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No sequence shared impedance for subterranean cables
No sequence mutual impedance for subterranean cables
Analysis of sequence impedance of 345 kV cable systems with special bondings using ATP. An instance of double-circuit cable lines is used to study the feature of parallel multi-circuit cable. Operation of the network. These analyses and studies require sequence impedances or currents as input data. The sequence impedance / current calculation of overhead lines is well known and introduced in textbooks 4. For underground cables, theoretical formulas are proposed for the cable itself 5-8. In order to derive accurate theoretical.
Hello to everyone. I possess been searching for the zero sequence shared impedance equation for subterranean cables for a even though. I feel conscious that this equation is available for over head cables but does it therefore furthermore for the subterranean cables? If not really, how can I reach a logical outcome from existing recipes?
For situations;
There can be a system is made up of 2 circuits which have got 3-phase cables individually.
- Can I make use of the self impedance formulation for each cable connection individually and after that shared impedance formulation for 1 signal and in the finish mutual impedance method for 2 circuits?
- Should I think about the images of the cabIes above the ground?
- I in fact need three values;
. B/w cable connection - wire
. B/w wire - globe
. M/w conductor - sheath
Thanks a lot in advance for you helps.
For situations;
There can be a system is made up of 2 circuits which have got 3-phase cables individually.
- Can I make use of the self impedance formulation for each cable connection individually and after that shared impedance formulation for 1 signal and in the finish mutual impedance method for 2 circuits?
- Should I think about the images of the cabIes above the ground?
- I in fact need three values;
. B/w cable connection - wire
. B/w wire - globe
. M/w conductor - sheath
Thanks a lot in advance for you helps.