Cable fault coarse distance measurement method based on high voltage pulse method

Abstract

The invention discloses a cable fault coarse distance measurement method based on a high voltage pulse method. The cable fault coarse distance measurement method includes that a cable fault distance measurement system is constructed based on a LABVIEW virtual instrument developing platform. The system mainly includes a signal source device, a data acquisition card, and a computer. Firstly, the signal source device uses the high voltage pulse method to apply a certain voltage on a cable core by using echoing produced when the characteristic impedance of a transmission line changes, so that thecable core is not turned through to cause discharge; a discharge pulse is transmitted and reflected in a cable, information of a position proportional relation of an obtained reflected pulse is transmitted to the data acquisition card, the data acquisition card further transmits a signal to a computer for processing and storage, and then a result is displayed to obtain a fault location.

Description

technical field [0001] The invention relates to a cable fault distance measurement method in a power system, in particular to a cable fault rough distance measurement method based on a high-voltage pulse method. Background technique [0002] In order to improve the reliability of power supply, these increasing cable faults must be repaired in the shortest time. However, power cables are special transmission lines buried underground, and it is not convenient to directly observe and find fault points. If the location of the fault point cannot be found out in time, it will not be repaired, resulting in long-term power outages and production stoppages, which will bring huge economic losses and inconvenience to people's lives. Therefore, how to quickly and accurately determine the location of the fault point of the power cable is the premise guarantee for timely repairing the power cable and improving the reliability of power supply. How to choose the fault location method is a ...

AI Technical Summary

Problems solved by technology

[0002] In order to improve the reliability of power supply, these increasing cable faults must be repaired in the shortest time. However, power cables are special transmission lines buried underground, and it is not convenient to directly observe and find fault points.

If the location of the fault point cannot be found in time, it cannot be repaired, resulting in long-term power outages and production stoppages, which will bring huge economic losses and bring inconvenience to people's lives.