Protective device coordination in an industrial power system with multiple sources

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · IEEE Transactions on Industry Applications

DOI:https://doi.org/10.1109/28.605753· OSTI ID:538136

Sutherland, P E ^[1]

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1. General Electric Co., Schenectady, NY (United States). Power Systems Energy Consulting Dept.

Protective device coordination in an industrial power system with electric utility ties and multiple in-plant generators presents challenges that cannot be resolved by the use of conventional time-current curves. Relays in different locations will detect greatly different currents during the same fault. This may be resolved by the use of the conventional per-unit time-current curve. However, many computer-aided time-current curve programs do not support this technique. The coordination of time overcurrent relays in this case can best be performed numerically using tables or spreadsheets. In addition, spreadsheet techniques may be used for setting other relays, such as feeder protection relays. An example of the coordination of an industrial power system with multiple generators connected through a synchronizing bus, which also has two utility ties, will be examined to illustrate these points.

• OSTI ID: 538136
• Journal Information: IEEE Transactions on Industry Applications, Journal Name: IEEE Transactions on Industry Applications Journal Issue: 4 Vol. 33; ISSN ITIACR; ISSN 0093-9994
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ELECTRICAL TRANSIENTS
EQUIPMENT PROTECTION DEVICES
INDUSTRIAL PLANTS
INTERCONNECTED POWER SYSTEMS
OVERCURRENT