Two shunt generators A and B are to be operated in parallel to supply a commonload. Generator A has a no-load voltage of 240 volts and 220 volts when delivers aload current of 80 Amperes. Generator B has a no-load voltage of 230 volts and220 volts when delivers the same current as of Generator A.( Generator B isfloating)Assuming a straight line characteristics for both machines. Calculate the:a. Line voltage and the total load in Kilowatt when Generator B is "floating".b. Total load delivered by both machines when the line voltage is 225 volts.

From given characteristics we will find the resistances of both the machines. Generator is said to…

Answered: Two shunt generators A and B are to be…

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...

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Given the two-machine system of Figure below, we select quite arbitrarily a base voltage of 161 kV for the transmission line and a base voltampere of 20 MVA. Find the pu impedances of all componenrs referred to these bases. The apparatus has ratings as follows: Generator: 15 MVA, 13.8 kV, x=0.15 pu Motor: 10 MVA, 13.2 kV, x=0.15 pu T1: 25 MVA, 13.2-161 kV, x=0.10 pu T2: 15 MVA, 13.8-161 kV, x=0.10 pu Load: 4 MVA at 0.8 pf lag
1. Core losses and rotational losses in a dc generator can occur even at no load conditions. a. True b. False 2. Copper losses in a dc generator includes _____. a. Brush contact and armature winding losses b. Shunt field loss c. Core loss d. Shunt field loss, brush contact loss and armature winding loss 3. The series field in a series dc generator consist of _____ turns of _____ wires. a. heavy, few b. few, heavy c. heavy, heavy d. few, few 4.Discounting the voltage generated due to residual magnetism, the series generator can generate a fair amount of voltage even without load. a. True b. False 5. In a short-shunt compound dc generator, the shunt field circuit is connected in _____ to the _____ field/circuit. a. series, series b. parallel, series c. series, armature d. parallel, armature
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Problem 2 Two shunt generators A and B operate in parallel and their load characteristics maybe taken as straight lines. The voltage falls from 240V at no load to 200V at200A, while that of B falls from 245V at no load to 220V at 150A. Determine the bus bar voltage when supplying 66.9KW load. How is the load divided between two generators?
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