Fast system for analysis of protection events

Abstract

The often unexpected load growth, failures of protection-related equipment and inadequate parameterization of protection functions make the analyses of protection events more complex and time-consuming. Besides, the amount of information that can be retrieved from modern digital relays is constantly increasing. In order to aid a quick decision-making and maintenance practices, this project aimed to implement a complete diagnosis system that is automatically activated whenever a protection-related event occurs. It covers the automation of the analysis system and the analysis system itself, which uses an expert system to process the data. It was important to observe that it is able to analyze different data sets in order to ensure the delivery of a report even when not all the expected input data is available. The system was successfully installed in a distribution substation of a Brazilian power distribution utility.