With the continuous improvement of modern power systems

battery energy storage

as the core to alleviate the fluctuation issues of renewable energy

has seen a continuous increase in its grid-connected scale. Electric energy metering is crucial for grid settlement and energy efficiency evaluation of energy storage systems. However

the battery energy storage grid-connected scenario involves multiple factors

leading to comprehensive errors in electric energy metering. In response to this issue

this study provides a comprehensive review of electric energy metering errors and related traceability correction strategies in the battery energy storage grid-connected scenario. The comprehensive errors are decomposed into three core components: current transformer (CT) errors

potential transformer (PT) and secondary voltage drop errors

and electric energy meter errors. Then

combined with relevant online measurements and cross-validation calculations

error traceability is achieved. Finally

correction strategy processes are proposed for different error types

providing theoretical insights for the precise research on electric energy metering in battery energy storage grid-connection.