摘要
文中提出了一种新的PWM整流控制技术的在线式UPS,提出的原因是在不平衡负载下的全桥三相逆变器分析Bessel函数使用标准空间矢量PWM开关方案,其中涉及直流环节电流和电压波动的逆变器的负载平衡。采用滤波器的电压控制回路,提出以消除二次谐波成分的直流环节电压反馈信号,实现均衡的三相输入电流。通过仿真和实验结果证明了在不平衡负载下整流和逆变的有效性。
In this paper,a novel PWM rectifier control technique for on-line UPS under unbalanced load is presented.The unbalance load,the standard space vector PWM switching scheme is used to analyze Bessel function of full bridge three-phasewhich relates the inverter load balancing between dc link current and voltage ripples.A notch filter based voltage control loop is proposed to eliminate the second harmonic component in the dc-link voltage feedback signal and achieve balanced three-phase input currents.The effectiveness of the proposed control technique in decoupling the rectifier and the inverter under unbalanced load are demonstrated by simulation and experimental.
出处
《通信电源技术》
2011年第4期53-55,共3页
Telecom Power Technology
