Journal of the Korea Society of Computer and Information (한국컴퓨터정보학회논문지)

Korean Society of Computer Information (한국컴퓨터정보학회)
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Real-time Optimal Operation Planning of Isolated Microgrid Considering SOC balance of ESS

  • Lee, Yoon Cheol (Dept. of Electrical and Electronic Engineering, Pusan National University) ;
  • Shim, Ji Yeon (Unique Network Co, Ltd.) ;
  • Kim, Jeongmin (Dept. of Electrical and Electronic Engineering, Pusan National University) ;
  • Ryu, Kwang Ryel (Dept. of Electrical and Electronic Engineering, Pusan National University)
  • Received : 2018.08.27
  • Accepted : 2018.10.11
  • Published : 2018.10.31
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Abstract

The operating system for an isolated microgrid, which is completely disconnected from the central power system, aims at preventing blackouts and minimizing power generation costs of diesel generators through efficient operation of the energy storage system (ESS) that stores energy produced by renewable energy generators and diesel generators. In this paper, we predict the amount of renewable energy generation using the weather forecast and build an optimal diesel power generation plan using a genetic algorithm. In order to avoid inefficiency due to inaccurate prediction of renewable energy generation, our search algorithm imposes penalty on candidate diesel power generation plans that fail to maintain the SOC (state of charge) of ESS at an appropriate level. Simulation experiments show that our optimization method for maintaining an appropriate SOC balance can prevent the blackout better when compared with the previous method.

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References

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