ACHIEVING ZERO-EMISSION CITY UTILIZING PV, EV AND BATTERY WITH CHARGING AND DISCHARGING CONTROL

Abstract

To achieve carbon neutrality by 2050, electric vehicles (EVs) and renewable energy should be promoted. This study investigated the possibility of zero-emission city in Tsukuba City in Ibaraki Prefecture by introducing a large amount of photovoltaics (PVs) as power source, and controlling of charging and discharging of EVs. As a result, we found that the cost became twice as compared with current grid system if all energy was supplied by PV generation only; therefore, the way of reducing the cost is important for achieving zero-emission city. We also found that it was possible to keep the similar level of the cost by allowing the purchase of the carbon neutral grid power. In addition, the result indicated that lowering PV installation and power purchasing cost reductions were important to achieve zero-emission city.