有限相量测量单元下最小二乘估计的广域后备保护算法

发布时间：2018-03-26 15:41

本文选题：广域后备保护　切入点：相量测量单元　出处：《电力系统自动化》2015年20期

【摘要】：提出了一种基于有限相量测量单元(PMU)的广域后备保护算法。它采用最小二乘法得到一个区域内各节点的电压估计值,利用这些电压估计值计算出本区域内每条线路的电流估计值,获得各线路电流实际值与估计值的残差值,进行排序,将电流残差值最大的两条线路列为疑似故障线路。利用多组PMU的电压故障分量,计算出疑似故障线路的多组线路故障点位置。利用故障点位置位于[0,1]之间等特性,给出了线路故障的判据。在IEEE 14节点系统上的仿真实验结果表明,所提出的算法能够准确判断出故障线路,不受故障点位置、故障类型的影响。
[Abstract]:A wide area backup protection algorithm based on the finite phasor measurement unit (PMU) is proposed, which uses the least square method to obtain the voltage estimates of each node in a region. These voltage estimates are used to calculate the current estimates for each line in the region, and the residual values of the actual and estimated current values for each line are obtained and sorted, Two lines with the largest residual value of current are classified as suspected fault lines. By using the voltage fault components of multiple sets of PMU, the location of multiple fault points of suspected fault lines is calculated. The simulation results on IEEE 14-bus system show that the proposed algorithm can accurately determine the fault line without the influence of fault location and fault type.
【作者单位】：西南交通大学电气工程学院;南京南瑞继保电气有限公司;
【基金】：国家自然科学基金资助项目(51377137)~~
【分类号】：TM744

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