THE BORNHOLM POWER SYSTEM An overview

The Bornholm power system is a Danish distribution system located on the island Bornholm situated just south of Sweden. ØSTKRAFT is the distribution system operator supplying electricity to more than 28,000 customers at Bornholm. The peak load was 56 MW in 2007. The Bornholm power system is part of the Nordic interconnected power system and power market, and it has many of the characteristics of a typical Danish distribution system. With respect to area, electricity demand and population Bornholm corresponds to approx. 1% of Denmark. The wind power penetration in 2007 was more than 30%, and the system can be operated isolated in islanding mode. The Bornholm power system therefore is a unique facility for experiments with new SmartGrids technologies, and it is part of the experimental platform for power and energy, PowerLabDK. The key figures of the Bornholm distribution system is given in this paper. Figure 1. The island of Bornholm with major generation units and 60 kV grid. Total area is 588.5 km.