A system and method for melting ice of distribution network lines

Abstract

The invention discloses an ice-melting system and an ice-melting method for lines of a distribution network. The AC ice-melting unit includes an ice-melting switch, an ice-melting protection device, and a fixed ice-melting voltage output device. The long branch line mobile DC ice-melting unit includes a mobile ice-melting power generation device and a first ice-melting rectifier connected to each other. The short branch line is portable. The DC ice-melting unit includes a portable ice-melting power generation device and a second ice-melting rectification device connected to each other; the method includes selecting different ice-melting units to perform AC or DC ice melting according to the icing situation and line type. The invention is designed for the main line, long branch line and short branch line, covering all lines of the distribution network to melt ice, can improve the efficiency of line thawing in the distribution network and expand the scope of ice melting, and strengthen the lines of the distribution network to resist large-scale rain and snow freezing disasters ability.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and in particular relates to an ice-melting system and an ice-melting method for distribution network lines. Background technique [0002] Since 2008, the large-scale rain, snow and freezing disasters in the south have caused heavy damage to the power systems of Hunan, Guizhou, Jiangxi, Zhejiang and other provinces. The distribution network lines are the most terminal of electricity sales, and they are widely distributed, mostly in micro-topographic and micro-meteorological areas. The frequent accidents of tower collapse and disconnection have directly affected the reliable power supply of users. The research and design of the distribution network line ice melting system is the key to ensure the reliability of power supply for users during ice disasters. [0003] At present, there are not many studies on the distribution network ice melting system. The distribution network ice mel...

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Problems solved by technology

[0003] At present, there are not many studies on the distribution network ice melting system. The distribution network ice melting devices developed by some scientific research institutes are mainly aimed at melting short lines and ultra-short lines. Carry out partial ice melting, and have not yet formed an ice melting system for a certain area

Moreover, there are many mixed line types in the distribution network, and generally only small cross-section conductors can be deiced, which is difficult

When a large-scale ice disaster occurs, the current configuration of ice melting devices is not enough to support the ice melting of all lines in the distribution network system in this area

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