Tesis
Comparação de funções objetivo para seleção de PSS pelo amortecimento de oscilações em sistemas multimáquinas
Fecha
2015-12-15Registro en:
CARBONERA, Luis Felipe Bianchi. Comparison of objective functions to select a PSS to damp
oscillations in multi-machine systems. 2015. 86 f. Dissertação (Mestrado em Engenharia Elétrica) - Universidade Federal de Santa Maria, Santa Maria, 2015.
Autor
Carbonera, Luis Felipe Bianchi
Institución
Resumen
Small disturbances occur continuously in electrical systems mainly due to load and generation
variations. This ends up causing low frequency voltage fluctuations that are usually observed
in systems whose lines have weak connections. In addition to damaging loads connected to
the same bus, they can even damage equipment and incurring in costs to the energy
distributors. Moreover, such oscillations can resonate with the system parameters and cause a
general collapse in energy supplies. In the literature, there are methods for the development of
stabilizers for power systems that are implemented to counteract these perturbations. In this
dissertation, we compared some objective functions and identified points that can be
optimized for parameterization of power system stabilizers IEEE models: PSS2B, PSS4B and
conventional Delta w PSS, by computer simulations. The adjustment methodology used in
this dissertation is based on the genetic algorithm (GA) held in Simulink® with the aid of the
Matlab toolbox Gatool®. The effectiveness of the suggested technique and stabilizers are
checked using simulation results, where it is noticeable that the PSSs managed to dampen
oscillations in almost all cases. The only one who did not realize the optimization was the
Delta W PSS with ITSE objective function in the hydraulic turbine, which failed to dampen
oscillations even for the best results. Moreover, it was also possible to notice that the same
Delta W PSS with ITAE objective function had the best results for the two types of turbine.