Transmission line tower ground resistance testing system and method based on two-pole method

Abstract

The invention discloses a transmission line tower ground resistance testing system and method based on a two-pole method. The system comprises a tower to be tested, and a plurality of tower legs are arranged at the bottom of the tower to be tested. The system is characterized in that an auxiliary pole F1 (8), an auxiliary pole F2 (9) and a ground resistance testing device (7) are further included; the auxiliary pole F1 (8) and the auxiliary pole F2 (9) are buried outside a tower grounding grid; in the measuring process, the auxiliary pole F1 (8) and the auxiliary pole F2 (9) are connected with a voltage feedback port P1 and a voltage feedback port P2 of the ground resistance testing device (7) through ground leads respectively, and a grounding grid connecting line of the tower legs to be tested is connected to a current output port E of the ground resistance testing device (7). According to the transmission line tower ground resistance testing system and method, carrying is convenient, line paying off is avoided, limit of the use range is avoided, and the problem that in the prior art, a measuring result is prone to interference is solved.

Description

technical field [0001] The invention relates to the field of high-voltage technology, in particular to a system and method for testing the grounding resistance of transmission line poles and towers based on the two-pole method. Background technique [0002] The grounding of transmission line poles and towers is very important to the safe and stable operation of the power system. Poor grounding of poles and towers will cause lightning accidents and cause line tripping. Grounding resistance measurement is a necessary means to check whether the grounding device meets the requirements of the regulations. Accurate measurement of grounding resistance can verify whether the design of the grounding system is reasonable, detect changes or defects in the grounding system in time, and avoid economic losses or accidents that may be caused by unqualified grounding. In order to ensure that the grounding resistance meets the design requirements, the "Operation Regulations for Overhead Pow...

AI Technical Summary

Problems solved by technology

This method requires auxiliary laying of current electrodes and voltage electrodes, and the layout position and self-resistance of the auxiliary electrodes have a great influence on the test results; some tower locations may not have the space for arranging auxiliary ground electrodes, resulting in the failure of the test; a large number of tests must be carried during the test Lines and related tools, low efficiency, inconvenient testing

The latter representative instrument is the clamp meter. The clamp meter method uses the nearby pole tower as the loop, and tests the loop resistance through the induced current. This method is convenient for testing and is used in some practical applications, but this method is less affected by the connection mode of the lightning conductor. Large, and weak anti-interference ability, the accuracy is low in practical applications

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