ADAPTIVE MONITORING METHOD FOR GROUNDING CURRENT OF POWER CABLE

摘要

An adaptive monitoring method for a grounding current of a power cable. The method comprises the steps of: setting a sampling reference; determining an impact factor set of sampled data; sampling a grounding current by a monitoring system for a grounding current of a power cable in real time; conducting digital filtering on data of the grounding current which is sampled in real time; processing the filtered sampled data using an adaptive algorithm; and uploading the processed sampled data to a background monitoring device for real-time monitoring. The method is different from an existing method in which a monitoring time interval is directly taken as a data sampling frequency. By means of the method, the problems that the energy loss is large and the amount of data monitoring information is small in a monitoring process can be solved, so that more than 50% of power consumption of a monitoring device can be effectively reduced, about 20% of resource occupancy of a server can be reduced, and the efficiency of external insulation state evaluation for a cable can be improved. Proposed is a new magnitude dividing standard, which can be combined with an actual operation line to conduct dynamic correction, and can effectively reduce objective interference in a process of weight determination, thus having higher monitoring accuracy.