Title :
Protection of power plant transformers using digital technology
Author :
Mozina, Charles J.
Author_Institution :
Beckwith Electr. Co. Inc., Largo, FL, USA
Abstract :
The following specific areas of transformer protection are addressed in this paper. (1) Power plant transformer protection: overexcitation and differential restraint; generator step-up unit (GSU) transformer ground fault protection; and auxiliary/start-up and industrial transformer protection; (2) Transmission substation transformer protection: overexcitation (V/Hz); protection; and sudden pressure relay (SPR) blocking. (3) Distribution substation transformer protection: underfrequency/undervoltage load shedding. (4) Distribution substation logic schemes: bus fault logic; feeder back-up logic; and two-bank substation load shedding. This paper concentrates on protective functions within digital multifunction transformer relays as well as the logic that can be applied with this technology
Keywords :
load shedding; power transformer protection; relay protection; substations; bus fault logic; differential restraint; digital multifunction transformer relays; digital technology; distribution substation logic schemes; distribution substation transformer protection; feeder back-up logic; generator step-up unit; industrial transformer protection; overexcitation; overexcitation protection; power plant transformer protection; power plant transformers protection; protective functions; sudden pressure relay blocking; transformer ground fault protection; transmission substation transformer protection; two-bank substation load shedding; underfrequency load shedding; undervoltage load shedding; Digital relays; Logic; Packaging; Power generation; Power system protection; Power system relaying; Protective relaying; Substation protection; Transformers; Voltage control;
Conference_Titel :
Transmission and Distribution Conference, 1999 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-5515-6
DOI :
10.1109/TDC.1999.755388
