Desenvolvimento de um sistema ativo para aterramento do neutro

Abstract

Most of the downtime imposed on electrical systems, be they generation, distribution or consumption (industrial, commercial, residential) is from ground faults for which statistics are in the range of 70 to 90% of all faults. In general, these failures cause electrical system shutdown, shutdown electric sistems generating momentary or lasting power downtime, affecting mainly the industrial and commercial systems which have sensitive electronic equipment installed. Besides the downtime an extremely important effect of the ground fault is related to human and animal threatened by step potencial and touch developed at the fault point. There are also risks of fires caused by ground faults and all these phenomena are directly related to the neutral grounding method of the electrical system, consequently its importance in maintaining the electricity supply quality , people safety and equipment performance. This project aims to develop a theoretical study on electronic converters implementation for the Petersen coil control operating in the neutral grounding of electrical systems. Such application seeks to virtually eliminate the ground fault currents, what makes possible to maintain operational continuity. Essencially addresses the possibilities of this application and describes the main issues related to their use and development aspects. In this sense, exhibits a broad theoretical application of the coil, as well as understanding the general concepts related to their use. In this study are done methodologies for the coil tuning, addressing the difficulties, advantages and disadvantages and the definition of a strategy to be used in the application of static converters in order to achieve the tuning. new prospects for the future development of safer conditions and significant operational improvements in electrical systems.