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Fast ice melting and coating test platform under strong wind galloping condition and test method thereof

A test platform and test method technology, applied in the field of electrical engineering, can solve the problems of large influence of heat dissipation of wires, distortion of test results, high research requirements, etc., and achieve the effect of reducing the probability of disaster recurrence

Inactive Publication Date: 2019-09-17
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Problem 2. The research on the ice melting current characteristics of the test platform is highly demanding under strong wind conditions. Due to the high wind speed and thin ice coating, the external conditions have a great influence on the heat dissipation of the wires, which may easily lead to distortion of the test results of the dynamic characteristics of the ice melting current. The test platform is required to have Strict requirements are put forward for the test design of the dynamic characteristics of dancing conductor ice melting

Method used

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  • Fast ice melting and coating test platform under strong wind galloping condition and test method thereof
  • Fast ice melting and coating test platform under strong wind galloping condition and test method thereof
  • Fast ice melting and coating test platform under strong wind galloping condition and test method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The rapid icing melting test platform under the condition of dancing strong wind includes two parts, the artificial climate simulation room 1 and the dancing icing melting test platform 2; the artificial climate simulation room 1 includes a chamber body 11, a precipitation system 12, a cooling system 13, a System 14, wire placement rack 15, hole 16 and door 17; the chamber body 11 is square, and the dewatering system 12 is installed on the top of the chamber body 11; the cooling system 13 is installed on the side wall opposite to the door 17; the air supply system 14 is installed Below the cooling system 13; the wire placement frame 15 is placed in the chamber, which should be placed directly below the precipitation system 12, and the air outlet of the air supply system 14 should be facing the wire placement frame 15; Holes 16 are provided on any side wall, and the number of holes is at least 2. The holes should not be too large, and should be larger than 5% to 10% of th...

Embodiment 2

[0031] The test method under the condition of using the above-mentioned experimental platform to test the dancing gale, the test schematic diagram, as figure 2 Shown: Include the following steps:

[0032] 1) Calculate the preliminary icing critical current value I of the conductor at a wind speed of 14m / s and a temperature of -3°C according to the empirical formula c

[0033]

[0034] I c is the initial icing critical current; R 0 is the resistance of the wire per unit length when the temperature is 0°C; d is the diameter of the wire; v is the wind speed; t 1 Conductor temperature (the temperature to ensure that the conductor does not freeze, generally take t 1 = 2°C); t 2 is the ambient temperature when freezing; ε i is the radiation coefficient. The icing test wire is LGJ-630, and the preliminary icing critical current value I is obtained under the wind speed and temperature c for 1880.77A.

[0035] 2) After the platform is installed, the test circuit is connected...

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Abstract

The invention discloses a fast ice melting and coating test platform under a strong wind galloping condition. The fast ice melting and coating test platform comprises a manual climate simulation room 1 and a galloping ice melting and coating test platform 2, wherein the galloping ice melting and coating test platform 2 comprises an ice coating test lead, connection cables, a connection conductor, a current rising and measuring system and a voltage regulator; an input end of the voltage regulator is connected with an AC power supply; an output end of the voltage regulator is connected with the input end of the current rising and measuring system; the output end of the current rising and measuring system is connected with the input end of the connection conductor; two output ends of the connection conductor are connected with the input ends of two connection cables separately; the output ends of the two connection cables are connected with the input end and output end of the ice coating test lead separately; the connection conductor, the two connection cables and the ice coating test lead form a closed loop; and one part of ice coating test lead is arranged in the manual climate simulation room 1. According to the test platform and the test method, the ice melting current of the lead under the strong wind galloping condition can be determined, a technical guidance is provided for the condition that the lead is frozen in strong wind in winter, and the probability of a disaster is reduced.

Description

technical field [0001] The invention relates to the technical field of electrical engineering, in particular to a rapid ice-melting test platform under the condition of dancing strong wind and a test method thereof. Background technique [0002] Transmission lines are prone to icing in winter due to rain, snow and freezing weather, and ice-covered transmission lines are prone to galloping under the action of strong winds. If the conditions for exciting line dancing are in a continuous and stable state, the dancing time in the dancing section can exceed 72 hours. Long-term, high-intensity continuous dancing is the main reason for extensive and serious damage to the line. If the dance is light, it will cause the line to trip, and if it is severe, it may cause serious consequences such as disconnection and tower collapse. [0003] The three factors that stimulate conductor galloping are conductor icing, wind excitation, line structure and parameters. Existing anti-galling mea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/003
Inventor 陆佳政朱思国李波谭艳军黄清军朱远毛新果
Owner STATE GRID HUNAN ELECTRIC POWER
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