Leitor óptico da posição de TAP de comutadores de TAP sob carga

Abstract

On-load TAP changer load is very important for controlling the voltage of buses supplied by secondary coil windings of transformers in power substations without the need to disconnect loads. Monitoring the TAP position of TAP tap-changers under load becomes essential for automatic voltage control and the correct functioning of the transformer parallelism system. This monitoring is done by intelligent electronic devices that receive information about the tap changer position through resistive crowns. Over time, the contacts of resistive sprockets wear out and require constant maintenance to avoid incorrect indication of position and blocking of parallelism and automatic tension control systems. To minimize maintenance and maximize the reliability of automated systems, Copel applies an optical reader that does not use mechanical contacts, which is very maintenance-free. This work defined a great result, however its installation is not simple and the prototypes were executed in order to contemplate specific installations. In order to facilitate installation, contemplate different devices and give more confidence to the project, a new version of the optical reader was developed. This work presents a new version and exposes how divergences between the projects, focusing on the improvements provided, the ease of installation, electrical diagrams used and integration with the various TAP drivers used in the company.