Power Quality Indices Assessments on The Transmission Network in The Northeast of Brazil

The characteristics of the voltage sags are important in determining how extensive the impact of the event extension is on various consumer operations. It is important to remember that the end user equipment will have widely varying degrees of sensitivity, depending mainly upon the magnitude and duration of the event. The purpose of this paper is to provide information that can be used to establish the limit of performance indices of the Transmission System in the Northeast of Brazil, based on historical data. Example sag data are shown in several points of connection of the transmission grid. The survey results provide a knowledge base for monitoring, designing and utilizing voltage sags mitigating technologies.