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Novel Isolated Cascaded Half-Bridge Converter for Battery Energy Storage Systems
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| Author(s) |
Felix JAUCH, Jürgen BIELA |
| Abstract |
This paper presents a novel isolated cascaded half-bridge converter for medium voltage battery energy storage systems with three phase legs of series connected modules in star connection. Each module consists of a grid-side half-bridge, a battery-side full-bridge and a medium-frequency transformer providing isolation. The presented modulation ensures grid-side zero-current-switching (ZCS) and batteryside zero-voltage-switching (ZVS). The control system consists of a grid current control as well as a state of-charge (SOC) balancing control for the batteries. Evaluation of the proposed module of a 6.6 kV, 150 kW, 1MWh design example shows an average module efficiency of 97.4 \% including semiconductor and transformer losses. Simulation results verify the converter concept including the applied control structures. |
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| Filename: | 0232-epe2014-full-14171836.pdf |
| Filesize: | 1.349 MB |
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| Type |
Members Only |
| Date |
Last modified 2015-06-08 by System |
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