继电保护装置单粒子效应的测试方法与失效率研究

单粒子效应引发的存储器软错误对微机继电保护具有不可忽略的影响。介绍了α粒子和高能中子的来源，以及中国部分城市的大气中子通量。讨论了对继电保护装置进行中子辐照试验的方案细节，以及根据实验数据求取现场环境下单粒子失效率的方法。从现有可靠性指标出发，推导得到继电保护装置单粒子效应的可接受失效率。将该指标和辐照试验得出的失效率相比较，可以判断装置是否满足现场运行要求。该方法对评价继电保护装置的单粒子失效率具有一定的参考意义。

Test method and failure rate of the single-particle effect of a relay protection device

Memory soft errors induced by the single-particle effect have a non-negligible effect on microcomputer relay protection. This paper introduces the sources of Alpha particles and high-energy neutrons, as well as atmospheric neutron fluxes in some cities in China. The details of the neutron irradiation tests on relay protection devices and the method of obtaining the single particle failure rate in the field environment based on experimental data are discussed. Based on the existing reliability metrics, the acceptable failure rate of the single-particle effect of the relay protection device is promoted. Comparing this indicator with the failure rate obtained by the irradiation test, it can be judged whether the device fulfills the requirements of field operation. This method has a certain reference significance for evaluating the failure efficiency of single particles of relay protection devices.This work is supported by the Key Scientific and Technological Project of China Southern Power Grid Corporation (No. ZDKJXM20200056).