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Basic Concepts of Electrical Power Transmission

Electrical Power Transmission Line is nothing but “Connection” between Electrical Power Generating Station And Electrical Power Distribution Station.

Different Types of Voltage levels :-

Low Voltage:- 230Volts 1-Ph, 440Volts 3-Ph

High Voltage:- 11Kv , 33Kv

Extra High Voltage:- 66Kv, 132Kv, 220Kv and 400Kv

Ultra High Voltage:- 765Kv and Above


Electrical Power Transmission parameters:-

An Electrical Power Transmission Line can be explained by series combination of Resistance(R), Conductance(G), Inductance(L) and Capacitance(C). These all Parameters are uniformly distributed along the whole Transmission Line. These parameters are related to Line Geometry, Operating Frequency and Construction.

1. Resistance (R):-

Effective Resistance of Conductor, R = Power Loss in Conductor/I^2
For DC Resistance, R=ρl/A
where,
ρ= Resistivity of Conductor
l= Length of  Conductor
A= Area of Cross section of Conductor
Value of Resistance(R) is generally Low in Electrical power transmission Line.

2. Inductance(L):-

Inductance, L=NΦ/I
where,
NΦ= Flux Linkage
I= Current flow

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