Economic evaluation for EVCS with ancillary service provision capability

In this paper, a generic methodology was proposed to evaluate economic performance of EVCS (electric vehicle charging station) with ancillary service provision capability, considering EV (electric vehicle) arrival/leave distribution, EV battery degradation and compensation subsidy for EV owner. EVCS at office parking site was exemplified for illustrative case study. Ancillary service market data in NYISO (NewYork Independent System Operator) was adopted to generate evaluation results. The results show that ancillary service provision can bring considerable benefits (measured by NPV, net present value) for EVCS owner under acceptable payback even though the capital cost and operation cost may be increased.