【摘要】 在一个三相直接式多电平电流型逆变器(CSI)中利用PWM技术来消除输出电流谐波是非常困难的,为此提出了一种新的三相直接式五电平拓扑,并分析了其工作原理。文中运用解耦的方式,提出一种针对该拓扑的PWM控制技术,最终建立了一个三相五电平CSI的实验系统,验证了结论。随着超导储能系统技术的发展及应用,电流型多电平变流器将具有广泛的应用前景。更多还原

【Abstract】 It is very difficult to use PWM technique for reducing the harmonic contents of the output currents in a three-phase direct-type multi-level current-source inverter (CSI).A new type of three-phase five-level CSI is proposed,the operation principle of one phase of the CSI is analyzed.A new PWM method based on decoupled signal is introduced in this article.An experimental prototype of a three-phase five-level CSI was built to practise the proposition.With the development and application of superconducting magnetic energy storage (SMES) technology,the application of multi-level CSI will be more and more popular.更多还原