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Energies 2017, 10(10), 1543; https://doi.org/10.3390/en10101543

Modeling of HVDC System to Improve Estimation of Transient DC Current and Voltages for AC Line-to-Ground Fault—An Actual Case Study in Korea

1
Department of Electrical and Computer Engineering, Seoul National University, 1 Gwanak-ro, Seoul, Korea
2
Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk 37673, Korea
3
Transmission & Distribution Lab., the R&D Center of Korea Electric Power Co., Daejeon 305-380, Korea
*
Author to whom correspondence should be addressed.
Received: 30 July 2017 / Revised: 27 September 2017 / Accepted: 30 September 2017 / Published: 6 October 2017
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

A new modeling method for high voltage direct current (HVDC) systems and associated controllers is presented for the power system simulator for engineering (PSS/E) simulation environment. The aim is to improve the estimation of the transient DC voltage and current in the event of an AC line-to-ground fault. The proposed method consists primary of three interconnected modules for (a) equation conversion; (b) control-mode selection; and (c) DC-line modeling. Simulation case studies were carried out using PSS/E and a power systems computer aided design/electromagnetic transients including DC (PSCAD/EMTDC) model of the Jeju– Haenam HVDC system in Korea. The simulation results are compared with actual operational data and the PSCAD/EMTDC simulation results for an HVDC system during single-phase and three-phase line-to-ground faults, respectively. These comparisons show that the proposed PSS/E modeling method results in the improved estimation of the dynamic variation in the DC voltage and current in the event of an AC network fault, with significant gains in computational efficiency, making it suitable for real-time analysis of HVDC systems. View Full-Text
Keywords: AC line-to-ground fault; estimation of dynamic variations in DC voltage and current; Jeju–Haenam HVDC system; PSS/E simulation environment AC line-to-ground fault; estimation of dynamic variations in DC voltage and current; Jeju–Haenam HVDC system; PSS/E simulation environment
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Kwon, D.; Kim, Y.; Moon, S.; Kim, C. Modeling of HVDC System to Improve Estimation of Transient DC Current and Voltages for AC Line-to-Ground Fault—An Actual Case Study in Korea. Energies 2017, 10, 1543.

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