船舶常规电站主开关跳闸的故障树分析

Fault Tree Analysis for the Tripping of the Circuit Breaker in Normal Power Plant of Ship

分析主开关的结构,建立船舶常规电站主开关跳闸的故障树模型,找出主开关跳闸所有可能的故障模式并进行了定性分析与定量分析,得出了底事件依结构重要度的排序;根据实际情况,对底事件的概率重要度与关键重要度进行说明;明确影响系统可靠性的最薄弱环节,提出提高系统可靠度的建议。

The structure of the circuit breaker was analyzed to establish the fault tree model of the tripping of the main switch in normal power plant of ship. All of the possible failure modes of the cireuit breaker were found out and studied qualitatively and quantitatively. So the list of the bottom events in order of the structural importance was obtained. The probability importance indexes and the key importance indexes of the bottom events were illustrated according to the reality. The weakest item reducing the reliability of the system was determined and several suggestions for improving the reliability of the system were presented.