Black-start and restoration of a part of the Italian HV network: modelling and simulation of a field test

ENEL (Italian Electricity Board) planned a set of operator guidelines for the restoration of parts of their national grid starting from selected hydroelectric power plants and progressively reaching thermal power generating units. In order to improve hydrothermal power system restoration reliability, ENEL periodically executes field tests taking advantage of the maintenance outages of the thermal groups. The paper concerns the modelling and simulation of an experimental test performed on the Italian W network near the French border. The study makes use of a stability code provided with user defined model facilities, enabling an accurate description of loads and regulation equipment during the restoration process.