Modeling and Simulation Aspects of Transient Electromagnetic–Mechanical Analysis for Industrial Applications

For the development and optimization of power system components that are subjected to high short-circuit currents, such as generator circuit breakers (GCBs) and insulated phase bus ducts, an accurate, robust, and efficient methodology for performing a 3-D transient electromagnetic-mechanical analysis is of paramount importance. The purpose of this paper is to present numerical and modeling aspects of the analysis that are decisive for the accuracy and reliability of the results. The efficient and robust 3-D approach based on Biot-Savart integration for evaluating the electromagnetic force density over electrically conductive domains, the 3-D magnetostatic approach based on the A-field formulation including an air box, and the 3-D eddy-currents approach based on the A-$\varphi $ -field formulation are compared in order to evaluate the importance and relevance of magnetic bodies consideration (structural steel components) in terms of electromagnetic force and induced eddy-currents for daily design of GCBs.