Reactance of Overhead Line (with neighbouring o/h line)
Reactance of Overhead Line (with neighbouring o/h line)
(OP)
We have an O/H 3ph distribution line @ 72kV arranged with post top insulators. At a lower elevation, a horizontal crossarm is being used to carry a 3ph, 25kV line.
Now my question is: Will the 25kV line have an influence on the 72kV line reactance? How do I calculate the reactance of the 72kV line? The shield wire is right on the top of the pole and is common for both the 72kV & 25kV lines.
I am comfortable with the formula for 3ph line reactance with GMR and GMD values. Here since Ia = - (Ib + Ic), the equation gets reduced.
However, for the case above, since 25kV and 72kV lines are electrically separate, I am guessing that the 25kV line amp load will have an impact on the reactance of the 72kV line.
Any help on this issue is appreciated.
Now my question is: Will the 25kV line have an influence on the 72kV line reactance? How do I calculate the reactance of the 72kV line? The shield wire is right on the top of the pole and is common for both the 72kV & 25kV lines.
I am comfortable with the formula for 3ph line reactance with GMR and GMD values. Here since Ia = - (Ib + Ic), the equation gets reduced.
However, for the case above, since 25kV and 72kV lines are electrically separate, I am guessing that the 25kV line amp load will have an impact on the reactance of the 72kV line.
Any help on this issue is appreciated.






RE: Reactance of Overhead Line (with neighbouring o/h line)