Fault analysis of multi-phase unbalanced nonradial power distribution systems

Journal Article · Mon May 01 04:00:00 EDT 1995 · IEEE Transactions on Industry Applications

DOI:https://doi.org/10.1109/28.382113· OSTI ID:55485

Halpin, S M ^[1]; Grigsby, L L ^[2]

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1. Mississippi State Univ., Mississippi State, MS (United States). Dept. of Electrical and Computer Engineering
2. Auburn Univ., AL (United States). Dept. of Electrical Engineering

Algorithms are presented in this paper for the accurate determination of voltages, currents, and power flows in faulted three-phase unbalanced nonradial power distribution systems. The calculation of steady-state fault currents begins from a converged power flow solution and uses generalized models for all power system components. These component models are formulated using a linear graph theory approach to network modeling. The linear graph modeling techniques are extended to form an admittance matrix system model. The three-phase source and load models that are used are based on an extension of the traditional models used to represent these elements in fault studies using symmetrical components. The distribution system model consisting of sources, loads, lines, transformers, and other components is modified to account for the fault and solved to yield the line-to-neutral voltages at each bus in the faulted distribution system. The faulted system current and power flows are determined using these voltages. The results obtained using the proposed modeling approach on a system provided by a local industry are compared with the results obtained from an existing classical three-phase fault analysis algorithm, and conclusions are drawn based on these comparisons.

• OSTI ID: 55485
• Journal Information: IEEE Transactions on Industry Applications, Journal Name: IEEE Transactions on Industry Applications Journal Issue: 3 Vol. 31; ISSN 0093-9994; ISSN ITIACR
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
ELECTRICAL FAULTS
MATHEMATICAL MODELS
POWER DISTRIBUTION SYSTEMS
POWER TRANSMISSION LINES
SYSTEM FAILURE ANALYSIS