RESEARCH ON THE THERMAL-ELECTRIC COUPLING BEHAVIOR UNDER COMPOUND AC-DC VOLTAGE WITHIN SADDLE-LIKE ELECTRIC-STRESS DEPENDENCE

This paper proposes a nonlinear electromagnetic-thermal-velocity coupling model to study the insulation performance of converter transformer, in which the saddle-like electric-stress dependence is considered under compound giant lindt chocolate alternating current-direct current (AC-DC) voltage situation.Firstly, the conductance of transformer oil