Ground fault detection system and detection method

Abstract

The invention relates to the technical field ofelectric power fault detection, and discloses a ground fault detection system and method. The ground fault detection system comprises a plurality of signal transceiving terminals in signal connection with one another, a control terminal, and a drone. The method comprises the steps that a test signal is injected into anelectric power circuit through the signal transceivingterminals, a back end signal transceivingterminal adjacentto the signal transceivingterminals detects the test signal and sends feedback information to the signal transceiving terminals, so that the signal transceiving terminals determine a faulty section where a ground fault occurs and feeds back position information of the faulty section to the control terminal; andthen thecontrol terminal injects the test signal into the faulty section by controlling the drone to accurately detect the faulty section and locate the fault location where the ground fault occurs. The procedure of the ground fault detection method is automatically executed by the control terminal, the drone, and the signal transceivingterminalsarranged in the electric power circuit,the detection processis safe and reliable, the fault location where the ground fault occurs can be located more quickly, efficiently, and accurately, so that the ground fault can be eliminated as early as possible,and more significant losses are avoided.

Description

technical field [0001] The invention relates to the technical field of power fault detection, and relates to a ground fault detection system cabinet and a detection system. Background technique [0002] At present, most of the power supply systems of my country's distribution network and large industrial and mining enterprises use low-current grounded power grids. When the system supplies power, it is easy to cause ground faults due to natural disasters or equipment aging. [0003] When a single-phase ground fault occurs in a small-current grounded power grid, the ground voltage of the non-faulted phase will rise to the normal voltage times, if an intermittent arc ground fault occurs, it will also cause a higher overvoltage, which poses a threat to the weak link in the power grid. If the ground fault exists for a long time, it will lead to the occurrence of short circuit fault, therefore, the fault line should be found and eliminated as soon as possible. Contents of the ...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the power supply systems of my country's distribution network and large industrial and mining enterprises use low-current grounding grids. When the system supplies power, it is easy to cause grounding faults due to natural disasters or equipment aging.

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