Switch yard and isolation control design for DC/AC/DC converter operating at power reversal condition in LCC-HVDC system

Li, Chuanyue ORCID: https://orcid.org/0000-0001-6835-6642, Wang, Sheng ORCID: https://orcid.org/0000-0002-2258-2633 and Liang, Jun ORCID: https://orcid.org/0000-0001-7511-449X 2017. Switch yard and isolation control design for DC/AC/DC converter operating at power reversal condition in LCC-HVDC system. Presented at: 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe), Warsaw, Poland, 11-14 September 2017. 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe). IEEE, 10.23919/EPE17ECCEEurope.2017.8098981

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Abstract

As one type of the interconnected device between HVDC systems, the DC/AC/DC converter is able to achieve high-voltage connection and bulk-power transportation, which makes this device fit the interconnection of LCC-HVDCs. To achieve an efficient interconnected LCC-HVDC system, the DC/AC/DC converter is possible to operate under the condition that one LCC-HVDC runs at normal operation and the other at the operation of power reversal. This requests the DC/AC/DC converter to regulate power in terms of the interconnection between positive voltage and the negative. Considering the economy of the interconnection, the DC/AC/DC converter uses half-bridge sub-modules, which is not able to connect the negative-voltage system. To achieve the ability of negative-voltage connection, a switch yard is proposed to reverse the voltage polarity of DC/AC/DC converter. And a control system of the DC/AC/DC converter is proposed to protect the normal LCC-HVDC from the influence of LCC-HVDC during power reversal.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	IEEE
ISBN:	978-90-75815-27-6
Last Modified:	22 May 2023 01:18
URI:	https://orca.cardiff.ac.uk/id/eprint/112395

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