DC link balancing method in back-to-back UPS system with multi-level converters

被引：5

作者：

Grzesiak, Lech M. ^{[1
]}

Tomasik, Jacek ^{[1
]}

机构：

[1] Warsaw Univ Technol, Inst Control & Ind Elect, PL-00662 Warsaw, Poland

来源：

2006 IEEE INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS, VOLS 1-7 | 2006年

关键词：

D O I：

10.1109/ISIE.2006.295756

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Paper presents a novel topology of a grid-connected back-up uninterruptible power supply (UPS) system with multilevel converters. The star-configuration three-phase "back-to-back" topology with a five-level diode-clamped rectifier (5LDCR) and a five-level diode-clamped inverter (5LDCI) supplies a three phase output load. The proposed multi-level current mode control techniques in both converters provide an effective solution to an imbalance problem with the capacitor voltages in a dc link network. The interfaced battery energy storage (BES), which constitutes an integral part of the entire UPS system, supplies the dc link capacitor voltages to the 5LDCI in a standby emergency mode because the proposed balancing method is constrained to the "back-to-back" operation only. Importantly, the UPS system is able to operate with an asymmetrical, a nonlinear and an impact loads in three phases and it provides the power factor correction on the grid side.

引用

页码：908 / +

页数：2

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