Investigation of the Dynamic Behaviour of Hydro Power Plants for Restoration Scenarios

With the deregulation of the European Interconnected Network, a reduction of the system stability and reliability has to be expected. Therefore, the realization possibilities of existing network restoration plans have to be investigated more in detail. The most important elements in a real restoration procedure are the power plants, and especially the hydro power plants if existing and reliable. Therefore, in this contribution, the development of a reality oriented simulation model of the hydro power plant 'Airolo' in the Swiss Alps for power system restoration studies is presented in detail. The francis type power plant belongs to the ATEL Company and is located in the canton Tessin. Islanding tests were performed to record the measurement of the transients. Then with parameter identification, a comprehensive model was developed. Comparisons of the measurements and the simulation results show the high quality of the developed power plant model for all time scales necessary for restoration studies.