基于系统功效的保护及控制系统可靠性评估

摘要

Two reliability indices, component availability and system availability, are illustrated. Reliability model of protection and control systems is created by a system effectiveness approach including hardware module, interface module, functional module and effective module. Typical functional events are demonstrated based on the effectiveness on the primary systems. And series-parallel method is used to quantitatively evaluate the reliability of protection and control systems. Components importance analysis is demonstrated in order to find the weak points and improve the reliability of the whole systems.%采用元件可靠度和系统可靠度两个可靠性指标,提出功效评估法:通过硬件模块、接口模块、功能模块、功效模块对继电保护及控制系统进行建模.针对二次系统对一次系统的产生的功效,提出一次系统的典型功能事件,并分别通过串并联网络法定量评估二次系统的可靠性.深入到元件层面对硬件模块进行重要度分析并重新排序,从而有针对性的发现系统薄弱环节,提高二次系统的可靠性.