TRANSMISSION PARAMETERS Flashcards
PARAMETERS OF
TRANSMISSION LINE
Resistance
Inductance
Capacitance
Conductance
is the opposition of line conductors to the
current flow
Resistance
is the material property of the conductor.
Resistivity (ρ)
It does not depend on the shape or size of the
conductor but varies with temperature.
Resistivity (ρ)
Uses a stranded conductor in transmission line. For
stranded conductors, alternate layers of strands spirals in
opposite directions.
Resistivity (ρ)
the length of the line used.
Length (L)
The area of a circle that has the
same radius as the wire.
Cross Sectional Area (A)
inversely proportional to the resistance
Cross Sectional Area (A)
he frequency of the AC voltage produces
a second effect on the conductor resistance
Frequency effect
nonuniform distribution of the current
skin effect
reduces the effective cross-section area
used by the current, and thus, the effective resistance increases
skin effect
is a property of electrical conductors that
describes how much they oppose changes in electric
current
Inductance
is created when a current flows through a conductor
Magnetic field
any change in magnetic
field through a circuit induces an Electromotive Force (EMF)
in the conductors
Faraday’s Law of induction
tendency of an
electrical conductor to oppose a change in electrical current
flowing through it is called
Inductance
Current flowing in one conductor can induce a voltage
in one neighbouring conductor. When designing the
space between conductors, it is very important to
consider the
Inductance
is a device consisting of two electrical
conductors that are separated by a non conducting
substance. Non conducting substance can be any insulator
or even air.
Capacitor
In transmission lines, we have conductors separated by air.
This means that they act as
Capacitor
The effect of
capacitor is also known as
Capacitance
is normally due to the leakage over the
line insulator
conductance
refers to the measure
of how easily current can flow through the insulating
material between the conductors
conductance
are connected in series as they
are properties of a conductor.
Resistance and inductance
are shunt elements because they are properties of dielectric
material or insulators between conductors
Capacitance and conductance
