高压电器2026，Vol.62Issue(2)：33-41,9.DOI:10.13296/j.1001-1609.hva.2026.02.005
800 kV滤波器用断路器合闸电阻电热力多场耦合下性能评估
Performance Assessment of Closing Resistor for 800 kV Filter Circuit Breaker Under Electro-thermo-mechanical Multi-field Coupling
摘要
Abstract
The closing resistor plays an important role in suppressing the overvoltage and closing inrush current of fil-ter bank circuit breakers.However,with the increase in voltage,the failure rate of the closing resistor in 800 kV filter circuit breakers significantly rises.Currently,multi-field coupling simulations for the working environment of the clos-ing resistor are insufficient,and corresponding improvement measures have not been verified.In this paper various possible failure causes of closing resistor in filter circuit breakers are simulated and analyzed.The corresponding im-provement solutions are proposed and the improvement effectiveness is verified by simulation.The results show that under normal conditions the closing resitor is normal in electric field distribution and stable in operation.However,in case of abnormal conditions,local temperatures rise rapidly,potentially leading to concentrated thermal stress and af-fecting its performance.The common faults include the attachment of metal foreign objects to the surface of the resis-tor,wek coaxiality of the resistor disc and weak contact at the end faces.To address these issues,several optimization measures are proposed,namely,adding aluminum sheets between resistor disc to improve weak contact at the contact surfaces;adding aluminum blocks to the end resistor blocks to reduce stress concentration at the ends;and increas-ing the external surface diameter of insulation support and the outer sheath of the closing resistor stack to enhance the coaxiality of the resistor disc,thereby reducing electric field distortion and improving overall protection.Simula-tion results show that these optimization measures significantly enhance the performance of the closing resistor,reduce temperature rise and thermal stress and improve its safety and reliability,which are of significant importance for the simulation analysis and optimization design of closing resistor.关键词
合闸电阻/热应力/滤波器断路器Key words
closing resistor/thermal stress/filter circuit breaker引用本文复制引用
牛勃,蔡旭,马飞越,赵景禹,孙尚鹏,倪辉,刘涛,邓军波..800 kV滤波器用断路器合闸电阻电热力多场耦合下性能评估[J].高压电器,2026,62(2):33-41,9.基金项目
国家电网有限公司科技项目(5500-202335797A-3-8-KJ). Project Supported by Science and Technology Project of State Grid Corporation of China(5500-202335797A-3-8-KJ). （5500-202335797A-3-8-KJ）
