Data-driven power distribution network cable variable relationship diagnosis method, device and system

Abstract

The invention discloses a data-driven distribution network cable variable relationship diagnosis method, device and system. The method comprises the following steps: calculating correlation coefficients between distribution transformers in different time windows and original affiliated feeders of the distribution transformers; screening out the maximum correlation coefficient as the intermediate correlation coefficient of each distribution transformer; correcting all intermediate correlation coefficients based on a virtual agent thought to obtain advanced correlation coefficients of each distribution transformer; based on the advanced correlation coefficient, calculating an advanced correlation coefficient threshold, and screening out a line-to-transformer relationship suspected abnormal distribution transformer; and correcting the line change relationship suspected abnormal distribution transformer to the most possible feeder line, and if the corrected feeder line is different from the original feeder line, determining that the suspected abnormal distribution transformer is the distribution transformer with the wrong line change relationship. The method can be used for identifyingthe distribution network line change relationship errors of any scale, is simple in calculation and clear in principle, and can help distribution network operation personnel to discover line change relationship connection errors in time.

Description

technical field [0001] The invention belongs to the technical field of distribution network line-to-change relationship diagnosis, in particular to a data-driven distribution network line-to-line change relationship diagnosis method, device and system, in particular to a medium-voltage data-driven distribution network line-to-line relationship diagnosis method, device and system. Background technique [0002] The line-to-line transformation relationship of the medium-voltage distribution network is composed of medium-voltage feeders, distribution transformer loads, tie switches, and transmission lines. System (Power Management System, PMS). However, due to the frequent switching and updating of configurations of a large number of contact switches in the actual operation process, the low accuracy of measuring devices, and the poor subjectivity of manual operation, it is difficult to match the current distribution network line change relationship with the field. [0003] The...

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Problems solved by technology

[0004] The correct distribution network line change relationship is the research basis for power system line loss calculation, planning and design, and stable operation. Without a timely and accurate distribution network line change relationship, important work such as line loss calculation will be difficult to advance

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