At about 2 p.m. yesterday, the equipment outside the Huizhen Road Station of Shanghai Metro Pujiang line was struck by lightning, which caused the switch failure of the station, accompanied by abnormal noise, smoke and sparks. At the time of the incident, there was no train passing through the site and no person was injured. The trains of Pujiang line run at a speed limit and the departure interval is extended. What is the cause of the lightning stroke on Shanghai subway station this time? Are there any casualties?
According to preliminary judgment, the main reason is that in this afternoon's short-term strong convective weather, the power supply track was hit by lightning and caused the failure.
Urban rail transit beware of lightning
Lightning is a kind of natural disaster weather. Urban rail transit communication system, signal system, integrated monitoring system, automatic fare collection system, automatic fire alarm system and other systems have high degree of integration and automation, high equipment sensitivity and poor immunity. Once a building is directly hit by lightning or a nearby area is hit by lightning, the generated over-voltage and electromagnetic pulse will pass through the power supply line Communication lines, receiving antennas, space electromagnetic induction and other ways intrude into the building to produce instantaneous high voltage and large current, which will affect the stable operation of intelligent equipment and precision equipment such as network system, server, computer, signal relay interlocking, automatic block between sections, and even cause equipment damage and affect the safe operation of subway. Therefore, it is necessary to pay more attention to lightning disaster and take effective protective measures.
At present, lightning accidents happen frequently in domestic and foreign subway. It is of great significance to do a good job in the prevention of lightning protection and disaster reduction, and strengthen the detection of lightning protection in subway to reduce the property loss and social impact caused by lightning.
Affected by the strong convective weather, at about 2:00 p.m. on April 9, the equipment outside Huizhen Road Station of Pujiang line was struck by lightning, resulting in the switch failure of the station, accompanied by abnormal noise, smoke and spark. At the time of the incident, there was no train passing through the site and no personnel were injured.
Affected by this, the trains of the whole Pujiang line run at a speed limit and the departure interval is extended. After the incident, the operator quickly launched the emergency plan to ensure the train operation of the whole Pujiang line by adjusting the operation route.