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电网技术  2009 

基于半不变量法的随机潮流误差分析

, PP. 32-37

Keywords: 随机潮流(PLF),误差分析,半不变量法,线性相关,分布函数

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Abstract:

随机潮流可以给出在考虑各种不确定因素下系统状态的概率分布信息,但基于半不变量法计算随机潮流时为求得所需结果不得不采取近似和假设。深入分析了随机潮流计算各环节的假设条件及其可能引起的误差。为使随机潮流模型更符合实际,文中提出了如何处理节点功率相关性、故障列表和调度策略等问题;此外比较了2种求随机变量分布的方法,阐述了它们的特点及其误差;最后分析了系统规模对计算误差的影响。文中以IEEERTS24节点系统为算例,以蒙特卡罗法的结果为基准,在误差分析的每一部分均给出了相应的数值结果。

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