基于最小割序集的独立电力系统可靠性分析

故障树分析方法是对系统进行可靠性评估的有效方法,但在独立电力系统可靠性的计算中存在可靠性参数计算量大、求解困难等问题。对此,采用故障树最小割序集方法求解独立电力系统的可靠性指标,针对求解可靠性指标时存在的组合爆炸问题,提出了基于时间运算符求解最小割序集的方法。运用分层模块的方法简化动态故障树模型,并根据最小割序集的逻辑运算规则得到最小割序集。最后运用失效概率公式求解得到独立电力系统的可靠性指标。以某常规独立电力系统和B787飞机电力系统可靠性分析为例,验证了所提算法的可行性和正确性,为求解独立电力系统的可靠性指标提供了一种新的思路。

Reliability analysis of independent power system based on minimum cut sequence set

The fault tree analysis is an effective method for reliability evaluation of the system. However, there are problems in the reliability calculation of independent power systems, such as the reliability parameters have large amount of calculation and are difficult to be solved. Thus, the fault tree minimum cut sequence set method is used to solve the reliability index of the independent power system. For the combinatorial explosion problem in the calculation of the reliability index of the sys tem, a time-based operator is proposed to solve the minimum cut sequence set. In this way, the hierarchical module is used to simplify the dynamic fault tree model, and the minimum cut sequence set is obtained according to the logical operation rules of the minimum cut sequence set. Finally, the failure probability formula is used to solve and obtain the reliability index of the independent power system. Taking the reliability analysis of a conventional independent power system and B787 flight power system as an example, the feasibility and correctness of the proposed algorithm are verified, which provides a new idea for solving the reliability index of the independent power system.