Title :
Benefits of upgrading: paper mill generator protection
Author :
Mozina, Charles J. ; Moody, Douglas C.
Author_Institution :
Beckwith Electr. Co. Inc., Largo, FL, USA
Abstract :
There are a number of functional protection areas on paper mill generators 20 years or older that have significant shortcomings when compared to current IEEE recommended generator-protection practices. This article identifies these protection areas and the risks of not addressing the shortcomings. It also points out the advantages of using multifunction digital relaying to upgrade generator protection as a technology that offers many advantages over older electromechanical relays. The completed upgrade project at MeadWestvaco´s Luke Mill in Maryland provided a number of examples of these benefits in uncovering mill problems that, if they had gone undetected, could have resulted in costly mill shutdowns or damage to mill generators.
Keywords :
AC generators; machine protection; paper industry; relay protection; 13.8 kV; IEEE recommended generator-protection practices; Maryland; MeadWestvaco´s Luke Mill; cascading event; dual-level loss-of-field protection; field ground fault detection; generator loss-of-field tripping; generator protection; ground differential protection; inadvertent generator energizing; multifunction digital relaying; negative sequence protection; oscillographic monitoring; paper mill generators; sensitive overexcitation volts-per-Hertz protection; sequential tripping; stator grounding; unbalanced current protection; voltage transformer fuse loss protection; Communication system control; Digital relays; Fault currents; Milling machines; Paper mills; Power system protection; Power system relaying; Protective relaying; Stators; World Wide Web;
Journal_Title :
Industry Applications Magazine, IEEE
DOI :
10.1109/MIA.2003.1180948
