An Intelligent Method for Fault Location Estimation in HVDC Cable Systems Connected to Offshore Wind Farms

Author:

Ashrafi Niaki Seyed Hassan1,Sahebkar Farkhani Jalal1ORCID,Chen Zhe1,Bak-Jensen Birgitte1ORCID,Hu Shuju2

Affiliation:

1. Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark

2. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100049, China

Abstract

Large and remote offshore wind farms (OWFs) usually use voltage source converter (VSC) systems to transmit electrical power to the main network. Submarine high-voltage direct current (HVDC) cables are commonly used as transmission links. As they are liable to insulation breakdown, fault location in the HVDC cables is a major issue in these systems. Exact fault location can significantly reduce the high cost of submarine HVDC cable repair in multi-terminal networks. In this paper, a novel method is presented to find the exact location of the DC faults. The fault location is calculated using extraction of new features from voltage signals of cables’ sheaths and a trained artificial neural network (ANN). The results obtained from a simulation of a three-terminal HVDC system in power systems computer-aided design (PSCAD) environment show that the maximum percentage error of the proposed method is less than 1%.

Funder

Sino-Danish Center (SDC) for Education and Research

Publisher

MDPI AG

Reference48 articles.

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4. Koldby, E., and Hyttinen, M. (2009, January 10–11). Challenges on the Road to an Offshore HVDC Grid. Proceedings of the Nordic Wind Power Conference, Bornholm, Denmark.

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