Why are high-speed trains paralyzed in heavy snow, freezing rain, but green trains are fine?

recently,Extreme weather such as heavy snowfall and winter rain caused widespread paralysis of high-speed railways, causing many trains to slow down and stop running.However, the green train stood up in extreme weather and assumed the sacred mission of escorting passengers home. Hubei on February 4th,Some netizens took a picture of a green train speeding through the wind and snow on a stalled high-speed train, and called the "old-timers" of the Transportation Festival angry.

“This year, the green car was the first to arrive home.”

"Green Car: You used to be indifferent to me, but this time you can't reach it (it's hard to get a vote)"

"I only play high-end games, don't call me normally"

Then why is it that the high-speed train is delayed when there is heavy snow or freezing rain, but the green car is fine? This has to mention the "fear of freezing" problem that has plagued high-speed rail for many years.

Yesterday, Wuhan Railway issued a [Travel Notice in Freezing Rain and Snow Weather], mentioning three unfavorable factors:As a result, the railway contact network is covered with ice and has poor conductivity, the switches are inflexible due to icing, and the snow-covered lines cause trains to run at reduced speeds. The most "fatal" one is the poor conductivity of the railway contact network covered with ice.

Kuai Technology understands that our four common precipitation patterns are snow, rain, sleet, and freezing rain.The worst thing is freezing rain. When the rain falls, it freezes directly, causing the high-voltage wires above the high-speed rail to be covered with a thick layer of ice.

The high-voltage lines above the high-speed railway are technically called "catnets", and the racks above the high-speed railway that are in contact with the catenary are called "pantographs."When the pantograph is connected to the catenary, the high-speed rail can receive power when it is in a sliding state.

Once freezing rain occurs,The pantograph and the contact network on the high-speed rail will have poor contact, and the received current will be uneven, so the pantograph will have "sparks and lightning". Over time, the pantograph will be damaged.

In addition, addIce on the upper wheel rails affects braking, and high-speed trains can only travel at very low speeds. Some trains even have a power outage and stop in place.

Green cars still use internal combustion engines as power, mainly burning diesel, then driving a generator, and then using electricity to drive the wheels.. It does not rely on catenaries and is more adaptable to snowy weather. In addition, the speed of green trains is relatively low and the safety risks are relatively small, so it can still operate normally in snowy weather.

Netizens lamented that this "old-timer" can still show tenacious vitality at critical moments. Some people also say that the original thing is still reliable. It is not the green leather cars that have become independent, but the diesel locomotives that have become independent.