中文摘要：

现有电压控制中没有考虑预测负荷和实际负荷之间的偏差,电压控制效果难以保证。为此引入负荷模糊数度量负荷偏离不确定性,提出考虑负荷模糊性的长期电压稳定最优协调控制方法。在含有连续-离散时间微分-代数方程约束和以负荷节点电压偏差与控制成本最小为控制目标的准稳态控制模型的基础上,建立协调电压控制模糊非线性规划模型;然后,根据最大隶属度原则,将模糊非线性规划问题转化为普通非线性规划问题,并基于内点法求解。通过新英格兰10机39节点系统算例仿真验证该模糊优化电压控制方法的有效性和鲁棒性。

英文摘要：

Because the deviation between predicted and practical load level is not considered in the existing voltage control scheme,voltage control effect cannot be guaranteed.So after introducing load fuzzy number to describe the load deviation uncertainty,an optimal coordinated control method for long-term voltage stability is proposed by considering load fuzziness.Based on the quasi-steady-state control model,in which minimum voltage deviations for load bus and control cost are regarded as objective,and continuous and discrete time differential-algebraic equations are taken as constraints,a fuzzy nonlinear programming model for coordinating voltage control is built.Then according to the maximum membership principle,the fuzzy nonlinear programming issue is converted into a common nonlinear programming problem which is solved by interior-point method.The effectiveness and robustness of proposed method are verified through the New England 10-machine 39-bus system.