Contents
What is the load on a transmission line?
Line loading is the process of adding load to power transmission lines by installing the necessary equipment, such as the loading coils, in series. Line loading can also refer to the actual load on the transmission line, and the loading is measured in real power (MW), apparent power (MVA) or amps (A).
What is power loss in transmission lines?
From the physics of electric power transmission, when a conductor is subjected to electric power (or voltage), electric current flows in the medium. Resistance to the flow produces heat (thermal energy) which is dissipated to the surroundings. This power loss is referred to as ohmic loss [3].
When does current flow in a transmission line?
When the voltage is applied across the sending end of the transmission line, current starts flowing between the conductors (due to imperfections of the dielectric medium). This current is called the charging current in the transmission line.
How to calculate the power of a transmission line?
Equation 3.20.8 gives the time-average power associated with a wave traveling in a single direction along a lossless transmission line. Using precisely the same procedure, we find that the power associated with the reflected wave is P − av = |ΓV + 0 |2 2Z0 = |Γ|2|V + 0 |2 2Z0 or simply P − av = |Γ|2P + av
How to calculate reactive power flow on an AC transmission line?
• Describe the basic make-up and theory of an AC transmission line • Given the formula for real power and information, calculate real power flow on an AC transmission facility • Given the formula for reactive power and information, calculate reactive power flow on an AC transmission facility
Why is charging current important in a transmission line?
Significance of charging current It reduces the load current, due to which line losses decreases, and hence the efficiency of the line is increased. It improves the power factor of the transmission line. Charging current improves the load capacity of the line.