Platform for testing combustion characteristics of typical vegetations in power transmission line corridor

Abstract

The invention discloses a platform for testing the combustion characteristics of typical vegetations in a power transmission line corridor; the combustion characteristics of typical vegetation combustibles capable of enabling a power transmission line to be tripped are obtained; and data support is provided for analyzing a clearance breakdown mechanism under forest fire conditions. The platform is composed of the combustibles, an iron plate, a thermal insulation plate, a weight sensor, a mass display instrument, a thermocouple array, a thermocouple bracket, a transmission line, a temperature display instrument, a scaleplate, a DV camera, two electrodes, an insulation resistance tester and a conductor wire. According to the platform, combustion characteristic tests of the different vegetation combustibles can be conveniently carried out; the combustion characteristic quantities in the combustion process of the vegetations, such as flame height, flame temperature, fire intensity and flame resistance, are obtained; the data support can be provided for simulating a clearance discharging test under the forest fire conditions; and the platform is simple to operate and high in reliability.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, in particular to a test platform for combustion characteristics of typical vegetation in transmission line corridors. Background technique [0002] In recent years, with the expansion of the power grid scale, the number of transmission lines passing through mountainous and forested areas has continued to increase, and the threat of mountain fires caused by villagers burning wasteland and offering sacrifices near the line corridors to the safe and stable operation of transmission lines has also increased. Wildfire is a high-temperature, multiphase weak plasma containing solid and liquid particles of different particle sizes. The gap discharge mechanism in wildfire is more complicated than that in air, involving the synthesis of various influencing factors such as temperature, conductivity, particles and ash. effect. The high temperature of the flame reduces the air density, incre...

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Problems solved by technology

The high temperature of the flame reduces the air density, increases the average free path of electrons, and correspondingly reduces the field strength required for the development of the streamer; the chemical reaction that occurs when the vegetation burns and the charge generated by the thermal ionization of inorganic salts in the vegetation under the high temperature of the flame Particles greatly increase the conductivity of the flame, which is conducive to the development of inflow. At the same time, the particles and ash produced by vegetation combustion trigger discharge, distort the electric field, and make the gap easier to break down; Tripping accidents are prone to occur under fire conditions

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