Analysis of mutual electromagnetic influences between adjacent triplets of high-current generator busducts in HPP Zakucac
Abstract
The paper develops a mathematical model for the analysis of electromagnetic effects of close triples of generator shielded lines. The model in question takes into account the complex electromagnetic coupling between triples of single-pole insulated shielded generator lines (of circular cross-section). The influence of proximity and skin effect are also taken into account. The influence of mutual short-circuiting of the shields of each triple of shielded lines and their grounding (at only one or both ends) on the distribution of the associated currents (eddy and/or circular currents) in the shields as well as the occurrence of shield voltages towards the ground/earthing conductor was analyzed. The associated power losses of the shielded lines were also calculated, as well as the accompanying current and voltage states that occur in a short circuit. The most favorable method of treating the shield (grounding and short-circuiting) was defined with respect to power losses and expected shield voltages towards the ground/earthing conductor.
