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配电网状态估计误差的电路表示方法

DOI: 10.13334/j.0258-8013.pcsee.2014.28.011, PP. 4839-4846

Keywords: 配电网,状态估计,电路表示,量测精度,源强度

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Abstract:

量测信息少、测量精度不足是影响配电网状态估计精度的重要问题。根据实时量测和伪量测数据的精度,判断配电网状态估计结果的误差范围,对配电网的运行和观测规划具有重要指导意义。现有的采用信息矩阵求逆的方法,物理意义不明确,难以分析各类型量测的作用。提出一种配电网状态估计误差的电路表示方法,将量测精度对配电网状态估计误差的影响用导纳电路表示,并用源强度和关联强度分析不同类型量测在状态估计中的作用。理论分析和算例验证表明,该方法可直观表示配电网状态估计的误差分布,确定各个量测对状态估计误差的影响,从而为配电网的运行规划提供指导。

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