四象限变频器整流控制特性分析及数字化实现  

Digital Control and Implementation of Rectifier for Four-quadrant Cascade Inverter

作　　者：宋明曙 马晓磊 朱清 SONG Ming-shu;MA Xiao-lei;ZHU Qing(State Grid Xinjiang Electric Co.,Ltd.,Urumqi 810008,China)

机构地区：[1]国网新疆电力有限公司,新疆乌鲁木齐810008

出　　处：《电力电子技术》2023年第1期131-136,共6页Power Electronics

基　　金：国家电网有限公司科技项目(5108-202136053A-0-0-00)。

摘　　要：提出了一种四象限级联型变频器脉宽调制(PWM)整流的控制策略。通过分析H桥逆变输出功率波动对直流母线电压稳定和PWM整流控制的影响,电压外环增加自调整的陷波器,电流内环采用比例谐振(PR)控制器减小交流侧参数变化对系统的影响。采用基于Delta算子的直接型结构,数字化实现了PR控制器和陷波器,给出了关键参数的设计准则。实验验证了PWM整流器及其控制策略在整流、逆变工况下的稳态、暂态运行情况,具有良好的四象限运行性能。A control strategy of pulse width modulation(PWM) rectifier for four-quadrant cascade inverter is proposed.Firstly,through analysis of the impact of the output power fluctuation of H-bridge inverter on the stability of the DC bus voltage and PWM rectifier control,a self-adjusting notch filter is added to the voltage outer loop.To reduce the impact of the variation of the AC side parameter on the control system,a proportional resonant(PR) controller is implemented to the current inner loop.And then,digital implementation of the PR controller and the notch filter with direct form structure based on delta operator are achieved and the design principles of the key parameters are given.Finally,the experimental verification of PWM rectifier and its control strategy has a good four-quadrant performance in steady-state and transient operation under the rectification and inversion.

关 键 词：变频器 脉宽调制整流 数字化实现 

分 类 号：TN773[电子电信—电路与系统]