Method for controlling frequency of stand-alone microgrid and power converter for energy storage device for controlling same
AssigneeKorea Electric Power Corporation
InventorsWoo-Kyu Chae, Hak-Ju Lee, Jung-Sung Park, Jong-Nam Weon, Jun-Bo Sim
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for controlling the frequency of a stand-alone microgrid wherein an energy storage device of the stand-alone microgrid is operated as a main power source by controlling a battery power conditioning system (PCS) of the stand-alone microgrid in a constant voltage constant frequency (CVCF) mode. According to the present invention, it is possible to operate the frequency stably while considering the fuel cost and power generation efficiency of a stand-alone microgrid.
Claims6
A method of controlling frequency of a stand-alone microgrid,
- wherein a charging/discharging amount of an energy storage device is received through a control means formed in a battery power conditioning system (PCS) of the stand-alone microgrid, and frequency of the microgrid system is controlled in accordance with the received charging/discharging amount of the energy storage device, thereby operating the energy storage device as a main power source of the stand-alone microgrid, and
- wherein frequency of the battery PCS is controlled by deriving an equivalent stiffness of the entire microgrid system according to an input of the charging/discharging amount of the energy storage device.
A power conditioning system (PCS) for an energy storage device of a stand-alone microgrid,
- wherein an energy storage device of the stand-alone microgrid is operated as a main power source by controlling a battery PCS of the stand-alone microgrid in a constant voltage constant frequency (CVCF) mode, and
- wherein frequency of the battery PCS is controlled by deriving an equivalent stiffness of the entire microgrid system according to an input of the charging/discharging amount of the energy storage device.
Dependencies are inferred from the claim text.