Wind power integration in power systems with bottleneck problems

The number of installed wind power plants continues to increase, but the existing transmission system is usually not dimensioned for large new generation plants. Some measures are necessary to make installation of large-scale wind power possible: grid reinforcement, optimal planning and control of wind power plants and existing conventional power sources. Methods presented in this paper allow us to estimate the amounts of wind power that can be installed in areas with bottleneck problems without grid reinforcement. The first method gives a simplified estimation based on several assumptions; the second is similar to probabilistic production cost simulation. The estimation methods are applicable to discrete variables (measurements) and also generalised for continuous variables with known distribution. The developed methods are applied to the Swedish transmission system.