Enhancing line capacity utilization in power transmission system using active MVDC Link

Changhee Han, Sungyoon Song, Juyong Kim, Gilsoo Jang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

As a proportion of generation using renewable energy increases in a power system, the need for facility investment is increasing in not only the distribution system but also the transmission system. However, it is ineffcient to invest in new equipment to deal with the short peak output of renewable energy generation. For this reason, this paper proposes a method for operating the grid more flexibly, through an optimal operating strategy of the direct current (DC) line at medium-voltage (MV) level, thereby delaying the facility investment in the transmission line. In order to determine the optimal operating point of the converter connected with a DC line, the swarm intelligence-based optimization technique, which can minimize multi-objective function, is used. In addition, in order to overcome the communication dependency of the centralized control, which needs to receive information about the optimal operating point computed by the system operator, this paper proposes a decentralized emergency control (DEC) method in case of a communication fault.

Original languageEnglish
Article number1589
JournalEnergies
Volume12
Issue number9
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • Medium voltage direct current
  • Multi-objective optimization
  • Operation strategy
  • Voltage source converter

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering

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