A ground network conduction comprehensive tester

Abstract

The invention discloses a ground network conduction comprehensive tester, which belongs to the technical field of ground network conduction test. A ground network conduction comprehensive tester comprises an AC current source, an ammeter, a voltmeter, four test terminals, a pair of The current line and a pair of voltage lines, the four test terminals include test terminal 1, test terminal 2, test terminal 3 and test terminal 4. The present invention innovatively uses the interference source as the test source to avoid the influence of interference, and the interference source Equivalent to a voltage source U and the equivalent circuit of the internal resistance R0, the greater the interference, the more accurate the test is achieved in the test, effectively avoiding the adverse effects of interference, and improving the measurement of the ground network conduction resistance under interference Accuracy, to achieve a comprehensive assessment of the state of the regional ground network, to determine the weak link of the ground network, and to accurately monitor the strong interference area to propose precise measures, and to provide targeted and precise measures to reduce the interference of the ground network.

Description

technical field [0001] The invention relates to the technical field of ground grid continuity testing, and more specifically, to a ground grid continuity tester. Background technique [0002] The reliable and effective connection between the grounding wire of the power equipment and the ground grid is the fundamental guarantee for the safe operation of the power equipment. The grounding lead wire is the connecting part of the power equipment and the ground grid. During the long-term operation of the power equipment, the connection may be affected by factors such as moisture, and the contact may be corroded or even broken, resulting in the connection point between the ground lead wire and the main ground grid. The resistance increases, so that it cannot meet the requirements of the electric power regulations, so that there are hidden dangers in the operation of the equipment, and in severe cases, it will cause the equipment to run without ground. Moreover, electromagnetic in...

AI Technical Summary

Problems solved by technology

[0006] 2. The method of optimizing the ground network is not perfect

[0007] Existing ground network evaluation generally uses on-resistance, grounding impedance, etc. as the measurement basis. After the test results come out, use professional software to simulate them to judge whether there are defects in the ground network. This method is not intuitive.

And the existing measures generally analyze the fault current, but in some high-interference areas, the interference current is too large during normal operation, resulting in excessive ground network loop current, excessive secondary cable shielding layer loop current, burning out the ground grid, and burning out Events such as cable shielding occur from time to time

However, the ground network in this part of the area lacks special testing tools and optimization methods

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