In per-unit sequence models of three-phase three-winding transformers, for the general zero-sequence network, the connection between terminals
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In per-unit sequence models of three-phase three-winding transformers, for the general zero-sequence network, the connection between terminals \(\mathrm{H}\) and \(\mathrm{H}^{\prime}\) depends on how the high-voltage windings are connected:
(i) For solidly grounded Y, ____________ \(\mathrm{H}\) to \(\mathrm{H}^{\prime}\).
(ii) For grounded \(\mathrm{Y}\) through \(Z_{n}\) connect ____________ from \(\mathrm{H}\) to \(\mathrm{H}^{\prime}\).
(iii) For ungrounded \(\mathrm{Y}\), leave \(\mathrm{H}-\mathrm{H}^{\prime}\) ____________.
(iv) For \(\Delta\), ____________ \(\mathrm{H}^{\prime}\) to the reference bus.
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Related Book For
Power System Analysis And Design
ISBN: 9781305632134
6th Edition
Authors: J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
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