AN OPTIMIZATION ALGORITHM TO IMPROVE SECURITY OF ELECTRICAL ENERGY SYSTEMS: An hybrid approach based on Linear Programming and Load Flow Calculations

摘要

Power system restoration is one of the main problems in the electrical engineering area, due to the improving dependency of electricity of the modern industrial society. 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 supply 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 the basic problem in a real power system restoration process is presented in this work. The solution takes into account the nonlinear electric 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 also used. Results obtained with a test system and with a large realistic system are presented.