用于多电平级联变换器公用事业规模电池储能系统的分数额定DC-DC级

2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC) Pub Date : 2016-12-01 DOI:10.1109/SPEC.2016.7846101

C. Townsend, G. Mirzaeva, G. Goodwin, G. Konstantinou, J. Pou

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引用次数: 5

摘要

用于电池储能系统(bess)的多电平级联转换器可以利用并联dc/dc转换级。这些级将每个电池组电压从相关的h桥电容电压中解耦。去耦防止二次谐波电流纹波在电池中流动，并补偿由于充电状态引起的电池电压变化。本文建议使用串联的分数额定值dc-dc转换级来代替并联变换器。串联转换器显示出保持电压去耦的好处，但其额定功率明显低于并联转换器。较低的额定功率有助于减少半导体损耗和降低BESS的成本。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Fractionally-rated DC-DC stages for use in multilevel cascaded converter utility-scale battery energy storage systems

Multilevel cascaded converters for use in battery energy storage systems (BESSs) can utilise parallel-connected dc/dc conversion stages. These stages decouple each battery string voltage from the associated H-bridge capacitor voltage. Decoupling prevents second harmonic current ripple flowing in the batteries and compensates for variation in battery voltage due to state of charge. Instead of parallel-connected converters, this paper proposes use of series-connected fractionally-rated dc-dc conversion stages. Series-connected converters are shown to maintain the benefits of voltage decoupling but with significantly lower power ratings than their parallel-connected counterparts. Lower power ratings can facilitate a reduction in semiconductor losses and a lower cost for the BESS.

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2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)

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