基于无闭锁直流自耦变压器的LCC-HVDC与VSC-HVDC互联系统

doi:10.19595/j.cnki.1000-6753.tces.L80556

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Abstract DC-DC converters play an indispensable role in interconnecting DC systems with different voltage levels. This paper investigates the feasibility of interconnecting LCC-HVDC and VSC-HVDC through an un-interrupted DC autotransformer (DC AUTO). The interconnected system aims at taking advantage of the two HVDC technologies respectively. To begin with, the system configuration and the potential benefits are illustrated. Then, the corresponding control strategies towards LCC-HVDC, VSC-HVDC, and the un-interrupted DC AUTO are proposed to ensure the interconnected system steady operation during both normal time and faulted conditions. Finally, a 4-terminal test system is built on PSCAD/EMTDC platform to validate the technical feasibility of the interconnected system and the effectiveness of the proposed control strategy.

Key words： DC autotransformer high voltage direct current DC grid hybrid MMC DC fault ride-through

Received: 01 July 2018 Published: 15 February 2019

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TM72

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	Articles by authors
	Yang Zhihan
	Li Mengbo
	Xiang Wang
	Lin Weixing
	Yao Liangzhong
	Wen Jinyu

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Yang Zhihan,Li Mengbo,Xiang Wang等. Research on the Interconnection System of VSC-HVDC and LCC-HVDC Based on Un-Interrupted DC-DC Autotransformer[J]. Transactions of China Electrotechnical Society, 2018, 33(zk2): 499-510.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80556 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/Izk2/499

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