China has achieved 600km high-speed maglev system, once again leading the global rail transit
Source: hengfengyou electric Author: Martin time: 2021-07-20
China, the real global leader in global infrastructure construction, once again attracts global attention!On July 20, 2021, the 600 km / h high-speed maglev transportation system developed by CRRC and with completely independent intellectual property rights was successfully launched in Qingdao, Shandong Province, China.According to the introduction of Qingdao hengfengyou electrical engineer, in July 2016, China launched the research and development of high-speed maglev transportation system with a speed of 600 km / h. After four years of scientific and technological research, China has successfully broken through the key core technologies of high-speed maglev series. This is the world’s first high-speed maglev transportation system with a speed of up to 600 km / h, and also the fastest ground rail transit available at present. The successful launch of the 600 km / h high-speed maglev transportation system also marks that China has mastered the complete set of high-speed maglev technology and rail power distribution solutions. It is a major innovation breakthrough in the field of high-speed maglev in China, and also makes another major contribution to globalization.In terms of speed, at present, the highest operating speed of high-speed rail in the world is 350 km / h, and the cruising speed of aircraft is about 800-900 km / h. The 600 km high-speed maglev just fills the gap between high-speed rail and air transportation. In fact, high speed maglev is even faster than an airplane on a journey within 1500 kilometers. For example, it takes about 4.5 hours by plane, 5.5 hours by high-speed rail and about 3.5 hours by high-speed maglev. In addition to long-distance transportation, medium and short-distance passenger transport is also applicable, especially in two adjacent cities. With high-speed maglev, the efficiency of commuting is bound to be improved.In terms of safety, the high-speed maglev uses “holding rail”, and there is no risk of derailment. The high-speed maglev power supply and distribution system uses sectional power supply and distribution. Only one train can run in the same power supply and distribution section, and there is almost no risk of rear end collision. The power supply system of maglev rail transit can be divided into three parts: main substation, traction power supply system and power supply system. The main substation reduces the 110kV power supply of the power system to 20kV medium voltage power supply through the main distribution transformer to supply power to the traction power supply system and power supply system. The traction power supply system will reduce the voltage of 20kV medium voltage to DC, and then convert it into three-phase AC with adjustable voltage, frequency, current and phase angle through inverter, and feed it to the stator winding along the line for traction or braking of the train; The power supply system will send the 20kV power supply of the main substation to the trackside substation along the line through 20K medium voltage ring network cable. The trackside substation will supply power to the station and the power load along the line after the 20kV Voltage is reduced or rectified.Internationally, high-speed maglev is a cutting-edge technology, and many developed countries are studying it. China has focused on overcoming the technical problems of safety protection, precise control, comfort improvement and operation and maintenance guarantee under the speed of 600km / h, and developed a new generation of lightweight and high-strength car body. Developed international leading performance indicators of suspension guidance, speed measurement and positioning device and control system.>In terms of traction system, we independently developed the world’s first 24 MVA high-power transformer traction converter system based on ANPC technology, as well as high-speed multi zone traction control system.>In the aspect of operation control communication, we have established a fully automatic control system suitable for long and large trunk lines and tracking operation, and innovated and developed a new communication system based on LTE architecture and low delay technology.>In terms of track, the core technical indicators are proposed to solve the problems of processing, installation and river crossing.