期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 32, 期 9, 页码 6913-6923出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2016.2629020
关键词
Battery energy storage; markov models; multilevel converter; reliability
资金
- UK Engineering and Physical Sciences Research Council [EP/K002252/1]
- EPSRC [EP/K002252/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K002252/1] Funding Source: researchfish
This paper presents a method for evaluating grid-connected battery energy storage system (BESS) designs. The steady-state power losses of the grid interface converter, the battery pack, and the balancing circuit are calculated. The reliability of each complete system is calculated using a Markov-based modeling approach that takes into account the built-in redundancy of the system as well as performance degradation caused by faults. Finally, a simple economic analysis based on capital cost and efficiency is used to provide a basis for direct comparison between competing system designs. Three design options for a 1-MW 1-MWh BESS connected at 11 kV are compared: a conventional BESS using parallel low voltage power blocks, a BESS using a high-voltage intelligent battery pack, and a BESS using a cascaded H-bridge converter. The results of the analysis indicate that additional power electronics included in the battery pack as part of the intelligent battery pack and H-bridge designs can enhance the reliability of the BESS by an order of magnitude under typical conditions, without increasing the overall cost of the system.
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