Research on Influence Mechanism of Negative-sequence Voltage of Power System on the Operating Characteristics of Railway Power Conditioner

ZHANG Jianhui; XU Yingying

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Research on Influence Mechanism of Negative-sequence Voltage of Power System on the Operating Characteristics of Railway Power Conditioner

更新时间：2025-12-08

- Research on Influence Mechanism of Negative-sequence Voltage of Power System on the Operating Characteristics of Railway Power Conditioner
- Vol. 46, Issue 7, Pages: 2398-2406(2020)
- 作者机构：
  
  华东交通大学电气与自动化工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 July 2020，
  
  Published：2020
- 稿件说明：
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ZHANG Jianhui, XU Yingying. Research on Influence Mechanism of Negative-sequence Voltage of Power System on the Operating Characteristics of Railway Power Conditioner[J]. 2020, 46(7): 2398-2406.
DOI：

ZHANG Jianhui, XU Yingying. Research on Influence Mechanism of Negative-sequence Voltage of Power System on the Operating Characteristics of Railway Power Conditioner[J]. 2020, 46(7): 2398-2406. DOI：

摘要

采用电压源换流器的铁路功率调节器（railway power conditioner

RPC）在交流电网电压平衡下具有抑制交流电网负序电流的作用

然而在交流电网电压不平衡时则不一定能抑制交流电网负序电流。为了揭示交流电网电压负序分量如何影响RPC运行特性及交流电网负序电流的作用机理

首先分析了RPC运行原理并建立了采用功率控制的补偿方案模型。其次

分析了交流电网电压负序分量对V/V变压器副边电压和电流的影响。再次

根据RPC控制过程

逐步揭示了负序分量如何影响RPC补偿特性的机理过程。然后

采用对称分量法

推导了交流电网电流不平衡度的解析表达式并对关键影响因素进行了分析。最后

采用电磁暂态仿真模型

多角度验证所给解析表达式的正确性。

Abstract

The voltage-source-converter-based railway power conditioner（RPC） has the ability to suppress the negative-sequence current under balanced power system; however

it may deteriorate the performance under unbalanced power systems. This paper aims to reveal how the negative-sequence voltage affects the operation characteristics of RPC and the mechanism process of negative-sequence current. Firstly

the principle of RPC is analyzed and the compensation scheme of power-controlled mode is established. Secondly

the effects of negative-sequence voltage on the voltage and currentof V/V transformer’s secondary side are analyzed. Thirdly

the mechanism process of how negative sequence voltage affects the compensation characteristics of RPC is revealed step by step. Then

the analytical expression of current unbalance coefficient is derived using a symmetric component method according to the RPC’s control process as well as the key influencing factors are also analyzed. Finally

the correctness of the analytical expression is verified from multiple aspects by using the electromagnetic transient simulation model.

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