一种大规模配电网实时重构新方法

提出了一种利用最小树算法和开关交换方法进行大规模配电网重构的新方法。该方法首先利用最小树算法对配电网进行初步重构，重构的结果基本接近最优解，然后利用开关交换方法在最小树初步重构的基础上进行精确重构，最终得到最优解或近似最优解。在最小树初步重构过程中，采用了简化潮流计算方法、近似网损计算方法和只对受影响电路进行潮流计算的方法，使得初步重构的耗用时间大大减少。在开关交换重构中采用了精确潮流计算，保证了最终得到最优解或近似最优解。此外，为了建立适于配电网重构的拓扑关系，文中介绍了配电网图的形成方法。实际系统的算例测试结果表明，该方法效率高，重构效果明显，能够适用于大规模配电网的实时网络重构。

A NEW REAL-TIME RECONFIGURATION APPROACH TO LARGE SCALE DISTRIBUTION SYSTEM

A new real-time reconfiguration approach for large-scale distribution system, based on the minimum spanning tree algorithm and the switch exchange method, is presented. First, the approach reconfigures the distribution system preliminarily using the minimum spanning tree algorithm and the reconfiguration result is close to the optimal solution. And then, the switch exchange method is used to reconfigure the distribution system accurately to obtain the optimal or near-optimal solution based on the first step. In details, for the simplified power flow calculation method and the approximate power loss calculation method are adopted in the first configuration and the power flow calculation is only performed to the affected circuit, the time consumption is very little. At the same time, the accurate power flow,calculation is used to guarantee the optimal or near-optimal solution in the switch exchange reconfiguration. Also, the method of forming distribution system graph is introduced. The test results of a real distribution system indicate that the proposed approach has high efficiency and good reconfiguration result. The application to real-time reconfiguration for large-scale distribution system is feasible.