CONVERTER LOSS OPTIMIZATION OF CASCADED BATTERY ENERGY STORAGE SYSTEM FOR POWER FLUCTUATION STABILIZATION OF DC OUTPUT PHOTOVOLTAIC POWER STATION

被引：0
|
作者：
Song J. [1 ]
Chen G. [1 ]
Zhu Z. [2 ]
机构：
[1] Technology Center, Shanghai Electric Power Transmission & Distribution Group, Shanghai
[2] Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Shanghai Jiao Tong University, Shanghai
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2023年 / 44卷 / 11期
关键词：
battery energy storage system; circuit parameters optimization; DC-DC converters; modulation strategy optimization; PV power station;
D O I：
10.19912/j.0254-0096.tynxb.2022-1175
中图分类号：
学科分类号：
摘要：
The high-frequency isolated bidirectional DC-DC converter is a key component of cascaded battery energy storage system，which should meet the requirements of wide voltage gain range and high efficiency.In the cascade battery energy storage system，aiming at the problem of efficiency reduction of dual active bridge（DAB）under wide gain range due to backflow power and high current at switching time，on the basis of three phase shift（TPS）modulation strategy，an optimized modulation strategy based on interior point method is proposed，which takes the total loss as the optimization objective. The proposed strategy constructs a unified loss model of DAB under different gains. On the basis of ensuring the soft switching（ZVS）of the switching devices，the interior point method is used to obtain the optimal value of phase shift angle according to different battery open circuit voltage（OCV）. The influence of inductance value and switching frequency on the average efficiency of the whole voltage gain range is analyzed，which provides a reference for DAB parameter design. A 5 kW low-power experimental platform was constructed to verify the effectiveness of the optimized modulation strategy. © 2023 Science Press. All rights reserved.
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页码：100 / 109
页数：9
相关论文
共 15 条
  • [1] LU S Y, ZHOU B R，, RAO H, Et al., Research of the prospect of China power generation structure with high proportion of photovoltaic generation［J］, Proceedings of the CSEE, 38, S1, pp. 39-44, (2018)
  • [2] YANG J T，, WU X Q，, LI R，, Et al., Research on submodules voltage-power self-tracking control method for medium-voltage direct-linked photovoltaic power generation system［J］, Proceedings of the CSEE, 41, 8, pp. 2815-2825, (2021)
  • [3] AKAGI H., Theoretical comparison in energy-balancing capability between star-and delta-configured modular multilevel cascade inverters for utility- scale photovoltaic systems［J］, IEEE transactions on power electronics, 31, 3, pp. 1980-1992, (2016)
  • [4] PEREZ M A, Et al., DC- DC MMC for HVDC grid interface of utility-scale photovoltaic conversion systems［J］, IEEE transactions on industrial electronics, 65, 1, pp. 352-362, (2018)
  • [5] DING M, CHEN Z, Et al., An overview of battery energy storage system for renewable energy generation［J］, Automation of electric power systems, 37, 1, pp. 19-25, (2013)
  • [6] ZHAO B, SONG Q, Et al., Development and application of DC transformer based on dual-active-bridge ［J］, Proceedings of the CSEE, 41, 1, pp. 288-298, (2021)
  • [7] YAN S J, SHEN Q X, LI X J., Optimized SOC balancing control for high power modular energy storage system［J］, Power system technology, 45, 1, pp. 49-56, (2021)
  • [8] WU J J, MENG D Y，, SHEN Y F，, Et al., Optimal control strategy of dual active bridge DC- DC converter with combined dual- phase- shift and traditional- phase- shift controls［J］, Transactions of China Electrotechnical Society, 31, 19, pp. 97-105, (2016)
  • [9] LI J, YUAN L Q，, GU Q, Et al., An efficiency optimization method in dual active bridge DC- DC converter based on loss model ［J］, Transactions of China Electrotechnical Society, 32, 14, pp. 66-76, (2017)
  • [10] GUO H Y，, ZHANG X, ZHAO W G，, Et al., Optimal control strategy of dual active bridge DC- DC converters with extended-phase-shift control［J］, Proceedings of the CSEE, 39, 13, pp. 3889-3899, (2019)
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