可靠性评估中多重故障算法的研究

针对精确地考虑多重故障的影响遇到的“维数灾”困难 ,提出了基于元件持续时间抽样方法 ,将多重故障评估转换为单重故障评估 ,利用存储系统状态和状态评估结果来减少需要评估的系统状态数 ,既实现了精确评估多重故障的影响 ,计算量增加又不大。在单重故障评估中 ,基于灵敏度分析的负荷控制策略 ,保证任何系统状态下单重故障潮流计算收敛 ,使多重故障能够顺利转换成单重故障计算。通过IEEE- RTS算例计算表明 ,算法是可信和有效的。

Multiple fault assessment algorithm for reliability evaluation

Multiple faults affect the reliability indices in large power systems. An efficient algorithm is developed for multiple fault assessment based on the component state duration sampling approach (CSDSA), where the multiple faults are transformed into the single fault to accelerate the calculation. Also the sampling state and the load curtailment are recorded to avoid re evaluating the same system states. The load curtailment strategy based on sensitivity is presented in the single fault assessment. Evaluation of The IEEE RTS using the algorithm shows that the algorithm is more accurate and efficient.