Control Strategy for Line Overload and Short Circuit Current of Networked Distribution Systems
- Authors
- Lee, Junwoo; Chae, Wookyu; Kim, Woohyun; Choi, Sungyun
- Issue Date
- 4월-2022
- Publisher
- MDPI
- Keywords
- meshed network; radial distribution system (RDS); networked distribution system (NDS); series reactor; utilization rate; feeder imbalance; short circuit current
- Citation
- SUSTAINABILITY, v.14, no.7
- Indexed
- SCIE
SSCI
SCOPUS
- Journal Title
- SUSTAINABILITY
- Volume
- 14
- Number
- 7
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/140434
- DOI
- 10.3390/su14074208
- ISSN
- 2071-1050
- Abstract
- The expected increase in renewable energy sources (RESs) and electric vehicles (EVs) connected to distribution systems will result in many technical constraints. A meshed network is a promising solution; however, some remarkable challenges must be overcome. Among these, this paper mainly focuses on the line overload and short circuit current of a networked distribution system (NDS) in Korea, an advanced form of meshed network. An NDS refers to a system in which there exists permanent linkages between four feeders and N x N communication-based protection. We propose a method, which employs the tap changing control algorithm of the series reactor to control line overload and short circuit current. MATLAB/Simulink was used to evaluate the proposed method. Three different types of distribution system were employed. First, the utilization rate and feeder imbalance were analyzed in steady-state condition. Subsequently, the short circuit current was analyzed in short circuit condition. The results revealed that the proposed method can effectively prevent line overload in up to 82.7% of cases, enhance the utilization rate by up to 79.9%, and relieve the short circuit current; that is, it can contribute to system stability and the economic operation of an NDS.
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