Laboratory investigation of an amplitude comparator based directional comparison digital protection scheme

Journal Article · Mon Oct 01 04:00:00 EDT 1990 · IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/61.103663· OSTI ID:6457758

Prakash, K S; Malik, O P; Hope, G S; Hancock, G C; Wong, K K ^[1]

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1. Dept. of Electrical Engineering, Univ. of Calgary, Calgary, Alberta T2N 1N4 (CA)

A directional comparison digital protection scheme has been implemented with a 16-bit single board computer at each end of the physical model of a transmission line and communication between the two ends. The protection algorithm makes use of the fundamental frequency components of the deviation signals of the voltage and phase shifted current. Software routines have been developed for fault monitoring, directional determination and the trip/block decision. Graphics features incorporated in the software are explained. Tests conducted on the physical model of a double circuit transmission line for various faults show that the direction to a fault is determined in 3 to 7 ms. The blocking features of the relay are demonstrated.

• OSTI ID: 6457758
• Journal Information: IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (USA), Journal Name: IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (USA) Vol. 5:4; ISSN 0885-8977; ISSN ITPDE
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
240100* -- Power Systems-- (1990-)
COMPUTER CODES
COMPUTER GRAPHICS
COMPUTERIZED CONTROL SYSTEMS
COMPUTERS
CONTROL SYSTEMS
DESIGN
DIGITAL COMPUTERS
ELECTRICAL EQUIPMENT
ELECTRICAL FAULTS
ENERGY SYSTEMS
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
PLANNING
POWER SYSTEMS
POWER TRANSMISSION LINES
RELAYS