Multiple section lines
Multiple section lines
(OP)
hi there.
i need to simplify/reduce a multiple sectioned line into a single equivalent line. How do i simplify/reduce these lines as to represent it as a single line with equivalent impedance? Also to bear in mind that i need 'eqivalent' zero and positive sequence impedances of this equivalent line. Is there a way to find the equivalents of the sequence components as well?
Can the equivalent parameters that i require be calculated? if so,how?
please assist.
thank you.
i need to simplify/reduce a multiple sectioned line into a single equivalent line. How do i simplify/reduce these lines as to represent it as a single line with equivalent impedance? Also to bear in mind that i need 'eqivalent' zero and positive sequence impedances of this equivalent line. Is there a way to find the equivalents of the sequence components as well?
Can the equivalent parameters that i require be calculated? if so,how?
please assist.
thank you.






RE: Multiple section lines
RE: Multiple section lines
RE: Multiple section lines
What type of line are you dealing with - transmission or distribution? Also, what length and voltage?
RE: Multiple section lines
RE: Multiple section lines
If you're just doing fault studies, then the series R + j X is fine for both transmission and distribution lines. If you have any significant amounts of underground cable, then its capacitance should be included.
RE: Multiple section lines
RE: Multiple section lines
If i came accross a T junction of a sectioned line, im assuming i should find the parallel equivalent impedance?
RE: Multiple section lines
If I understand what you're saying, if you have a T junction, where one branch goes off in one direction and the other in a different one, then you would not parallel them. You would maintain the series impedance of each separate path. Like:
X Y
- - - - - - - - - - -
|
| Z
- - - - - -
If you're interested in the fault at the right of section Y, then you would add the series impedance of X and Y.
Likewise, if you're interested in the fault at the end of Z, you'd combine the impedance of X and Z.
As I've drawn it, you would not parallel the impedance of Y and Y unless they came together at the ends.
RE: Multiple section lines