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

Sungchul Hwang, Jaegul Lee and Gilsoo Jang
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Sungchul Hwang: School of Electrical Engineering, Korea University, Anam-ro, Sungbuk-gu, Seoul 02841, Korea
Jaegul Lee: Power Transmission Laboratory, Korea Electric Power Research Institute (KEPRI), Munji-ro, Yuseong-gu, Daejeon 34056, Korea
Gilsoo Jang: School of Electrical Engineering, Korea University, Anam-ro, Sungbuk-gu, Seoul 02841, Korea

Energies, 2016, vol. 9, issue 12, 1-14

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.

Keywords: high-voltage direct current (HVDC); interaction; planning; transient stability (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: 2016
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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