Externally applied signal recognition type fault indicator and fault location method

Abstract

The invention discloses an externally applied signal recognition type fault indicator. The externally applied signal recognition type fault indicator comprises an acquisition unit arranged on a circuit and a collecting terminal in communication connection with the acquisition unit, the collecting terminal is used for collecting data sent by the nearby acquisition unit and reporting the data to a background, and the acquisition unit comprises a CT electricity taking device, a power management module, an MCU, a wireless communication module, an analog sampling module, a fault logic judgment module and an alarm, wherein the CT electricity taking device is used for supplying power, the power management module is connected with the CT electricity taking device, and the wireless communication module, the analog sampling module, the fault logic judgment module and the alarm are connected with the MCU separately. The invention further discloses a grounded short circuit location method which can locate accurate fault location points. The externally applied signal recognition type fault indicator and the grounded short circuit location method have the advantages that fault lines and fault points can be quickly indicated, the labor intensity of line patrol walkers is reduced, and the troubleshooting time is shortened; the duration of power outage is reduced, and the power supply quality is improved so as to avoid the impact of traditional multiple switching-off, switching-on and line patrol on power equipment; the line fault indicator directly detects signals online, thereby not affecting the normal operation of a power grid, the movement is sensitive and accurate, and the anti-interference capability is strong.

Description

technical field [0001] The invention relates to the field of fault indicators, in particular to an external signal identification type fault indicator and a fault location method. Background technique [0002] Since my country's power lines are built in remote mountainous areas, and the 10kv and 35kv lines operate in a neutral point ungrounded mode, once a fault occurs and the power is cut off, it will be difficult to find it. The search for ground faults has always been a headache for the power sector. In addition to the diversity and complexity of ground faults in real life, it is even more difficult to find ground faults, which brings great inconvenience to the lives of the people. The normal operation of the enterprise also caused great losses to the power supply bureau. [0003] In my country's urban and rural distribution networks, a large part of the distribution network overhead transmission lines are used. However, due to the many branches and complex structure of...

AI Technical Summary

Problems solved by technology

However, the use of these devices has limitations, and it is time-consuming and laborious to implement. The small-current grounding line selection equipment can only help to select lines and determine the line where the grounding occurs, but cannot determine the location of the grounding. Very limited help in finding ground faults with little benefit

Images