考虑无功的电力信息物理系统关键线路辨识

线路中无功功率的分配改变，可能会影响关键线路的分布。文章以传输介数和改进的潮流转移熵为计算手段，同时考虑了有功和无功，以这些因素为基础提出了线路综合关键度。关键线路的断开使得电网的连通性变差，为维持系统稳定，电力系统需要切除部分负荷，故文章使用基于最优潮流的失负荷量验证辨识方法的准确性。将IEEE39节点系统作为物理电网模型，计算得出关键线路排序。并从信息系统攻击使得电网线路发生故障，采用基于最优潮流的失负荷量验证上述算法的有效性。结果表明线路综合关键度可以较为准确地辨识出关键线路。

Identification of Key Lines of Power Cyber-physical System Considering Reactive Power

The distribution of key lines may be affected by changes in the distribution of reactive power in lines. The comprehensive criticality of the line was proposed in this article based on the transmission betweenness and the improved power flow transfer entropy used as the calculation methods, and the active and reactive power considered at the same time. The connectivity of the power grid can be made worse by the disconnection of key lines and part of loads need to be removed in order to maintain the stability of the system. Therefore, the accuracy of the identification method was verified by the loss of load based on the optimal power flow. The key line sequence of the IEEE39-bus system which used as a physical power grid model was calculated. And the load loss based on the optimal power flow was calculated after there were faults caused by the information system attacks in the power grid line, which was used to verify the effectiveness of the above algorithm. The results show that the critical routes can be identified more accurately by the comprehensive criticality of the line.