Uma contribuição à automação de ensaios em transformadores de potência em média tensão

Abstract

With the increasing expansion of the distribution transformers market in the last years in Brazil and considering the implementation necessity of ISO 9001 (International Organization for Standardization), by the majority of transformer’s manufacturers, which establish minimum standard of quality in the manufactured products, a large of manufacturers and refurbish companies need to adapt and automate its tests in order to document and standarize them. Is in this context that is inserted this work: “A contribution to the automation of tests in medium voltage power transformers”. The techniques and methods of the proposed automation are explored in practice through the project and implementation of MONITEK9443, MONITEK9610 and MONITEK9920 equipments and by the development of the computational programs: TRANS4, RTMED, RHMED, ELEVA and SATURA, which permit working together, realize tests in no-load conditions and in short circuit, as well, transformer turn ratio and ohmic resistance measurements, report emissions, statistical analysis, disagreement history register, saturation curves obtainment, elevation temperature determination and frequency correction method for 50[Hz]. Nowadays in Brazil there are more than 50 companies in distribution transformers area, using these developed programs and instruments, including electricity distribution companies, such as ENERGIPE, ENERSUL, CEMAT, CFLCL, CELPE, CELG and CEMIG. With this work is expected to contribute effectively to the standardization, automation and production increase, with respect to the realization of routine tests.