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This paper relates a number of generator tripping events that occurred within industrial plants in the hope that the ldquolessons learnedrdquo will help others avoid the events described. In many cases, these failures involved human errors and could have been avoided with proper generator protection or personnel training. In a number of cases, plant operators contributed or caused the events. These...
This paper was written by a Working Group of the IEEE Power System Relay Committee to provide guidance to the industry to better coordinate generator protection with generator control. The paper discusses specific calculation methods that can be used to ensure that generator protection and excitation system control are fully coordinated. It also specifically addresses the coordination of relays with...
This paper relates a number of generator tripping events that occurred within industrial plants in the hope that the ldquolessons learnedrdquo will help others avoid the events described. In many cases, these failures involved human errors and could have been avoided with proper generator protection or personnel training. In a number of cases, plant operators contributed or caused the events. These...
This paper was written by a working group of the IEEE power system relay committee to provide guidance to the industry to better coordinate generator protection with generator control. The paper discusses specific calculation methods that can be used to ensure that generator protection and excitation system control are fully coordinated. It also specifically addresses the coordination of relays with...
This paper discusses the experiences of several users with the application of three different 100% stator ground fault protection schemes. Two third-harmonic methods and a low frequency-injection method are included. This paper explains situations in which third-harmonic schemes work, and also the limitations of these schemes, which are not well understood by many relay engineers. It also discusses...
Contrary to popular belief, generators can fail - not only from short circuits - but also from abnormal electrical conditions such as overexcitation, overvoltage, loss-of-field, and unbalanced currents. When subjected to these abnormal conditions, damage or complete failure of the generator can occur within seconds. In many cases, these failures can be prevented by proper generator protection
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