China News Agency, Beijing, June 28th (Reporter Zhou Yin) China Railway Electrification Bureau reported that on the 28th, China's first set of 600km/h high-speed maglev dedicated traction transformer was off-line at the China Railway Electrification Bureau Baoding Rail Transit Industrial Park and shipped to Qingdao Site of Sifang Maglev Train Test Line. This marks a breakthrough in the development of China's high-speed maglev traction power supply equipment. The high-speed maglev with a speed of 600 kilometers per hour has its own dedicated "heart".
The transformer is off-line and loaded. (Photo by Sun Jinsong)
China Railway Electrification Bureau said that the high-speed maglev of 600 kilometers per hour is a key special project of the national "13th Five-Year Plan" key research and development project-"Advanced Rail Transit". Its traction power supply system adopts "AC-DC-AC" converter power transmission technology. After "input-rectifier-inverter-output", it converts 35 kV power frequency power supply into variable frequency power supply, which is a 600 km/h maglev train Provide reliable electrical energy.
The chief engineer of China Railway Electrification Bureau Industrial Company responsible for the R&D project, Chai Shuying, introduced that as a key device of the high-speed maglev traction power supply system, China Railway Electrification Bureau independently developed a special levitation transformer for maglev, consisting of a rectifier input transformer and a traction The output transformer is composed. The rectifier input transformer is the "chief diplomat" of the entire traction power supply system. It is responsible for taking power from the 35 kV external power grid and stepping down it to 3 kV AC, which plays the role of stepping down, rectifying and isolating. The product uses magnetic shielding technology, high impedance voltage and large current, which can effectively reduce stray losses and eddy current losses, and improve power supply efficiency.
The traction output transformer is the "CEO" that drives the maglev train forward. It has a "dual working mode" of reactor output and transformer output, which can meet the power requirements of the train with varying frequencies of 0-356Hz at different speeds.
Chai Shuying emphasized that the high-speed maglev traction transformer with a speed of 600 kilometers per hour has the performance characteristics of adapting to the frequency conversion conditions and the variable voltage and current traction power supply. And major technical support. (Finish)