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An Analysis of Magnetic Field Environment Near High-Voltage Power Lines and Contact Wires of Electric Railways 被引量:2
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作者 LILi GAOYou-gang 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 2000年第1期78-81,共4页
Image method is used in this paper to calculate the value of magnetic field near high-voltage transmission lines and electric railways. Areas in which the magnetic field is less than 0.002 Gauss are given and the magn... Image method is used in this paper to calculate the value of magnetic field near high-voltage transmission lines and electric railways. Areas in which the magnetic field is less than 0.002 Gauss are given and the magnetic pollution of high-voltage power transmission lines and electric railways is discussed 展开更多
关键词 High-voltage power transmission line electric railway electromagnetic calculation magnetic field
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Influence of RE on Ageing Precipitate Characteristics and Softening Resistance of Copper Alloys Contact Wire 被引量:2
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作者 Liu Yong Liu Ping +1 位作者 Tian Baohong Li Wei 《Journal of Rare Earths》 SCIE EI CAS CSCD 2005年第4期I0009-I0009,共1页
The effect of RE (such as Ce, Y and mixed Ce + Y, etc) on ageing precipitate, characteristics and softening resistance of Cu-Cr-Zr alloys contact wire used in electrical railway were investigated in this paper. The... The effect of RE (such as Ce, Y and mixed Ce + Y, etc) on ageing precipitate, characteristics and softening resistance of Cu-Cr-Zr alloys contact wire used in electrical railway were investigated in this paper. The results show that the tested Cu-Cr-Zr alloy with trace RE addition could attain higher microhardness and lower electrical conductivity to some extent after being soluted at 950 ℃ for 1 h and aged at 480 ℃. The precipitation process of secondary phase could be accelerated by cold working before ageing treatment which resulted in ageing hardening. Aged at 480 ℃ after 60% cold working, the values of electrical conductivity and microhardness improved significantly compared with that without deformation. The mixed RE (Ce + Y) improved the softening resistance substantially in these trace RE additions, which could increase the soften temperature by 45 ℃. 展开更多
关键词 electrical railway Cu-Cr-Zr contact wire MICROHARDNESS electrical conductivity softening temperature rare earths
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Integrated Railway Smart Grid Architecture Based on Energy Routers
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作者 Peng Yao Hao Wang +3 位作者 Yijun Liu Jinping Niu Zhiwei Zhu Lin Lin 《Chinese Journal of Electrical Engineering》 CSCD 2021年第4期93-106,共14页
Railway power system is an inseparable part of the power system,therefore,the intelligent architecture of the railway power system should also be focused on.The unique power supply characteristics of the railway power... Railway power system is an inseparable part of the power system,therefore,the intelligent architecture of the railway power system should also be focused on.The unique power supply characteristics of the railway power system are analyzed and integrated railway smart grid architecture based on energy routers is proposed.Importantly,three corresponding resilient mode control methods are suggested for the proposed architecture.In the fourth section,a simulation model corresponding to the resilient control mode is built and the simulation results prove the feasibility of the proposed control mode.Equally,for the novel network-connected backbone router(NCBR),a 1000 kVA,27.5/10 kV NCBR engineering prototype is used to prove its effectiveness in practical applications.Finally,a differentiation analysis is given,followed by conclusions regarding the traditional power system and proposed system. 展开更多
关键词 railway traction power system railway electric distribution system integrated railway smart grid architecture energy migration router network-connected backbone router engineering prototype
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Dynamic Phasor Modeling and Low-frequency Oscillation Analysis of Single-phase Vehicle-grid System
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作者 Xiaoqin Lyu Xiaoru Wang +1 位作者 Yulong Che Longyuan Li 《CSEE Journal of Power and Energy Systems》 SCIE EI CSCD 2023年第1期158-171,共14页
In practical operations,low-frequency oscillation(LFO)occurs and leads to converter blocking when multiple electrical rail vehicles at the platform are powered by the traction network.This paper proposes a small-signa... In practical operations,low-frequency oscillation(LFO)occurs and leads to converter blocking when multiple electrical rail vehicles at the platform are powered by the traction network.This paper proposes a small-signal model in state-space form for multiple vehicle-grid systems based on a dynamic phasor.This model uses the phasor amplitude and phase as variables to accurately describe the dynamics of the converter phase-domain control.An eigenvalue based-method is introduced to investigate the LFO with advantages of acquiring all oscillatory modes and analyzing participation factors.Two low-frequency dominant modes are identified by eigenvalues.Mode shape reveals that one of the modes involves the oscillations between the grid-connected converters and the traction network,and the other one involves the oscillations among these converters.Then the sensitivities of these two low-frequency modes to different system parameters are analyzed.Participation factors of system state variables,when the number of connected vehicle increases,are compared.Finally,the theoretical analysis is verified by nonlinear time-domain simulations and the modal analysis based on the estimation of signal parameters via the rotational invariance techniques(ESPRIT)method. 展开更多
关键词 Dynamic phasor eigenvalue analysis electrical railway grid-connected converter low-frequency oscillation participation factors
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