A medium-voltage drive utilizing series-cell multilevel topology for outstanding power quality
A medium-voltage drive utilizing series-cell multilevel topology for outstanding power quality
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DOI：
10.1109/ias.1999.799213
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发表时间：
1999-10
期刊：
影响因子：
--
通讯作者：
R. Osman
中科院分区：
文献类型：
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作者：
R. Osman
早期的中压驱动器实现遭受输入和输出电流的高谐波含量、差的功率因数以及机器上的高共模电压和dv/dt的严重缺点。最近，已经对这些旧电路中的一些进行了修改，以提高其性能。但这些修复需要更多的开关设备和/或添加滤波器。基于PWM-IGBT变换器单元串联连接的中压功率变换的全新方法克服了所有这些困难，而无需滤波器。实际上，输入电流满足IEEE-519（1992）的最严格要求，并且没有输出电流谐波超过基波的1%。所有负载点的功率因数均高于95%，满载时的效率为96%。这种新型驱动器的分布式架构还提供了容错能力和极高的可用性。描述了这种新型驱动器的设计和构造，以及它提供这些出色性能特性的方法。还审查了从数百个业务单位收集的实地经验。
Early medium-voltage drive implementations suffered the serious drawbacks of high harmonic content of the input and output current, poor power factor, and high common mode voltage and dv/dt on the machine. Recently, there have been modifications applied to some of these old circuits to improve their performance. But these fixes require more switching devices and/or the addition of filters. A completely new method of medium-voltage power conversion based on the series connection of PWM-IGBT converter cells has overcome all of these difficulties without filters. In fact, the input current meets the most stringent requirements of IEEE-519 (1992), and no output current harmonic exceeds 1% of fundamental. Power factor above 95% at all load points and efficiency of 96% at full load are routinely attained. The distributed architecture of this new drive also provides fault tolerance and very high availability. The design and construction of this new drive is described, as well as the means by which it provides these outstanding performance characteristics. Field experience gathered from hundreds of operating units is also reviewed.