Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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Optimal Power Flow of DC-Grid Based on Improved PSO Algorithm

  • Liu, Xianzheng (Institute of Information Science Technology, Dalian Maritime University) ;
  • Wang, Xingcheng (Institute of Information Science Technology, Dalian Maritime University) ;
  • Wen, Jialiang (State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute)
  • Received : 2016.10.31
  • Accepted : 2017.05.16
  • Published : 2017.07.01
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Abstract

Voltage sourced converter (VSC) based direct-current (DC) grid has the ability to control power flow flexibly and securely, thus it has become one of the most valid approaches in aspect of large-scale renewable power generation, oceanic island power supply and new urban grid construction. To solve the optimal power flow (OPF) problem in DC grid, an adaptive particle swarm optimization (PSO) algorithm based on fuzzy control theory is proposed in this paper, and the optimal operation considering both power loss and voltage quality is realized. Firstly, the fuzzy membership curve is used to transform two objectives into one, the fitness value of latest step is introduced as input of fuzzy controller to adjust the controlling parameters of PSO dynamically. The proposed strategy was applied in solving the power flow issue in six terminals DC grid model, and corresponding results are presented to verify the effectiveness and feasibility of proposed algorithm.

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