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Question 44888

posted 10 months ago

(a) Find the sequence networks and equivalent impedances.
5) In a 3-phase power as shown in the following figure, voltages of both the generators A and B are1.020° in per unit. The impedances of the first generator (A) are X, = j0.3, X2 = j0.2, and Xo = j0.05,all in per-unit. Similarly, the impedances of the second generator (B) are X1 = j0.25, X2 = j0.15, and Xo = j0.03, all in per-unit. Impedances of the first transformer (TR1) are X1 = X2 = Xo = j0.12 and impedances of the second transformer (TR2) are X1 = X2 = Xo = j0.10. Positive, negative and zero sequence impedances of both lines are X1 = X2 = 0.3 an Xo = j0.7 in per unit, respectively.If a double line to ground fault occurs at point F (assume the voltage at the point F before the fault is 1.020° in per unit);
(b) Combine the equivalent circuits according to the connections of a double line to ground fault.
(c) Find the per-unit value of fault current If.

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Question 44889

posted 10 months ago

\text { Power system parameters: } 220 / 380 \mathrm{~V}, k=35, \cos \varphi=0.8 \text { (lagging) for all loads, } f(\varphi)=1.44
7) In a 3-phase power system shown in the following figure, determine the cross-sectional value foreach lines providing that the total voltage drop does not exceed 5%.

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Question 45566

posted 10 months ago

Enumerate the functions of a smart inverter.

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Question 45563

posted 10 months ago

Enumerate the various impacts of high PV penetration on the distribution system.

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Question 45568

posted 10 months ago

Discuss the various impacts of electric vehicle load on the distribution system.

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Question 45569

posted 10 months ago

State the differences between North American distribution circuit and European distribution circuit.

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Question 45570

posted 10 months ago

Discuss the measures to mitigate EV load impacts by upgrading the distribution system infrastructure.

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Question 45565

posted 10 months ago

Discuss the impact of high PV penetration on automatic voltage regulation equipment.

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Question 45571

posted 10 months ago

State the advantages and disadvantages of using Time-of-Use (TOU) pricing strategy for EV charging.

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Question 45564

posted 10 months ago

What is a masked load? How does it occur? Discuss its impact on the distribution circuits.

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