A three-phase load of 10 A (power factor 0.8 (end)) is fed from point “1” 600 m away from a distribution transformer indicated by “O”, and another three-phase load of 15 A (power factor 0.85 (end)) from point “2” 400 m away from this point at the same time. Since the rated voltage of this low voltage line with underground cable is 231/400 V ( r = 1 ohm/km.phase and x = 0.5 ohm/km.phase.) a) Find the active and reactive current distribution in the line by drawing a separate diagram for each. b) Find the active, reactive and apparent power distribution in the line. c) Find the interphase voltage of point “1”
Short Transmission Line
A short transmission line is a transmission line that has a length less than 80 kilometers, an operating voltage level of less than 20 kV, and zero capacitance effect.
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.
A three-phase load of 10 A (power factor 0.8 (end)) is fed from point “1” 600 m away from a distribution transformer indicated by “O”, and another three-phase load of 15 A (power factor 0.85 (end)) from point “2” 400 m away from this point at the same time. Since the rated voltage of this low voltage line with underground cable is 231/400 V
( r = 1 ohm/km.phase and x = 0.5 ohm/km.phase.)
a) Find the active and reactive current distribution in the line by drawing a separate diagram for each.
b) Find the active, reactive and apparent power distribution in the line.
c) Find the interphase voltage of point “1”.
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