基于有限测量信息的加权最小二乘法在配电网状态估计中的应用

发布时间：2018-01-12 17:26

本文关键词：基于有限测量信息的加权最小二乘法在配电网状态估计中的应用　出处：《北京交通大学学报》2014年05期 　论文类型：期刊论文

【摘要】：为了适应测量装置数量受限的配电网控制的需要,提出一种基于有限测量信息的配电网状态估计方法.模型中将区域配电网节点电压幅值和相角作为状态变量,测量节点电量、负荷规划数据分别作为实际测量量和伪测量量,利用加权最小二乘法权重参数的合理配置保证模型的合理性并求解.通过对英国某区域配电网实例仿真计算,结果表明:本文状态估计模型能够根据有限测量量进行网络全节点的状态估计,且平均估计误差满足实际应用要求;同时,定性描述了测量点数量、估计初值与状态估计误差的关系,为进一步探索测量点优化配置和最优状态估计求解奠定基础.
[Abstract]:In order to meet the needs of distribution network control with limited number of measuring devices, a method of distribution network state estimation based on limited measurement information is proposed. The voltage amplitude and phase angle of regional distribution network nodes are taken as state variables in the model. Measuring node electricity quantity, load planning data as actual measurement and pseudo measurement. The rationality of the model is ensured and solved by the rational allocation of weighted least square method. The simulation of a distribution network in Britain is carried out. The results show that the state estimation model in this paper can estimate the state of the whole network nodes according to the limited measurements, and the average estimation error can meet the requirements of practical application. At the same time, the number of measurement points and the relationship between the initial value and the error of state estimation are described qualitatively, which lays a foundation for further exploring the optimal configuration of measurement points and the solution of optimal state estimation.
【作者单位】：北京交通大学电气工程学院;
【基金】：国家自然科学基金资助项目(51277009)
【分类号】：TM73
【正文快照】： 近年来,随着我国配电网自动化建设的加强,实现以实时方式对配电网进行远程或者是近距离的控制和管理,并及时收集配电网的运行数据来加强配电网的安全、稳定和可靠运行管理,成为当前电力系统发展的一个重要命题.电力系统状态估计根据相关测量信息,可以估计出电力网络当前的运行

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