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The equivalentπcircuit is identical in structure to the nominalπcircuit.

(a) True

(b) False

Short Answer

Expert verified

Therefore, the correct option is (a) True.

Step by step solution

01

Determine the equivalent and nominal π diagrams.

Draw the equivalent πdiagram.

Draw the nominal π diagram.

02

Determine the correct option.

By observing the figure 1 and figure 2, it is clear that, both are same.

The only difference is, in figure 1, the impedance represented by Z' and admittance represented by Y'.

In figure 2, the impedance and admittance represented by ZandY.

Hence, the equivalent πcircuit is identical in structure to the nominal πcircuit.

Therefore, the correct option is (a) True.

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Most popular questions from this chapter

The 100km,230kV,60Hz,three-phase line in Problems 4.18 and 4.39 delivers300MVAat 218kVto the receiving end at full load. Using the nominalπcircuit, calculate the ABCDparameters, sending-end voltage, and percent voltage regulation when the receiving-end power factor is (a) 0.9lagging, (b) unity, and (c)0.9leading. Assume a50°Cconductor temperature to determine the resistance of this line.

A 60-Hz, 230-mile, three-phase overhead transmission line has a series impedance z=Ω0/mi843179.04 and a shunt admittance y=5.105×10-690S/mi.The load at the receiving end is 125 MW at unity power factor and at 215 kV. Determine the voltage, current, and both real and reactive power at the sending end and the percent voltage regulation of the line. Also find the wavelength and velocity of propagation of the line.

The per-phase impedance of a short three-phase transmission line is0.553.15°Ω. The three-phase load at the receiving end is1200 kWat0.8p.f. lagging. If the line-to-line sending-end voltage is 3.3kV, determine (a) the receiving-end line-to-line voltage inand (b) the line current. Draw the phasor diagram with the line current l, as reference.

The line in Problem 5.14 has three ACSR 1113kcmilconductors per phase. Calculate the theoretical maximum real power that this line can deliver and compare with the thermal limit of the line. Assume Vs=VR=1.0per unit and unity power factor at the receiving end.

Identical series capacitors are installed at both ends of the line in Problem 5.14, providing 40% total series compensation. Determine the equivalent ABCDparameters of this compensated line. Also calculate the impedance of each series capacitor.

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