2p.y = 2a =760.4+3.42나0.2 +0.85Open circuit tests carried out on a 3.5 MVA, 4.16 kV, 60Hz, three phase star connected synchronous generatorgave the following results:EPM: Vpnt Ip.y (2p.u)► If (A):10▸ Ę₁ (KV):153.5 4.16 5.72025306.257.95=1+120° 6.2 +10.81+1 (0.87 176.1 +0.87 £76.7➤ In the short circuit test a field current of 20A was neededto circulate full load current. The armature winding 1+0.2+10resistance is 1.20 /phase, the field winding resistance is500 and the rotational loss is 250kW. Determine thepower angle, the voltage regulation and the efficiencywhen the generator delivers rated load at terminal voltageof 4.4 kV and at 0.8 power factor leading.▸ Draw the power flow diagram for the generator andinclude all values of power flows.1.2 + JoE =14743

Answered: Image /qna-images/answer/77b84624-5ebc-4634-8220-e11e4d5c7784.jpg

Answered: 2p.y = 2a = 76 0.4+3.42 나 0.2 +0.85…

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.13P

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A 3-phase overhead transmission line delivers a load of 80 MW at0.8 p.f. lagging and 220 kV between the lines. Its total seriesimpedance per phase and total shunt admittance per phase are 200ohms with an angle of 80 degrees and 0.0013 mho with an angle of90 degrees per phase respectively. Using nominal-T method,determine the following:(i) A, B, C, D constants of the line(ii) Sending end voltage(iii) Sending end current(iv) Sending end power factor(v) Transmission efficiency of the line
A three-phase transposed line is composed of one ACSR 1,431,000 cmil, 47/7 Bobolink conductor per phase with flat horizontal spacing of 11 meters as shown in Figure (a). The conductors have a diameter of 3.625 cm and a GMR of 1.439 cm. The line is to be replaced by a three-conductor bundle of ACSR 477,000 cmil, 26/7 Hawk conductors having the same cross-sectional area of aluminum as the single-conductor line (Figure (b)). The conductors have a diameter of 2.1793 cm and a GMR of 0.8839 cm. The new line will also have a flat horizontal configuration, but it is to be operated at a higher voltage and therefore the phase spacing is increased to 14 m as measured from the center of the bundles as shown in Figure (b). The spacing between the conductors in the bundle is 45 cm. Determine the inductance and capacitance for both lines. Calculate the percentage change in the capacitance and inductance for both lines. Interpret these changes.
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a 12500kva load is supplied at a power facter of 0.8 lagging by a 3 phase transmissiom line whose voltage is to be maintained at 33kv at both ends. Determine the capacity of the synchronous condenser to be installed given that the line resistance and reactance per phase are 5 ohms and 13 ohms respectively
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Outline the drawbacks and the advantages of six-and twelve phase transmission lines configarations.

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