Estimation of damage rate of electronic watt-hour meters caused by transient magnetic field due to direct lightning strokes to distribution line

Abstract

In Japan, the introduction of smart meters into distribution systems has recently been accelerating. Since smart meters are low-voltage electronic equipment, they are considered to be vulnerable to disturbances such as lightning surge. In this study, we first experimentally examined the lighting failure of smart meters caused by a transient magnetic field. Then, we calculated the lightning damage rate of a smart meter due to a magnetic field by lightning surge analysis. To improve the lightning performance of smart meters, it is effective to ensure a suitable relationship between the bus conductor and the processing unit inside the smart meter.