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无交流电流传感器的三相PWM整流器控制策略 被引量:1

AC current sensorless control of three-phase PWM rectifier
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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
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参考文献8

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共引文献14

同被引文献11

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