Strategy for optimal grid planning and system evaluation of networked distribution systems

Junwoo Lee, Myungseok Yoon, Wookyu Chae, Woohyun Kim, Sungyun Choi

Research output: Contribution to journalArticlepeer-review

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).

Original languageEnglish
Article number304
JournalSustainability (Switzerland)
Volume14
Issue number1
DOIs
Publication statusPublished - 2022 Jan 1

Keywords

  • Fault current level
  • Line overload
  • Load imbalance
  • Meshed network
  • Networked distribution system (NDS)
  • Temporary overvoltage (TOV)

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Renewable Energy, Sustainability and the Environment
  • Environmental Science (miscellaneous)
  • Energy Engineering and Power Technology
  • Management, Monitoring, Policy and Law

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