1results about How to "Improve line selection accuracy" patented technology

This invention discloses a method for fault location in distribution networks based on multi-criteria fusion and matrix topology search, relating to the field of distribution network fault detection technology. The method includes: synchronously collecting zero-sequence voltage and current at the distribution network bus and zero-sequence current information of each outgoing line; determining whether a single-phase grounding fault has occurred by calculating the magnitude of the neutral point zero-sequence voltage; constructing a steady-state line selection criterion, and simultaneously constructing a transient line selection criterion using an adaptive window S-transform, thus constructing a comprehensive line selection criterion, identifying lines with values ​​greater than a selection threshold as faulty lines; improving the features extracted from line selection to construct transient steady-state criteria for node classification, and then constructing a comprehensive node classification criterion, identifying nodes with values ​​greater than a threshold in the comprehensive criterion as faulty nodes; finally, based on the node classification results, sequentially constructing a network topology matrix, a node classification matrix, a fault path matrix, and a fault judgment matrix; and achieving accurate location of the fault section by querying the corresponding elements in the fault judgment matrix.