skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Exact calculation of simultaneous faults involving open conductors and line-to-ground short circuits on inherently unbalanced power systems

Abstract

The analysis of simultaneous faults, especially involving mutually coupled lines on inherently unbalanced power systems using the symmetrical components technique, may not be practically feasible because of the difficulties encountered in the assembly of sequence networks and their solution. To alleviate these problems, this paper presents an alternative method for digitally simulating a basically unbalanced three-phase power system which is subjected to a shunt fault at one location and blown fuses or open conductors at another location. The method involves phase frame representation of network elements and the use of the distributed source solution technique in conjunction with the principle of superposition. The usefulness of the method is demonstrated by digitally simulating, on an originally unbalanced sample power system, one of the most frequently occurring simultaneous faults, that involving an open conductor and a line-to-ground short circuit on different phases. In addition, it is shown by a digital case study that for the balanced case, the method gives results which are in close agreement with those provided by the symmetrical component technique. In essence, the method covers a wide spectrum of conditions ranging all the way from the ability to analyze any combination of simultaneous faults on inherently unbalanced systemsmore » down to the solution of asymmetrical faults on normally balanced systems.« less

Authors:
;
Publication Date:
Research Org.:
Dept. of Electrical Engineering, Univ. of Calgary, Albertson
OSTI Identifier:
5872191
Resource Type:
Journal Article
Journal Name:
IEEE Trans. Power Appar. Syst.; (United States)
Additional Journal Information:
Journal Volume: PAS-101:8
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; ELECTRICAL FAULTS; COMPUTERIZED SIMULATION; POWER SYSTEMS; CALCULATION METHODS; FEASIBILITY STUDIES; POWER TRANSMISSION LINES; SHUNT REACTORS; ELECTRICAL EQUIPMENT; ENERGY SYSTEMS; EQUIPMENT; SIMULATION; 200300* - Electric Power Engineering- Power Transmission & Distribution- (-1989)

Citation Formats

Roy, L, and Rao, N D. Exact calculation of simultaneous faults involving open conductors and line-to-ground short circuits on inherently unbalanced power systems. United States: N. p., 1982. Web. doi:10.1109/TPAS.1982.317645.
Roy, L, & Rao, N D. Exact calculation of simultaneous faults involving open conductors and line-to-ground short circuits on inherently unbalanced power systems. United States. doi:10.1109/TPAS.1982.317645.
Roy, L, and Rao, N D. Sun . "Exact calculation of simultaneous faults involving open conductors and line-to-ground short circuits on inherently unbalanced power systems". United States. doi:10.1109/TPAS.1982.317645.
@article{osti_5872191,
title = {Exact calculation of simultaneous faults involving open conductors and line-to-ground short circuits on inherently unbalanced power systems},
author = {Roy, L and Rao, N D},
abstractNote = {The analysis of simultaneous faults, especially involving mutually coupled lines on inherently unbalanced power systems using the symmetrical components technique, may not be practically feasible because of the difficulties encountered in the assembly of sequence networks and their solution. To alleviate these problems, this paper presents an alternative method for digitally simulating a basically unbalanced three-phase power system which is subjected to a shunt fault at one location and blown fuses or open conductors at another location. The method involves phase frame representation of network elements and the use of the distributed source solution technique in conjunction with the principle of superposition. The usefulness of the method is demonstrated by digitally simulating, on an originally unbalanced sample power system, one of the most frequently occurring simultaneous faults, that involving an open conductor and a line-to-ground short circuit on different phases. In addition, it is shown by a digital case study that for the balanced case, the method gives results which are in close agreement with those provided by the symmetrical component technique. In essence, the method covers a wide spectrum of conditions ranging all the way from the ability to analyze any combination of simultaneous faults on inherently unbalanced systems down to the solution of asymmetrical faults on normally balanced systems.},
doi = {10.1109/TPAS.1982.317645},
journal = {IEEE Trans. Power Appar. Syst.; (United States)},
number = ,
volume = PAS-101:8,
place = {United States},
year = {1982},
month = {8}
}