【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。更多还原

【Abstract】 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.更多还原