Calibrator for function of interlarding alternating current into direct current of insulation monitoring device and application method thereof

Abstract

The invention discloses a calibrator for a function of interlarding alternating current into direct current of an insulation monitoring device and an application method thereof. The calibrator comprises an AC conversion unit, a DC conversion unit, a switching value input / output unit, a central control unit, a man-machine interaction unit, a ground resistance output circuit and a capacitor output loop. The ground resistance output circuit comprises a plurality of pure resistance branches arranged in parallel, and the central control unit is connected with an A / D conversion unit. The calibratorcan be used for completing the calibration of a function of measuring and recording of interlarding alternating current into direct current, the setting of an action threshold value and a fault response time of a transformer substation insulation monitoring device, a variable alternating-current power supply and a variable direct-current power supply are integrated in one body, the test wiring issimple, the calibrator is convenient to carry and can also be used as an independent variable power supply, the blank that no special equipment exists for verifying the functions of the insulation monitoring device at present is filled, and the reliable, efficient and convenient completion of the calibration work of the functions of the insulation monitoring device on site.

Description

technical field [0001] The invention relates to a calibration technology for calibrating an insulation monitoring device of a substation, in particular to an insulation monitoring device cross-channel function calibrator and an application method thereof. Background technique [0002] At present, the insulation monitoring devices produced by various domestic DC manufacturers have different functions, and most of them cannot detect faults such as simultaneous grounding of both DC poles and AC crossing into DC in real time. In field practice, there is also a lack of special qualified instruments for verifying the functions of insulation monitoring devices. In order to ensure that the function and reliability of the insulation monitoring device running on the substation grid is qualified and reliable, it is urgent to develop a special calibration instrument for the insulation monitoring device. Contents of the invention [0003] The technical problem to be solved by the pres...

AI Technical Summary

Problems solved by technology

[0002] At present, the insulation monitoring devices produced by various domestic DC manufacturers have different functions, and most of them cannot detect faults such as simultaneous grounding of both DC poles and AC jumping into DC in real time.

In the field practice, there is also a lack of qualified instruments for verifying the function of the insulation monitoring device

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