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DC current flow controller with fault current limiting and interrupting capabilities

Xu, Jianzhong, Li, Xinyu, Li, Gen and Zhao, Chengyong 2021. DC current flow controller with fault current limiting and interrupting capabilities. IEEE Transactions on Power Delivery 36 (5) , pp. 2606-2614. 10.1109/TPWRD.2020.3023113

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Conventionally, the current flow control and DC fault protection issues of HVDC grids are supposed to be solved by the DC current flow controller (CFC) and DC circuit breaker (DCCB) separately, which may result in a high capital cost. This paper proposes a CFC topology with DC fault current limiting and interrupting capabilities. The topology and operating principle of the CFC are presented with theoretical analysis. The control strategies under normal and fault conditions are described. In order to reduce the use of IGBTs, an H-bridge inter-line CFC with fault current limiting capability is further proposed based on the first proposed CFC. The proposed CFCs are tested in PSCAD/EMTDC. Simulation results show that the proposed two CFCs can effectively control the current flow of two lines during normal operation and limit and interrupt DC fault currents.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
ISSN: 0885-8977
Date of First Compliant Deposit: 8 September 2020
Date of Acceptance: 7 September 2020
Last Modified: 07 Oct 2021 00:19

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