半桥级联型三相多电平逆变器及其控制  

Half-bridge Cascaded Three-phase Multilevel Inverter and Its Control

作　　者：夏守行 朱飒飒[1] XIA Shouxing;ZHU Sasa(Institute of Information Technology,Wenzhou Vocational College of Science and Technology,Wenzhou 325006,China)

机构地区：[1]温州科技职业学院信息技术学院,温州325006

出　　处：《电源学报》2020年第6期139-145,共7页Journal of Power Supply

摘　　要：把传统级联型三相多电平逆变器的H全桥单元改为半桥单元,可减少一半的功率器件数和2个主电源。分别分析了倍压、等压电源供电情况下的正弦脉宽调制SPWM(sinusoidal pulse width modulation)控制方法以及调制结果。利用等能量和等电量方法,解出电源功率分配比和倒灌功率比。倍压电源供电逆变的倒灌功率,可通过增大电源电容量和PWM软件算法,使倒灌功率的影响减至很小。等压电源供电逆变,利用循环脉冲控制,可使除公用电源外的级联电源功率达到均衡。By changing the H full-bridge unit of the traditional cascaded three-phase multilevel inverter to a half-bridge unit,half of the number of power devices and two main power supplies can be reduced.In this paper,the sinusoidal pulse width modulation(SPWM)control method under the conditions of double-voltage and equal-voltage power supplies are analyzed respectively,together with the corresponding modulation results.By using the method of equal energy and equal electric quantity,the power distribution ratio and backward power ratio of power supply are solved.Through increasing the capacitance of power supply and using the PWM software algorithm,the influences of the backward power of the double-voltage power supply can be reduced to a small extent.The power of the cascaded power supply except the utility power can be balanced using the equal-voltage power supply inverter under cyclic pulse control.

关 键 词：级联多电平逆变器 半桥 SPWM 功率分配比 

分 类 号：TM464[电气工程—电器]