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What do you mean by transmission line efficiency and regulation? Can it be negative also?

      

What do you mean by transmission line efficiency and regulation? Can it be
negative also?

  

Answers


gregory
The ratio of receiving end power to the sending end power of a transmission line is
known as the transmission efficiency of the line.
% Transmission Efficiency =(Receiving end power /Sending end power) x 100;
= (VR IR cosfR/ VS
IS
cosfS
) x100;
where VR ,IR and cosfR are the receiving end voltage, current and power factor while VS
, IS
cosfS
are the corresponding values at sending end.
Voltage Regulation :-
The difference in the voltage at the receiving end of a transmission line between the
conditions of no load and full load is called voltage regulation and is expressed as a
percentage of the receiving end voltage.
Mathematically,
% voltage regulation =(VS
–VR)/VR x 100;
%Voltage regulation is also given by= (I R cos fR ± I X sin fR)/ER x100;
+ for lagging pf
– for leading pf;
When the pf is leading, and the term IX sin fR is more than the I R cosfR,
then the voltage
regulation becomes –ve.
gregorymasila answered the question on February 20, 2018 at 16:22


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