Aiming at the problems such as the lack of full-box metering equipment and the inability to monitor the running status of charging facilities in State Grid multi-epitome metering boxes,a guideway monitoring device based on Roche coil current sampling is designed,which adopts HC32F460 of Xiaohua Semiconductor and RN8302B micrometering chip.The external Roche coil is used for current sampling and the voltage is extracted from the Roche coil.The results show that the precision of Roche coil is 0.5S,the precision of base meter is C-level,and the precision of the whole machine is B-level.The interchangeability installation of Roche coil is supported,which can realize the electricity data monitoring of metering box and charging pile,promote the construction of the whole life cycle management mode of State grid charging facilities,and deepen the status evaluation of low-voltage watt-hour meters.
维普
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