An accurate fault locator with compensation for apparent reactance in the fault resistance resulting from remote-end infeed

Journal Article · Fri Feb 01 04:00:00 EST 1985 · IEEE Trans. Power Appar. Syst.; (United States)

DOI:https://doi.org/10.1109/MPER.1985.5528881· OSTI ID:6120362

Ericksson, L; Rockefeller, G D; Saha, M M

A microprocessor based fault locator is described, which uses novel compensation techniques to improve accuracy. It displays the distance to the fault in percent of transmission line length, for facilitating repair and restoration following a permanent fault. Also, it pinpoints weak spots following transient faults. This new method for fault location on electric power transmission lines uses recorded phase currents and voltages at the near end. The main feature of the method is that it considers the influence of the remote-end infeed of the transmission line by using a complete network model. A microprocessor filters the ac currents and voltages from the protective relaying instrument transformers to extract the fundamental components of the signals. It then computes the distance to the fault point, compensating for the apparent reactance in the fault resistance resulting from load current and the variations in impedance angles in the power-system network. The design has undergone field tests and evaluation. The outcome of the field tests is presented and has confirmed the validity of the concept of the fault locator, showing an accurate display of the distance to fault.

• Research Organization: ASEA AB, Vasteras
• OSTI ID: 6120362
• Journal Information: IEEE Trans. Power Appar. Syst.; (United States), Journal Name: IEEE Trans. Power Appar. Syst.; (United States) Vol. PAS-104:2; ISSN IEPSA
• Country of Publication: United States
• Language: English

Related Subjects

200300 -- Electric Power Engineering-- Power Transmission & Distribution-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
42 ENGINEERING
420800* -- Engineering-- Electronic Circuits & Devices-- (-1989)
ACCURACY
COMPUTERS
DIGITAL FILTERS
ELECTRICAL FAULTS
ELECTRONIC CIRCUITS
IMPEDANCE
MEASURING INSTRUMENTS
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
POWER DISTRIBUTION SYSTEMS
POWER TRANSMISSION LINES