Maurice Tutor

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    Argosy University/ Phoniex University/
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Category > Computer Science Posted 27 Jul 2017 My Price 4.00

unit reactances

For the three-phase power system with single-line diagram shown in Figure 9.22, equipment ratings and per-unit reactances are given as follows:

 

Select a base of 100 MVA, 345 kV for the transmission line. On that base, the series reactances of the line are X1 = X2 = 0.15 and X0 = 0.5 per unit. With a nominal system voltage of 345 kV at bus 3, machine 2 is operating as a motor drawing 50 MVA at 0.8 power factor lagging. Compute the change in voltage at bus 3 when the transmission line undergoes (a) a one-conductor-open fault, (b) a two-conductor-open fault along its span between buses 2 and 3.

 Figure 9.22

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Maurice Tutor
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Status NEW Posted 27 Jul 2017 11:07 AM My Price 4.00

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