The subject of this work is the power system restoration, one of the main problems in the electrical engineering area. Due to the great dependency of electricity of a modern industrial society, this subject has receiving great attention. The restoration of large electrical power systems after the occurrence of serious blackouts is a complex problem where the basic goal is to obtain the system configuration in order to attend loads with different priorities. The restoration is done through stages and in each stage the service is restored to a predetermined set of loads. A method to solve important aspects of the power system restoration problem is presented in this work. The solution takes into account the nonlinear network model (AC model) as well as its constraints and operational limits. The fictitious network concept is extended to the reactive model, linear programming, a new model for the linearized power flow and conventional load flow calculation are used. Results obtained with a test system as well as with a large realistic Brazilian system are presented.
Power System Restoration; linearized power flow; security analysis
