High-power multitransistor-inverter uninterruptible power supply system

被引：77

作者：

Holtz, Joachim ^{[1
]}

Lotzkat, Wolfgang ^{[1
]}

Werner, Karl-Heinz ^{[1
]}

机构：

[1] Univ of Wuppertal, Wuppertal, West Ger

来源：

IEEE Transactions on Power Electronics | 1988年 / 3卷 / 03期

关键词：

Control Systems; Multivariable - Electric Networks; Switching - Electric Power Supplies to Apparatus - Electric Waveforms--Control - Pulse Width Modulation;

D O I：

10.1109/63.17945

中图分类号：

学科分类号：

摘要：

The active and reactive load distribution between n paralleled single-phase uninterruptible power supply (UPS) inverters is equalized by virtue of n-1 load-sharing control loops. The approach permits the construction of UPS systems of any desired power rating at maximum utilization of the power components. The method of harmonic cancellation decreases the switching frequency of the power devices while maintaining good dynamic performance. The design details of a 45-kVa UPS inverter system with 150% steady-state overload capability are presented. The performance under various operating conditions is illustrated by oscillograms.

引用

页码：278 / 285