Performance analysis of microcomputer based differential protection of UHV lines under selective phase switching

Journal Article · Sun Apr 01 00:00:00 EST 1990 · IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/61.53057· OSTI ID:7080843

Bhatti, A A ^[1]

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1. Dept. of Electrical Engineering, Memphis State Univ., Memphis, TN (US)

This paper examines the effects of primary and secondary fault quantities as well s of mutual couplings of neighboring circuits on the sensitivity of operation and threshold settings of a microcomputer based differential protection of UHV lines under selective phase switching. Microcomputer based selective phase switching allows the disconnection of minimum number of phases involved in a fault and requires the autoreclosing of these phases immediately after the extinction of secondary arc. During a primary fault a heavy current contribution to the healthy phases tends to cause an unwanted tripping. Faulty phases physically disconnected constitute an isolated fault which being coupled to the system affects the current and voltage levels of the healthy phases still retained in the system and may cause an unwanted tripping. The microcomputer based differential protection, appears to have poor performance when applied to uncompensated lines employing selective pole switching.

• OSTI ID: 7080843
• Journal Information: IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (USA), Vol. 5:2; ISSN 0885-8977
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
UHV AC SYSTEMS
COMPUTERIZED CONTROL SYSTEMS
UHV DC SYSTEMS
COMPUTERIZED SIMULATION
DIGITAL SYSTEMS
ELECTRICAL FAULTS
MICROPROCESSORS
PERFORMANCE TESTING
SWITCHING CIRCUITS
VOLTAGE REGULATORS
AC SYSTEMS
COMPUTERS
CONTROL SYSTEMS
DC SYSTEMS
ELECTRONIC CIRCUITS
ENERGY SYSTEMS
MICROELECTRONIC CIRCUITS
POWER SYSTEMS
SIMULATION
TESTING
240200* - Power System Networks
Transmission & Distribution- (1990-)
240100 - Power Systems- (1990-)
990200 - Mathematics & Computers
240500 - Power Transmission & Distribution- Environmental Aspects- (1990-)