考虑电压安全裕度的多目标最优潮流模糊建模

Fuzzy Modeling for Multi-Objective Optimal Power Flow Considering Voltage Security Margin

将模糊建模方法应用于考虑电压安全裕度的多目标最优潮流模型,并提出为保证系统安全经济运行,有必要确定合理的理想负荷裕度范围。系统所有负荷按线性、恒功率因数持续增长的变化模式进行研究,用预测–校正原对偶内点法求解优化模型。算例结果表明,该模型可有效确定出系统运行需要避免的负荷条件以及系统的最优安全负荷点。仿真分析指出了影响系统最优发电成本的主要因素。

The fuzzy modeling approach is applied to multi-objective optimal power flow when voltage security margin is taken into account, and it is pointed out that to ensure secure and economic operation of power system, it is necessary to determine reasonable range of ideal loading margin. All loads are regarded as linear and continually increasing in the mode of constant power factor, and the optimization model is solved by predictor-corrector primal-dual interior point method Calculation results of IEEE 9-bus system and IEEE 57-bus system show that the model built by the proposed approach can effectively determine the infeasible loading conditions for power system and the optimal secure loading point. Besides, by means of analyzing simulation results the main factors influencing optimal generation cost are revealed.