A 30, 25 kVA, 380-V, 60-Hz induction motor is fed by a 30, 40-kVA, 2.2-kV synchronous...

  

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A 30, 25 kVA, 380-V, 60-Hz induction motor is fed by a 30, 40-kVA, 2.2-kV synchronous generator (SG) through the line (cable) and Y-Y transformer shown in the figure below. The transformer ratings are 30 kVA and 2200/380 V. The cable has a reactance of 0.15 and negligible resistance. The motor's power factor (PF) varies from 0.2 lagging at no load to 0.85 lagging at full load and can be given by PF≈ 0.65x + 0.2, where x is the loading factor. 40 kVA 2.2 kV SG 30 kVA 2200/380 V TOOT X=0.150 moo IM The transformer has the following characteristics: Open circuit test: Poc = 300 W, Voc = 380 V (line-to-line), loc = 2.28 A. Short-circuit test: Psc = 600 W, Vsc = 150 V (line-to-line), Isc = 7.87 A. Write a computer program to study the variation of the transformer efficiency and voltage regulation with the motor's kVA and PF. The program should plot a figure of efficiency versus %kVA (or loading factor) for when the PF varies from 0.2 to 0.85 lagging, and a figure of the voltage regulation versus the power factor at the rated load when the PF varies from 0.2 to 0.85 lagging. A 30, 25 kVA, 380-V, 60-Hz induction motor is fed by a 30, 40-kVA, 2.2-kV synchronous generator (SG) through the line (cable) and Y-Y transformer shown in the figure below. The transformer ratings are 30 kVA and 2200/380 V. The cable has a reactance of 0.15 and negligible resistance. The motor's power factor (PF) varies from 0.2 lagging at no load to 0.85 lagging at full load and can be given by PF≈ 0.65x + 0.2, where x is the loading factor. 40 kVA 2.2 kV SG 30 kVA 2200/380 V TOOT X=0.150 moo IM The transformer has the following characteristics: Open circuit test: Poc = 300 W, Voc = 380 V (line-to-line), loc = 2.28 A. Short-circuit test: Psc = 600 W, Vsc = 150 V (line-to-line), Isc = 7.87 A. Write a computer program to study the variation of the transformer efficiency and voltage regulation with the motor's kVA and PF. The program should plot a figure of efficiency versus %kVA (or loading factor) for when the PF varies from 0.2 to 0.85 lagging, and a figure of the voltage regulation versus the power factor at the rated load when the PF varies from 0.2 to 0.85 lagging.

Answer rating: 100% (QA)

Program include include int main Define the variables float Poc Vo... View the full answer