Equivalent single-layer power cable sheath for transient modeling of double-layer sheaths

Frequency-domain transient analysis in double-circuit mixed HV overhead line-cable connection including cross-bonding

“…However, the gain in execution speed gradually decreases, because more frequency components in Equations (11), (12) and (13) have to be evaluated. Reference [26] applies the proposed concept with frequencies up to 500 kHz. Optimisation of the algorithms, e.g.…”

“…For modelling, the actual cable is represented by four equivalent parts (Table I): core conductor, cable insulation, earth screen and outer insulation [3,6,25,26]. For modelling, the actual cable is represented by four equivalent parts (Table I): core conductor, cable insulation, earth screen and outer insulation [3,6,25,26].…”

“…Each of the in total 12 underground cables consists of six parts: conductive core with stranded copper wires, semi-conductive layer, XLPE insulation layer, semi-conductive layer, conductive screen layer and PE outer sheath layer. For modelling, the actual cable is represented by four equivalent parts (Table I): core conductor, cable insulation, earth screen and outer insulation [3,6,25,26]. The cable length is 10.8 km and comprises 28 segments with different lengths and trench types grouped into 12 minor sections (MS01-MS12) (Figure 2; Tables II and III).…”

“…In the present application, the number of frequencies is relatively low, and the applied DFT is only a minor fraction of the total computation time. This can be different when opting for higher frequencies as in [26].…”

Transient modeling and sensitivity analysis of cable system parameters

“…However, for this analysis the model adopted comprises of four equivalent layers; core conductor, XLPE insulation, screen and outer sheath. The detailed configuration and parameters of the OHLs and cable as well as the derivation of the equivalent layers can be found in [1], [2] and [5]. The cable design parameters are also shortly described below:…”