Electric Generator Protection

This presentation will review the basic concepts of how generators work, the tools developed to analyze faults and how the generator uses protective relays to detect faults and unsafe operating conditions. Generators are a major capital investment to the utility system and undetected faults can cause long and costly outages.
A protective relay today includes many protection functions that operate concurrently to analyze the voltages and currents in the generating unit and to detect faults. Protective relays must be selective, sensitive and fast in order to limit damage to the machine. The various protection functions used in a generator protection system will be discussed, including:
- Ground Fault Protection
- Phase to Phase Fault Protection
- Field Ground Protection
- Loss of Field Protection
- Unbalanced Current Protection
- Reverse Power Protection
- Over/Under frequency Protection
- Out of Step Protection
- Overexcitation Protection
Questions will be encouraged from the audience.
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- WCU Engineering
- 389 Centennial Drive
- Cullowhee, NC , North Carolina
- United States 28723
- Building: Belk Building
- Room Number: 324
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- Co-sponsored by WNC Power Engineering Society