同步发电机带三相PWM整流器的死区补偿方法  

Compensation Method for Synchronous Generators With Three-phase PWM Rectifiers

作　　者：秦腾 马瑞卿[1] 梁景智 樊平 QIN Teng;MA Ruiqing;LIANG Jingzhi;FAN Ping(School of Automation,Northwestern Polytechnical University,Xi’an 710129,China;School of Mining and Coal,Inner Mongolia University of Science and Technology,Baotou Inner Mongolia 014010,China)

机构地区：[1]西北工业大学自动化学院,西安710129 [2]内蒙古科技大学矿业与煤炭学院,内蒙古包头014010

出　　处：《微电机》2025年第1期1-6,共6页Micromotors

摘　　要：在永磁同步发电机(PMSG)与三相脉宽调制(PWM)整流器构成的PMSG-PWM发电系统中,由于三相整流器的死区效应会导致零电流箝位,出现交流发电侧电流谐波增加的现象,所以通过对死区效应的分析,提出一种单位功率因数(UPF)的脉宽调节死区补偿方法。该方法通过转子位置传感器获取交流侧电压相位,再由交流侧电压相位代替相电流相位进行极性判断,无需增加额外硬件电路,在补偿死区效应的同时可以避免零电流箝位的影响,准确判断电流方向。仿真和实验结果表明,所提的脉冲宽度死区方法应用于交流发电机的三相PWM整流器,可有效减小交流侧电流谐波,且满足PMSG-PWM发电系统变频变速运行工况下的单位功率因数控制需求。In a PMSG-PWM power generation system composed of a permanent magnet synchronous generator(PMSG)and a three-phase pulse-width modulated(PWM)rectifier,an increase in the harmonics of the current on the AC generation side occurs due to the dead-time effect of the three-phase rectifier,which results in the zero-current clamping,so a pulse-width-modulated dead-time compensation method for the unit power factor(UPF)was proposed by analyzing the dead-time effect.The method obtains the AC-side voltage phase through the rotor position sensor,and then the AC-side voltage phase replaces the phase current phase for polarity judgment without adding additional hardware circuits,which can avoid the influence of zero-current clamping while compensating for the dead-time effect and accurately judge the current direction.Simulation and experimental results show that the proposed pulse width dead-time method applied to the three-phase PWM rectifier of an AC generator can effectively reduce the AC-side current harmonics and meet the demand of unit power factor control under the variable speed operation condition of the PMSG-PWM power generation system.

关 键 词：死区补偿 死区效应 零电流箝位 单位功率因数 

分 类 号：TM351[电气工程—电机] TM341[自动化与计算机技术—检测技术与自动化装置] TP27[自动化与计算机技术—控制科学与工程]