Desenvolvimento no atpdraw de um modelo de cálculo de fator k, fator de perda harmônica e desclassificação de transformadores

Abstract

The growing presence of nonlinear loads in electrical systems has intensified harmonic distortion levels, demanding special attention to the sizing and operation of transformers. This work proposes the development of a computational model in the ATPDraw environment, using the MODELS language, with the objective of calculating the K-Factor, the Harmonic Loss Factor (FHL), and the thermal derating of transformers according to IEEE C57.110 (2018) standard guidelines. The model was developed by adapting the native ATPDraw Harmonics block, which is responsible for performing the Discrete Fourier Transform (DFT) of the simulated current signals. From the obtained harmonic modules, the algorithm implements the normative equations for calculating the desired indices. It is expected that the obtained results will aid in the analysis of transformers under distorted load conditions, promoting greater accuracy in thermal sizing and contributing to the reliability and lifespan of the equipment. The model also proves to be an efficient didactic tool for application in academic and professional environments.