Influence of harmonics on power distribution system protection

Journal Article · Thu Mar 31 23:00:00 EST 1988 · IEEE Trans. Power Del.; (United States)

DOI:https://doi.org/10.1109/61.4292· OSTI ID:6899097

Fuller, J F; Fuchs, E F; Roesler, D J

The effects of nonsinusoidal voltages and currents on the performance of static underfrequency and overcurrent relays were experimentally studied. The tests were conducted such that the frequency, amplitude and phase shift of individual harmonics could be adjusted in a controlled manner by employing a waveform generator with a phase-locking circuit. The relation between the harmonic currents and voltages was modelled through the power system impedances within residential distribution systems. It was found that for harmonic voltage and current amplitudes, as they occur in distribution systems, underfrequency relays and the time delay operation of overcurrent relays show a marked deterioration in their performance. The instantaneous operating characteristics of overcurrent relays, however, are hardly affected by the presence of harmonic currents.

• Research Organization: Dept. of Electrical and Computer Engineering, Univ. of Colorado, Boulder, CO (US)
• OSTI ID: 6899097
• Journal Information: IEEE Trans. Power Del.; (United States), Journal Name: IEEE Trans. Power Del.; (United States) Vol. 3:2; ISSN ITPDE
• Country of Publication: United States
• Language: English

Related Subjects

200300* -- Electric Power Engineering-- Power Transmission & Distribution-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
CURRENTS
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
HARMONICS
MATHEMATICAL MODELS
NATIONAL ORGANIZATIONS
OSCILLATIONS
POWER DISTRIBUTION SYSTEMS
POWER TRANSMISSION
RELAYS
SWITCHING CIRCUITS
US DOE
US ORGANIZATIONS