Development of Reality Oriented Simulation Models of Power Plants and Power Systems for Restoration Studies

Abstract

Abstract With the unbundling, deregulation and liberalisation of the European Interconnected Network a reduction of the security and stability limits of the electrical power system has to be expected. In this context the availability of reality oriented simulation models of power plants and power systems becomes more and more important. These models are necessary both for pre-fault-scenarios concerning the estimation of stability and security limits in normal operation and for post-fault-scenarios concerning the reconstruction process after blackouts. In this paper, the development of reality oriented simulation model of a high pressure hydro power plant in the Swiss Alps will be presented. Today this power plant is a very important one in the reconstruction plan of the Swiss grid. In this contribution all development steps such as modelling, measurements, identification and verification will be depicted explicitly. As result of the investigations it can be shown that even comparatively simple simulation models can guarantee a very good dynamic behaviour compared with the real power plant, and this for the whole working range from zero to full power production.