A Low-cost Scheme for Regenerative Braking Energy Recycling and Negative Sequence Current Compensation of the electrified railway

2021 IEEE Sustainable Power and Energy Conference (iSPEC) Pub Date : 2021-12-23 DOI:10.1109/iSPEC53008.2021.9735793

Cheng Che, Jingjing Peng, Yanwen Wang, Q. Lu, Xianghong Liu, Yang Chen, Bangbang He

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Abstract

To ease the increasing electrical energy demand, reduce the operation cost, and improve the power quality of the electrified railway, a low-cost scheme is proposed for recycling the regenerative braking energy and compensating the negative sequence current (NSC). The hardware part of this scheme consists of two three-winding transformers, a railway power conditioner (RPC), a bidirectional DC-DC converter, an energy storage system (ESS), four sets of thyristor-switched capacitors (TSCs) and four sets of thyristor-controlled reactors (TCRs). In this paper, firstly, the structure and working principle of the proposed scheme are introduced, and the device capacity of the RPC for the reactive power compensation is analyzed. Then, the control strategy of each component is designed. Finally, the simulation results are presented to demonstrate that the proposed scheme can not only effectively utilize the regenerative braking energy, but also economically solve the power quality problem.

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电气化铁路制动能量再生回收及负序电流补偿的低成本方案

为缓解电气化铁路日益增长的电能需求，降低运行成本，提高电能质量，提出了一种低成本的制动再生能量回收和负序电流补偿方案。该方案的硬件部分包括两个三绕组变压器、一个铁路电源调节器(RPC)、一个双向DC-DC变换器、一个储能系统(ESS)、四组晶闸管开关电容器(tsc)和四组晶闸管控制电抗器(tcr)。本文首先介绍了该方案的结构和工作原理，并对RPC进行无功补偿的装置容量进行了分析。然后，设计了各部件的控制策略。仿真结果表明，该方案既能有效利用再生制动能量，又能经济地解决电能质量问题。

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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2021 IEEE Sustainable Power and Energy Conference (iSPEC)

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