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检索条件"机构=State Key Laboratory of Traction and Control System of EMU and Locomotive"

共 25 条记录，以下是11-20 订阅

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Research on Integrating Track-Side PV Power Plant into the Railway traction Power Supply Network 11th

Research on Integrating Track-Side PV Power Plant into the R...

引用

11th Frontier Academic Forum of Electrical Engineering, FAFEE 2024

作者： Xu, Wenhao Tian, Ao’bo An, Xingkun Jin, Zheming School of Electrical Engineering Beijing Jiaotong University Beijing100044 China Key Laboratory of Vehicular Multi-Energy Drive Systems Ministry of Education Beijing Jiaotong University Beijing100044 China Beijing Zongheng Electro-Mechanical Technology Co. Ltd Beijing100094 China State Key Laboratory for Traction and Control System of EMU and Locomotive China Academy of Railway Sciences Corporation Limited Beijing100081 China

ISBN: (纸本)9789819787791

As a major part of the passenger and goods transportation in China, the railway has been greatly deployed and developed. Currently, with a high level of electrification, integrating distributed photovoltaic (PV) and other renewables will be the main potential method to further reduce the energy consumption of the Chinese railway system and to achieve the transition to carbon neutral transportation system. In this paper, the methodology to integrate the track-side PV power plant is discussed. Based on the unique 27.5kV/50Hz single phase power transmission facility of Chinese railway system, a back-to-back dual-feeder interface of the track-side PV power plant is designed and examined with the traction loads of the railway system. The circuit topology and the control are discussed, and the system performance is demonstrated with simulation. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Electric power plant loads

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A Fault Modeling Method for the Asynchronous Motor Based on the Stator Current

A Fault Modeling Method for the Asynchronous Motor Based on ...

引用

IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Wei Jiang Kun Zhang Biao Liu Yijie Zhou Bin Gou Wei Xiong State Key Laboratory for Traction and Control System of EMU and Locomotive China Academy of Railway Sciences Corporation Limited Beijing China School of Electrical Engineering Southwest Jiaotong University Chengdu China

As the heart of the train traction system, the traction asynchronous motor is deeply related to the safety and reliability of trains. However, due to the long-term operation in the harsh environment, the motor is prone to malfunction and lead to system performance degradation. Therefore, this paper proposes a fault modeling method for the traction asynchronous motor based on stator current, where the stator inter-turn short circuit fault and broken rotor bar fault are taken into consideration. Firstly, the fault mechanism of the motor stator inter-turn short circuit fault and rotor broken bar fault are analyzed, and the fault characteristic of the stator current signals are obtained. Then the mathematical models of stator and rotor faults are constructed according to the equivalent physical models of stator inter-turn short circuit fault and rotor broken bar fault. Finally, the fault models are simulated to validate the effectiveness and applicability of the proposed method.

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Research on Boot Problem and Automatic Repair of an Embedded Real-Time Operating system

Research on Boot Problem and Automatic Repair of an Embedded...

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Computer Technologies (ICCTech), International Conference on

作者： Haoshang Zhou Zhaoling Gao Zhongfu Wang Xiaopeng Wang State Key Laboratory for Traction and Control System of EMU and Locomotive CRRC Dalian Electric Traction R&D Center Co. Ltd. School of Intelligence and Electronic Engineering Dalian Neusoft University of Information

At present, in the communication between Electric Multiple Units (emu) and locomotive network control system, in order to ensure the stability of vehicle control and the accuracy and reliability of data recording, its key components - Central control Unit (CCU) and Event Record Machine (ERM) adopt an embedded real-time operation system. In order to facilitate debugging, the system needs to start Microsoft's DOS system before being called to start. Based on the feedback of the embedded real-time operating system startup failure from each locomotive and rolling stock depot, this paper will elaborate on its startup process and propose a solution that can automatically repair the startup problem, which has been tested in the laboratory to prove that this method can effectively avoid the system startup failure.

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Design of DC-Excited Linear Synchronous Motors for High-Speed Maglev Transport

Design of DC-Excited Linear Synchronous Motors for High-Spee...

引用

Australasian Universities Power Engineering Conference, AUPEC

作者： Tengfei Qiu Jun Di Huang Chen Huiying Chen John Fletcher State Key Laboratory for Traction and Control System of EMU and Locomotive China Academy of Railway Sciences Corporation Limited Beijing China School of Electrical Engineering Beijing Jiaotong University Beijing China School of Electrical Engineering and Telecommunications University of New South Wales Sydney Australia

ISBN: (数字)9798350377941

ISBN: (纸本)9798350377958

The high-speed maglev train driven by the DC-excited linear synchronous motor (DCELSM) has been a promising type of transport due to its advantages such as no limitation on wheel-rail interaction, high-speed large-thrust target, and relatively lower cost compared to superconductive linear machines. This paper proposes a design strategy of the DCELSM for high-speed maglev applications. The target speed aims at $600 \mathrm{~km} / \mathrm{h}$ and the design strategy takes fully consideration on the large-scale linear machines. With the proposed design method, a feasible solution of the DCELSM is revealed, including its main geometry dimensions, circuit parameters, and steady-state characteristics. Besides, the decoupling analysis is carried out based on steady-state power-angle characteristics of thrust and levitation force. The design and analysis in this paper provide a general method for the DCELSMs in large-scale applications and two practical guidelines for the high-speed maglev transport.

关键词： Geometry Power engineering Magnetic levitation vehicles Design methodology Force Superconductivity Levitation Synchronous motors Steady-state Guidelines

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Reduction on Longitudinal End Effect of High-Speed-Maglev DC-Excited Linear Synchronous Motors

Reduction on Longitudinal End Effect of High-Speed-Maglev DC...

引用

Australasian Universities Power Engineering Conference, AUPEC

ISBN: (数字)9798350377941

ISBN: (纸本)9798350377958

The DC-excited linear synchronous motor (DCELSM) is one of the major types of electrical machine used in high-speed maglev trains. But the longitudinal end effect is a flaw that may cause side effects such as over-saturation due to the structure of linear machines. To suppress the longitudinal end effect, subsided end field-poles are usually adopted in real-world industrial applications. This paper proposes a theoretical model that takes the longitudinal end effect into account. Via the field analysis, the theoretical method to design the subsided end field-poles are established, as well as the estimation on thrust and levitation force by virtue of the subsidence distance of the end field-poles. Using the proposed theory, the end-field poles subsided by 28 mm are determined for a DCELSM utilised in a real-world maglev application. Besides, practical conclusions are obtained by further investigation into the air-gap field and electromagnetic forces in terms of the subsidence distance. The model and the analysis in this paper provide a general method to compensate for the longitudinal end effect in the DCELSMs.

关键词： Power engineering Magnetic levitation vehicles Atmospheric modeling Force Air gaps Prototypes Estimation Levitation Synchronous motors Optimization

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Research on Intelligent Diagnosis Algorithm for Electrical Faults of Induction Motor Stator and Rotor Based on Coordinate Transformation and Support Vector Machine

Research on Intelligent Diagnosis Algorithm for Electrical F...

引用

IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Wei Jiang Biao Liu Yijie Zhou Bin Gou State Key Laboratory for Traction and Control System of EMU and Locomotive China Academy of Railway Sciences Corporation Limited Beijing China Tangshan Institute of Southwest Jiaotong University Southwest Jiaotong University Chengdu China School of Electrical Engineering Southwest Jiaotong University Chengdu China

As the key power source of train traction system, the safety and reliability of traction asynchronous motor operation is crucial. To improve the efficiency of vehicle maintenance, online monitoring of the working state of traction asynchronous motors has received increasing attention. This paper proposes a diagnosis algorithm based on the combination of coordinate transformation and support vector machine for traction asynchronous motors. Firstly, coordinate transformation can convert power frequency components into direct flow, facilitating the extraction of fault features. Then, from the perspective of data driven, this paper collects historical fault data under varying operating conditions and loads, and designs an intelligent fault diagnosis framework. Finally, a fault recognition classifier is trained based on support vector machines to identify stator inter turn short circuit and rotor bar breakage faults of traction asynchronous motors, and to guide accurate vehicle maintenance.

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Effect of Micro-nano Particles Co Doping in Epoxy on Surface Flashover 22

Effect of Micro-nano Particles Co Doping in Epoxy on Surface...

引用

22nd International Symposium on High Voltage Engineering, ISH 2021

作者： Gao, Xiang Zhang, Bo Huang, Jin Niu, Huan Li, Mingru Li, Shengtao The Locomotive and Car Research Institute China Academy of Railway Sciences Beijing100081 China State Key Laboratory of EMU and Locomotive Traction and Control China Academy of Railway Sciences Beijing100081 China State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Shanxi Xi'an710049 China

ISBN: (纸本)9781839536052

Surface flashover, which is mostly occurring at the gas-solid interface of insulators, is the weakest of the insulation system both in electric power system and rail vehicle electrical equipment due to it being lower than both solid and gas breakdown voltage. Although it has been proved that adding micro and nano particles to the material can improve the flashover voltage effectively, there still exists some terra incognita. In this paper, we change the order of doping particles to prepare different micro-nano co doped epoxy based samples. The results of dielectric permittivity and DC surface flashover hold that adding microparticles first means better performance. The nanoparticles will fill the void in the epoxy. As a result, it could reduce the free volume in the compound and increase the migration barrier of polar molecules comparing with adding nano particles first. The increasing barrier decreases the permittivity which is crucial to the surface flashover voltage by controlling the electric field intensity of the cathode triple junction. The reduction of dielectric permittivity reduces the distortion of electric field at the triple junction. As a result, the initial stage of surface flashover is limited because the electron emission from cathode being restrain. Therefore, the surface flashover voltage increases when the nano particles added after micro particles. © 2021 The Institution of Engineering and Technology.

关键词： Epoxy resins

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A Fault Diagnosis Method for Stator Inter-Turn Short Circuit Fault of Induction Motor Based on Multiple Signal Decomposition and Reconstruction

A Fault Diagnosis Method for Stator Inter-Turn Short Circuit...

引用

Asia Conference on Energy and Environment Engineering (ACEEE)

作者： Wei Jiang Yijie Zhou Biao Liu Wei Xiong Xin Zhang Bin Gou State Key Laboratory for Traction and Control System of EMU and Locomotive China Academy of Railway Sciences Corporation Limited Beijing China Tangshan Institute of Southwest Jiaotong University Southwest Jiaotong University Chengdu China School of Electrical Engineering Southwest Jiaotong University Chengdu China

The characteristics of the stator inter-turn short circuit fault of induction motor under light load conditions are inconspicuous, which may cause difficulty in fault diagnosis. To address this, a fault diagnosis method based on multiple signal decomposition and reconstruction is proposed in this paper. In the proposed method, the DC link current signal is selected to obtain obvious the characteristics of the stator inter-turn short circuit fault. In the event of the stator inter-turn short circuit fault, the fault characteristic frequency of the DC side current is derived. Then, the fault characteristic frequency extraction is realized based on multiple signal decomposition and reconstruction, such as Hilbert transform, the empirical mode decomposition (EMD), the signal reconstruction, the variational mode decomposition (VMD). With this, the fault diagnosis for the stator inter-turn short circuit fault of induction motor is achieved. The effectiveness of the proposed scheme is verified by simulations and hardware-in-the-loop testing.

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Research on Leakage Inductance and Eddy Current Loss of Nanocrystalline High-Frequency Transformers

Research on Leakage Inductance and Eddy Current Loss of Nano...

引用

International Conference on Electrical Machines and systems (ICEMS)

作者： Yang Liu Xue Liu Zhenhuan Yin Kan Dong Chi Ma Dongdong Cui State Key Laboratory for Traction and Control System of EMU and Locomotive China Academy of Railway Science Corporation Limited Beijing China Key Laboratory of Power Electronics and Electric Drive Institute of Electrical Engineering Chinese Academy of Sciences School of Electronic Electrical and Communication Engineering University of Chinese Academy of Sciences Beijing China

High-frequency transformers are a vital component of isolated DC/DC converters, and its leakage inductance can be adjusted by changing the winding method of the two-phase windings. Nanocrystalline magnetic cores have been widely applied due to their advantages in high-saturation flux and high magnetic permeability. However, their quite high electrical conductivity can easily lead to appreciable eddy current loss. This paper investigates the mechanism behind the eddy current loss caused by leakage flux by varying the number of windings cross turns, and verifies through simulation that the eddy current loss of nanocrystalline high-frequency transformers increases with increasing leakage inductance.

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Performance Analyses of a High-Frequency Transformers With Different Magnetic Cores

Performance Analyses of a High-Frequency Transformers With D...

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IEEE Conference and Expo Transportation Electrification Asia-Pacific (ITEC Asia-Pacific)

作者： Yanlei Li Yingtao Ma Jiepin Zhang Feiao Wu Dong Li State Key Laboratory for Traction and Control System of EMU and Locomotive China Academy of Railway Sciences Corporation Limited Beijing China Locomotive&Car Research Institute China Academy of Railway Sciences Corp. Ltd. Beijing China Beijing Zongheng Electromechanical Technology Co. Ltd. Beijing China School of Electrical Engineering Beijing Jiaotong University Beijing China

ISBN: (数字)9798331529277

ISBN: (纸本)9798331529307

Taking advantages of the high power density and high efficiency, High Frequency Transformers (HFT) have been widely applied in the electrified transportation. However, the low saturation flux density and large core loss has limited the increase of the power. In the paper, the core loss calculation method of HFT operated under high frequency non-sinusoidal excitation are presented. Then the flux density and efficiency of HFT with double E-type and C-type core structures are compared. The finite element method was taken to analyze the performances of HFT with different core materials and different operation current waveforms. The relations of the efficiency with the power, core clearance, and operation frequency are also studied. Then the experimental results are carried out on the prototype of 60 kW HFT to verify the accuracy of the calculation results.

关键词： Analytical models Core loss Transportation Prototypes Transformer cores High-frequency transformers Magnetic analysis High frequency Magnetic losses Wire

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