Short-term track change, energy-saving and environmentally friendly high-speed EMU is expected to open a transnational journey
Our reporter Yang Lun
On the morning of October 21, the 400km/h cross-border interconnection high-speed EMU rolled off the assembly line at CRRC Changchun Rail Bus Co., Ltd.
The train is designed to operate at a speed of 400 kilometers per hour and can run between international railways with different weather conditions, different gauges, and different power supply standards.
The EMU is a key special item of the national key research and development plan "Advanced Rail Transit", which has the characteristics of energy saving, environmental protection, active safety, and intelligent maintenance. At the same time, the train has strong environmental adaptability and can operate at a temperature of ±50℃ , The realization of interconnection on the railway network covering 90% of the world is a major innovation achievement of my country's high-speed railway equipment in the new era.
In 2016, the Ministry of Science and Technology of the People's Republic of China took the lead in launching the “Key Technologies for High-speed Passenger Transport Equipment at Speeds of 400 km/h and above” in the “13th Five-Year” national key research and development plan “Advanced Rail Transit”, which is a landmark project of my country's rail transit technology innovation.
With the meticulous organization of the High-tech Department and the High-Tech Center of the Ministry of Science and Technology, and the strong support of China National Railway Group Co., Ltd., the project was organized by CRRC. CRRC Changke took the lead in uniting more than 30 key production, academic, and research units. Breakthroughs have been achieved in key core technology areas such as system integration of high-speed EMUs, variable structure running, traction conversion, and multi-objective optimization control of train operation.
Take the example of variable structure walking behavior.
Previously, the biggest obstacle to cross-border interconnection was the difference in global gauge standards.
There are four main types of gauges: standard gauge 1,435 mm, Russian wide gauge 1,520 mm, European wide gauge 1,676 mm, and meter gauge 1067 mm.
"The previous method of rail change was to lift the car body and replace the bogie of the train, which generally took 2-3 hours, and it would take longer if debugging was included." said Wang Lei, senior design expert of CRRC .
At the off-line ceremony, the train was demonstrated on-site. It only took a few minutes to complete the track change operation during the train’s journey. “Because our car body and bogie are not separated, and the traction system and network system are not separate. Disconnect, so there is no need to debug, saving a lot of time."
In terms of comprehensive energy-saving technology research on the multi-objective balance of "weight-resistance-power", the project has also achieved results. Under the same operating speed, the average energy consumption per kilometer per kilometer of trains is reduced by 10%, and the noise is reduced by 2 decibels.
In addition, the project also builds a multi-objective balanced energy-saving optimization simulation platform for high-speed trains to formulate technical plans and evaluate energy consumption in terms of aerodynamic resistance, traction power, mass distribution, etc., while increasing the speed without increasing energy consumption, which can be called energy saving and environmental protection. Green train.
Safety is the highest priority for high-speed EMUs.
Due to the application of intelligent composite sensor technology, big data technology and feature extraction technology, the train can realize intelligent evaluation, status diagnosis and early warning and alarm in operation status.
At the same time, through the vehicle-mounted equipment, vehicle-ground data transmission, and ground system, a vehicle-ground integrated life-cycle management platform has been constructed to provide decision-making suggestions for train operation and maintenance, and realize active safety assurance and intelligent maintenance.
According to the person in charge of the project, based on the technology and product platform formed by this project, Chinese equipment manufacturing enterprises can customize the production of interconnected high-speed train products in accordance with the technical standards and operational service requirements of various regions around the world, which can fully meet the future technology of China's high-speed railways. The development needs of construction and operation can also provide strong technical support for the implementation of high-end equipment "going out" and the "transportation power" strategy, and also establish a new leading technology and standard system for global rail transit high-speed passenger transportation equipment.