Title :
Large mill power outages caused by potential transformer ferroresonance
Author :
Crane, D. Ray ; Walsh, George W.
Author_Institution :
Weyerhauser Paper Co., Columbus, MS, USA
Abstract :
Investigative procedures relating to a subtle 30 Hz ferroresonant instability of high-voltage potential transformers, which has caused several costly power outages to a large paper mill are reported. Included are unusual field oscillograms of this instability. Corrective measures were developed which have been implemented. An alternate recommended approach is to be incorporated in a similar high-voltage supply to a new mill to eliminate this instability as a possible jeopardy to selective ground-relay protection
Keywords :
paper industry; potential transformers; power transformers; 30 Hz; field oscillograms; ground-relay protection; instability; paper mill; potential transformer ferroresonance; power outages; power transformers; Circuit faults; Ferroresonance; Milling machines; Petroleum; Power system protection; Power system relaying; Protective relaying; Relays; Voltage control; Voltage transformers;
Journal_Title :
Industry Applications, IEEE Transactions on
