550 kV快速接地开关新型自力型触头设计与计算

Design and Calculation of New Type Self-Elastic Contact for 550 kV High-Speed Earthing Switch

针对接地开关常用梅花触头结构复杂、安装困难、成本较高等缺点,设计了新型自力型触头结构。通过增加压紧弹簧来提高接触压力,利用自身的高导电性和可靠的接触压力,提高耐受短路电流产生的电动力能力。采用有限元分析和理论计算对触指进行优化,计算触头接触压力,并对动热稳定性以及短路关合能力进行校核,确保了新型自力型触头设计合理性。

This study designs a new self-elastic contact structure to solve the shortcomings of plum blossom contacts,such as complex structure,complex installation,high cost,etc.It increases the contact pressure by adding a compression spring,and uses its own high conductivity and reliable contact pressure to improve the electrodynamic ability to withstand short-circuit current.It increased the contact pressure by adding a compression spring and used its high conductivity and reliable contact pressure to improve the electric power capability generated by the withstand short-circuit current.This paper also used finite element analysis and theoretical calculation to optimize the contact finger,calculated the contact pressure of the contact,and verified the dynamic and thermal stability and short-circuits closing capability to ensure the rationality of the new self-supporting contact design.