Strategy for Optimal Grid Planning and System Evaluation of Networked Distribution Systems

Junwoo Lee, Myungseok Yoon, Wookyu Chae, Woohyun Kim and Sungyun Choi
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Junwoo Lee: School of Electrical Engineering, Korea University, Seoul 02841, Korea
Myungseok Yoon: School of Electrical Engineering, Korea University, Seoul 02841, Korea
Wookyu Chae: Smart Power Distribution Laboratory, Distribution Planning Group, KEPCO Research Institute, Daejeon 34056, Korea
Woohyun Kim: Smart Power Distribution Laboratory, Distribution Planning Group, KEPCO Research Institute, Daejeon 34056, Korea
Sungyun Choi: School of Electrical Engineering, Korea University, Seoul 02841, Korea

Sustainability, 2021, vol. 14, issue 1, 1-18

Abstract: The meshed network may become a standard for future distribution systems owing to its various benefits regarding voltage profile, reliability, losses, and the distributed generation (DG). Therefore, in Korea, there is a plan to introduce an advanced form of meshed network called a networked distribution system (NDS). This refers to a system with permanent linkages between four distribution lines (DLs) and N × N communication-based protection. To properly introduce NDS to an actual grid, this study proposes a strategy for optimal grid planning and system evaluation. Four different topologies and four practical indicators are explained. First, load imbalance is used to find the optimal grid that maximizes the load capacity. Second, line overload, fault current, and temporary overvoltage (TOV) were used to evaluate the necessity of load transfer, availability of circuit breakers, relay settings, and system stability. PSCAD/EMTDC were employed for the simulation. This study establishes the construction and evaluation guidelines of NDS for distribution system operators (DSOs).

Keywords: meshed network; networked distribution system (NDS); load imbalance; line overload; fault current level; temporary overvoltage (TOV) (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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