西门子新一代多功能型模块化多电平高压变频器

Siemens Next Versatile Medium Voltage Drive Based on M2C Topology

模块化多电平变换器(M2C)不仅具有模块化设计的优点,而且具有公共的直流母线和交流侧,可以直接应用于中高压大功率有功变换场合。西门子已于2010年首次成功将该拓扑应用于高压直流输电,并基于该拓扑开发了高压大功率电机传动应用的变频器,该变频器具有更加快速可靠的单元旁路、更加灵活的变压器设计和布局(如变压器柜与功率单元柜分离放置)等特点。详细介绍了M2C拓扑的结构与原理;并对M2C高压变频器和目前工业应用的主要高压变频器的系统可靠性进行了比较分析;最后介绍了西门子新一代多功能型模块化多电平高压变频器SINAMICS GH150的技术特点。

Modular multilevel Converter （M2C） not onty benefits from its modular design but also distinguishes itself by common DC bus and input AC side, which enable it directly applied to high voltage active power convert. Siemens has made use of these attractive features and has already first high voltage direct current systems （HVDC） applications in operation since 2010. Now Siemens has developed a water cooled, medium voltage drive based on the M2C topology （SINAMICS GHI50） serving the high power applications. It provides advanced features, such as a high speed cell bypass （activation in less than one millisecond） and more transformer flexibility. The aim of this article is to introduce the M2C principle and compare the reliability of current mainly used voltage source drive topologies. Then it briefly introduces the SINAMICS GHI50 medium voltage drive.