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多运行方式下PSS参数优化算法的收敛特性改善

, PP. 171-177

Keywords: 电力系统稳定器(PSS),参数优化,特征根灵敏度,非线性规划法

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Abstract:

为改善用于多机系统多运行方式下的电力系统稳定器(PSS)参数优化的非线性规划方法的收敛特性,对目标函数进行了修改,使得优化问题中所计及的特征根同时包括了所有不满足要求和部分满足要求的特征根的实部和阻尼比,并给这些特征根乘上依据稳定程度确定的权重系数。在8机系统算例上,详细讨论了在特征根范围取不同值,权重系数采用反函数、线性函数等几种表达方式时用拟牛顿法求解优化问题的收敛特性,总结出了权重系数的取值规律和较好的特征根取值范围。结果表明,改进后的方法可有效改善迭代过程的收敛特性。

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