直接计算静态电压稳定裕度的改进崩溃点法

Improved point of collapse method for direct calculation of static voltage stability margin

针对传统直接法的收敛性容易受初始值影响以及传统崩溃点法(POC)无法计算极限诱导分岔(LIB)点的问题,提出一种改进POC。改进后的算法根据电力系统的特点修改迭代过程和特征向量范数设置方法,使其对初始值的敏感度降低。基于改进方法的特殊收敛性,提出一种计算LIB点的方法。IEEE 14节点系统和IEEE 118节点系统算例结果验证了所提方法的有效性。

Aiming at the problems that the convergence of the traditional direct method is easily affected by the initial value and the traditional POC(Point Of Collapse method)cannot calculate the LIB(Limited Induced Bifurcation)points,an improved POC is proposed,which modifies the iterative process and the setting method of eigenvector norm according to the characteristics of power system,so that its sensitivity to the initial value is reduced.Based on the special convergence of the improved method,a method is proposed to calculate the LIB points.The case results of IEEE 14-and 118-bus systems verify the effectiveness of the proposed method.