19. June 2009
by Maja Felicia Bendtsen
In early summer 2011 the results from earlier work packages will be gathered in a field test on Bornholm. The duration of the test is approximately 6 months, and during the test electric vehicles for different public purposes will be involved. Also vehicles in private companies will participate and if possible even vehicles from local households. The total number of vehicles is not yet established, and although the number of vehicles will not be very large, it will still be sufficient to fully proof that the developed technologies will be one of the solutions when charging of a large percentage of electric vehicles has to be managed.
Management of charging is important for more reasons. One reason is the risk of increasing the early evening peak load if vehicles are simply plugged in and charged as soon as arriving home after work. Another reason is that the battery capacity of the vehicles is a necessary aid for making integration of more wind energy possible without endangering the stability of power supply or having to sell power in the spot market to very low prices.
Bornholm is an island situated in the Baltic Sea. The population and area of Bornholm corresponds to a little less than 1 % of Denmark. Electrically Bornholm is only connected to the mainland power grid through a sea cable to Sweden. This gives a possibility of running in island mode, giving unique possibilities of studying the power grid, including the impact of ex. electric vehicles. Bornholm also has a high share of wind energy in the consumed power; in 2008 the share was approximately 30 %. This makes Bornholm a small model of the expected society of Denmark year 2020, where Denmark is committed to reach an amount of 30 % renewable energy.
