Analysis of Electricity Price in Danish Competitive Electricity Market

The Danish power system is currently the grid area in the world that has the largest share of wind power in its generation profiles, with around 20% of its annual consumption generated by wind turbines. In this paper, the Danish power system, which may represent the future of competitive electricity markets in some ways, is chosen as the studied power system. 10 year actual data from the Danish competitive electricity market are collected and analyzed. The relationship among the electricity price (both the spot price and the regulation price), the consumption and the wind power generation in an electricity market is investigated in this paper. The spot price and the regulation price generally decrease when the wind power penetration in the power system increases or the consumption of the power system decreases. The statistical characteristics of the spot price and the regulation price for different consumption periods and wind power penetration are analyzed. Simulation results show that the findings of this paper are useful for wind power generation companies to make the optimal bidding strategy so that the imbalance cost of trading wind power on the electricity market could be reduced.