Reliability Evaluation of NPP's Power Supply System Based on Improved GO-FLOW Method
Reliability Evaluation of NPP's Power Supply System Based on Improved GO-FLOW Method
复制标题
基于改进GO-FLOW法的核电厂供电系统可靠性评估
DOI：
10.1155/2016/1245387
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发表时间：
2016
影响因子：
1.1
通讯作者：
Lei Yong
中科院分区：
文献类型：
--
作者：
Zhao Jie;Liu Tian;Zhao Yu;Liu Dichen;Yang Xiaodong;Lin Yi;Lin Zhangsui;Lei Yong
核电站供电系统是可修复的，各部件之间存在共因故障。在改进的GO - FLOW方法中，引入了修复率，并考虑了总信号，对核电站供电系统进行了可靠性分析。传统的GO - FLOW算子算法得到了改进。综合考虑供电系统总信号流的影响，建立了多模态可修部件的等效可靠性参数模型和共因失效概率模型。建立了改进的核电站供电系统GO - FLOW模型。在此基础上，计算了构件的可靠性参数。模拟分析了核电站场外电源和供电系统三十年来故障概率的时变趋势。通过与动态故障树分析方法的计算结果对比，验证了改进GO‐FLOW方法的有效性和简便性。通过仿真算例验证了改进的GO - FLOW模型在核电厂供电系统中的有效性和适用性。
NPP’s power supply system is repairable and there is common cause failure between the components. The repair rate is introduced and total signaling is considered in the improved GO‐FLOW method, aimed at reliability analysis for NPP’s power supply system. Traditional GO‐FLOW operators’ algorithms are improved. Comprehensively considering the effect of total signaling flow in the power supply system, the equivalent reliability parameter model and common cause failure probability model of multimodal repairable components are constructed. The improved GO‐FLOW model of NPP’s power supply system is set up. Based on the proposed model, components’ reliability parameters are computed. The failure probability time‐varying trend in thirty years, respectively, of NPP’s offsite power source and power supply system, is simulated and analyzed. Compared with calculation results of dynamic fault tree analysis method, the validity and the simplicity of the improved GO‐FLOW method are verified. The effectiveness and applicability of the improved GO‐FLOW model for NPP’s power supply system are proved by simulation examples.