AUTHOR=Xiao Jun , Wang Ying , Zu Guoqiang 

TITLE=Analysis of Distributed Generation Accommodation in Flexible Distribution Networks

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 9 - 2021

YEAR=2021

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2021.634770

DOI=10.3389/fenrg.2021.634770

ISSN=2296-598X

ABSTRACT=This paper proposes a method to analyze distributed generation (DG) accommodation in flexible distribution network (FDN). Firstly, the DG-load matching degree is proposed to quantitatively describe the power balance degree of DG and load in a distribution network. Secondly, the accommodation ratio of DG is proposed and divided into DG-load accommodation ratio and DG-network-load accommodation ratio, to distinguish whether the index takes the network operational constraints into account. We derive DG-load accommodation ratio directly from matching degree and proposes the simulation model of sequential production to solve DG-network-load accommodation ratio. Finally, the cases of FDN under the scenarios of different matching degrees are studied and compared with those of traditional rigid distribution network. The results show that the improvement of accommodation ratio by upgrading rigid distribution network to FDN is conditional, which is related to not only the matching degree of whole network, but also that of each local networks. The DG-network-load accommodation ratio will tend to DG-load accommodation ratio if the proper planning or optimization measures are taken. We find that the capacity of branches adjacent to the DG bus mainly limit the DG accommodation in FDN, it is recommended to relocate the DGs and enlarge the capacity of those branches.