冗余控制系统性能指标研究
Study of Performance Indicator of the Redundant Control System
王公展 1尚宪和 1刘欣平 2高江波1
作者信息
- 1. 中核核电运行管理有限公司,浙江 海盐 314300
- 2. 福清核电有限公司,福建 福清 350318
- 折叠
摘要
目前冗余控制系统普遍采用的可靠性指标是基于指数分布计算的指标,但是计算得到的可靠性和平均无故障时间不能直观代表系统的风险水平,因为它们没有反映出冗余控制系统后果性的事件双机同时失效概率.本研究从概率角度出发,推导出冗余控制系统同时失效概率和时长计算公式,并通过蒙特卡罗方法验证了计算公式的正确性.最后,根据某核电厂的实际电厂控制计算机历史失效数据,计算了新的指标,并与传统的指标进行了比较.结果证明冗余控制系统同时失效概率更具有代表性,更适合作为冗余控制系统的性能指标.
Abstract
Currently,the calculation of reliability indicator of the redundant control system is based on the potential distribution.However,the result of reliability and mean time between failures could not represent the risk level of the system directly,as they could not reflect the probability of the consequential event of simultaneous dual failure of the redundant control system.To evaluate the overall reliability and the risk of the redundant control system.From the viewpoint of probability,this paper derives the formular of calculation of the simultaneous dual failure probability of the redundant control system,validates the formular with the Monte Carlo method.In the end,the historical failure data of plant control computers of a nuclear power plant are used to calculate the new indicators and compared with the traditional indicators.The result shows that the simultaneous dual failure probability is more representative and more appropriate to use it as the performance indictor of the redundant control system.
关键词
性能/指标/冗余/控制/可靠性Key words
performance/indicator/redundant/control/reliability引用本文复制引用
出版年
2024
NETL
NSTL
万方数据