由于极限诱导分岔点处的潮流雅可比矩阵非奇异,因此电压稳定裕度对参数灵敏度的计算存在困难。对此,采用分岔点处参数灵敏度计算的新方法,只需求解一个左端系数阵为扩展潮流雅可比矩阵的线性方程组,进而提出了包含极限诱导分岔点在内的静态电压稳定最小负荷裕度计算方法。该方法结合负荷增长模式及其波动形式,建立了连续潮流模型和求取最小负荷裕度的优化模型。IEEE 118节点系统的仿真算例验证了所述方法的简单有效性。
It is difficult to calculate the parameter sensitivity of voltage stability margin at LIB(Limit Induced Bifurcation) point because of its nonsingular power flow Jacobian matrix.A method is proposed to calculate the parameter sensitivity of compute the sensitivity of LIB point,which only solves a system of linear equations with extended power flow Jacobian matrix on the left-hand side.A method is also proposed to calculate the minimum load margin of static voltage stability including LIB point,which,combined with the load growth patterns and fluctuation forms,establishes the continuation power flow model and the optimization model for solving minimum load margin.Simulation for IEEE 118-bus system verifies it simple and effective.