Gap discharging test device for manually simulating strong wind and sand storm and test method

Abstract

The invention discloses a gap discharging test device for manually simulating strong wind and sand storm and a test method, wherein the test device comprises a flow field subsystem, an electric field subsystem and a measuring subsystem. In the test process, a sand sample is firstly placed in a sand sender; then the power frequency puncture voltage of the gap between electrodes is measured under the environment of clean air, next, a gap puncture discharging test is performed under the condition with different wind speeds and sand concentrations; a pressurizing method adopts a gradually pressurizing method, and a group of puncture voltages and concentration values are recorded after the puncturing happens; the pressurizing is repeated, each group of tests are repeated again and again to reduce the measuring error, and meanwhile, the sand flow temperature is recorded to be used as a reference. The invention can be used for performing the power frequency puncture of a gap on a transmission line under the environment of strong wind and sand storm and researching the discharging rule, has low cost, simple installation, good stability in the test process, easy operation, and the like.

Description

technical field [0001] The invention relates to an air-gap discharge test device and a test method, in particular to an air-gap discharge test device and a test method for studying power transmission lines under harsh weather conditions. Background technique [0002] In recent years, frequent sandstorms have seriously affected industrial and agricultural production and people's lives in northern my country and even in larger areas, especially for high-voltage power grid line insulators. For example, on June 10, 2006, a large-scale flashover accident occurred in the power grids of Bayannur City and Hohhot City in Inner Mongolia under the strong dust climate, causing a total of 5 220kV lines and 2 110kV lines to trip 15 times. The day before, A similar grid failure occurred in the Xinjiang power grid. According to statistics, in the past 10 years, there have been more than 20 power grid accidents caused by ground faults in the 330kV lines under the jurisdiction of Lanzhou Pow...

AI Technical Summary

Problems solved by technology

For the field of external insulation of power equipment, this indicates whether the insulation structure designed with reference to conventional factors can continue to be suitable for strong wind and sand (storm) environments, and whether it can w

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