Multiphysics-Coupled Modeling: Simulation of the Hydraulic-Operating Mechanism for a SF6 High-Voltage Circuit Breaker

The paper describes a novel method for modeling the high-voltage circuit breaker (HVCB) with the hydraulic operating mechanism (OM) by mainly using lumped models. It incorporates electrical, magnetic, dynamic motion, fluid, mechanical, pneumatic, and thermal model into a multiphysics-coupled model. The aim of this study is to build a design model of an HVCB for studying the hydraulic OM. Simulation and experimental validations are implemented in a 550-kv HVCB. It proves that the coupled model can be applied to capture their dynamics with satisfying accuracy. This paper describes the main potentials of the coupled mode including quantifying important features and optimizing multiple objectives associated with the optimization tool. By including their coupling properties, the model is able to accurately predict and optimize the dynamic characteristics of the hydraulic OM.