Análise das inspeções de três linhas de transmissão 500 KVca: um estudo de caso com foco em custos de manutenção e perda de receita

Abstract

With the population growth increase of the consumer market of electric energy the Electric System of Power (SEP) has a tendency to increase and looks to accompany the constant technological evolutions, looking for supply of electric energy with excellent functioning, quality and, consequently, with less interruptions for the consumers. The SEP is formed by factories creators, substations, system of transmission and system of distribution. Being that each sector has different functions and quite specific technical characteristics me they turned to the appropriate supply of electric energy to the consumers. The National Agency of Electric Energy (ANEEL) established, in his technical Note 181/2014, the rules for definition of the quality in the supply of the electric energy proposing fine for the dealerships how, for example, I deduct in the Annual Permitted Income (RAP) or up to the loss of the concession. The factors that prevent the dealerships from guaranteeing the supply of energy with the wanted quality are the faults or natural internal defects (breaks, end of useful life) and day-pupils (rains, storms, vandalism) who tease in separation or cut of supply, by this motive inspections and maintenances of frequent form must be carried out and what could detect problems in the equipments before even of they change into faults or defects. The separations planned by the dealerships to correct incipient defects must not be troubled like the not planned separations, stimulating in this way the maintenance of the system. The Line of Transmission (LT) is the set of elements used to transmit electric energy and to favor his distribution in the cities. To maintain these lines of transmission in perfect state implicates the realization of maintenances with sufficient periodicity to avoid elevated costs and losses of originating receipts. This work had the objective to analyses the costs of inspection and of maintenance in three LT of 500kVCA installed in the western region of the Paraná, pertaining the COPEL Transmission S/A, whose maintenances are planned in two different manners - periodicity defined by criteria as the level of tension and the life of the (LT) or like note of Visual Inspections (IV). With the presented data it was possible to detect the number of maintenances predictive and preventive when studied LT and his collected costs carried out in each one of the three. Besides analyzing the losses of receipts caused in the presented period and simulating new losses finding separations planned how not planned. The fulfilled analyses showed that more than 99 % of the cost of a not planned maintenance can be attributed to the discount of the RAP being that two separations of this nature are sufficient to pay the costs of people and inputs of all the inspections and maintenances predictive carried out in the period of 20 years.