Air switch is one of the most common secondary components in substation.Arbitrarily changing the secondary air switch status during operation not only often leads to unnecessary protection rejection,but also threatens the operational safety of primary equipment.This paper aims to address the issue of related secondary equipment failing to operate normally due to malfunction and tripping of secondary air switches in substations during normal operation.By utilizing the characteristics of air switches such as being able to pass current and being able to open and close multiple times,a new type of automatic reset air switch is designed based on MCU technology.The structural characteristics of this air switch are given,and the principle of automatic reset of air switches in different situations is analyzed.Through practical verification,the results show that the automatically reset air switch can quickly reset and close after the first misoperation of the air switch,restore the normal operation of the equipment,ensure the safe and stable operation of power grid equipment,reduce human resource waste,and improve work efficiency.
维普
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