基于节点电压相近度的黑启动子系统划分方法研究

互联电网发生大停电事故后，将电网划分成几个子系统实施并行恢复，可显著加快系统恢复进程。基于复杂网络的社团发现原理，采用节点电压相近度作为子系统划分的判据，提出一种黑启动子系统划分方法。该方法根据潮流计算的节点电压、黑启动电源的数目以及黑启动电源所在节点的电压获得电压阈值，将网络划分成几个子系统实施并行恢复，可满足子系统内部连续紧密、子系统之间联络的线路尽可能少且子系统的规模基本相当的分区目标。基于IEEE 118节点系统的算例验证了所提出方法的有效性。

Black-start subsystem partitioning based on similarity of nodes voltage

After a main blackout occurs in a large power system, partitioning the power system into several subsystems which are restored in parallel can accelerate the restoration procedure. In this paper, a system partitioning method based on communities finding theory of complex network is proposed for black-start restoration, using similarity of the node voltages as the partitioning criterion. In the proposed method, by determining the voltage thresholds for network partitioning according to the black-start units and their node voltages from power flow calculation, the power system can be partitioned into several subsystems restored following the strategy of stepping up from zero. The obtained subsystems satisfy the partitioning requirements, that is, the nodes in a same subsystem are tightly inter-linked, the nodes in different subsystems are sparsely inter-linked, and all the subsystems have similar sizes. The effectiveness of the proposed method is validated by an application example on the IEEE 118-bus power system.