考虑转供容量约束的配电网马尔可夫可靠性算法

Markov reliability algorithm for distribution network considering the alternative supply capacity limitation

将马尔可夫理论应用于配电网的可靠性评估中,将一台虚拟的故障主变和一条虚拟的故障线路作为负荷失电时候的状态,视为当供电线路故障,并且转供不成功的情况下,状态转移至由这条虚拟的故障线路供电。利用主变和线路间的联络关系,充分考虑了系统发生N-1故障时的转供成功率,并且综合了系统的元件故障率,形成马尔可夫转移概率矩阵。采用经典的马尔可夫状态空间法,准确全面且简便地求解配电网的可靠率,并通过一个实际的配电网络算例验证了算法的可用性。

Markov theory is applied to the reliability evaluation of distribution system.A virtual fault transformer and a virtual fault outgoing line are considered to be the situation of load losing power.When the power supply line is in fault and the load transfer fails,the state is transferred that this virtual line will supply the power.Considering the element failure rate and the transfer success rate when N-1 fault happens,Markov transition probability matrix is formed by using the relationship between outgoing lines and transformers.Adopting the classical Markov state space method,distribution network reliability is accurately,comprehensively and simply solved.A real distribution network shows the availability.