分布式电源对配电网供电可靠性的影响

大量分布式电源接入电网，给传统的配电网规划带来了实质性的挑战。当馈线上发生故障时，电网会出现孤岛运行的运行方式。针对该情况，在综合分析配电系统可靠性指标及模型的基础上，采用基于广度和深度搜索相结合的控制网闭合环自动搜索算法，快速求得最优的孤岛划分方法。并结合孤岛运行的方式，提出了“改进最小路结合区间运算”算法，同时为了防止过估现象，引入反演公式，使评估结果更加符合配电网运行的实际情况。通过对IEEE-RBTS BUS6系统主馈线F4算例的分析及计算，验证了数学模型的合理性和科学性。

Effect of Distributed Generation on Power Supply Reliability of Distribution Network

As a large number of distributed power grid，this has given a substantive challenge to the traditional distribution network planning. When failure occurs in a feeder，the operation of the power grid will be an island. Aiming at this situation，in comprehensive analysis on the basis of power distribution system reliability index and model，use the algorithm which based on the breadth and depth of the search network which combines closed-loop automatic search algorithm，fast and optimal Islanding strategies.And according to the operation of the island，presents an improved algorithm of minimal path using interval arithmetic. To prevent excessive estimate of phenomena，the introduction of the inversion formula，make assessments more in line with the actual situation operation of distribution network. Through the main feeder F4 IEEE-RBTSBUS6 system analysis and calculation of numerical examples，verify the mathematical model of rationality and science.