Análise das metodologias de estudo de partida de motores de grande porte em sistemas elétricos isolados

Abstract

This dissertation presents a comparative analysis between the two main methodologies used to carry out the studies of motor starting, the Ąrst called the static method (snap shot), in the frequency domain, and the second, called the dynamic method (The Speed Torque and acceleration-Time), in the time domain, using as a case study a typical offshore platform composed of generators and large induction motors. For this, the software Power Tools for Windows (PTW) and the real-time digital simulator (RTDS) were used to per form the analysis of the two methodologies. From the results of the case study, the main advantages and disadvantages of each one are pointed out, as well as the differences in the requirements associated with the parameters of the electrical system equipment nec essary to apply each methodology. The simulation results showed that the study of motor starting in the time domain provides more complete information than the static one, even more for this type of system in particular. This work reveals the need for the selection criteria between the two methodologies to be deĄned in the IEEE 3002.7-2018 standard and for isolated systems it is highly recommended to perform a time domain analysis.