基于严重区域的多PCC点暂降频次估计

提出一种基于严重区域概念的多PCC点的暂降频次估计方法。基于解析法分别确定电网中多个PCC点的暂降域,根据多个暂降域的交集对节点和线路进行严重区域分级;根据不同等级严重区域内节点和线路发生故障导致多个PCC点的暂降频次,以及每个节点和每条线路故障对总暂降频次的贡献度,对全网所有节点和线路进行严重程度排序。对IEEE-14节点系统仿真,验证了方法的正确性和适用性,并指出对于不同严重程度的线路应采取不同措施,以减少抑制暂降的花费。

Voltage Sag frequency Estimation Considering Multiple PCC Points Based on Area of severity

This paper proposed a method of voltage sag frequency estimation considering multiple PCC points based on area of severity concept. Exposed areas of multiple PCC points are determined based on analytical approach. Then buses and lines are graded into different areas of severity according to the intersection of exposed areas. The severity of buses and lines is ranked considering sag frequencies of multiple PCC points caused by faults in the different areas of severity, and the contribution degree to the total frequencies of faults in each bus or line. Case study for IEEE-14 bus test system confirms its validity and feasibility and proves that different measures should be taken to lines with different severity in order to reduce spending of suppressing sags.