Analyses and Comparisons of Generic and User Writing Models of HVDC System Considering Transient DC Current and Voltages

Dohoon Kwon and Youngjin Kim
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Dohoon Kwon: Department of Electrical and Information Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea
Youngjin Kim: Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea

Energies, 2021, vol. 14, issue 23, 1-22

Abstract: Analyses and comparisons of generic models and a novel modeling method of line-commutated converter (LCC)-based high voltage direct current (HVDC) systems are presented for the power system simulator for engineering (PSS/E) simulation tool. The main purposes are to describe the dynamics of the DC voltage and current of HVDC system and to improve estimation of the maximum values using the generic and proposed HVDC models when AC line-to-ground faults are occurred. For the generic HVDC models, the characteristics and limitations as well as parameter investigations are conducted. Three modules are also are developed for the proposed HVDC model, which are composed of (a) AC/DC conversion; (b) controller selection; and (c) DC line model. Case studies were conducted considering the real-operated HVDC system in Korea under the PSS/E and power systems computer aided design (PSCAD) simulation environments. The simulation results were compared with measured data from the real-operated HVDC system and the results from the PSCAD HVDC models considering single- and three-phase line-to-ground faults. The case study results show that a specific generic HVDC model in PSS/E can simulate the dynamics of the DC voltage and current after the AC line-to-ground faults. The case studies also showed that the proposed modeling method is effectively improves the estimation of the maximum DC voltage and current values for the AC line-to-ground faults.

Keywords: AC grid faults; dynamics of DC voltage and current; generic HVDC models; maximum DC voltage and current; modeling of HVDC system; PSS/E (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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