What is the catenary of high-speed rail? Why is catenary afraid of strong wind?

Catenary refers to an electromechanical system that provides traction power for electric traction devices through current collectors. Catenary is a special transmission line for electric locomotives. Rated voltage of catenary: 25kv. Due to the voltage and power loss of long-distance power supply, transmission lines and catenary, the terminal voltage of catenary is reduced. In order to make the terminal of catenary not lower than the minimum working voltage of electric locomotive, the rated voltage of bus traction substation is 27.5kV or 2*27.5kV, and the high-speed railway catenary is a special application form of catenary. "High-speed" itself is a relative concept, and "high-speed railway catenary" is a name corresponding to "ordinary railway catenary".

The stability of catenary equipment itself is relatively strong, and the existing problem is that there are too many external risk factors and it is unstable. The power supply department is responsible for managing the dust-proof net on the construction site, plastic greenhouses in rural areas, plastic packaging bags in the vegetable market, and even handling many light wind objects lurking along the kite line every year. "These foreign bodies are very mechanical and particularly difficult to control. After all, the railway is an open environment except for some tunnel sections, and there may be various dangers when crossing cities and villages. " It is reported that at present, for foreign objects disturbing the people, the railway department mainly relies on civil air defense, regularly deploys personnel, and conducts inspections on foreign objects through inspections and vehicle inspections.

Through the comparative analysis of satellite images, scientific research institutions are adding new "hidden" scenery around the railway, conducting research in advance and improving the prompting power. The railway department has made account books for the regular investigation of Favor Cai membrane along the line, but many engineering units and other buildings have become dynamic and the construction cost is low. "I didn't check it today, and I suddenly jumped out tomorrow." Some local government departments and construction enterprises are not aware of the "red line" and often fail to implement the strengthening measures correctly, resulting in security risks affecting railway operations. Once these foreign bodies invade, they can generally be solved in two ways. For larger foreign objects, the railway train should be stopped, the tram equipment should be closed, the power supply experts should be introduced into the railway protection network, and the corresponding safety measures should be taken before manual cleaning. Especially for larger foreign objects, it is often necessary to mobilize the catenary work car to assist in the work.

These tasks may take longer and have greater impact. For relatively small light wind objects, experts can manually deal with them by returning to the obstacle point by car, which is faster. In addition, if the particularly small foreign body has little influence on the operation, the pantograph can be used to strengthen the intrauterine operation, and after passing through the foreign body point, the influence on the operation can be reduced by lifting the bow and flowing.