Abstract of Thesis presented at COPPE/UFRJ as a partial fulfillment of the requirements for the degree of Master of Science (M.Sc.)

Simulation and Evaluation of Out of Step Protection Schemes For Synchronous Generators

Bernardo Rocha Bordeira

September/2011

Advisors:

Sebastião Ércules Melo de Oliveira Alexandre Pinto Alves da Silva

Department:

Eletrical Engineering

      The present study evaluates synchronous generator's out of step main protection schemes from transient stability simulations of an electric power system. The main concepts and equations of power system stability, modeling of out of step protection schemes and system components and the differential equations resolution method are presented.
      To perform the simulations, a MATLAB application was developed, which returns the graphics of the main generator variables of interest (angle, voltage, current, power, etc.) and also the protection schemes response according to the equipment system components, simulation parameters and the faults applied to the system.
      From analysis of the simulation cases, one can conclude that the out of step protection schemes presented are effective and respond correctly, removing the generator from the system in cases of transient instability.