Consider the circuit shown below which is a simplified model of a source delivering ap- proximately 2.5 MW to a load. Energy is carried between the source and the load by two conductors that each have resistance of 8 2. A bird lands on the "upper" conductor about three-quarters of the way toward the load so that there is 6 12 between the bird and the source and there is 2 52 between the bird and the load. (a) Using the circuit as drawn, find the voltage at the bird's head. (b) The bird and the upper conductor form an inverted T which can be converted to a A. Redraw the circuit after performing this conversion. (c) The conversion effectively makes the bird's body disappear, but the top of its head remains right where it was. Using the A arrangement of resistors, show that the voltage at the top of the bird's head is the same as with the T arrangement. Head 50 kV Bird 692 www www 500 £2 892 www 292 Load <1kQ

Consider the circuit shown below which is a simplified model of a source delivering ap- proximately 2.5 MW to a load. Energy is carried between the source and the load by two conductors that each have resistance of 8 2. A bird lands on the "upper" conductor about three-quarters of the way toward the load so that there is 6 12 between the bird and the source and there is 2 52 between the bird and the load. (a) Using the circuit as drawn, find the voltage at the bird's head. (b) The bird and the upper conductor form an inverted T which can be converted to a A. Redraw the circuit after performing this conversion. (c) The conversion effectively makes the bird's body disappear, but the top of its head remains right where it was. Using the A arrangement of resistors, show that the voltage at the top of the bird's head is the same as with the T arrangement. Head 50 kV Bird 692 www www 500 £2 892 www 292 Load <1kQ

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

Chapter6: Power Flows

Section: Chapter Questions

Problem 6.61P

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