Since the year 2000, Celeo Redes has been operating on the power transmission industry, and now has 12 Utilities, one of which is under construction, in 11 Brazilian States, totaling more than 3,900 km of 500- and 230-kV transmission lines, and twelve substations with installed capacity of 4,875 MVA.
In the ongoing quest for excellence in maintenance practices and increased reliability, while reducing the transmission system unavailability and maintenance costs, Celeo maintenance engineering seeks to apply state-of-the-art, highly effective tools and technologies. Based on this principle, the implementation of on-line monitoring of the autotransformers and reactors of the group’s concessions started in 2011, and now covers virtually all the assets of these families, totaling 38 devices, in addition to some smaller devices – but important for transmission functions, such as grounding transformers.
This paper introduces the corporate system solution adopted to achieve this goal, making use of the corporate Information Technology structure to ensure the proper system maintenance, thus ensuring its continuity, with excellent outcomes, in a similar way to what is already done by default for other corporate systems, such as ERP, SAGE and others.
The paper intends also to introduce a selection of subsystems to be monitored and, consequently, the sensors used, the communication network architecture that enabled integrating substations located in five States of four regions of the country.
Finally, the paper will report on how the corporate monitoring system was integrated into Celeo’s maintenance engineering routines, contributing to the achievement of important results in equipment failure risk reduction, reduction of shutdowns for maintenance, reduction of maintenance costs, and, consequently, improvement of the operating results. For this purpose, real-world cases of detection of risk conditions for reactors operating in regions with high ambient temperatures, as well as the mitigation actions in progress.
Therefore, the article will demonstrate how useful the information provided by the monitoring system are, as well as the feasibility of using it to positively influence maintenance routines at transmission utilities.