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HVDC-System-Interaction Assessment through Line-Flow Change-Distribution Factor and Transient-Stability Analysis at Planning Stage

Authors
Hwang, SungchulLee, JaegulJang, Gilsoo
Issue Date
12월-2016
Publisher
MDPI AG
Keywords
high-voltage direct current (HVDC); interaction; planning; transient stability
Citation
ENERGIES, v.9, no.12
Indexed
SCIE
SCOPUS
Journal Title
ENERGIES
Volume
9
Number
12
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/86785
DOI
10.3390/en9121068
ISSN
1996-1073
Abstract
Many of the recent projects for new transmission line have considered the high-voltage direct current (HVDC) system, owing to the many advantages of the direct current (DC) system. The most noteworthy advantage is that a cable can serve as a substitute for the overhead transmission line in residential areas; therefore, the HVDC system application is increasing, and as the number of DC systems in the power system increases, the interaction assessment regarding the HVDC system gains importance. An index named multi-infeed interaction factor (MIIF) is commonly used to estimate the interaction between power converters; however, the HVDC system is composed of two converters and a transmission line. The MIIF represents the interaction between the rectifiers and inverters, but not for the whole system. In this work, a method to assess the interaction of the whole system was therefore studied. To decide on the location of the new HVDC transmission system at the planning stage, in consideration of the interaction of the existing DC system, the line flow change distribution factor, according to the HVDC-transmission capacity change, was examined. Also, a power system transient -stability analysis was performed with different HVDC system locations, depending on the distribution factor. The simulation results indicate that when the factor is higher, two HVDC systems have a stronger interaction and are less stable in the transient state.
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공과대학 (전기전자공학부)
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