Dimensionering av krisberedskap för elbilsladdning : en simuleringsstudie om krisberedskap för samhällsviktiga funktioner

Abstract: With the rising number of electric vehicles in the Swedish vehicle fleet in combination with the rising electricity demand in the country, it begs the question. How should the electricity demand from charging of electric vehicles for vital societal functions be managed in a time of crisis without the support from the electric grid? This study focuses on the task of dimensioning reserve power systems for electric vehicle (EV) charging of parking spaces with 10, 20 and 30 cars. The results showed that in one case without support from the grid, a stationary internal combustion engine (ICE) with the electrical power of 110 kW in combination with a fuel storage system was enough to supply the system with sufficient electrical power, to charge a fleet of 30 cars for one week. In another case (the benchmark case) where the reserve power systems also were designed for everyday use outside a crisis with grid connection and renewable power generation, several components were added. A battery storage system in combination with solar and wind power systems for energy generation and storage for later use were designed as compliment to the ICE. The results showed that the system made significant energy savings when simulated in summer conditions approximately 500 kg of upgraded biogas compared to the benchmark case which were simulated in winter conditions. The benchmark case performed very similar to the case with only an ICE in winter conditions because the production of solar power was very small.