Development and Optimization of High-Power and Medium-Voltage Battery Energy Storage System Based on CHB Converter

Articles in Press

Document Type : Research paper

Authors

1 Faculty of Electrical and Computer Engineering, Babol Noshirvani University of Technology, Babol, Iran.

2 School of Technology and Innovations, Flexible Energy Resources, University of Vaasa, 65200 Vaasa, Finland.

Abstract

Battery energy storage systems have become an integral part of electrical systems in various applications, including stabilizing and increasing the reliability and efficiency of utility grids, and they play an essential role in directly injecting the power generated from renewable sources into the grid. Therefore, investigating and conducting extensive research on various aspects of BESS, such as development, optimization, production, and installation, is essential. One of the challenges of using low-voltage BESS for medium-voltage and high-power applications is that, since two and three-level converters are not able to generate high voltage and also inject high power into the utility grid, it is necessary to utilize step-up transformers, which apart from being bulky, large and expensive, also cause damage to the system. Therefore, multi-level topologies are needed. Hence; this paper describes the development process of a 20-kV and 8-MW BESS based on a cascaded H-bridge converter with a focus on optimization of the most crucial system parameters, including switching loss in semiconductors, LCL filter, and DC-link capacitor by using Pareto Front method to minimize the overall loss, which leads to better performance and high efficiency. To verify the proper performance of the control strategy and evaluation of output results, the optimized system has been simulated in MATLAB/SIMULINK, and the system waveforms have been presented and discussed.

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References

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Journal of Operation and Automation in Power Engineering

Articles in Press, Corrected Proof
Available Online from 23 November 2024

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History

  • Receive Date: 29 April 2024
  • Revise Date: 16 July 2024
  • Accept Date: 20 July 2024
  • First Publish Date: 23 November 2024

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