Formulation and Analysis of an Approximate Expression for Voltage Sensitivity in Radial DC Distribution Systems

Ho-Yong Jeong, Jong-Chan Choi, Dong-Jun Won, Seon-Ju Ahn and Seung-il Moon
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Ho-Yong Jeong: Department of Electrical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea
Jong-Chan Choi: Department of Electrical and Computer Engineering, the Ohio State University, 2015 Neil Ave. Columbus, OH 43210, USA
Dong-Jun Won: Department of Electrical Engineering, Inha University, 253 Yonghyun-dong, Nam-gu, Incheon 402-751, Korea
Seon-Ju Ahn: Department of Electrical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Korea
Seung-il Moon: Department of Electrical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea

Energies, 2015, vol. 8, issue 9, 1-24

Abstract: Voltage is an important variable that reflects system conditions in DC distribution systems and affects many characteristics of a system. In a DC distribution system, there is a close relationship between the real power and the voltage magnitude, and this is one of major differences from the characteristics of AC distribution systems. One such relationship is expressed as the voltage sensitivity, and an understanding of voltage sensitivity is very useful to describe DC distribution systems. In this paper, a formulation for a novel approximate expression for the voltage sensitivity in a radial DC distribution system is presented. The approximate expression is derived from the power flow equation with some additional assumptions. The results of approximate expression is compared with an exact calculation, and relations between the voltage sensitivity and electrical quantities are analyzed analytically using both the exact form and the approximate voltage sensitivity equation.

Keywords: DC distribution system; voltage sensitivity; formulation; analytic analysis; approximate expression (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: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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