基于负载功率前馈一体化控制的双PWM变频调速系统的仿真  

Simulation of dual PWM variable frequency speed regulation system based on load power feed-forward integrated control

作　　者：李瑾[1] 王翠[1] LI Jin;WANG Cui(School of Electrical Engineering,Nanchang Institute of Technology,Nanchang 330099,China)

机构地区：[1]南昌工程学院电气工程学院,江西南昌330099

出　　处：《南昌工程学院学报》2023年第4期68-72,共5页Journal of Nanchang Institute of Technology

基　　金：江西省教育厅科学技术研究项目(GJJ211916)。

摘　　要：针对双PWM变频器整流侧与逆变侧独立控制时,直流侧必须利用大电容稳压,导致系统成本增加且寿命缩短的问题,提出一种整流侧采用引入新型开关矢量表的直接功率控制(Direct Power Control,DPC)方案。该方案逆变侧采用转子磁场定向矢量控制,并采用负载功率前馈控制策略,以实现双PWM变频器的协调控制。仿真实验结果表明,相比独立控制的双PWM变频调速系统,采用该一体化协调控制策略的双PWM变频调速系统,不仅能减小网侧电流的谐波,还可较好地抑制负载突变时直流电压的波动,加快整流侧和逆变侧的动态响应,大大提高系统的抗扰能力,从而减小电容体积并降低成本。This paper proposes a direct power control(DPC)scheme that introduces a new switch vector meter on the rectifier side to address the problem of adding a large volume capacitor to the voltage stabilization when the rectifier and inverter sides of a dual PWM inverter are independently controlled,which increases the cost and shortens the lifespan of the entire system.The inverter side of this scheme adopts rotor field oriented vector control and adopts a load power feed-forward control strategy to achieve coordinated control of dual PWM converters.The results of simulation experiments indicate that compared to the independent control dual PWM variable frequency speed regulation system,the dual PWM variable frequency speed regulation system using this integrated coordinated control strategy can not only reduce the harmonic of the grid side current,but also effectively suppress the fluctuation of DC voltage when the load suddenly changes,accelerate the dynamic response of the rectifier and inverter sides,greatly improve the system's anti-interference ability,thereby reducing the capacitance volume and reducing costs.

关 键 词：变频调速 双PWM 直接功率控制 负载功率前馈 一体化控制 

分 类 号：TM343[电气工程—电机]