基于YNd变压器与静止无功发生器的电气化铁路同相供电综合补偿方案

doi:10.19595/j.cnki.1000-6753.tces.190957

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摘要针对以负序为主的电气化铁路电能质量问题,提出一种基于YNd变压器与静止无功发生器（SVG）的电气化铁路同相供电综合补偿方案及控制策略。以YNd11变压器为例,将基于YNd变压器与静止无功发生器的同相供电综合补偿方案分为二端口补偿模式和三端口补偿模式。研究负序补偿的基本原理,构建二端口补偿模式和三端口补偿模式的同相供电综合补偿数学模型,并给出确定补偿方案的方法。根据不同的补偿模式数学模型,提出相应的补偿控制策略,通过仿真验证同相供电综合补偿方案及控制策略的正确性和有效性。结果表明,综合补偿方案能够实现公共连接点处因牵引负荷引起的负序问题的治理,并且不会带来新的电能质量问题,同时可兼顾治理公共连接点处牵引负荷带来的谐波问题。

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关键词 ：同相供电, 负序, YNd变压器, 静止无功发生器, 综合补偿

Abstract：Aiming at the mainly problem of power quality of electrified railways with negative sequence, a comprehensive compensation scheme and control strategy for cophase power supply of electrified railway based on YNd transformer and static var generator are proposed. Taking YNd11 transformer as an example, the comprehensive compensation schemes of cophase power supply based on YNd transformer and static var generator are divided into two-port compensation mode and three-port compensation mode. The basic principle of negative sequence compensation is studied, and the mathematical models of two-port compensation mode and three-port compensation mode of comprehensive compensation of cophase power supply are constructed, with which the method to determine the compensation scheme is given. According to different compensation modes, corresponding control strategies are proposed. According to different mathematical models of compensation mode, the corresponding compensation control strategies are proposed, and the correctness and effectiveness of the comprehensive compensation scheme and control strategy of cophase power supply are verified by simulation. The results show that the comprehensive compensation scheme can achieve the treatment of negative sequence problems caused by traction load at point of common coupling, with which will not bring about new power quality problems. At the same time, it can also deal with the harmonic problems caused by traction load at point of common coupling.

Key words： Cophase power supply negative sequence YNd transformer static var generator comprehensive compensation

收稿日期: 2019-07-31

PACS:	TM922.3
	U223.6

基金资助:国家自然科学基金（51877182）、四川省科技计划（2018GZ0044,2017CC0072）和包神铁路集团课题（2018H010286）资助项目

通讯作者: 王辉,男,1989年生,博士研究生,研究方向为牵引供电系统理论、电能质量分析与控制。E-mail：wanghuiswjtu@163.com

作者简介: 李群湛,男,1967年生,教授,博士生导师,研究方向为牵引供电系统理论、电能质量分析与控制等。E-mail：1qz3431@263.net

引用本文:

王辉, 李群湛, 李晋, 解绍锋, 黄文勋. 基于YNd变压器与静止无功发生器的电气化铁路同相供电综合补偿方案[J]. 电工技术学报, 2020, 35(17): 3739-3749. Wang Hui, Li Qunzhan, Li Jin, Xie Shaofeng, Huang Wenxun. Comprehensive Compensation Schemes of Cophase Power Supply of Electrified Railway Based on YNd Transformer and Static Var Generator. Transactions of China Electrotechnical Society, 2020, 35(17): 3739-3749.

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