A device and method for detecting the effectiveness of vertical grounding electrodes or deep well grounding

Abstract

The invention discloses a device and a method for detecting the grounding effectiveness of a vertical grounding electrode or a deep well. The output end of a multi-frequency excitation power supply 100 used for generating an excitation current forms a loop together with a copper rod electrode 130 and a to-be-measured power transmission tower grounding device 120. A signal control platform 210 is electrically connected with the multi-frequency excitation power supply 100, and is respectively in data connection with a data processing module 240, and a wireless communications module 250. A signal acquisition device 270 inputs a measured signal into the signal control platform 210 through a signal processing module 260 and the wireless communication module 250. According to the technical scheme of the invention, the excitation current is applied onto the power transmission tower grounding device, so that the main-frequency electromagnetic interference is effectively inhibited. The experiment result shows that, the device and the method are simple, convenient and feasible. The detection system is reliable and effective, and can be used for actual engineering.

Description

technical field [0001] The invention relates to the technical field of power system detection, in particular to a device and method for detecting the effectiveness of vertical grounding electrodes or deep well grounding. Background technique [0002] The safe operation of the transmission line directly affects the safety and reliability of the power system, and the integrity and reliability of the grounding device is the safety guarantee of the transmission line. In order to minimize the grounding resistance and improve the potential distribution on the ground surface, vertical grounding electrodes or deep well grounding are often driven deep into the ground on the horizontal grounding conductor. Vertical ground electrodes or deep well grounds are buried underground, mostly made of steel materials such as flat steel and round steel. Due to poor welding, missing welding, ground short-circuit current and electrodynamic force during construction, especially the severe corrosion...

AI Technical Summary

Problems solved by technology

[0003] At present, the detection methods for the effectiveness of vertical grounding electrodes or deep well grounding are mainly based on circuit theory. The fault diagnosis of grounding devices is realized by establishing fault diagnosis equations combined with corresponding optimization algorithms, and the computer solution of numerical models is realized through programming. However, this method The calculation is relatively complicated, and the diagnosis equation is highly ill-conditioned, which affects the diagnostic accuracy, and it is difficult to obtain identification and diagnosis by this method when there is only a slight fault in the grounding device

And the detection of the actual site is only for the measurement of the grounding resistance, and it is impossible to judge the fault location.

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