基于断线扰动的电压控制区域边界节点修正方法

电压控制区域(Voltage Control Area, VCA)之间具有弱耦合性，修正VCA能够提升区域内电压变化的一致性，从而优化电网分区结果。传统分区修正法存在计算量大、PV节点归并缺乏理论依据等问题。因此，提出了一种修正VCA边界节点的方法，可以有效减少分区修正的计算量。所提方法采用小元素去除法得到各阈值下的电网划分结果，以Q-V曲线为判据选取各划分结果中最佳阈值对应的准分区。基于区域间的弱耦合性，采用所提方法修正准分区，得到优化后的分区结果。所提方法针对准分区的边界节点进行断线修正，并采用平均电气距离归并剩余的PV节点，不仅能减少分区修正的计算量，而且为各区域无功源的合理分配提供了理论依据。以新英格兰10机39节点系统为算例，通过仿真分析验证了所提方法的有效性。

A method for correcting boundary nodes of a voltage control region based on disconnection disturbance

The voltage control area (VCA) has weak coupling, and correcting the VCA can improve the consistency of voltage changes in the area, thereby optimizing the results of grid partitioning. The traditional partition correction method has problems such as requiring a large amount of calculation and lack of a theoretical basis for PV node merging. Therefore, this paper proposes a method to correct the boundary nodes of the VCA, one which can effectively reduce the calculation for the partition correction. The proposed method uses small element removal to obtain the grid division results under each threshold, and uses the Q-V curve as the criterion to select the quasi-division corresponding to the best threshold in each division result. Based on the weak coupling between regions, the proposed method is used to correct the quasi-partitioning, and the optimized partitioning results are obtained. The proposed method performs disconnection correction on the boundary nodes of the quasi-partition, and uses the average electrical distance to merge the remaining PV nodes after correction. This not only reduces the calculation for the partition correction, but also provides a theoretical basis for the rational allocation of reactive power sources in each area. The effectiveness of the proposed method is verified by simulation analysis of 10 machines and 39 nodes in New England. This work is supported by the Management Science and Technology Project of the Headquarters of State Grid Corporation of China (No. 5108-202135033A-0-0-00).