无电网电压传感器的三相桥式PWM整流  

Three-Phase Bridge PWM Rectification without Grid Voltage Sensor

作　　者：罗华 王尊 彭天玲 Luo Hua;Wang Zun;Peng Tianling(China Machinery International Engineering&Technology Research Institute Co.,Ltd.,Changsha 410007,China)

机构地区：[1]中机国际工程技术研究院有限责任公司,湖南长沙410007

出　　处：《防爆电机》2023年第2期62-66,共5页Explosion-proof Electric Machine

摘　　要：三相PWM(Pulse Width Modulation)制整流技术已经广泛应用于电气工程领域,在大型电机实验站中更是核心设备之一。在常规的PWM整流装置中,一般先是通过对电网电压进行采样,然后通过数字锁相环来对电网电压进行锁相,并建立旋转坐标系来实现闭环控制。本文提供了一种无电网电压传感器的运行方案,通过受控状态下的短路电流来获取设备运行的初始相位角,再通过调制波和电流建立对电网电压的闭环观测,实现整流系统的无电网电压传感器运行。Three-phase PWM(Pulse Width Modulation)rectification technology has been widely used in the field of electrical engineering,which is one of the core equipment in large motor experimental stations.For the conventional PWM rectification device,the grid voltage is commonly sampled and then is carried out lock phase by digital phase-locked loop,which can achieve closed-loop control by establishing a rotating coordinate system.This paper provides an operation scheme without grid voltage sensor,which obtains an initial phase angle of the operating equipment through the controlled short-circuit current,and then carries out a closed-loop observation of grid voltage through the modulated wave and current so as to achieve the operation of the rectification system without grid voltage sensor.

关 键 词：整流 无传感器 三电平 

分 类 号：TM301.3[电气工程—电机]