HVDC cable design logic for digital computers

A computer program to achieve complete cable designs is under development, and the principal logic elements and equations being used are presented. The design of high-voltage, direct-current transmission cables insulated with oil-impregnated cellulose paper is constrained by the maximum temperature and the maximum steady-state and transient stresses that the cable insulation can reliably withstand over the desired operating lifetime. Because the electrical stresses in the insulation are related in a very complex fashion to temperature, applied voltage, and cable geometry, iterative techniques are required to compute the values of these stresses. The equations and logical framework presented provide the basis for an effective computer program for iterative computation techniques