Coupled simulation of flow and dynamic analysis for prediction of the performance in GIS

Electrical energy transmission and distribution devices are becoming more sophisticated and diversified in design, and also higher in its capacity due to rising in electricity usage. In direct response to demands of more reliable GIS (Gas Insulated Switchgear) from customers, computer simulations such as dynamics, structural, thermal and fluid dynamics analysis are becoming more incorporated into the design process. Among the many types of simulations in GIS are low current interruption, SLF(Short Line Fault) interruption, and BTF(Bus Terminal Fault) interruption. In the simulations, a stroke profile measured under loaded condition is required, and it leads to reduction in time and cost required towards the product development before real experiments. In the paper, first, the actuator and interrupter of GIS is modeled using dynamics simulation program. Second, SF₆ gas pressure change in the interrupting chamber is modeled using flow simulation program. Finally, interface code for interaction between media were attained using common analysis program. When we use this co-simulation system, prediction of the performance and stroke of GIS can be understood before real experiments.