文章摘要
基于正序电压变化量的故障电压暂降源定位算法
Fault Source Location Method for Distribution Network Based on Positive Sequence Voltage
投稿时间:2019-03-30  修订日期:2019-08-22
DOI:
中文关键词: 故障定位  正序电压  马氏距离  pearson相关系数  遗传算法
英文关键词: Fault location  Positive sequence  Mahalanobis distance  Pearson correlation coefficient  Genetic algorithm
基金项目:
作者单位E-mail
戴锋 国网江苏省电力有限公司检修分公司 zj_zj_df@js.sgcc.com.cn 
刘贞瑶 国网江苏省电力有限公司检修分公司  
李丹奇 东南大学电气工程学院  
沙浩源 东南大学电气工程学院  
陈轩 国网江苏省电力有限公司检修分公司  
郑建勇 东南大学电气工程学院  
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中文摘要:
      随着越来越多的敏感负荷接入电网,由电压暂降问题直接及间接带来的经济损失日趋严重。在各类型电压暂降中,故障引发电压暂降的情况所占比重最大,对其进行准确定位是高效治理电网故障的必要前提。本文针对故障型暂降源提出了一种基于正序电压变化量的定位方法,基于发生故障时各监测点的正序电压分布特性,建立监测点信息库和各支路故障距离定位模型;然后基于马氏距离与pearson相关系数利用信息库匹配的方法对故障所在支路进行初选,最后采用遗传算法对最优故障距离目标函数进行寻优,定位故障源。利用IEEE14节点网络进行仿真验证,证明了该方法的有效性与准确性。
英文摘要:
      As more and more devices sensitive to voltage fluctuation are widely connected to the power grid, the direct and indirect economic losses caused by the faults in the distribution network become more and more serious, which puts forward higher requirements for power supply quality. Accurate location of fault sources is an indispensable step in the treatment of power quality problems. In this paper, a fault source location method for distribution network based on positive sequence voltage is proposed for fault-type disturbance. Based on the distribution characteristics of positive sequence voltage at each monitoring point when a fault occurs, the information base of monitoring points and the fault distance location model of each branch are established. The concept of similarity index is defined based on the correlation coefficient between Mahalanobis distance and Pearson, which serves as the objective function to determine the location of the fault source to be located. The genetic algorithm is used to find the optimal fault distance as the location result. The effectiveness and accuracy of the proposed method are verified by simulation using IEEE 14-node network.
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