Smart meter is the most important part of the electricity information collection system. Its operating status directly affects the operation of the entire system. It is necessary to analyze the influencing factors of the running status of smart meter. This paper first analyzes the typical dynamic load current ripple characteristics. Establishing the structure and simulation model of smart meter. Then analyzing the impact of different run-length fluctuation characteristics of high-speed railway and steelmaking electric arc furnace load current on the dynamic error of smart electricity meter status.