Santiago Lajes Choy

Considerations about the maintenance in electrical networks

The technological development experienced by industrialized countries has brought about a huge increase of demand of electric power. As a result, the utilities in charge of electric power transmission and distribution have noticed that the overhead lines are reaching critical values in different parameters, for this reason the maintenance is very important. In order to tackle this issue, we have undertaken a proposal for the good selection of the system maintenance in electrical networks. It carried out a comparative analysis, among the systems for corrective, preventive maintenance and predictive, being determined the rational areas use of each one of them, in function of the fault level of the network, using as function object the Net Present Value. Actually the results of this work are used in different enterprises as a methodology.

Determinación de la confiabilidad en interruptores de potencia: caso de estudio

espanolEn este trabajo se describen algunos metodos para el analisis de la confiabilidad, tales como la tasa de falla instantanea, la razon promedio de fallas, herramientas estadisticas y otras tecnicas usadas para mejorar la vida util de equipos y componentes. A partir de estas consideraciones se analizan los interruptores de potencia instalados en una subestacion para determinar su confiabilidad e identificar los elementos con mayor incidencia y el comportamiento de falla basado en una distribucion Weibull, lo cual permite predecir las posibles fallas de dichos elementos. EnglishThis work describes some methods for the reliability analysis, such as the instantaneous failure rate, the average failure rate, statistical tools and other techniques that are used to improve the lifetime of equipment and components. The high voltage breakers installed in a substation are analyzed according to these considerations to determine their reliability and to identify the elements with high probability of failure and the fault behavior, based on Weibull distribution, that enable the possibility to predict future faults is also analyzed.

Evaluación de la confiabilidad en interruptores de potencia mediante la norma Norsok Z-013

Circuit breakers serve to connect and disconnect electric circuits under any operation conditions. Improving circuit breaker reliability is important for the...

Utilización de la lógica difusa en la gestión del mantenimiento: caso de estudio

In this paper, we approach the thematic of maintenance in high voltage breaker from another totally different optics by means of the use of fuzzy logic to make an appropriate decision; we make reference to the different rules used in the fuzzy logic as well as its memberships, inference process and the methods for the defuzzification. Finally the methodology is implemented based on Fuzzy Logic to different high voltage breakers.