Fire response characteristic and physicochemical property profit-loss experimental platform for high-voltage transmission line

Abstract

The invention relates to a fire response characteristic and physicochemical property profit-loss experimental platform for a high-voltage transmission line. The experimental platform comprises a firesource generation and steel-reinforced aluminum conductor coupling effect module A, a mass loss and thermal field data acquisition module B1, a smoke characteristic and component analysis module B2, asteel-reinforced aluminum conductor surface state and mechanical and electrical performance characterization module B3, a line melt collection and analysis module B4 and a computer. The modules B1 toB4 are connected with the module A. All collected data are stored into the computer. The experimental platform has the following advantages: evolution properties of mechanical performances, electrical performances, and component phases of the steel-reinforced aluminum conductor before and after fire occurrence are explored systematically under the coupling effect of the transmission line during the mountain fire nonlinear coupling propagation process; the fired and damaged characteristics and mechanisms of the power transmission line are mastered precisely; the key influence factors and the behavior sequence of high-voltage transmission line tripping induced by the mountain fire are disclosed; and the experimental platform has the important engineering significance in disaster acting mode, characteristics, and mechanism analysis and implementation and prevention of the high-voltage transmission line under the mountain fire in smart grid high-voltage transmission.

Description

technical field [0001] The invention is a high-voltage transmission line fire response characteristics and physical and chemical property profit and loss experiment platform, which belongs to the technical field of mountain fire disaster prevention and control in the power transmission link of smart grids. Background technique [0002] In recent years, there have been more and more trips, power outages and outages due to breakdown and discharge of high-voltage transmission lines caused by wildfires across the country, and even the collapse of the power grid, which seriously threatens the safety and reliability of the power system. Steel-cored aluminum stranded wires for high-voltage (35-220 kV) and ultra-high-voltage (330-750 kV) transmission lines are prone to yield, loss or even break under the combined effects of high temperature, strong heat, thick smoke and flames of wildfires, and the surface charge of the line The distribution is changed by this, and it is easy to ind...

AI Technical Summary

Problems solved by technology

[0003] At present, the overall research in this field is relatively scattered, qualitative, and isolated. However, when the high-voltage transmission line is actually in operation or encounters a wildfire, there are problems such as the lack of line status monitoring and diagnosis. After the line is exposed to fire and heat, the surface temperature increases sharply and the sag increases. , strength reduction, melting deformation, fusing and dripping, charging disorder, resistance increase, and surface coverage of smoke and dust have brought new issues to the study of transmission line mountain fire disasters.

Existing experimental devices generally focus on the research on the air gap breakdown of transmission lines induced by wildfires, and seldom systematically explore the evolution attributes of mechanical properties, electrical properties, and organizational structures of high-voltage and above-voltage transmission lines before and after wildfires. Definition of coupling mechanism between fire nonlinear coupling propagation process and transmission line and characterization of evolution characteristics

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