Abstract
The electric stress inside three-core belted cables is calculated using the charge simulation method combined with the method of imaging. Each conductor is simulated by Nc infinite line charges. An image charge for each fictitious charge is considered to keep the sheath potential at zero. The proposed method has the advantages that the charge values and hence the potential and field stress at any point are expressed as a function of the time wt which result in considerable saving in the computation time. Besides the computation time saving, the proper choice of the values of Nc and the assignment factor fs results in a high accuracy of the potential and field stress. The maximum potential error is shown not to be more than 0.05% and the field deviation angle is not more than 0.11° even when inter-conductor spacing is very small.
