Running state evaluation of electric energy meter

The measuring accuracy of electric energy meter is not only related to the normal operation of power system, but also related to the vital interests of users. So the appropriate evaluation of its running state is particularly important. In this paper, according to its working principle and running characteristics, various influence factors of its operating error are summarized. Combining the online and offline information and taking the actual running environment of power grid into consideration, the evaluation index are selected to build a comprehensive running state evaluation index system based on the environment, importance and reliability, which can provide theoretical reference for the current electric energy metering device management.