电气化铁路牵引变电所群贯通供电系统及其关键技术

doi:10.19595/j.cnki.1000-6753.tces.191740

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Abstract Combined with the external power supply modes of electrified railway and the power supply modes of traction power supply system, the interconnected power supply system of traction substation group is proposed, and its key technical schemes are studied. Firstly, according to the methods of negative sequence compensation, the interconnected power supply schemes of traction substation group are divided into centralized compensation and distributed compensation. Among them, the centralized compensation schemes are divided into N mode and N+1 mode. Secondly, the compensation modes are divided into two-port and three-port for the compensation methods of negative sequence with reactive power. Taking YNd11 connection transformer as an example, the basic principle of negative sequence compensation is illustrated, and the power flow control system of centralized compensation is introduced. Then, the technical scheme of section protection and state identification for interconnected traction network is introduced. Finally, the external power supply scheme is discussed. Taking the measured data of a certain line an example, the balanced current under the situation of tree structure is studied. The results show that the power supply mode of the structure of the tree structure can maximize the power supply without balanced current.

Key words： Traction substation group interconnected power supply negative sequence com- pensation static var generator (SVG) section protection and state identification

Received: 11 December 2019

PACS:	TM922.3
	U223

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	Li Qunzhan
	Wang Hui
	Huang Wenxun
	Xie Shaofeng
	Ma Qing'an

Cite this article:

Li Qunzhan,Wang Hui,Huang Wenxun等. Interconnected Power Supply System of Traction Substation Group and Its Key Technologies for the Electrified Railway[J]. Transactions of China Electrotechnical Society, 2021, 36(5): 1064-1074.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191740 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I5/1064

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