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电网技术  2015 

比例积分型二级电压控制器的多目标参数优化

DOI: 10.13335/j.1000-3673.pst.2015.05.029, PP. 1365-1371

Keywords: 二级电压控制器,比例积分,参数优化,多目标动态优化,规格化法平面约束法

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Abstract:

为通过参数优化提升现有二级电压控制器的控制效果,以先导节点电压偏差平方的积分和发电机无功出力改变量平方的积分最小为目标,基于电力系统准稳态模型,建立了比例积分型二级电压控制器多目标参数动态优化模型。先用隐式梯形法将该模型转化为多目标非线性规划模型,再由规格化法平面约束法将该模型转化为一系列单目标非线性规划模型。借助通用代数建模系统(generalalgebraicmodelingsystem,GAMS)框架下的CONOPT求解器对其进行求解,从而获得帕累托最优解集。采用模糊隶属度函数方法确定最优折中解实施控制。以新英格兰39节点系统和包含138台发电机、968节点、27个控制分区的某省级电力系统为例,通过与传统PI型二级电压控制器和协调二级电压控制器进行对比分析,证实了所提方法的有效性。

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