蜂巢状有源配电网拓扑及其可靠性评估

为探寻适应分布式电源并网运行的高供电可靠性配电网结构，文章提出了一种基于分布式有源微网的蜂巢状有源配电网拓扑。首先，对该拓扑结构及其中的有源微网与智能功率/信息交换基站进行了介绍，并分析了该拓扑的优点与不足。其次，应用马尔可夫链分析蜂巢状微网的状态转移过程，并给出了数学模型，包括状态转移概率矩阵和不同状态下的概率计算方法等。然后，推导了基于最小割集法的蜂巢状微网可靠性指标计算的修正公式。最后，以IEEE-RBTS BUS6 F4测试系统为例，对其“改造”成蜂巢状微网前后的供电可靠性进行了仿真比较，结果表明“改造”后的蜂巢状微网具有更高的供电可靠性，进而得出了蜂巢状有源配电网的供电可靠性明显优于普通配电网的结论。

Topology and Reliability Evaluation of Honeycomb Active Distribution Network

In order to explore the structure of distribution network with high power supply reliability and adaptive to the operation of distributed generators， our research group proposed a honeycomb topology for active distribution network on the basis of distributed active microgrids. Firstly， this paper makes a brief introduction of the topology and active microgrids and smart power/information exchange base stations in the topology；and advantages and disadvantages of the topology are also analyzed. Secondly， the Markov chain is used to analyze the state transition process of the honeycomb microgrid， and the mathematical models are given， including the state transition probability matrix and the probability calculation method under different states. Thirdly， revised formulas based on the minimum cut set method for calculating the reliability indices of the honeycomb microgrid is derived. Finally， the IEEE-RBTS BUS6 F4 test system is taken as an example， power supply reliability of the system before and after “transformation” into honeycomb microgrid is simulated and compared， and the result shows that the system has higher power supply reliability after “transformation”；furthermore， the power supply reliability of honeycomb active distribution network is obviously better than the ordinary distribution network.