Detection device for transmission lines

Abstract

The invention relates to the technical field of transmission line safety, and especially relates to a detection device for transmission lines. The detection device comprises a signal generator, a power amplifier, a filter and a dual trace oscilloscope, wherein an initial signal generated by the signal generator is synchronously transmitted to the power amplifier and the dual trace oscilloscope, the power amplifier amplifies the initial signal and then outputs the amplified initial signal to a transmission line CT drainage wire to access to a transmission line, the traveling wave propagates inthe transmission line, the transmission line generates a reflected wave which serves as a feedback signal at another transmission line CT drainage wire and is transmitted to the filter for filtering,the filter transmits the feedback signal to the dual trace oscilloscope, and the dual trace oscilloscope carries out comparative display on the feedback signal and the initial signal. The operation condition of the transmission line can be effectively judged by using the device, and whether the transmission line is disconnected or grounded or not is visually presented by directly using the data without the intervention of the staff.

Description

Technical field [0001] The present invention relates to the technical field of safety of power transmission lines, in particular to a detection device for power transmission lines. Background technique [0002] The high-voltage transmission line is placed in the field and needs to be inspected and repaired every year. When the power is cut off, the staff needs to install temporary grounding wires on each side of the line, and then remove them after the work is completed, and then report to the dispatcher on duty. Frequently, due to various reasons, the staff missed to remove the ground wire or the line was working but did not notify the dispatch in time, resulting in the vicious misoperation of the line with the ground wire and closing. At the same time, after the line fails to trip and reclose, the dispatcher can force it once according to the dispatching regulations. If the high-voltage line is disconnected or the high-voltage line is grounded, it will trip again. The huge inru...

AI Technical Summary

Problems solved by technology

[0002] The high-voltage transmission line is placed in the wild, and needs to be repaired and repaired every year. When the staff is out of power, they need to install temporary grounding wires on each side of the line, and then remove it after the work is over, and then report to the on-duty dispatcher. Then Often due to various reasons, the staff neglected to remove the grounding wire or the line was working without notifying the dispatch in time, resulting in vicious misoperation events in which the line was closed with the grounding wire

At the same time, after the line fails to trip and reclose, the dispatcher can send it once according to the dispatching regulations. If the high-voltage line is disconnected or the high-voltage line is grounded, it will trip again, and the huge impact current will affect the entire system. impact damage to a line and station end equipment, and even cause a malfunction or leapfrog action of the protection, thereby expanding the scope of the accident

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