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Transformer and load modeling in short circuit analysis for distribution systems

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3 Author(s)
Tan, A. ; Landis & Gyr Energy Manage., San Jose, CA, USA ; Liu, W.-H.E. ; Shirmohammadi, D.

Accuracy of short circuit analysis depends on the modeling of transformers and loads. This paper addresses implementation of various transformer and load models in a short-circuit analysis for three-phase unbalanced distribution systems. Detailed transformer models are derived and incorporated into a production grade short circuit program with three different load models. Our studies show that different transformer connections, load models, and loading conditions may have significant impact on post-fault currents and voltages. Some test results on PG&E distribution feeders are presented

Published in:

Power Systems, IEEE Transactions on  (Volume:12 ,  Issue: 3 )

Date of Publication:

Aug 1997

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