This paper describes the impact of voltage sags on the electric utility and industrial customers. Several utility measures are presented to minimize the customer's exposure to voltage sags. These measures cannot completely eliminate the impact of voltage sags on sensitive equipment, however. A case study is presented in this paper that includes measurement results that were used to characterize the voltage sags experienced on the utility system and in the industrial facility. Simulation results used to develop "area-of-vulnerability curves" for the industrial facility, mitigation equipment that was employed to improve the sensitive equipment's ridethrough capability and the lessons learned from the systems approach analysis are presented.

Voltage sags: their impact on the utility and industrial customers

This paper describes the impact of voltage sags on the utility and the customer`s equipment. Several utility measures are presented to minimize the customer`s exposure to voltage sags. However, these measures cannot completely eliminate the impact of voltage sags on sensitive equipment. Additional measures taken on the customer side are presented. These measures were incorporated to minimize the impacts of voltage sags on the customer. In this case study, the lessons learned from the systems approach analysis can be applied to resolve a wide range of voltage sag problems.

E.G. Dolack

Papers

Power quality case studies-voltage sags: The impact on utility and industrial customers