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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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DC fault detection and location in meshed multi-terminal HVDC systems based on DC reactor voltage change rate

Li, Rui and Xu, Lie and Yao, Liangzhong (2016) DC fault detection and location in meshed multi-terminal HVDC systems based on DC reactor voltage change rate. IEEE Transactions on Power Delivery. ISSN 0885-8977 (In Press)

Text (Li-etal-IEEETPD2016-DC-fault-detection-and-location-in-meshed-multi-terminal-HVDC-systems)
Li_etal_IEEETPD2016_DC_fault_detection_and_location_in_meshed_multi_terminal_HVDC_systems.pdf - Accepted Author Manuscript

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The change rate of the DC reactor voltage with predefined protection voltage thresholds is proposed to provide fast and accurate DC fault detection in a meshed multi-terminal HVDC system. This is equivalent to the measurement of the second derivative of the DC current but has better robustness in terms of EMI noise immunization. In addition to fast DC fault detection, the proposed scheme can also accurately discriminate the faulty branch from the healthy ones in a meshed DC network by considering the voltage polarities and amplitudes of the two DC reactors connected to the same converter DC terminal. Fast fault detection leads to lower fault current stresses on DC circuit breakers and converter equipment. The proposed method requires no telecommunication, is independent of power flow direction, and is robust to fault resistance variation. Simulation of a meshed three-terminal HVDC system demonstrates the effectiveness of the proposed DC fault detection scheme.