摘要
介绍了典型的核电站数字化仪控系统的系统结构和系统设计中所采用的各种高可靠性技术,并采用系统可靠性框图的方法对系统的可靠性和可用性进行了分析和计算。该方法将仪控系统划分为现场控制层、系统服务层、监测控制层等子系统,通过对系统自顶向下逐层分解得到系统的可靠性框图,然后计算出整个系统的可靠性参数。计算结果表明,通过采用适当的可靠性设计措施,系统能够满足高可靠性和可用性要求。
The typical systematic architecture of I&C systems in nuclear power plant and various high reliability technologies used in system design are introduced. The reliability and availability of the system are analyzed and calculated by adopting the reliability block diagram of the system. With this method, the I&C systems are divided in subsystems of field control layer, system service layer, and monitoring control layer, etc.;through hierarchical decomposition of the system from top to bottom, the reliability block diagram of the system is obtained; then the reliability parameters of overall system can be calculated. The results of calculation indicate that by using appropriate reliability design measures, the requirements of reliability and availability of the system can be satisfied.
出处
《自动化仪表》
CAS
2015年第11期127-132,共6页
Process Automation Instrumentation
关键词
核电站
仪控系统
传感器
现场控制层
PLC
可靠性
冗余
平均故障间隔
Nuclear power plant Instrument and control system Sensor Field control layer PLC Reliability Redundancy
Mean time between failure
