Abstract
Base on The characteristics of IT power distribution system in metal mine downhole, on the basis of the analysis and comparison of existing insulation monitoring methods, with the low-frequency power injection method, the online insulation monitoring instrument of the IT power distribution system is designed in the metal mine down hole. By injecting the low-frequency power in the IT power distribution system, urge Low frequency signal source and insulation resistance and ground make up of circuit, Real-time detect voltage and current in the circuit. Sampling signals filtered By means of hardware and software filter, extracting low-frequency voltage and current in the circuit, implement ON-LINE insulation monitoring of IT power distribution system. Proved by experiment, the instrument is highly accurate and can complete the insulation performance monitoring of the whole IT power system.
Published Version
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