1results about How to "Realize accurate judgment" patented technology

This disclosure provides a method and system for evaluating the operational status of electricity meters in a distribution area based on multi-node voltage differences. It belongs to the field of online status monitoring technology for electricity meters. The scheme constructs a model based on information from all electricity meters and line nodes in the distribution area. It pre-collects the output voltage and current signals of all electricity meters during normal operation, establishes a temperature calculation model function based on the conductor thermal balance equation, and uses an iterative method to determine the conductor temperature, thereby determining the conductor resistivity. After measuring the line length, it establishes the line resistance equation; after establishing the voltage equation at the nodes, it obtains the voltage difference state characteristic quantity; it establishes an offline state characteristic quantity dataset of voltage differences for all nodes in the entire distribution area; and it determines the operational status of the electricity meters by comparing the offline and real-time state characteristic quantity datasets. This invention fully utilizes the node voltage difference information of different lines in the distribution area to establish a characteristic quantity model and monitor the operational status of electricity meters in real time, effectively ensuring the accuracy and reliability of electricity metering in the power system.