IDENTIFICATION OF THE BEHAVIOR OF TEMPERATURE MAIN RECTIFIER OF A DIESEL-ELECTRIC LOCOMOTIVE / IDENTIFICAÇÃO DO COMPORTAMENTO DA TEMPERATURA DO RETIFICADOR PRINCIPAL DE UMA LOCOMOTIVA DIESEL-ELÉTRICA
Bernardo Nogueira Neto
DATA DE PUBLICAÇÃO
In this dissertation, we explore the application of the Theory of System Identification to develop a mathematical model that represents the behavior of the electrical current rectifier used to power the traction motors of a locomotive diesel-electric, based on mathematical manipulation of its temperature data. It was developed an ARX model and, using the aid of the computational system identification toolbox of MATLAB , simulations were made for estimation and validation of the order of the model that best describes the dynamic response of the physical system. The input and output data of the rectifier are obtained from the direct measurement of the output current of main generator, which is the input, and from the measurement of the temperature on the rectifier, which corresponds to the output. These data are used in developing the mathematical model of the system under study. The goal is to obtain a model that best represents the behavior of the main engine rectifier, allowing control actions to optimize the relation between supplied and required power of locomotive, so that downtime events resulting from self-protection mechanisms against high temperatures during operation of the rectifier in severe operations are minimized. As a result, we have a more advanced and efficient model that allows a strategy to monitoring the equipment at the various points of operation, considering their variation and ensuring a stable and safety locomotive s operation.
teoria de identificação de sistemas diesel-electric locomotive função de transferência modelagem paramétrica de sistemas dinâmicos locomotiva diesel-elétrica theory of system identification modelo arx sistemas eletricos de potencia retificador de corrente elétrica parametric modeling of dynamic systems arx model transfer function rectifier
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