Method for estimating loss of medium-voltage overhead line by considering influence of south branch trough

Abstract

The invention discloses a method for estimating loss of a medium-voltage overhead line by considering the influence of a south branch trough. The method comprises the following steps: a monitoring terminal obtains a regional data signal; the monitoring terminal judges whether the regional medium-voltage overhead line is in the boundary range of the region affected by the south branch trough, and if the regional medium-voltage overhead line is affected, the next step is executed; the monitoring terminal judges the influence degree of the regional medium-voltage overhead line by the south branch trough; and the monitoring terminal outputs the influence degree grade of the south branch trough. The monitoring terminal judges whether the regional medium-voltage overhead line is within the boundary range of the region influenced by the south branch trough, judges the degree grade of the regional medium-voltage overhead line influenced by the south branch trough, and outputs the degree grade of the south branch trough, so that the loss estimation of the regional overhead line influenced by the south branch trough by the monitoring terminal is realized.

Description

technical field [0001] The invention relates to the technical field of electric power disaster prevention and reduction, in particular to a method for estimating the loss of a medium-voltage overhead line considering the influence of a south branch trough. Background technique [0002] The South Branch Trough is an active low-latitude trough, and the seasonal variation of the South Branch Trough is closely related to the activity of cold and warm air. The Mediterranean Sea (25°N, 35°E) is the high-frequency area of ​​the southern branch trough at low latitudes in the northern hemisphere, while the low trough affecting southern my country mainly originates from the Bay of Bengal on the south side of the plateau. On the one hand, continuous heavy rain disasters will affect the stability of the distribution network, especially causing disconnection of medium-voltage overhead distribution lines, collapse of towers, and wind flashovers, etc., and even evolve into large-scale powe...

AI Technical Summary

Problems solved by technology

[0004] The current distribution network management system only collects power information, analyzes the stability of the distribution network through historical equipment failure rates and expected failure sets, lacks natural disaster early warning and adaptive decision-making, and fails to accurately predict meteorological alignments such as the South Branch Trough The loss of overhead lines is not conducive to distribution network dispatching, emergency rescue, and optimization of the power business environment.

Practice has shown that although the south branch trough is an important factor causing the spring rainstorm in South China, it still needs to be studied in depth to estimate the loss caused by medium voltage distribution overhead lines

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