一种基于自适应步长控制与组合参数化的改进连续潮流计算方法

提出了一种可以完全跟踪光伏(PV)曲线斜率变化的自适应变步长算法,并在理论上比较分析了所提变步长法与常规变步长法的灵敏度特性,通过分析发现,所提变步长法具有更优的自适应性,在保证连续潮流计算精度的同时,大幅降低了计算时间。提出了一种组合参数化法,即在PV曲线的不同区域采用不同的参数化法,同时在PV曲线追踪过程中设置参数化切换断点,并以校正不收敛作为组合切换判据。基于IEEE标准节点系统的计算结果验证了所提自适应变步长算法与组合参数化法的有效性与优越性。

An improved continuation power flow method based on adaptive controlled step-size and combination of parameterization

An adaptive controlled step-size method that can trace the slope of PV(PhotoVoltaic) curve completely is proposed. The step-size sensitivity of the proposed method and the conventional step-size methods is analyzed theoretically, on this basis, it is proved that the proposed method has better adaptability, and it can not only ensure the calculation accuracy of CPF(Continuation Power Flow),but also greatly reduce the calculation time. Then, a combination of parameterization method is proposed, in which different parameterization methods are used in different regions of the PV curve. At the same time, the switching breakpoints of the combination of parameterization method are set during the tracking process of the PV curve, and the correction of divergence is used as the combination switching criterion. Based on the calculation results of IEEE standard test system, the validity and superiority of the proposed adaptive controlled step-size method and the combination of parameterization method are verified.