Wavelet transform based differential protection for mvdc distribution network

Li, Yaxi, Mohan, Vageesh, Jiang, Songfang, Wang, Yaoqiang and Liang, Jun ORCID: https://orcid.org/0000-0001-7511-449X 2022. Wavelet transform based differential protection for mvdc distribution network. Presented at: 2022 57th International Universities Power Engineering Conference (UPEC), Istanbul, Turkey, 30 Aug 22 - 02 Sept 22. 2022 57th International Universities Power Engineering Conference (UPEC). 10.1109/UPEC55022.2022.9917599

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Abstract

A short-circuit fault on the DC side in a MVDC distribution network can cause the rapid drop of inter electrode voltage and the large overcurrent, which will have a serious impact on reliable power supply and cause severe damage to voltage source converters. Requirements of fast and accurate detection and isolation techniques against such DC faults presents a challenge. In this paper, a current differential protection scheme based on the wavelet transform is used to identify the faults. Fault currents are decomposed in order to identify the fault area. A corresponding model is built based on PSCAD/EMTDC, the effectiveness of the proposed protection scheme and the effects of transition resistance and noise are verified, the operation time also meets the requirement of protection scheme for rapidity.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Schools:	Engineering
Last Modified:	30 Nov 2022 16:00
URI:	https://orca.cardiff.ac.uk/id/eprint/154531

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