Optimal configuration of energy storage system capacity in traction power supply system considering photovoltaic consumption

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-03-20 DOI:10.24425/aee.2024.148866

Wei Zhang, Xiaoqiang Chen, Ying Wang

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Abstract

In order to achieve energy savings and promote on-site integration of photovoltaic energy in electrified railways, a topology structure is proposed for the integration of photovoltaic (PV) and the energy storage system (ESS) into the traction power supply system (TPSS) based on a railway power conditioner (RPC). This paper analyzes the composition and operation principles of this structure. To assess the economic benefits brought by the integration of photovoltaic and energy storage systems, a bilevel optimization model is established, with the objectives of optimizing energy storage capacity configuration and photovoltaic energy integration. The KKT (Karush–Kuhn–Tucker) method is employed to transform the model into a single-layer mixed-integer linear programming model, which is then solved using the CPLEX solver in MATLAB. The research findings indicate that, with the configuration of the ESS, the optimal PV consumption rate achieved is 96.8749%. Compared to a 100% PV consumption rate, the ESS capacity configuration is reduced by 13.14%, and the overall operational cost of the TPSS is at its lowest. The study suggests that the proposed bilevel optimization algorithm can more effectively consider PV consumption, leading to enhanced economic performance of the TPSS operation.

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考虑光伏消费的牵引供电系统中储能系统容量的优化配置

为了在电气化铁路中实现节能并促进光伏能源的现场集成，本文提出了一种基于铁路电力调节器（RPC）的将光伏（PV）和储能系统（ESS）集成到牵引供电系统（TPSS）中的拓扑结构。本文分析了该结构的组成和运行原理。为了评估光伏和储能系统集成带来的经济效益，本文建立了一个双层优化模型，目标是优化储能容量配置和光伏能源集成。采用 KKT（Karush-Kuhn-Tucker）方法将模型转化为单层混合整数线性规划模型，然后使用 MATLAB 中的 CPLEX 求解器进行求解。研究结果表明，在配置 ESS 的情况下，实现的最佳光伏消耗率为 96.8749%。与 100%的光伏消耗率相比，ESS 容量配置降低了 13.14%，而 TPSS 的整体运营成本也降到了最低。研究表明，所提出的双层优化算法能更有效地考虑光伏消耗，从而提高 TPSS 运行的经济效益。

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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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.