Transmission line tower grounding network running situation online monitoring device

Abstract

The invention discloses a transmission line tower grounding network running situation online monitoring device, which consists of a solar panel (1), a charging controller (2), a storage battery (3), an asynchronous response mode9 (ARM9) processor (4), an oscillator (5), a power amplifier (6), a power supply coil (7) and an analog / digital (A / D) converter (9), which are sequentially connected with one another, wherein the ARM9 processor (4) is also connected with a general packet radio service (GPRS) communication module (8) in a wireless way. One end of a measurement coil (10) is connected with the power supply coil (7), and the other end of the measurement coil (10) is connected with the A / D converter (9). When in use, the GPRS communication module (8) inputs a measurement result into a remote monitor control center server, the tower grounding status security assessment can be obtained through the analysis of a computer so as to instruct the grounding maintenance of the tower. Due to the adoption of the online monitoring device, (1) online remote monitoring in the control center can be realized; (2) instruction can be provided for the running maintenance of a transmission line tower grounding network; and (3) no negative influence is caused.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and in particular relates to an online monitoring device for the operation status of a power transmission line tower grounding grid. Background technique [0002] Overhead transmission lines are located in the wilderness and stretch for hundreds of kilometers to thousands of kilometers. They are prone to lightning strikes and cause tripping and power outages. According to the classification statistics of my country's power grid faults, the number of trips caused by lightning strikes accounts for 40% of the total number of trips in the operation of high-voltage lines. 70%. Reducing the grounding resistance of transmission line towers is the main measure to improve the line lightning protection level and reduce the line lightning tripping rate. In actual operation, due to reasons such as corrosion, artificial damage, and irregular construction, the grounding downconductor of the tran...

AI Technical Summary

Problems solved by technology

In actual operation, due to reasons such as corrosion, artificial damage, and irregular construction, the connection of the grounding downconductor of the transmission line tower is poor, causing a sharp increase in the grounding resistance, thereby increasing the line lightning trip rate

For the inspection and judgment of grounding down-conductor faults, the current method usually used is: maintenance personnel observe the corrosion of the grounding lead on the surface of the ground with naked eyes, and shake the grounding lead vigorously to observe whether the shallow part below the ground is broken. This method is fundamental It is impossible to judge the corrosion condition and degree of corrosion inside the anti-rust layer of the lead wire, and it is even more helpless for the corrosion situation below the surface of the ground lead wire; and for the partially corroded ground down conductor, if it is shaken vigorously, the soil on the surface will be looser, thus lead to accelerated down-conductor corrosion

However, so far there is still no facility dedicated to monitoring and evaluating the grounding status of transmission line towers.

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