Request: +,-, and 0 seq of double circuit lines

[Anonymous]

In the revised transmission line constants program, for a three phase line the program returns the positive, negative, and zero sequence resistance, reactance, and suceptance per circuit in the format used for load flow studies. This is a very useful feature which I have used to check my own "in-house" program for determining line constants.

It would be very useful, if the program could be modified, to output the zero sequence mutual impedances for three-phase double circuit lines.

Is this theoretically possible, and if so is there any likelyhood of this being implemented in the future?

[Craig Muller]

The Line Constants Program is undergoing a gentle makeover at the moment so many small things are being done to improve the output generation and viewing of this information within PSCAD. It should not be a problem to provide this type of information as you describe.

I will record your request in our tracking system and this way it should get into the next round of refinements. The refined program will be available in Beta form for testing purposes in the near future.

Thanks,

Craig.

[John Nordstrom]

Hi Ken,

What you are asking has already been implemented, along with the modified RXB data output. The 0 sequence mutual between two, double-circuit lines should be given in the output file if this is indeed your configuration.

The line constants will output the 0 sequence mutual if and only if:

Total # of phases = 6 AND:
total # of towers = 1 AND total # of circuits = 2 OR
total # of towers = 2 AND total # of circuits = 2

NOTE: The Universal Line Geometry component does not allow double circuit configurations. If you are using the ULG component, you must split the circuits manully by using two separate ULG towers.

Hope this helps!

Regards,