Methods Of Calculations Of Field Stresses In A Three-Core Power Cable

A numerical method using the charge simulation technique with only a small number of line charges is developed to calculate the electric field everywhere in a three-core high voltage, high power belted cable. Only six line charges are used of which three lines represent the three conductors and three image line charges to take account of the grounded sheath. The locations of the maximum electric stress in the cable are determined. Experimental measurements is also carried out using an electrolytic tank to verify the calculations. Good agreement is obtained. The results are presented in a normalized format so that they can readily be applied.