Power failure event-based power distribution network cable variable relationship anomaly diagnosis method, device and system

Abstract

The invention discloses a power failure event-based power distribution network cable variable relationship anomaly diagnosis method, device and system. The method comprises steps of generating a historical power failure distribution transformer set based on obtained power data of distribution transformers; obtaining nearby buses and distribution transformers based on longitude and latitude information of the power failure distribution transformers in the power failure distribution transformer set; calculating a correlation coefficient index of the power failure distribution transformer and a nearby bus to find out a suspected subordinate bus; screening out all lines under the suspected subordinate bus corresponding to the power failure distribution transformer; calculating power failure distribution transformer number proportion indexes corresponding to all lines under the suspected subordinate bus, and seeking a power failure distribution transformer number proportion index thresholdvalue; and screening out suspected subordinate lines of the power failure distribution transformer based on the threshold value, and finding out the power failure distribution transformer with the wrong line change relationship and the suspected subordinate lines of the power failure distribution transformer. The method is simple in calculation, and can help an operator to discover an abnormal line change relation distribution transformer in time and recommend a subordinate line of the distribution transformer.

Description

technical field [0001] The invention belongs to the field of abnormal diagnosis of medium-voltage distribution network line-transformation relationship, and specifically relates to a method, device and system for abnormal diagnosis of distribution network line-transformation relationship based on power failure events, which are suitable for medium-voltage distribution network. Background technique [0002] The line-to-line transformation relationship of the medium-voltage distribution network is the relationship between the medium-voltage bus, the distribution transformer load, and the tie switch. It describes the power supply path from the medium-voltage bus to the distribution transformer load. The manually maintained Power Management System (PMS) mainly relies on on-site inspections by grassroots employees. Due to factors such as complicated equipment, long time-consuming, and difficult inspections, it is difficult to obtain the correct relationship between medium-voltage ...

AI Technical Summary

Problems solved by technology

The manually maintained Power Management System (PMS) mainly relies on on-site inspections by grassroots employees. Due to factors such as complicated equipment, long time-consuming, and difficult inspections, it is difficult to obtain the correct relationship between medium-voltage distribution network lines and transformers. , so that the relationship between the actual site and the PMS midline substation is inconsistent, which will lead to business pain points such as large potential safety hazards in line maintenance, high calculation errors in medium-voltage line loss rates, and low reliability analysis accuracy, which seriously restricts the construction of a first-class distribution network.

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