Resumo:
It is known that electric power systems are submitted to frequent changes of
state, as for instance, in load variations, commutations of generators or
transmission lines, inclusion of new equipments, contingencies, etc. These
changes should be compensated in a way to maintain the electric systems
operating properly with certain specified dynamic. The development of new areas
of the control theory, as well as of new technologies, allows new compensation
methodologies can be applied to electric power systems, aiming at obtainment of
stabler behaviors and improvements in the efficiency of these systems.
This work proposes the utilization of a fuzzy controller that introduces
characteristics of phase lead or lag applied to a power systems stabilizer. The
objective is to obtain a better acting in front to the conventional systems of
compensation.
Seeking to obtain practical results, besides mathematical models and
numeric simulations, experiments will be also elaborated using a laboratory bench
that will act (in reduced scale) the real systems found in the practice.
The obtained results demonstrate the potential front to real disturbances in
an electric system. The fuzzy compensation process proposed possesses great
flexibility in what refers to simulations and real tests.
The practical experiments shown in the work seek to compare and to
validate the proposed method. The new fuzzy stabilizer is a viable alternative that
improves the dynamic acting of the damping system, with positive effects for the
stability of the process in subject.
