Grounding network fault diagnosis method based on injection current type multi-field coupling and grounding network fault diagnosis device based on injection current type multi-field coupling
A fault diagnosis device and technology for fault diagnosis, applied in directions such as fault locations
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[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0022] Such as figure 1As shown, the grounding grid fault diagnosis method of the injection current type multi-field coupling of the present invention is based on the principle of the injection current type multi-field coupling, injecting a pulse current into the grounding grid, and after the pulse current is injected into the grounding grid, the pulse current and the pulse magnetic field are excited. Under the joint action of current and pulsed magnetic field, force sound sources, including Lorentz force and other force sound sources, are generated. Receive the acoustic signal excited by the force sound source, extract the abnormal signal, and judge the different states of the grounding grid in good condition, corrosion and fracture through the characteristics of the acoustic signal, and realize the fault diagnosis of the grounding grid.
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