Identification method of abnormal metering data of transformer under light load operating condition

Combined with the fact that the A-phase current of the smart electricity meter was reversed during operation, the metering personnel mistakenly believed that the polarity was reversed and then changed the wiring, causing the A-phase current polarity of the smart electricity meter to be reversed, resulting in abnormal operating parameters. This paper analyzes the methods for determining current reversal and proposes preventive measures to ensure the safe, accurate, and reliable operation of the smart electricity meter.