Method for measuring state-of-charge of vegetation combustion particles in simulated power transmission line electric field

Abstract

The invention belongs to the technical field of power transmission line safety analysis, and discloses a method for measuring state-of-charge of vegetation combustion particles in a simulated power transmission line electric field. A typical vegetation material is selected. A simulated lead electrode is configured at the upper part and voltage is applied. The state-of-charge and mass of the vegetation combustion particle are collected and measured. Furthermore the charge mass ratios of particles with different particle sizes are obtained through sieve plates with different apertures, and the total charge characteristic of the vegetation combustion particle can be obtained. According to the method, different insulating sieve plates are used for sieving the particles, and the particle chargecharacteristics in different particle diameter ranges are obtained through multiple measurements, thereby facilitating analysis of electric field distortion characteristic of the combusted charged particle of the vegetation. The method can simulate the vegetation condition in a mountain fire condition in a relatively good manner, and furthermore a unified vegetation mass and configuration mode are adopted, thereby preventing combustion uncertainty or new material introduction caused by other ignition modes, and ensuring high equivalence and repeatability of a testing condition.

Description

technical field [0001] The invention belongs to the technical field of safety analysis of power transmission lines, and in particular relates to a method for measuring the charged quantity of vegetation burning particles under the electric field of simulated power transmission lines. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] With the rapid development of the power grid, the transmission line corridor is increasingly tense, and the transmission channel inevitably passes through the high forest fire risk area with lush vegetation. Wildfires may cause the phase-to-phase and phase-to-phase insulation strength of the transmission line to decrease, resulting in tripping accidents. According to statistics, in recent years, there have been hundreds of tripping accidents in my country's power grid due to wildfires. In the spring of 2014 alone, lines above 220kV in the State Grid were affected by wildfire...

AI Technical Summary

Problems solved by technology

In the existing technology, it is difficult to distinguish particles in different particle size ranges, and it is impossible to effectively obtain the charging characteristics of different vegetation particles

[0007] (2) Existing test and research platforms for simulating the gap discharge of transmission lines caused by wildfires mostly focus on the discharge voltage and leakage current of the gap, but lack the measurement test of the particle charge

Electrostatic dust removal is to generate charges through the discharge of the tip of the electrode, which is adsorbed on the dust particles during the movement of the charges to the opposite polar plate. The particle charge collection is not suitable for the mountain fire situation under the transmission line

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