Co-phase power supply system based on double star multilevel power flow controller and YNvd transformer

被引：0
|
作者：
Zhou J. [1 ]
Luo L. [1 ]
Wang H. [1 ]
机构：
[1] College of Electrical and Information Engineering, Hunan University, Changsha
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2019年 / 47卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Balanced transformer; Co-phase power supply system; Harmonic; Modular multilevel converter (MMC); Negative sequence current; Power flow controller (PFC);
D O I：
10.7667/PSPC180557
中图分类号：
学科分类号：
摘要：
In order to solve the problem of negative sequence current, harmonic current and electric phase splitting in high-speed railway power supply system, a novel co-phase power supply system based on Double Star Multilevel Power Flow Controller (DS-MPFC) and YNvd balanced transformer is proposed in this paper. This DS-MPFC which consists of four H-Bridge links is AC-AC conversion circuit structure and no direct current bus capacitance is required. Different from the conventional power flow controller based co-phase power supply systems, this system integrates DS-MPFC into the phase-β side flexible taps of YNvd balance transformer instead of into phase-β side via a step-down and isolation transformer, thus the costs are reduced significantly. The topology structure and the working principle are analyzed, furthermore, a synthetical control strategy is proposed. The simulation results show the feasibility and effectiveness of the proposed method. © 2019, Power System Protection and Control Press. All right reserved.
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页码：9 / 16
页数：7
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