Modelagem e simulação computacional de conversor fonte de tensão (VSC) em back-to-back em uma microrrede inteligente industrial

Abstract

This work presents a case study on the application of a voltage source converter in an industrial microgrid, using multilevel topology in a Back-to-Back arrangement. The main purpose is to understand whether the application of a B2B-VSC converter can be feasible in an industrial microgrid, replacing pyrotechnic short-circuit limiters, indicating the advantages and disadvantages in a technical analysis. The microgrid, characterized by the presence of synchronous generators, substantial loads, and large transformers, faces significant challenges related to the high level of short-circuit. In this context, engineering criteria are presented to assess the thermal and dynamic sustainability of medium-voltage panels and circuit breakers, whose replacement represents not only a considerable economic cost but also impacts on the availability of the production process. The main proposal includes the development of a detailed mathematical model for the multilevel Back-to-Back converter, its implementation in the ATPDraw program, and the simplified modeling of a pyrotechnic short-circuit limiter. The results indicate that, although the pyrotechnic limiter operates satisfactorily, the search for alternatives is justified due to cost and replacement time implications. The Back-to-Back converter emerges as an innovative solution, and the case study reveals promising results in terms of short-circuit limitation.