-This paper presents a methodology to determine an optimal operation schedule of a battery energy storage system (BESS) considering dynamic charging/discharging efficiencies considering the output power levels. A novel optimization problem is formulated based on the mixed integer linear programming (MILP) addressing a non-linear charging/discharging efficiency function by a stair-wise linear model. Technical constraints of BESS are also included in the MILP formulation. Test simulation results of BESS operation for the two Korean power systems show the effectiveness of the dynamic efficiency scheduling model compared to the conventional average efficiency ones.

No abstract

No abstract

No abstract

-In recent years, energy supply cases to take advantage of EMS(Energy Management System) are increasing according to high interest of energy efficiency. The important factor for essential and economical EMS operation is the supply and demand plan the hourly power demand of building load using the hierarchical clustering method of variety statistical techniques, and use the real historical data of target load. Also the estimated results of study are obtained the reliability through separate tests of validity.