VOLTAGE SAG COORDINATION FOR RELIABLE PLANT-OPERATION

This paper offers techniques to coordinate sensitive electric equipmen t with predicted or measured voltage sag characteristics. The techniqu es for predicting voltage sag characteristics have already been develo ped and proposed for Chapter 9 of the Gold Book, This paper describes the coordination techniques and another section that are planned for i nclusion in Chapter 9, The techniques provide a display of sag charact eristics and equipment sensitivity on a simple graphical display, This greatly simplifies the coordination of sensitive equipment with sag c haracteristics on the electric supply mains, The paper also covers a d iscussion of sag reporting options that is planned for Chapter 9 and s ome suggestions on future extensions for this coordination technique.