模块化多电平变流器型中压直流牵引供电系统控制方法研究

doi:10.19595/j.cnki.1000-6753.tces.180485

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Abstract The traditional AC traction power supply system (TPSS) suffers from the problems such as power quality and neutral section. In this paper, the modular multilevel converter (MMC) based medium-voltage direct current (MVDC) TPSS for high-speed railways was studied. For the system operation and control, a coordinated control strategy for parallel operation between traction substations (TSSs) was proposed to restrain the traction network DC voltage fluctuation. Consequently, the traction network DC voltage quality can be improved to make the system more reliable and have higher plug-and-play performance. The small-signal model of the proposed strategy based on simplified equivalent model of MMC was built, and then the small-signal transfer function between the traction network voltage and the output current of TSS was deduced. The influence of TSS output current feed-forward control on the dynamic performance of the system was analyzed. The control system stability in the case of moving load was analyzed. Finally, considering the actual operation condition of TPSS, the simulation model was established and the proposed strategy was verified.

Key words： Medium-voltage direct current traction power supply system (MVDC TPSS) modular multilevel converter (MMC) small-signal model current feed-forward control

Received: 02 April 2018 Published: 03 September 2018

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TM922.3

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	Ge Yinbo
	Hu Haitao
	Yang Xiaowei
	He Zhengyou
	Gao Shibin

Cite this article:

Ge Yinbo,Hu Haitao,Yang Xiaowei等. Research on Control Strategy of Modular Multilevel Converter based Medium-Voltage Direct Current Traction Power Supply System[J]. Transactions of China Electrotechnical Society, 2018, 33(16): 3792-3801.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180485 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I16/3792

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