Short-distance cable fault ranging system and ranging method with low-voltage pulse method

Abstract

The invention discloses a short-distance cable fault ranging system and a ranging method with a low-voltage pulse method. The short-distance cable fault ranging system comprises a single chip microcomputer control module, a keyboard input module, a display screen module, a pulse generation circuit, a pulse delay circuit, a high-speed acquisition module, a PC processing module, a power supply and a tested cable, wherein the single chip microcomputer control module, the keyboard input module, the display screen module, the pulse generation circuit, the pulse delay circuit, the high-speed acquisition module and the PC processing module are respectively connected with the power supply; the single chip microcomputer control module is connected with the keyboard input module, the display screen module, the high-speed acquisition module and the pulse generation circuit respectively; the pulse generation circuit is connected with the pulse delay circuit; the output end of the pulse delay circuit is connected with the high-speed acquisition module and the tested cable respectively; the high-speed acquisition module is connected with the PC processing module. By adopting the short-distance cable fault ranging system, blind test areas can be effectively reduced, and thus the cable fault ranging accuracy degree can be relatively high.

Description

technical field [0001] The invention relates to a cable fault ranging system, in particular to a low-voltage pulse method short-distance cable fault ranging system and a ranging method. Background technique [0002] With the rapid development of our country's economy, the power grid has gradually undergone reforms, and power lines have gradually realized cableization. As cables are used more and more widely, cable failure problems will continue to occur. In order to better solve a series of problems caused by cable faults, it is particularly important to accurately grasp the fault distance of cables. Currently, the traveling wave method is the most effective method for cable fault location. By injecting pulses into the cable under test, detecting the time difference between the incident pulse and the reflected pulse, and combining the traveling wave velocity of the cable, the fault distance of the cable can be obtained. Such as pulse current method, pulse voltage method, ...

AI Technical Summary

Problems solved by technology

However, when it is a short-distance cable, there will often be a blind zone, which will cause a large deviation in the measured distance

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