Browse > Article
http://dx.doi.org/10.5370/KIEE.2011.60.9.1674

A Feasibility Study on DC Microgrids Considering Energy Efficiency  

Yu, Cheol-Hee (국민대학교 전자공학부)
Chung, Il-Yop (국민대학교 전자공학부)
Hong, Sung-Soo (국민대학교 전자공학부)
Chae, Woo-Kyu (한전 전력연구원)
Kim, Ju-Yong (한전 전력연구원)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.60, no.9, 2011 , pp. 1674-1683 More about this Journal
Abstract
More than 80% of electric loads need DC electricity rather than AC at the moment. If DC power could be supplied directly to the terminal loads, power conversion stages including rectifiers, converters, and power adapters can be reduced or simplified. Therefore, DC microgrids may be able to improve energy efficiency of power distribution systems. In addition, DC microgrids can increase the penetration level of renewable energy resources because many renewable energy resources such as solar photovoltaic(PV) generators, fuel cells, and batteries generate electric power in the form of DC power. The integration of the DC generators to AC electric power systems requires the power conversion circuits that may cause additional energy loss. This paper discusses the capability and feasibility of DC microgrids with regard to energy efficiency analysis through detailed dynamic simulation of DC and AC microgrids. The dynamic simulation models of DC and AC microgrids based on the Microgrid Test System in KEPCO Research Institute are described in detail. Through simulation studies on various conditions, this paper compares the energy efficiency and advantages of DC and AC microgrids.
Keywords
DC microgrids; DC distribution system; Energy efficiency; Photovoltaic; Battery; Converter efficiency;
Citations & Related Records

Times Cited By SCOPUS : 2
연도 인용수 순위
  • Reference
1 H. Pang, E. Lo, and B. Pong, "DC Electrical Distribution Systems in Buildings" ICPESA 2006
2 Y. Ito, Y. Zhongqing, and H. Akagi, "DC Microgrid Based Distribution Power Generation System," IPEMC 2004.
3 M.E. Baran and N.R. Mahajan, "DC distribution for industrial systems: opportunities and challenges," IEEE Trans. on Industry Applications, vol. 39, issue 6, Nov-Dec. 2003, pp. 1596-1601.   DOI   ScienceOn
4 A. Sannino, G. Postiglione, and M.H. Bollen, "Feasibility of a DC Network for Commercial Facilities," IEEE Trans. on Industry Applications, vol. 39, no. 5, Sep-Oct. 2003, pp. 1499-1507.   DOI   ScienceOn
5 이준신, 김경해, 태양전지공학, 그린, 2008
6 P. Savage, R.R. Nordhaus, and S.P. Jamieson, "DC Microgrids: Benefits and Barriers,"From Silos to Systems: Issues in Clean Energy and Climate Change, 2010.
7 I. Chung, W. Liu, D. Cartes, E. Collins, and S. Moon "Control Methods for Multiple Distributed Generators in a Microgrid System," IEEE Trans. Industry Applications. Vol.46, no.3, May/June 2010.
8 Y. Ji, J. Kim, S. Park, J. Kim, and C. Won, "C-language based PV array simulation technique considering effects of partial shading," IEEE International Conference on Industrial Technology 2009, Feb. 2009.
9 F. Katiraei, M.R. Iravani, "Power management strategies for a Microgrid with multiple distributed generation units," IEEE Trans. Power Systems, vol. 21, no. 4, pp.1821-1831, Nov. 2006.   DOI   ScienceOn
10 N. Hatziargyriou, H. Asano, R. Iravani, and C. Marnay, "Microgrids," IEEE power & energy magazine, pp.78-94, Jul./Aug. 2007.
11 N. Rasmussen, and J. Spitaels, "A Quantitative Comparison of High Efficiency AC vs. DC Power Distribution for Data Centers," White Paper 127, APC by Schneider Electric.
12 R.H. Lasseter, "Control and Design of Microgrid Components," PSERC Final Report, Jan. 2007.
13 M. Starke, L.M. Tolbert, B. Ozpineci, "AC vs. DC Distribution: A Loss Comparison" IEEE T&D 2008
14 H. Kakigano, M. Nomura, and T. Ise, "Loss Evaluation of DC Distribution for Residential Houses Compared with AC System," IEEE IPEC 2010