Implementação de um algoritmo para modelagem de carga em função da tensão e da frequência.

Abstract

This work aims to implement a numerical resolution algorithm with good precision criteria to obtain a LOAD MODEL according to voltage and frequency, using the SYSTEM IDENTIFICATION method. The identification method is summarized in obtaining the necessary parameters to compose the system model from the measurements made in the system itself. The input values ​​are frequency and voltage and the output are active and reactive power. Then, the model found is submitted to the same input signal of the system and, according to the tolerance, the model and system or process outputs are compared. When the error of this comparison is minimal, the model found represents the process under study. This work is then based on the possibility of using natural reactions, ie, undesirable variations of voltage and frequency that normally appear in the system are used as stimulus signals. For this it is necessary that a data acquisition system continuously observe the electrical system, to detect and store the variations of the pre-defined quantities, which are used in the identification. And with the identification technique used "off-line", the load model is determined. This work is divided in three phases: the first one has as objective to collect the data to be used and to store them in diskettes; the second process the program with the data measured to make the identification of the constants, and the third phase performs the analysis of the results found.