Performance analysis of vehicle-to-building system with smart-microgrid for energy backup in academic building
Koko Friansa, Justin Pradipta, Irsyad Nashirul Haq, Reza Fauzi Iskandar, Edi Leksono

Institut Teknologi Bandung

Abstract

This paper we design and performance simulation a vehicle-to-building (V2B) system for back-up energy in an academic building. V2B is a concept that EV as an energy storage system that discharging the EV battery when the buildings need power supply. V2B system also connected to grid and micro-grid such as PV array, BESS, and smart inverter to manage charge and dis-charge process for academic building load. The academic building load is a critical load that the electricity must be available for academic services. The load consists of lamps, computers, server, and air conditioning. Performance analysis of the system include battery autonomy time (BAT) and cost of energy (CoE) and using PVSyst and HOMER Grid Software for simulation.
From the simulation results, BESS obtained using VRLA battery has BAT range in 1 hour 50 minutes to 3 hours 50 minutes. Then for V2B with lithium-ion battery obtained BAT range in 3 hours 50 minutes to 6 hours 30 minutes. This range is obtained by entering the maximum or minimum load amount of the load profile for one year. From the economic aspect, COE was obtained at Rp1,433/kWh for BESS using VRLA batteries, and Rp1,907/kWh for V2B using LGChem RESU lithium-ion batteries, respectively.

Keywords: Building energy management, V2B, BESS, CoE, BAT

Topic: EV System and Integration