广东电力Issue(11)：37-43,7.DOI:10.3969/j.issn.1007-290X.2015.11.008
基于希尔伯特-黄变换与分形维数的配电网选线研究
Research on Line Selection for Distribution Networks Based on Hilbert Huang Transform and Fractal Dimension
王建元 1许宁 1杨薏霏 2马铭悦 2罗芫 3赵伟男4
作者信息
- 1. 东北电力大学 电气工程学院，吉林 吉林132012
- 2. 吉林省电力公司长春供电公司，吉林 长春132022
- 3. 辽宁省电力公司抚顺供电公司，辽宁 抚顺 113000
- 4. 黑龙江省电力公司大庆供电公司，黑龙江 大庆 163000
- 折叠
摘要
Abstract
A new method for fault line selection based on Hilbert Huang Transformation (HHT)and fractal dimension is pro-posed to avoid wrong selection of fault line selection algorithm in various faults of small current grounding system.In consid-eration of transformer saturation,data of zero-sequence current is collected first;then,data in 1/8 cycle before and after the fault is respectively decomposed by empirical mode decomposition(EMD)to select the highest-frequency intrinsic mode function (IMF)component for mutational points detection and compare mutational point polarity to selection fault lines;fractal dimension method is adopted for EMD of fault information to calculate instantaneous frequency and current value of each IMF component and compare with free oscillation frequency of transient zero-sequence current.The leading IMF com-ponent is selection for signal reconstruction and fractal correlation dimension is calculated.Moreover,correlation dimension is compared in different embedded dimensions to form line selection criteria;in the final a comprehensive decision-making of two lines selection is used for correct line selection.The simulation experiment shows the accuracy of the method.关键词
小电流接地系统/希尔伯特-黄变换(HHT)/经验模态分解(EMD)/关联维数/极性Key words
small current grounding system/HHT/EMD/correlation dimension/polarity分类
信息技术与安全科学引用本文复制引用
王建元,许宁,杨薏霏,马铭悦,罗芫,赵伟男..基于希尔伯特-黄变换与分形维数的配电网选线研究[J].广东电力,2015,(11):37-43,7.
