Research on Unit Commitment Considering Interaction Between Battery Swapping Station and Power Grid

Abstract

Large-scale integration of battery swapping station(BSS) into power system would bring extensive impacts on power system operation.In this paper,BSS of electric vehicles(EV) was taken account into basic unit commitment,thus a new unit commitment model considering BSS with charging/discharging was proposed for the first time.Based on the research on physical process of battery replacement,the objective was developed with production cost and startup cost of thermal generations,variance function of total load with BSS charging/discharging power.Also it subjected to many constraints including power balance with charging/discharging efficiency,energy storage limits and the minimum storage energy for battery replacement demand.Through the optimization of unit commitment(UC) considering interaction between BSS and power grid,the operation cost of power system is reduced a lot.Furthermore,variance optimization in objective improves the adjustment of unit output efficiently.Finally,the effectiveness and validity of proposed model are illustrated by 10-unit system.