考虑系统控制设备的运行情况和静态电压失稳校正控制措施，以切负荷最小为目标函数，建立判断系统潮流可解性的全二次优化模型，并结合模态分析法来识别出系统失去静态电压稳定的状态，从而提出判断电压稳定性的新方法。基于所提方法，结合蒙特卡罗模拟法对系统状态进行随机抽样，从而对系统的静态电压稳定性进行风险评估，可以计算出系统静态电压失稳概率、维持电压稳定需要的切负荷量期望值以及切负荷量与系统静态电压失稳概率之间的关系，为电压稳定风险评估提出一条有效的途径。IEEE14节点系统的仿真结果验证了所提模型和方法的有效性。

Considerating operating conditions of controllable equipment and corrective controls for voltage stability, a quadratic optimal model of minimizing the total load curtailment was proposed to identify power flow solvability. This model is combined with the modal analysis method to recognize system voltage instability. Based on the proposed method, a risk assessment technique for static voltage stability was presented using Monet Carlo simulation for selecting system states. The technique evaluates the probability of system voltage instability, expected load curtailments required to avoid system collapse and relationship between load curtailment and probability of voltage instability. The simulation results of the IEEE14 bus system demonstrate the effectiveness of the proposed method and technique.

国家重点基础研究发展计划项目(973项目)(2004CB217908)；重庆市科委自然科学基金计划项目(2008BB6039)。