Computation of Overhead Line/Underground Cable Parameters with Improved MoM-SO Method

Electromagnetic Transients Program: History and Future

“…If necessary, one can adopt the approximate formula in a closed form to consider the proximity effect together with the skin effect in a conductor internal impedance [75], or MOM‐SO (Method of Moment Surface Operator) can be adopted [76–80].…”

“…Recently, an approximate NEA method based on MOM in the frequency domain has been applied to calculate line/cable parameters [69,74,76–80]. A 2D MOM in Ref.…”

“…[53]. Refs [69,74,76–80] proposed MOM‐SO, which is a kind of a hybrid approach of a circuit theory and MOM. To calculate the conductor internal and earth‐return impedances, the same formulas as those by Schelkunoff [22] and Pollaczek [23] are adopted in the form of Green's functions.…”

“…[74,76–78] shows numerical instabilities at low‐ and high‐frequency ranges as described in Ref. [80]. As MOM‐SO is based on the circuit theory, the calculated impedance and admittance are in ‘pul’, and it cannot deal with an arbitrary cross‐section conductor and finite‐length/nonuniform conductors.…”