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Frequency-dependent transmission line modeling utilizing transposed conditions

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1 Author(s)
Gustavsen, B. ; SINTEF Energy Res., Trondheim, Norway

Existing phase domain transmission line models are capable of producing highly accurate results for both overhead lines and underground cables. This paper introduces a hybrid line model which gives substantial savings in computation time without loss of accuracy, when one or more circuits of a transmission system are treated as continuously transposed. This is achieved by means of a constant transformation matrix in combination with a reduced-size phase domain line model and a number of single-phase (modal) line models. The calculated examples demonstrate a potential speed increase over a full phase domain model between three and four. If none of the circuits are transposed, the line model degenerates into a full phase domain line model.

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Power Delivery, IEEE Transactions on  (Volume:17 ,  Issue: 3 )