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Open AccessArticle

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

1
Department of Electrical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea
2
Department of Electrical and Computer Engineering, the Ohio State University, 2015 Neil Ave. Columbus, OH 43210, USA
3
Department of Electrical Engineering, Inha University, 253 Yonghyun-dong, Nam-gu, Incheon 402-751, Korea
4
Department of Electrical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Neville Watson
Energies 2015, 8(9), 9296-9319; https://doi.org/10.3390/en8099296
Received: 15 July 2015 / Revised: 23 August 2015 / Accepted: 24 August 2015 / Published: 28 August 2015
(This article belongs to the Collection Smart Grid)
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. View Full-Text
Keywords: DC distribution system; voltage sensitivity; formulation; analytic analysis; approximate expression DC distribution system; voltage sensitivity; formulation; analytic analysis; approximate expression
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Jeong, H.-Y.; Choi, J.-C.; Won, D.-J.; Ahn, S.-J.; Moon, S.-I. Formulation and Analysis of an Approximate Expression for Voltage Sensitivity in Radial DC Distribution Systems. Energies 2015, 8, 9296-9319.

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