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Energies 2017, 10(8), 1115; https://doi.org/10.3390/en10081115

A Current Frequency Component-Based Fault-Location Method for Voltage-Source Converter-Based High-Voltage Direct Current (VSC-HVDC) Cables Using the S Transform

Key Laboratory of Power System Intelligent Dispatch and Control, Shandong University, Ministry of Education, Jinan 17923, China
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Author to whom correspondence should be addressed.
Academic Editor: Fengshou Gu
Received: 5 July 2017 / Revised: 24 July 2017 / Accepted: 28 July 2017 / Published: 31 July 2017
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

This paper proposes a fault-location method for voltage-source converter (VSC)-based high-voltage direct current (VSC-HVDC) systems. This method relies on the current frequency components generated by faults in the cable, and requires the arrival time of the frequency components at two terminals. The S transform is a time–frequency analysis tool that is superior to the wavelet transform in some respects. Therefore, the S transform was employed to determine the arrival time in this paper. To obtain a reliable criterion, a novel phase-mode transform method for bipolar cables was developed, and the propagation characteristics of the current frequency components through out the cable were analyzed. A two-terminal VSC-HVDC system was modeled in power system computer aided design/electromagnetic transients including DC (PSCAD/EMTDC). Various faults under different conditions were simulated on the basis of this model, and the simulation results verified a high accuracy, robustness against fault-resistance, and noise immunity of the proposed method. View Full-Text
Keywords: current frequency component; DC cable; fault location; phase-mode transform; the S transform; VSC-HVDC current frequency component; DC cable; fault location; phase-mode transform; the S transform; VSC-HVDC
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Zhao, P.; Chen, Q.; Sun, K.; Xi, C. A Current Frequency Component-Based Fault-Location Method for Voltage-Source Converter-Based High-Voltage Direct Current (VSC-HVDC) Cables Using the S Transform. Energies 2017, 10, 1115.

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