中国电机工程学报2026，Vol.46Issue(6)：2576-2586,中插33,12.DOI:10.13334/j.0258-8013.pcsee.242285
特高压直流输电用晶闸管大气中子辐照效应
Atmospheric Neutron Irradiation Effect of Thyristors in UHV DC Power Transmission
摘要
Abstract
Atmospheric neutron can induce single event burnout(SEB)in thyristors,which threatens the reliable operation of UHVDC power transmission projects in high altitude areas.In this paper,the Atmospheric Neutron Irradiation Spectrometer(ANIS)of China Spallation Neutron Source(CSNS)is used to obtain the experimental data of the thyristor under atmospheric neutron irradiation,and the method of processing the experimental data,the radiation fault characteristics,and the deterioration characteristics of the thyristor are discussed.It is found that the time to failure of thyristor satisfies the three-parameter lognormal distribution,based on which the time to failure and its confidence interval can be estimated.There is a SEB threshold voltage.When the applied voltage of the thyristor is less than the threshold voltage,the SEB will not occur even if the thyristor is exposed to radiation for a long time.The relationship between the failure rate and applied voltage under atmospheric neutron irradiation satisfies the Zeller's model and can also be described by a simple exponential model.It can also be obtained by fitting the data as a whole.The SEB failure rate under reverse bias voltage is lower than that under positive bias voltage.After neutron irradiation with a dose of 2.9×1010 n/cm2,the dynamic characteristics of thyristors change,with a 69%decrease in the stored charge of the pn junction,a 60.8%decrease in turn-on time,and a 36.4%increase in the maximum on state voltage.The research results of this paper can be used in the subsequent evaluation of atmospheric neutron irradiation failure rate and protection of converter valves.关键词
大气中子/特高压直流输电/晶闸管/中子辐照/单粒子烧毁/劣化Key words
atmospheric neutron/UHV DC power transmission/thyristor/neutron irradiation/single event burnout/deterioration分类
信息技术与安全科学引用本文复制引用
殷子强,李强,路敬宇,师凯,李鹏,胡志良,祝琳,丁卫东..特高压直流输电用晶闸管大气中子辐照效应[J].中国电机工程学报,2026,46(6):2576-2586,中插33,12.基金项目
国家电网有限公司科技项目(5500-202320184A-1-1-ZN). Science and Technology Project of State Grid Corporation of China(5500-202320184A-1-1-ZN). （5500-202320184A-1-1-ZN）
