Repeat Problem 5.45 for the $500-mathrm{kV}$ line given in Problem 5.10. Data From Problem 5.45:- For the

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Repeat Problem 5.45 for the $500-\mathrm{kV}$ line given in Problem 5.10.

Data From Problem 5.45:-

For the line in Problems 5.14 and 5.38, determine: (a) the practical line loadability in \(\mathrm{MW}\), assuming \(\mathrm{V}_{\mathrm{S}}=1.0\) per unit, \(\mathrm{V}_{\mathrm{R}} \approx 0.95\) per unit, and \(\delta_{\max }=35^{\circ} ;\) (b) the full-load current at 0.99 p.f. leading, based on the above practical line loadability; (c) the exact receiving-end voltage for the full-load current in (b) above; and (d) the percent voltage regulation. For this line, is loadability determined by the thermal limit, the voltagedrop limit, or steady-state stability?

Data From Problem 5.38:-

The line in Problem 5.14 has three ACSR 1113-kcmil conductors per phase. Calculate the theoretical maximum real power that this line can deliver and compare with the thermal limit of the line. Assume \(V_{S}=V_{R}=1.0\) per unit and unity power factor at the receiving end.

Data From Problem 5.14:-

A \(400-\mathrm{km}, 500-\mathrm{kV}, 60-\mathrm{Hz}\) uncompensated three-phase line has a positive-sequence series impedance \(z=0.03+j 0.35 \Omega / \mathrm{km}\) and a positive-sequence shunt admittance \(y=j 4.4 \times 10^{-6} \mathrm{~S} / \mathrm{km}\). Calculate: (a) \(Z_{c}\), (b) \((\gamma l)\), and (c) the exact \(A B C D\) parameters for this line.

Data From Problem 5.10:-

The \(500-\mathrm{kV}, 60-\mathrm{Hz}\) three-phase line in Problems has a \(180-\mathrm{km}\) length and delivers \(1600 \mathrm{MW}\) at \(475 \mathrm{kV}\) and at 0.95 power factor leading to the receiving end at full load. Using the nominal \(\pi\) circuit, calculate the: (a) \(A B C D\) parameters, (b) sending-end voltage and current, (c) sending-end power and power factor, (d) full-load line losses and efficiency, and (e) percent voltage regulation. Assume a \(50{ }^{\circ} \mathrm{C}\) conductor temperature to determine the resistance of this line.

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Related Book For  book-img-for-question

Power System Analysis And Design

ISBN: 9781111425777

5th Edition

Authors: J Duncan Glover, Mulukutla S Sarma, Thomas Overbye

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