Single-phase instant artificial grounding short-circuit test system for power transmission line

Abstract

The invention relates to a single-phase instant artificial grounding short-circuit test system for a power transmission line, and belongs to the technical field of high-voltage test equipment and measuring. The single-phase instant artificial grounding short-circuit test system comprises metal downleads, a metal arc striking line, a current transformer, a measuring instrument and the like. The two metal downleads are connected with an overhead line of the power transmission line respectively, and a metal bar is fixed between the two metal downleads. A traction insulation rope is connected with a line collecting device, the other end of the traction insulation rope is connected with the metal arc striking line, the metal arc striking line is connected with a power transmission tower through a grounding connecting line, the grounding connecting line is laid on a metal plate, the current transformer is connected to the grounding connecting line in series and is laid on an insulating plate, and a secondary side is connected with the measuring instrument. The single-phase instant artificial grounding short-circuit test system has the advantages of being simple, convenient and good in safety, line collecting is conducted in a power-driven mode, and it is guaranteed that only instant artificial grounding short circuit can be made in the test without continuous failures, and safe operation of a power grid is not affected.

Description

technical field [0001] The invention relates to a single-phase instantaneous artificial ground short-circuit test system for transmission lines, which belongs to the technical field of high-voltage test equipment and measurement. Background technique [0002] The single-phase instantaneous artificial grounding short-circuit test is mainly to assess the control and protection functions and characteristics of the transmission line and series compensation, and to test whether the protection and reclosing action after the line fault is correct, which is of great significance for verifying the safety and reliability of the power system. The purpose of single-phase instantaneous artificial grounding test is: [0003] (1) Check the action behavior of the discharge gap when the line series compensation device has an internal line fault and an adjacent line series compensation has an out-of-area fault; [0004] (2) Measure the action behavior and absorbed energy of MOV during short-...

AI Technical Summary

Problems solved by technology

[0009] (1) The structure of the artificial remote control electromagnetic ejection test device is complicated, and electromagnetic energy is used to push the warhead to carry the thin copper wire to move forward. The whole device is expensive and the test site is large.

[0010] (2) The artificial remote control electromagnetic ejection test device needs to launch the warhead carrying the thin copper wire into the metal test gate frame during the test, so there are certain uncertain factors in the process. If the warhead does not enter the metal test due to device failure or operational reasons If not inside the door frame, but lapped on other wires, it may cause equipment damage or personal injury

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