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Method for preventing ice and snow calamity of overhead transmission line

An overhead transmission line, anti-ice and snow technology, applied in the field of transmission line operation and maintenance, overhead transmission line anti-ice and snow disasters, can solve the problems of line tower ice coating, equipment ice flash, pollution flash discharge, etc., achieve excellent hydrophobic effect, durable Good abrasiveness and good adhesion

Active Publication Date: 2011-02-09
上海兆邦电力器材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 500kV Yi (Hubei Yichang) Hua (Shanghai Huaxin) DC transmission line, the main artery of the Three Gorges power transmission to East China, was affected by this. The towers of Line 1146-1153 in the Zhangchong section of Huoshan, Dabie Mountain were seriously covered with ice, resulting in four 500 The kilovolt line tower collapsed on the 18th, and the power transmission of this power transmission channel was interrupted.
However, each line is required to be equipped with an ice-melting busbar, and the line also requires the design of an ice-melting system. It must be cut off for a long time during work, and the frozen line can only be isolated from the power grid. Remove ice and snow on power transmission equipment such as poles (iron towers), lightning protection lines, electric porcelain bottles, and cross arms
In severe ice and snow weather, large areas of transmission lines and equipment are often covered with ice, which causes ice flash and pollution flash discharges in many equipment, which not only consumes a lot of energy, but also often makes it difficult to implement the short-circuit ice melting method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1, 10 kV power transmission line anti-icing method, automatic control deicing device and anti-icing hydrophobic membrane material composition. Anti-freezing hydrophobic film material, coated on poles, wires, angle irons, and electric porcelain bottles. The automatic control snow and ice remover is fixed on the wire cross arm of the electric pole, and the automatic control ice and snow remover is composed of a transformer, a delayer, an ice and snow thickness switch, a temperature switch and a vibrator. One end of the transformer is connected to a 10 kV power supply, and the other end is connected to the vibrator through a control switch. The transformer converts the voltage to 0.38 kV, which is suitable for the working voltage of the rapper. The ice and snow thickness switch is connected in series with the temperature switch and connected in parallel with the delay switch.

[0035] The structure of the rapper is driven by a single-phase electromagnet. Accor...

Embodiment 2

[0043] Embodiment 2, 220 kilovolt transmission line anti-ice and snow method, adopt organosiloxane water-repellent and polytetrafluoroethylene and silica sol to be the antifreeze hydrophobic membrane material of basic component respectively on iron tower and wire, this The hydrophobic angle of the water-repellent agent is 140-155°, and the weight gain of the film layer is 0.5mg / cm 2 . Almost no increase in the load of the transmission line. A plurality of rappers are respectively arranged between the joints of the porcelain bottle and the cross arm. The vibrator adopts a mechanical vibrator, and when the load of the line is greater than the set value, the vibrator will act. The ice and snow accumulated on the wires, porcelain bottles, and cross-arms fell one after another. When the load of the line is less than the set value, the shocker resets.

[0044] The invention is suitable for preventing ice and snow disasters of various overhead wires and outdoor metal structures.

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PUM

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Abstract

A method against ice and snow disasters for overhead transmission lines belongs to the maintenance technology of the transmission lines. The proposal is that an ice and snow remover controlled automatically is arranged on an electric pole or an iron tower of the transmission lines; anti-freezing hydrophobic film material is adopted to coat the surface of the electric pole, wires, an angle iron and porcelain insulators of erecting lines. An anti-freezing hydrophobic film is formed on the surface of the coated the electric pole, the wires, the porcelain insulators and the angle iron; therefore,when splashing on the surface, water cannot be adhered, frozen and bound, just as the water drops on a lotus leaf, forms droplets and falls down the ground without trace. The ice and the snow on the electric pole, the wires and an angle iron frame break and fall if only the ice and the snow are gently vibrated and hit. Therefore, the remover has the advantages of great hydrophobic effect, good adhesive power, good wear resistance, etc. The remover is characterized by low cost, good effect, no power off, automatic control, safety and reliability and low energy consumption. The remover is applicable to various overhead transmission lines and outdoor metal structures for preventing the ice and snow disasters.

Description

technical field [0001] The invention relates to a method for preventing ice and snow disasters of an overhead transmission line, which belongs to the transmission line operation and maintenance technology. Background technique [0002] Electricity and communications are the economic lifeblood of a country. China's economic take-off and social stability require the support of a safe, effective and uninterrupted power communication industry, especially my country's strategic power transmission lines that have been built or are under planning, most of which stretch from west to east across mountains and mountains for thousands of kilometers, connecting several regions The power grid directly affects the production and life of hundreds of millions of people in many provinces and cities. Once the ice and snow disaster occurs, the impact will be huge. [0003] In January 2008, moderate to heavy snow fell across the country. Transmission lines in several southern provinces encount...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G7/16C09K3/18B06B1/02B06B1/10
Inventor 陶松垒陶钧炳傅晓航陈丽君白建辉范佳一
Owner 上海兆邦电力器材有限公司