The invention provides a non-technical
line loss state evaluation method based on multi-scale spatial-temporal
feature fusion in a low-
voltage distribution network environment, and relates to the technical field of
electric power big data analysis and intelligent operation and maintenance of a distribution network. According to the invention, a fusion architecture based on a multi-scale time
convolution network and a long short-
term memory network is constructed; extracting multi-scale spatio-temporal characteristics of a user from instantaneous
electricity utilization abrupt change to a periodic load rule through an MSTBlock unit; designing a cluster balance constraint mechanism to ensure that rare and key non-technical
line loss abnormal early warning signals are not covered by
mass normal power utilization data; according to the data scale, adaptively selecting a graph segmentation or
spectral clustering integration strategy to output a clustering
label, and mapping the clustering
label into a user
power consumption behavior evolution track; according to the method, the power utilization abnormal level can be identified from the original load
signal with random fluctuation interference, and the
troubleshooting priority is calculated in combination with the
transformer area
correlation analysis, so that the accuracy and
interpretability of the non-technical
line loss unsupervised evaluation decision of the power distribution network are remarkably improved.