基于电气连通性分析的复杂配电网可靠性评估算法

针对含多级断路器保护和多个备用电源的复杂配电网,提出一种可靠性评估算法。首先建立简化节点网络模型,定义了供电路径和供电路径距离并给出供电路径连通的判定准则。然后根据配电网故障处理过程修改区域节点邻接矩阵,可快速计算供电路径距离并判断电气连通性和节点故障类型。最后计算区域和负荷点的可靠性指标以及系统指标。算法有效计及了各种开关故障和自动开关拒动的影响,计算准确快速易于编程实现。通过IEEE RBTS算例系统验证了该方法的正确性和有效性。

Complex Distribution Network Reliability Evaluation Based onElectrical connectivity Analysis

: A reliability evaluation method on complex distribution network is proposed, aiming at the distribution system with multi-grade breaker protections and multiple alternative supplies. At first,a simplified node network model is proposed,the power supply path and path distance are defined. Then the rule to determinate the electrical connectivity of the supply path is proposed. The zone node connection matrix is modified based on fault accident analysis of the distribution networks, and the power supply path distance can be calculated quickly based on the modified adjacency matrix to determine its electrical connectivity. Then the fault class of zone node is deduced by the connectivity of the power supply path and the reliability indexes of the nodes, the load points and the whole system can be calculated. It takes account of the effect of various switching devices and is as accurate as the FMEA method. It is fast and easy for programming. The correctness and effectiveness of the proposed method is verified by simulation results of wiring of feeder 4 in IEEE RBTS bus 6.