To locate electrical topology anomalies, multi-level district topology identification method based on voltage, current and power factor of user electric energy data acquiring system is proposed. The method is a comprehensive application of voltage correlation analysis method based on Pearson correlation coefficient analysis, power balance analysis method based on multiple linear regression and line impedance analysis method. In order to give full play to the advantages of each method, voltage analysis correlation method is mainly used to judge the relationship between electricity meter box and electricity meter, power balance analysis method and line impedance analysis method are used to judge the relationship between electricity meter box and transformer. Using multi-level district topology identification method, the correct topology from transformer to electricity meter box and meter can be obtained. Finally, through the analysis and calculation of a actual case, the correctness and effectiveness of the proposed method are verified.

multi-level topology identification, line impedance analysis, multiple linear regression, voltage correlation analysis, Pearson correlation coefficient, power balance analysis