Introduction
The department mainly works in the secondary disciplines of Power Electronics & Electric Drive and Detection Technology and Automation. Currently it has 18 teachers, including 5 professors, 8 PhD supervisors and 12 associate professors. The school recruits master's students in the first-level discipline of Electrical Engineering, and PhD students in the second-level discipline of Power Electronics and Electric Drive, Detection Technology and Automation and Transport Apparatus Operation engineering.
It has undertaken many R&D projects under the National 863 Program, the National Sci-Tech Support Plan, the National Natural Science Foundation of China, ministries, commissions, Beijing Municipal and enterprises. It has carried out researches on rail transit traction transmission equipment, train communication network, condition monitoring and failure diagnosis and train safety monitoring system, having developed and accumulated a batch of scientific research achievements. The indicators of national projects and invention patents undertaken by the department are in the front rank of the domestic field of Electrical Engineering.
Research Direction
- Electrification and intellectualization of Transport Apparatus: centering on transport apparatus such as maglev train, automobile and aircraft
- Acquisition of vehicle-network status, online simulation, health management and intelligent failure diagnosis of urban rail transit
- Status acquisition, service feature, performance optimization and technical promotion of data-driven electric traction drive system
- Design, control optimization and intelligent technology of power electronics system
Representative Results
(1). Key technology of multi-functional composite energy-feedback traction power supply
To solve the regenerative braking energy reusing problems of the subway system, the energy-feedback power-supply system of urban rail transit has been developed, realizing multi-function like energy-saving running of trains, power factor compensation and overhead lines de-icing/anti-icing. Many of the core key technologies have met the international advanced level.
This system has been applied to 18 urban rail lines in Beijing, Shenzhen and other cities. Among them, Beijing Metro Line 14 has installed 17 sets of multi-functional composite energy-feedback traction power-supply devices. After put into use, it saves more than 28900 kilowatt hours of electricity per day, and 8,438,800 yuan per year for the whole line. This achievement won the second prize of Beijing Technological Invention Award in 2019.
（2）The system design, management control, reliability evaluation and other key technologies of power source system based on new materials and new energy
Coping with the demands of transport fields like rail transit and military transportation, a 140kW rail transit converters prototype based on full SIC MOSFETs has been developed under the key project of the development of rail transit converters using SIC MOSFETs approved by Beijing Science and Technology Commission. The volume and weight of the filters have been reduced by 2/3 and the integration degree has been increased by 40%. Under the Ministry of Industry and Information Technology project of industrial technology basic service platform for rail transit core components, researches have been made on online failure diagnosis, reliability evaluation and life management technology of power switching devices, and a general technology platform and an integrated detection platform have been established; under the JW major logistics project on key technology and application research of rapid-deployment energy system, the rapid-deployment energy system has been developed, based on oil engine, energy storage and power electronic current transforming technology and through the integrated energy management and control of "grid - source - conversion - load".
（3）New electrical equipment and control technology for transport apparatus
The research directions of the department include system dynamics analysis, design and control of transport apparatus; rail transit and new urban transportation technology and equipment; system design & optimization, transmission and control of EMU and urban rail vehicles, braking and running safety technology of EMU and urban rail trains, technical and economic analysis of urban rail transit equipment, modernization of operation management of urban rail transit, etc.
The results of research include levitation and driving control technology of maglev train, suppression technology of electromagnetic noise of medium speed maglev train, carbon-fiber car body grounding and electromagnetic compatibility technology; Inductive power transfer technology of urban rail transit; Digital design, simulation and evaluation platform technology of auxiliary power supply system of high-speed train; multi-power simulation modeling technology of modern highway trolley train, vehicle power-operation stability-control technology, train tracking control and self-guiding technology.
（4）Real-time scheduling and health management system of Train Communication Network (TCN)
Under the key research projects of China National Railway Group Co., LTD and related projects of CRRC, the key technological challenges of high-speed train real-time communication and scheduling strategy optimization have been overcome. We have developed the WTB/MVB protocol control soft core of the train control network, UIC gateway, MVB repeater, MVB protocol analyzer, logic control unit (LCU) and other key network core equipment with independent intellectual property rights, which have accelerated the independent process of key core equipment of network control system of Fuxing EMU in China.
For the research and application of real-time Ethernet of the next generation train, we focus on the design and development of the train real-time Ethernet TRDP protocol in different embedded platforms. Now, the application and development based on different platforms, such as PowerPC, ARM, SCM, and different real-time operating systems, such as Linux and Vxworks, have already been realized.
Due to the increase of train ownership and resulted maintenance cost in recent years, it is of great significance to carry out health management and failure prediction for train communication network. Centering on train communication network PHM and based on the WTB + MVB framework and train real-time Ethernet network, the research group has set up a health management platform for the gathering of network status, extraction of characteristic information and application of AI technology like machine learning, so as to realize the health management and failure prediction of the train control network and PIS integrated train time-sensitive network.
（5）Key technologies of intelligent gathering and remote monitoring system of service status of rail transit infrastructure
Supported by China National Railway Group Co., Ltd. and Shenyang Railway Bureau, the data acquisition equipment and system of frost damage prevention of the Jilin-Tumen-Huichun railway tunnel has been set, the distributed acquisition and transmission device for measuring the temperature of tunnel rock mass developed, and the remote online acquisition of tunnel temperature data along the Jilin-Tumen-Huichun railway realized. Supported by Harbin Railway Bureau, the remote online monitoring system for ground power consumption status of air conditioning bus repair and maintenance was developed, allowing the ground power consumption information to be transmitted to the server through the acquisition and transmission device and viewed all over the country. We also developed a remote on-line monitoring device and system for water consumption and drainage, which won the Railway Science and Technology Award of China Railway Society. Under the National Natural Science Foundation of China and 863 program, a sensor with networking function was developed, which can form a network of sensors to realize distributed multi-sensor joint gathering, and obtain more accurate information through fusion algorithm.
（6）Detection system of obstacles and derailment of urban rail
The fully automatic unmanned subway train has no driver. If there is an obstacle on the line, or when the train derails, serious consequences might come, or even more serious, if without taking brake measures in the first place and the train keeps on working. Obstacles and derailment detection devices can effectively provide safety protection. This research achievement is applied to Beijing new airport line to ensure the safe operation of the city rail trains of the line. Meanwhile, it has also been employed to Beijing Yanfang Line, Beijing Metro Line 17, Chengdu Metro Line 9, Shanghai Metro Line 15, Hong Kong Metro suburban line, and subway trains exported to Turkey. At present, 478 sets of cars have been loaded, with an output value of 106 million yuan.
(7) Research on Advanced Driver Assistance based on Intelligent Fusion Perception
The visual perception system based on deep neural network records the status of participants moving around the car body in real time. Deep learning model and time tracking model are used to realize the digitalization of the perception and three-dimensional restoration of the surrounding environment of the vehicle. With the advanced sensor information fusion technology, the following three advanced driver assistance functions are realized: adaptive cruise control, emergency braking and automatic lane keeping.
