摘要
换流变阀侧套管的载流连接结构由中心导杆、载流端子以及表带触指组成。为了研究单片表带触指接触电阻与其所受压力的关系,基于Greenwood和Williamson接触模型(G–W模型)推导出单片表带触指接触电阻与压力的关系式,引入表带触指受力偏转修正和接触区域表面轮廓修正,得到3种不同电极组合(紫铜–紫铜、紫铜镀银–紫铜镀银、铝合金镀银–铝合金镀银)下单片触指接触电阻与压力的关系。同时,开展试验验证触指的受力偏转现象,测量了不同电极组合下单片触指随压力变化的接触电阻。研究结果表明:接触电阻随压力增大而减小,当单片触指压力为5~9 N时,修正后计算值与试验值的相对误差在10%以内,验证了修正的准确性。该研究可为提高套管电连接可靠性提供参考。
The current-carrying connection structure of converter valve side bushing is composed of a coaxial copper rod,an aluminum rod and strap contacts.In order to study the relationship between the contact resistance and the pressure of a single piece of strap contacts,this paper deduced the relationship between them based on the Greenwood and Williamson contact model(G–W model),introduced the force deflection correction of the strap contact finger and the surface contour correction of the contact area,and got the relationship between the contact resistance and pressure of a single contact fin-ger under three different electrode combinations(namely,copper-copper,copper silver plated-copper silver plated,aluminum alloy silver plated-aluminum alloy silver plated).At the same time,experiments were carried out to verify the force deflection phenomenon of strap contacts,and the contact resistance of a single strap contact with pressure changes under different electrode combinations was measured.The research results show that the contact resistance decreases with the increase of pressure.When the pressure of a single strap contact is 5~9 N,the relative error between the calculated value and the experimental value after correction is within 10%,which verifies the accuracy of the correction.The re-search provides a reference for improving the reliability of the electrical connection of the bushing.
作者
刘鹏
任汀
谢韬
田汇冬
靳守锋
王青于
LIU Peng;REN Ting;XIE Tao;TIAN Huidong;JIN Shoufeng;WANG Qingyu(State Key Laboratory of Electrical Insulated and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;State Grid Economic and Technology Research Institute Co.,Ltd.,Beijing 102211,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2023年第3期1184-1193,共10页
High Voltage Engineering
基金
国家自然科学基金(52107163)
国家电网公司科技项目(SGLNDK00KJJS1900250)。
关键词
换流变阀侧套管
载流连接结构
表带触指
接触电阻
法向压力
G–W模型
converter valve side bushing
current-carrying connection structure
strap contacts
contact resistance
normal pressure
G–W model
