基于L指标的电压稳定约束下的最优潮流

为追求更大的经济利益，电力系统的运行日益接近其稳定临界，增加了系统出现电压失稳的可能性，故在传统的最优潮流中考虑电压稳定约束十分必要。本文利用电压稳定￡指标，建立了包含电压稳定约束的四种最优潮流模型（VSCOPF）：最大化稳定裕度模型、固定稳定裕度模型、线性组合模型和混合模型。通过多个测试系统对上述模型进行了分析和计算，基于计算结果对各个模型解的存在性、能否科学地兼顾电压稳定性和经济性等问题进行了较为详细的讨论。该项工作对于寻求更为科学实用的、能够合理计及电压稳定约束的最优潮流模型，具有一定的帮助。

Optimal Power Flow with Voltage Stability Constraint Based on L Index

Under the deregulation environment,power systems are operating even more close to its stability limit so as to obtain more profit,which increases the possibility of voltage instability.So,it is necessary to incorporate voltage stability constraints with the conventional optimal power flow(OPF).In this paper,we first establish four types of voltage stability constrained optimal power flow(VSCOPF) model based on a local voltage indicator named L.Then,these models are validated by some testing systems,such as WSCC 9-bus,IEEE 57-bus and 118-bus system.On the basis of the calculation results of the cases studied,we make a comparison among these models.Studies in this paper are helpful to find more usable and appropriate optimal power flow model with considering the constraints of voltage stability.