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Journal of Applied Mathematics
Volume 2014, Article ID 136726, 9 pages
http://dx.doi.org/10.1155/2014/136726
Research Article

Impact of DG Configuration on Maximum Use of Load Supply Capability in Distribution Power Systems

1Key Laboratory of Smart Grid, Tianjin University, Ministry of Education, Tianjin 300072, China
2China Electric Power Research Institute, Beijing 100192, China

Received 23 January 2014; Revised 29 April 2014; Accepted 12 May 2014; Published 27 May 2014

Academic Editor: Hongjie Jia

Copyright © 2014 Hong Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Traditional distributed generators (DGs) planning methods take network loss minimization as the main objective to optimize DG sites in feeders. The use of load supply capability (LSC) in DG planning will precisely answer the questions how many DGs should be integrated, which transformer they should be connected to, and which type of DGs should be adopted. The main work of this paper is to analyze the impact of DGs on LSC so as to answer the three key questions. It resolves the planning problem through three steps: (i) two LSC models considering DGs’ access are developed, in which two different transfer strategies are considered: direct load transfer and indirect load transfer; (ii) the method of combined simple method and point estimate method is proposed. At last, based on a base case, when the configuration of DGs is changing, the impact of DGs on system LSC is studied. After the case study, the conclusion concerning the impact of load transfer strategy, DG capacities, and DG types on LSC is reached.