Sistema de aquisição de dados para monitoramento de malha de terra energizada

Abstract

The good performance of grounding system in substations and generating plants is an essential condition for their operation according with established quality standards. Therefore a continuous monitoring system for grounding grid is an important tool to aid technical teams to identify failed zones that depreciate the Power Systems operation. Some traditional measuring methods in grounding grids need the power system shutdown. However the concession contracts allow penalties for the unavailability of generation and transmission facilities. Therefore the constant adoption of grounding grid evaluation without the plant shutdown is important. Having these specifications as target this Dissertation presents an embedded system development for voltage and current measurement. Another proposed system component is the software to manage the measuring network and organize the collected information in a database to produce grounding system operation reports. An important aspect of the system is the adoption of wireless network technology to data transfer between each measuring instrument and a web server installed in the power plant operation center. The experimentally obtained results reinforce the system contribution and encourage new developments.