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

Journal Article · Sun Aug 01 04:00:00 EDT 1982 · IEEE Trans. Power Appar. Syst.; (United States)

DOI:https://doi.org/10.1109/TPAS.1982.317645· OSTI ID:5872191

Roy, L; Rao, N D

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.

• Research Organization: Dept. of Electrical Engineering, Univ. of Calgary, Albertson
• OSTI ID: 5872191
• Journal Information: IEEE Trans. Power Appar. Syst.; (United States), Journal Name: IEEE Trans. Power Appar. Syst.; (United States) Vol. PAS-101:8; ISSN IEPSA
• Country of Publication: United States
• Language: English

Related Subjects

200300* -- Electric Power Engineering-- Power Transmission & Distribution-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
CALCULATION METHODS
COMPUTERIZED SIMULATION
ELECTRICAL EQUIPMENT
ELECTRICAL FAULTS
ENERGY SYSTEMS
EQUIPMENT
FEASIBILITY STUDIES
POWER SYSTEMS
POWER TRANSMISSION LINES
SHUNT REACTORS
SIMULATION