Sintonización de parámetros de secuencias de un transformador trifásico utilizando métodos de optimización no lineal

Abstract

This technical project focuses on the tuning of the sequence parameters: positive, negative and zero, of a three-phase transformer of 50 (kVA) from measurements of monophasic faults to ground and biphasic faults to ground; with simulated curve adjustments vs. measures that use non-linear optimization methods, using a calculation routine developed in MATLAB-Simulink. Tests were carried out in a didactic three-phase transformer, using international standards to determine the parameters of sequences in the laboratory, in order to obtain first values. Subsequently, short-circuit events were performed and the current curve was extracted with the help of the oscilloscope. The information that results from the measurement is compared with the simulated part, generating two curves that overlap and give certain differences to each other. All of this was done in the same way in the transformer 50 (kVA) with the difference that, when performing the fault events, it must be fed by the high voltage side to 500 (V) due to the physical conditions of the laboratory, where it could not be fed at 6300 (V). In all the methods used, an average square error of less than five was obtained after tuning.