Method and system for real-time monitoring of analog wire coated by ice of overhead power transmission line

Abstract

The invention relates to a method and a system for real-time monitoring of an analog wire coated by ice of an overhead power transmission line. The method comprises the following steps of: (1) mounting a section of analog wire having same model and material with the line lead wire on a tower of the overhead power transmission line; (2) arranging a measuring head on the analog wire for measuring weight of the analog wire; (3) ordering that coating ice of various types and with different section shapes is converted to a circular glaze section with density of 0.9g / cm<3>, wherein calculation formula of ice coating thickness b of the analog wire in a unit length is FORMULA, wherein D (mm) is the outer diameter of the analog wire; a known parameter w1 is self-weight load of the analog wire; and a known parameter w3 is vertical total load when the wire is coated by ice and can be measured by the measuring head. The invention has the advantages of reasonable and correct measurement of synthetical load of the line coated by ice and thickness of the coating ice, simple algorithm and accurate result.

Description

technical field [0001] The invention relates to the monitoring field of icing on overhead transmission line conductors, in particular to a method and system for real-time monitoring of simulated icing conductors on overhead transmission lines, and is particularly suitable for the fields of early warning, monitoring and prevention of icing on transmission lines. Background technique [0002] my country has a vast territory and a changeable meteorological environment. It is one of the countries in the world with more icing on transmission lines. The two major ice and snow disasters in 2005 and early 2008 caused serious icing, tripping, disconnection, tower collapse, etc. Accidents have brought great losses to the national economy, industry and agriculture, and people's daily electricity consumption. The main reason for these two ice and snow disasters is the large-scale, long-term low-temperature rain and snow freezing climate that occurs once in many years, but it also reflect...

AI Technical Summary

Problems solved by technology

[0004] In the past, the monitoring of icing on transmission lines was mainly realized by on-site observation and measurement by line operators. However, the method of manual on-site observation and measurement has the following disadvantages: 1. The labor cost is huge and the labor efficiency is low; 2. The naked eye can only observe The surface conditions of the ice-covered transmission lines can only be visually inspected, and accurate and scientific data cannot be provided, nor can the comprehensive load of the ice-coated conductors of overhead transmission lines be calculated.

[0005] The applicant filed an application on March 26, 2009. The title of the patent application is: method and system for real-time monitoring of icing on overhead transmission line conductors. The patent application number is 200910097184.7. The inclination angle of the suspension point, the temperature of the wire, the offset angle of the suspension insulator string and the basic parameters of the line are used to determine and calculate the comprehensive load of the ice-coated wire and the thickness of the ice-coated wire. This method is theoretically reasonable and correct, and the result is accurate. There are a lot of measuring equipment, many parameters need to be determined, and the calculation formula is complicated

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