Coupled simulation of gas flow and dynamic analysis for stroke calculation in circuit breaker
Y.S. Lee, H.S. Ahn, S.W. Park, J.H. Lee, 1st International Conference on Electric Power Equipment – Switching Technology (ICEPE-ST), Xi’an, October 2011, pp 203-206.
Abstract
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, 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 interruption, and BTF 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. In the paper, first, the actuator and interrupter of GIS is modeled using dynamics simulation program called RecurDyn. Second, SF6 gas pressure change in the interrupting chamber is made into a sub-routine using house code. Finally, with consideration of ODP (Oil Dash Pot) and friction forces of actuator, stroke profile under actual loaded condition is calculated.
How Multibody Dynamics Simulation Technology is Used
The actuator and interrupter of a gas insulated switchgear are modeled using RecurDyn. The results of this study are expected to be helpful to improve the efficiency and structural reliability of ultrahigh-voltage GIS circuit breakers early in development. This is expected to shorten the period of research and development and reduce test costs.
