Comprehensive Compensation Scheme and Control Strategy of Cophase Power Supply for Electrified Railway Based on Vv-SVG

被引：0
|
作者：
Wang H. [1 ]
Li Q. [1 ]
Xie S. [1 ]
Gao S. [1 ]
机构：
[1] School of Electric Engineering, Southwest Jiaotong University, Chengdu
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2021年 / 43卷 / 09期
关键词：
Co-phase power supply; Comprehensive compensation; Negative sequence; Static var generator; Vv connection transformer;
D O I：
10.3969/j.issn.1001-8360.2021.09.007
中图分类号：
学科分类号：
摘要：
Aiming at the co-phase power supply with one substation and the long-distance interconnected co-phase power supply, a comprehensive compensation scheme and control strategy for the co-phase power supply of electrified railway based on Vv-SVG were proposed. The composition of co-phase power supply system based on Vv-SVG was introduced, and the comprehensive compensation scheme of co-phase power supply was divided into two-port and three-port compensation modes. Based on the phasor diagram, the principle of negative sequence comprehensive compensation under traction and regeneration conditions was analyzed. By introducing constraint factor of negative sequence and constraint factor of reactive power, the mathematical model of negative sequence comprehensive compensation under two-port and three-port compensation modes and model of harmonic current compensation at point of common coupling were obtained. Based on the instantaneous reactive power theory, the control strategy was proposed which is suitable for the proposed comprehensive compensation scheme. In the case of the data of a traction substation, the effectiveness of the proposed method was illustrated, and the capacity of the compensation device can be reduced. The simulation results show the correctness of the proposed comprehensive compensation scheme and control strategy. © 2021, Department of Journal of the China Railway Society. All right reserved.
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页码：46 / 55
页数：9
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