A 10 kV/1 MW High-Frequency-Isolated Power Conversion System for Battery Energy

Ning Xie, Jie Shu, Jiongcong Chen, Hao Wang and Fei Xie
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Ning Xie: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510642, China
Jie Shu: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510642, China
Jiongcong Chen: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510642, China
Hao Wang: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510642, China
Fei Xie: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510642, China

Energies, 2022, vol. 15, issue 14, 1-18

Abstract: Energy storage technology has become critical for supporting China’s large-scale access to renewable energy. As the interface between the battery energy storage system (BESS) and power grid, the stability of the PCS (power conversion system) plays an essential role. Here, we present a topology of a 10 kV high-voltage energy storage PCS without a power frequency transformer for the establishment of a large-scale energy storage system. We analyzed the energy storage converter’s mechanism and characteristics and also introduced the power-control strategy of the HVAC (high-voltage AC) and LVDC (low-voltage DC) converter module. On this basis, a 10 kV/1 MW high-capacity PCS prototype was designed. Additionally, by simulation and experiment, we proved the correctness of the PCS scheme. The topology and control strategy proposed in this paper can provide cases and technical support for the subsequent promotion and application of new energy and power station energy storage.

Keywords: high-frequency isolation; power conversion system; DAB; power decoupling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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