Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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Coordinated State-of-Charge Control Strategy for Microgrid during Islanded Operation

  • Kim, Jong-Yul (Smart Distribution Research Center, Korea Electrotechnology Research Institute (KERI)) ;
  • Jeon, Jin-Hong (Smart Distribution Research Center, Korea Electrotechnology Research Institute (KERI)) ;
  • Kim, Seul-Ki (Smart Distribution Research Center, Korea Electrotechnology Research Institute (KERI))
  • Received : 2011.11.25
  • Accepted : 2012.08.28
  • Published : 2012.11.01
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Abstract

In this paper, a coordinated state-of-charge (SOC) control strategy for the energy storage system (ESS) operating under microgrid islanded mode to stabilize the frequency and voltage was proposed. The proposed SOC control loop is made up of PI controller, which uses a SOC state of the energy storage system as an input and an auxiliary reference value of secondary control as an output. The SOC controller changes the auxiliary reference value of secondary control to charge or discharge the ESS. To verify the proposed control strategy, PSCAD/EMTDC simulation study was performed. The simulation results show that the SOC of the ESS can be regulated at the desired operating range without degrading the stabilizing control performance by proposed coordinated SOC control method.

Keywords

References

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