Method for detecting power distribution network early failure

A method for detecting power distribution network early failure, comprising:

• (1) decomposing a waveform into an approximation part and detail parts by wavelet transform, wherein the approximation part forms an approximate shape primitive, and the detail parts form a distortion curve are distortion primitives,
• (2) decomposing the detail parts of the distortion curve into a group of three by dividing the distortion primitives into three distortion primitives including harmonics, pulses, and other distortions based on splitting the distortion curve into a plurality of segments based on extreme points on the distortion curve and combining said plurality of segments with a plurality of neighboring segments based on rules of combination into the group of three distortion primitives, wherein the three distortion primitives are formed to comprise said three distortion primitives of harmonics, pulses, and other distortions,
• (3) extracting characteristics of the approximate shape primitive and the three distortion primitives and time relationships between the approximate shape primitive and the three distortion primitives and time relationships between the three distortion primitives,
• (4) constructing probability distribution of the waveform based on a waveform generation process according to the characteristics of the approximate shape primitive and the three distortion primitives and the time relationships between the approximate shape primitive and the three distortion primitives and time relationships between the three distortion primitives by selecting a plurality of selected primitives from a primitives library and combining the selected primitives into a waveform in a sequential order, wherein time relationships between the selected primitives are generated by the sequential order;
• (5) comparing waveforms of an abnormal event of a power distribution network and the probability distribution of the waveforms of different types from the construction in step (4), and obtaining a judgment result of the waveform waveforms of the abnormal event according to probability distribution of waveforms of different types;
• and
• (6) detecting an early failure of the power distribution network based on the judgment result and actively treating the early failure of the power distribution network by replacing defective equipment associated with the early failure.