Device and method for measuring dispersal impulse current characteristics of grounding electrode

Abstract

The invention discloses a device for measuring dispersal impulse current characteristics of a grounding electrode. The device comprises an impulse current generator, a hemispheric test flume, a simulated grounding electrode, a current sensor array, copper pins, a high-speed data acquisition card, a control and processing module and a display module. An input end of the impulse current generator is respectively connected with a 220V power frequency power source and a current injection point of the simulated grounding electrode through leads, the simulated grounding electrode is buried in the hemispheric test flume, the current sensor array is arranged at each point to be measured in soil around the simulated grounding electrode, the copper pins of the current sensor array are axially perpendicular to the simulated grounding electrode, a signal output end of the current sensor array is connected with an input end of the high-speed data acquisition card through a coaxial shielded cable, and the control and processing module is connected with the high-speed data acquisition card and the display module. The device is high in measurement efficiency of a dispersal impulse current rule of the grounding electrode and is simple, convenient and feasible in measurement process. The invention further discloses a method for measuring the dispersal impulse current characteristics of the grounding electrode by applying the device.

Description

technical field [0001] The invention relates to the technical field of auxiliary equipment for power transmission and transformation equipment, in particular to a device for measuring ground electrode impact dispersion characteristics. The invention also relates to a method for measuring the grounding electrode impact dispersion characteristic using the device. Background technique [0002] In the current power system operation and maintenance process, most power transmission and transformation line accidents are caused by tripping caused by lightning strikes on transmission lines or towers. By measuring the impact dispersion characteristics of the ground electrode, it is possible to comprehensively study the dispersion law of the ground electrode, and it is of great significance to scientifically improve the lightning protection effect of power transmission and transformation lines. [0003] In the existing grounding electrode impact dissipation characteristic measurement ...

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Problems solved by technology

[0003] In the existing grounding electrode impact dissipation characteristic measurement equipment, it usually adopts the method of simulation experiment to simulate the soil discharge process when the lightning current flows to the surrounding soil through the grounding device, and measures the distribution law of impact dissipation at each position , however, although this measurement method can meet the basic measurement requirements of impact dispersion characteristics, because it needs to repeatedly change the arrangement position of the sensor to test the relevant data of different areas, the operation process is more complicated, and the measurement efficiency is low, which will not give the follow-up data Inconvenience caused by handling and smooth execution of related processes

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