安全仪表系统在锅炉保护中的设计与实现  

Design and Implementation of Safety Instrumented Systems in Boiler Protection

作　　者：刘华[1] 

机构地区：[1]国核电力规划设计研究院,北京100095

出　　处：《自动化仪表》2016年第11期58-61,65,共5页Process Automation Instrumentation

摘　　要：为满足安全仪表系统在某国外电厂保护系统的应用需求,提出了一种锅炉保护系统(BPS)的设计方案。该方案采用危险和可操作性方法确定BPS所需的整体安全性等级,按照IEC国际标准确定BPS中控制器及仪表的冗余性,选用可靠性框图法校验BPS的危险失效概率,并结合校验结果对BPS系统进行修正。实践表明,该设计方案能有效提高锅炉保护系统的可靠性,同时避免过度冗余。To meet the requirements of safety instrumented system applying in the protection system of one certain foreign power plant, a design plan of boiler protection system BPS is proposed. In the plan, the HAZOP method is used to determine the SIL needed for boiler protection system, IEC standards are followed to determine the redundancy of the controllers and instruments in BPS, and reliability block diagram method is used to check the PFD of BPS,which in turn is used to modify the BPS. The practice shows that the design plan can effectively improve the reliability of boiler protection system, and avoid excessive redundancy.

关 键 词：安全仪表系统(SIS) 分散控制系统(DCS) 锅炉保护系统(BPS) 危险和可操作性方法(HAZ0P) 整体安全性水 

分 类 号：TH7[机械工程—仪器科学与技术] TP277[机械工程—精密仪器及机械]