3-LA single phase - single line diagram of a synchronous generator connected in parallel to the network is given in the figure below. Given (back-EMF) EA and (mains voltage) VQ, phase are voltages. From this generator to the grid with a power back coefficient of 0.8387 la =100 A current is flowing (provided). Wind-friction and iron of the generator The total value of the losses is 3.1 kW. X = 10 R, = 0.1 0 www Vamu =230|0 a.) Find the value of the internal power factor angle (the angle between EA and VQ) and the value of EA b.) What is the value of the efficiency of the generator?

3-LA single phase - single line diagram of a synchronous generator connected in parallel to the network is given in the figure below. Given (back-EMF) EA and (mains voltage) VQ, phase are voltages. From this generator to the grid with a power back coefficient of 0.8387 la =100 A current is flowing (provided). Wind-friction and iron of the generator The total value of the losses is 3.1 kW. X = 10 R, = 0.1 0 www Vamu =230|0 a.) Find the value of the internal power factor angle (the angle between EA and VQ) and the value of EA b.) What is the value of the efficiency of the generator?

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

2. A four-pole three-phase 50 hertz, star connected AC generator has 12 stator slots. There are 4 conductors per slot and a sinusoidally distributed flux per pole of 36mWb. Find the terminal voltage on open circuit. If the coil span factor is 0.85 lagging.
Could you please answer this question and explain all your approaches, formulas and solution step by step. Thanks in advance.
If the load is connected to the generator thgrough an inductive line and the voltage at the load side is the same as the voltage at the terminals of the generator, which of the following must be true? O A. The reactive power is flowing from the generator to the load and from load to the generator at the same time. O B. The load is disconnected, and no power is delivered to the load. O C. The load has a poor power factor and it's absorbing too much reactive power. O D. None of the other choices are correct O E. The generator is unable to produce reactive power; therefore, the reactive power is flowing from the load to the generator.
Why are alternators connected in parallel? What are the conditions for parallel connection? Explain.
X₂=0.1 1 XL +03 Soto X₁ = 0.2 X = 0.1 X = 0.1 Above is the one-line diagram of a simple power system. Each generator is represented by an emf behind the subtransient reactance. All impedances are expressed in per unit on a common base. All resistances and shunt capacitance are neglected. The generators are operating on no load at their rated voltage with their emfs in phase. A symmetrical fault occurs at bus 1 through a fault impedance Z, =j0.08 per unit. a) Using Thevenin's Theorem, determine the impedance to the point of fault and the fault current in per unit. b) Find the bus voltages and line currents during the fault. 2 O oto
Is there a difference between the phase windings resistances, if so, what does it mean? Please explain.
Figure below shows a power system. The rating of generators and transformers are:G1:25MVA, 6.6KV, jO.2 p.u. G2:15MVA, 6.6KV, jo.15 p.u. G3:30MVA, 13.2KV, jo.15 p.u. T1: 30MVA, 6.6A- 115Y KV, jo.1 p.u.T2: 15MVA, 6.6A- 115Y KV, jo.1 p.u. T3:single phase units each rated 10MVA, 69/ 6.9 KV, jo.1 p.u. Find te reactances in p.u, take a base of 30MVA, 6.6 KV in the circuit of G1 .=.XG1 G2} 4 A lubu T2 T1 T3 G1 G3 j120 2 j90 N
50 KW, 240 V enduvi resistance of a generator with foreign excitation is 0.02 ohms. Generatorproduces rated voltage at rated load. Endüvi voltage and endüvi current at rated loadcalculate? If the output voltage is kept constant at 240V and the output power is reduced to 45 KWfind the enduvi tension necessary for this?
Q.3/ state the rotating parts of DC generator.
The maximum efficiency of 10Kw D.C generator is 98% and occurs at 80% of full load. Find the total copper losses at rated load
A d.c. series generator supplies the load of 5 kW at 250 volts. The armature resistance and series field resistances are 1 ohm and 0.5 ohm respectively. Determine the value of the induced emf.
The shaft of a three-phase synchronous generator is rotating at 3000 RPM. This generator is inducing a torque of 100.0 N.m under a certain load. If the copper losses are neglected, and the sum Praw + Pcore + Pstray = 7854 Watt, find the efficiency of the generator under those conditions. Answer: The % efficiency is: