Title :
Coordinated state-of-charge control strategy for microgrid during islanded operation
Author :
Kim, Jong-Yul ; Kim, Seul-Ki ; Jeon, Jin-Hong
Author_Institution :
Smart Distrib. Res. Center, Korea Electrotechnol. Res. Inst., Seongnam, South Korea
Abstract :
In this paper, a coordinated state-of-charge (SOC) control strategy for the energy storage system operating under microgrid islanded mode to stabilize the frequency and voltage was proposed. The proposed SOC control loop makes up of PI controller, which uses a SOC state of the energy storage system (ESS) 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 desired operating range without degrading of stabilizing control performance by proposed coordinated SOC control method.
Keywords :
distributed power generation; energy storage; frequency stability; power generation control; power system stability; ESS; PI controller; PSCAD-EMTDC simulation study; SOC control loop; SOC control strategy; auxiliary reference value; coordinated state-of-charge control strategy; energy storage system; frequency stability; microgrid islanded mode; voltage stability; Distributed power generation; Energy storage; Frequency control; Generators; Load modeling; System-on-a-chip; Voltage control; Coordinated Control; Energy Storage System(ESS); Islanded Operation; Microgrid; State-of-charge(SOC);
Conference_Titel :
Power Electronics for Distributed Generation Systems (PEDG), 2012 3rd IEEE International Symposium on
Conference_Location :
Aalborg
Print_ISBN :
978-1-4673-2021-4
Electronic_ISBN :
978-1-4673-2022-1
DOI :
10.1109/PEDG.2012.6253991