摘要
提出了一种无交流电流传感器的PWM整流器控制方法,交流电流通过检测开关状态和直流电流进行电流重构获得,进行最小调制时间补偿控制以确保正确重构交流电流。整流器采用空间矢量PWM电流控制,控制系统采用电压外环和电流内环的双闭环PI控制结构。研究表明,该控制策略有良好的控制性能,可以实现网侧电流正弦化和单位功率因数运行。
In this paper, an AC current sensorless control strategy of three-phase PWM rectifier is proposed. A method for reconstructing the AC current from the DC-link current and switch states is given. A method of modifying the switching state of PWM rectifier is given when the input currents cannot be reconstructed. SVPWM is used for controlling the rectifier's current, and the control system includes two PI controllers which are used to regulate the AC current and DC voltage. The feasibility of this strategy has been confirmed through computer simulations.
出处
《继电器》
CSCD
北大核心
2008年第8期68-72,共5页
Relay
关键词
整流器
无交流电流传感器
电流重构
rectifier
AC current sensorless
current reconstruction