响,有效提高了电流环的性能。最后搭建了1 000 W的Vienna整流器仿真与实验平台进行验证,仿真与实验结果证明了所提控制策略的有效性。Aimed at the problem of intensified dq axis coupling when the ratio of the control frequency to the input voltage frequency of a three-phase three-wire Vienna rectifier is low,a method based on the complex coefficient transfer function is adopted to derive the open-loop transfer function of the current loop in the Vienna rectifier.Under the synchronous rotating coordinate system,a complex-coefficient control model of current loop considering the digital control delay is established.The analysis of this model shows that the traditional current feedforward decoupling method cannot achieve complete decoupling when considering the digital control delay.To solve this problem,a current feedforward decoupling control method with phase compensation is proposed,in which the output control signal multiplied by the phase compensation amount corresponding to the delay is taken as a new control signal,thus eliminating the influence of the delay on the control loop and effectively improving the performance of current loop.Finally,simulation and experimental platforms of a 1 000 W Vienna rectifier were built for verification,and simulation and experimental results proved the effectiveness of the proposed control strategy.

关 键 词：VIENNA整流器 数字控制延迟 耦合 低载波比 复系数 

分 类 号：TM46[电气工程—电器]