Low-voltage treatment method for rural power grid

Abstract

The invention discloses a low-voltage treatment method for a rural power grid. In the rural power grid, four-stage regulating and controlling devices are arranged at the low-voltage line from a transformer substation to a supplied user, which sequentially comprise a first-stage on-load voltage regulation and transformer substation concentrated compensation device for regulating and controlling the transformer substation, a second-stage multilevel circuit reactive compensation device for regulating and controlling a medium-voltage line, a third-stage on-load tap changing transformer for regulating and controlling a distribution area, and a fourth-stage low-voltage reactive compensation device for regulating and controlling a low-voltage line, wherein the low-voltage line is connected with a low-voltage monitor; the low-voltage monitor and each-stage regulating and controlling device are connected with a regulating and controlling management main station through the network or wireless communication. In the low-voltage treatment method disclosed by the invention, when the low-voltage monitor detects a certain low-voltage abnormality in the line, the regulating and controlling management main station regulates and controls the device nearest the fault place according to a sequence from the final state to the advanced voltage of the line; the regulated voltage value is transmitted to the regulating and controlling main station; the voltage data are compared with the reference value, and if the voltage data meet the standard, the main station monitors again; or, the line gives out an alarm.

Description

technical field [0001] The invention relates to the field of low-voltage control of rural power grids, in particular to a low-voltage control method for rural power grids. Background technique [0002] At present, my country's economy is in a transitional stage, and the rapid growth of rural electricity demand has led to insufficient supply capacity and reduced voltage quality in some rural power grids. According to the statistics of the Ministry of Agriculture and Electricity, 36.4% of distribution transformers with "low voltage" exist in the country at present, and the "low voltage" problem of individual rural users is more prominent. After actual investigation, the domestic low-voltage control has shown problems such as unreasonable selection of voltage control equipment, imperfect voltage control strategy, and ineffective effects in practical applications. For example, in the national patent with the publication number CN102904268A "a three-stage joint debugging reactiv...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem that the existing rural power grid system is difficult to solve the problem of voltage quality degradation, provide a low voltage management method for rural power grids, and solve the defect of low voltage qualification rate caused by the low voltage problem of rural power grids

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