The figure shows a single-phase power system with three loads. The source voltage is V = 240 20° V and the impedances of these three loads are: Z1 = 10 230° 0; 22 = 10 45° Q ; Z3 = 10 Analytically answer the following questions about this power system: a) Assume that the switch shown in the figure is open, and calculate the current I, the power factor, and the real, reactive, and apparent powers supplied by the source. b) How much real, reactive, and apparent power is being consumed by each load with the breaker open? c) Assume that the switch shown in the figure is closed and calculate the current I, the power factor, the real, reactive and apparent powers supplied by the source. d) How much real, reactive, and apparent power is consumed by each load with the breaker closed? e) What happens to the current emanating from the source when the switch is closed? Why? V
The figure shows a single-phase power system with three loads. The source voltage is V = 240 20° V and the impedances of these three loads are: Z1 = 10 230° 0; 22 = 10 45° Q ; Z3 = 10 Analytically answer the following questions about this power system: a) Assume that the switch shown in the figure is open, and calculate the current I, the power factor, and the real, reactive, and apparent powers supplied by the source. b) How much real, reactive, and apparent power is being consumed by each load with the breaker open? c) Assume that the switch shown in the figure is closed and calculate the current I, the power factor, the real, reactive and apparent powers supplied by the source. d) How much real, reactive, and apparent power is consumed by each load with the breaker closed? e) What happens to the current emanating from the source when the switch is closed? Why? V
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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Power Flow Analysis
Power flow analysis is a topic in power engineering. It is the flow of electric power in a system. The power flow analysis is preliminary used for the various components of Alternating Current (AC) power, such as the voltage, current, real power, reactive power, and voltage angles under given load conditions and is often known as a load flow study or load flow analysis.
Complex Form
A power system is defined as the connection or network of the various components that convert the non-electrical energy into the electric form and supply the electric form of energy from the source to the load. The power system is an important parameter in power engineering and the electrical engineering profession. The powers in the power system are primarily categorized into two types- active power and reactive power.
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Transcribed Image Text:The figure shows a single-phase power system with three loads. The source voltage is V = 240 20° V
and the impedances of these three loads are: Z1 = 10 230° Q ; Z2 = 10 245° Q ; Z3 = 10 2-90° Q
%3D
Analytically answer the following questions about this power system:
a) Assume that the switch shown in the figure is open, and calculate the current I, the power
factor, and the real, reactive, and apparent powers supplied by the source.
b) How much real, reactive, and apparent power is being consumed by each load with the
breaker open?
c) Assume that the switch shown in the figure is closed and calculate the current I, the power
factor, the real, reactive and apparent powers supplied by the source.
d) How much real, reactive, and apparent power is consumed by each load with the breaker
closed?
e) What happens to the current emanating from the source when the switch is closed? Why?
V
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