无交流电流传感器PWM整流器电流重构  

Current reconstruction of PWM rectifier of AC current sensor

作　　者：郑征[1] 王沁东 王鹏超[1] 朱艺锋[1] 

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454000

出　　处：《河南理工大学学报（自然科学版）》2017年第3期111-118,共8页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(U1504518)

摘　　要：由于省去了三相交流电流传感器,所以PWM整流器的无交流电流传感器控制必须采用一定算法对交流电流进行重构。一般是基于空间矢量脉宽调制(SVPWM)算法,该方案存在的问题是在扇区切换处附近重构电流会发生波形畸变。针对该问题提出一种基于坐标变换和一阶低通滤波的重构处理策略,将重构电流进行坐标变换和低通滤波,解决了无交流电流传感器控制重构电流的波形畸变问题,简化了控制系统。仿真和实验结果验证了电流重构处理策略的正确性。Due to the omission of AC current sensors, the AC current needs to be reconstructed through a cer-tain algorithm in the control strategy without AC current sensor. The current reconstruction usually is based on space vector pulse width modulation （ SVPWM） , and the problem of this scheme is that the reconstructed cur-rent waveform appears distortion near the sector switch area. A novel current reconstruction processing strategy which combines coordinate transformation and low pass filtering（ LPF） is proposed, in which the reconstructed current is carried out coordinate conversion and low pass filtering. This reconstruction strategy can solve the problem of reconstruction current distortion, simplify the control system. The simulation and experimental re-sults verify the correctness of the current reconstruction strategy.

关 键 词：PWM整流器 电流重构 低通滤波 坐标变换 

分 类 号：TM461[电气工程—电器]