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

Li, Chuanyue, Wang, Sheng and Liang, Jun 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: 14 Aug 2019 08:28
URI: http://orca.cf.ac.uk/id/eprint/112395

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