电力系统可靠性评估的共模故障模型研究

共模故障是电力系统可靠性评估中常见的一种故障模式。针对传统共模故障模型的不足,提出了2种新的共模故障模型,即独立模型和容量模型。利用这2种模型,可分别公式化求得系统各个状态和各个容量水平的可靠性指标,结果准确,求解速度快。最后,对3种模型各自的优缺点进行分析和比较,由所提2种模型求得的可靠性指标是准确的,两者在理论上也是等价的,所得结果对电力系统可靠性评估有一定的指导意义。

Study on common mode failure models in power system reliability evaluation

Common mode failure is a frequently occurred fault mode in the power system reliability evaluation. Two models of the common mode failure,named as'individual model' and 'capacity model',are presented to overcome disadvantages of traditional models. Formularized reliability indices of each state and each capacity level can be evaluated quickly and accurately by using proposed models. Differences among these three models are also discussed. As a result,reliability indices calculated by two proposed models are correct and equal in theory,which are somewhat useful for the power system reliability evaluation.