Detection system and detection method for non-contact power failure line earthing position

Abstract

The invention relates to a detection system and a detection method for a non-contact power failure line earthing position. The detection system comprises a direct current power source, a square wave generation circuit, a first primary coil, a first secondary coil, a second primary coil, a second secondary coil, a signal sampling circuit and a master control chip, wherein the square wave generationcircuit pushes the first primary coil after the direct current power source is switched; the first secondary coil carries out square wave power supply voltage reduction, and the square wave power supply subjected to voltage reduced is supplied to the second primary coil; the port of the second primary coil and the port of the first secondary coil are connected to a power transmission line; if thepower transmission line is not provided with an open circuit, the second primary coil forms a closed loop circuit, the second secondary coil generates induction current, the induction current is converted into a voltage signal through the signal sampling circuit, and the voltage signal is transmitted to the master control chip; finally, the master control chip judges whether an alarm indicator lamp and a buzzer are driven or not, and in addition, the impendence value of the power transmission line is displayed on a liquid crystal display screen. Non-contact detection is adopted in a whole course, and the detection system has the advantages of simpleness in operation, safety and high efficiency.

Description

technical field [0001] The invention relates to a non-contact detection system and a detection method for the grounding position of a power failure line, belonging to the technical field of power system detection. Background technique [0002] Newly built or reconstructed transmission lines need to check the phases before power transmission to check whether there is grounding, disconnection, and whether the phases on both sides are consistent. This is happening more and more often. When performing a phase check on one line, while other lines are running, the induced voltage of the tested line may reach thousands of volts or even tens of thousands of volts. For traditional phase check instruments, it is easy to cause damage to the instrument, and it is harmful to the test personnel. There are also great security risks. Therefore, new test systems and methods are urgently needed to ensure the smooth progress of the test. Contents of the invention [0003] One of the objec...

AI Technical Summary

Problems solved by technology

[0002] Newly built or reconstructed transmission lines need to be checked for grounding, disconnection, and whether the phases on both sides are consistent through phase verification before power transmission. more and more frequent

When conducting phase verification on one line, while other lines are running, the induced voltage of the tested line may reach thousands of volts or even tens of thousands of volts. For traditional phase verification instruments, it is easy to cause damage to the instrument, and it is harmful to the test personnel. There is also a great security risk

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