Estimation of steady-state unbalanced system conditions combining conventional power flow and fault analysis software

Journal Article · Thu Feb 01 04:00:00 EST 1996 · IEEE Transactions on Power Systems

DOI:https://doi.org/10.1109/59.486128· OSTI ID:244777

Reichelt, D; Ecknauer, E ^[1]; Glavitsch, H ^[2]

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1. Nordostschweizerische Kraftwerke AG, Baden (Switzerland)
2. Swiss Federal Inst. of Tech., Zurich (Switzerland)

In real three-phase power systems the voltages and currents are not fully symmetrical. A method has been developed to estimate the effects of slight unbalanced network conditions for steady-state operation. A conventional power flow is followed by a linear incremental calculation using a three-phase model of the network. The unbalanced condition is handled like a multiple unbalanced fault. The process is illustrated for the case of a transformer bank with non-identical single phase units. The results show the effects of different transformer reactances and different voltage ratios, respectively.

• OSTI ID: 244777
• Report Number(s): CONF-950525--
• Journal Information: IEEE Transactions on Power Systems, Journal Name: IEEE Transactions on Power Systems Journal Issue: 1 Vol. 11; ISSN 0885-8950; ISSN ITPSEG
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
ELECTRICAL FAULTS
LOAD ANALYSIS
POWER DISTRIBUTION SYSTEMS
POWER TRANSMISSION
SYSTEM FAILURE ANALYSIS