适合于并网型多重化逆变器的调制方法  

A Modulation Method for Grid-Connected Multiple Structure Inverter

作　　者：高志刚[1] 张雷[1] 付勋波[1] 李建林[1] 赵斌[1] 

机构地区：[1]中国科学院电工研究所,北京市海淀区100190

出　　处：《电网技术》2008年第20期64-67,共4页Power System Technology

摘　　要：并网型多重化逆变器各逆变桥的输出经变压器耦合后接入电网,提高了并网逆变器的容量等级。针对两单元多重化逆变器,提出一种载波相移正弦调制方法,可以在低次开关频率下提高系统的等效开关频率,提高各逆变器组工作的一致性,实现更好的谐波相抵效果,具有更快的实时性。最后进行了实验验证,该方法还可扩充应用到n单元并网型多重化逆变器中,应用前景好。The output of each inverter bridge of a grid-connected multiple structure inverter （MSI） is connected into power grid through transformer coupling and by this means the capacity of grid-connected inverter increases. For two-bridge MSI, the authors propose a method called CPS-SPWM, which combines carrier phase shifted （CPS） with sinusoidal pulse width modulation （SPWM）, to increase the equivalent switching frequency under low switching frequency and make the inverter bridges working more synchronically for better effect of canceling out harmonics each other and increasing response speed. The experimental verification of this topic is performed. The proposed method can be extended to apply to grid-connected MSI inverter with n-inverter bridges and is worthy of extension.

关 键 词：多重化逆变器 正弦脉宽调制 载波相移 

分 类 号：TM464[电气工程—电器]