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Emergency management capacity assessment for urban rail transit-an example of Beijing Metro Line 13

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Transportation Safety and Environment 2024年第1期6卷 109-115页

作者： Jiao Liu Yun Qi Wei Wang School of Emergency Management and Safety Engineering China University of Mining&Technology(Beijing)Beijing 100083China China Safety Science Journal Editorial Department China Occupational Safety and Health AssociationBeijing 100011China College of mechanical engineering and automation Liaoning University of TechnologyJinzhou 121001LiaoningChina

In order to improve the emergency management capability of urban rail transit system and reduce accidents during metro operation,an emergency management capability evaluation method combining analytic hierarchy process(AHP)and technique for order preference by similarity to ideal solution(TOPSIS)is *** on the Prevention Preparation Response Recovery(PPRR)model,factors influencing the emergency management capability of the urban rail transit system are summarized from the perspective of‘human,machine,environment and management’.Then,an emergency management capability evaluation index system containing of 20 secondary indicators is constructed in four stages:emergency prevention,emergency preparation,emergency response and emergency *** weights of indicators are calculated using the AHP method,and the closeness of each indicator to the optimal solution is analysed with the TOPSIS ***,take the Beijing Metro Line 13 as an example to investigate the level of emergency management capability of urban rail *** results show that the emergency management capability of Beijing’s urban rail transit system is‘well’,among which hazard prevention measures(0.31)and emergency response team(0.34)have a greater weight on the emergency management capability of rail *** model can more accurately assess the emergency management capability of urban rail transit and provide a basis for emergency management.

关键词： urban rail transit emergency management capability analytic hierarchy process(AHP) technique for order preference by similarity to ideal solution(TOPSIS) prevention preparation response recovery(PPRR)model

Understanding the Resilience of urban rail transit:Concepts,Reviews,and Trends

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Engineering 2024年第10期41卷 7-18页

作者： Yun Wei Xin Yang Xiao Xiao Zhiao Ma Tianlei Zhu Fei Dou Jianjun Wu Anthony Chen Ziyou Gao Beijing Mass transit railway Operation Corporation Ltd. Beijing 100044China School of Systems Science Beijing Jiaotong UniversityBeijing 100044China Traffic Control Technology Corporation Ltd. Beijing 100160China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China

As the scale of urban rail transit(URT)networks expands,the study of URT resilience is essential for safe and efficient *** paper presents a comprehensive review of URT resilience and highlights potential trends and directions for future ***,URT resilience is defined by three primary abilities:absorption,resistance,and recovery,and four properties:robustness,vulnerability,rapidity,and ***,the metrics and assessment approaches for URT resilience were *** metrics are divided into three categories:topology-based,characteristic-based,and performance-based,and the assessment methods are divided into four categories:topological,simulation,optimization,and *** of various metrics and assessment approaches revealed that the current research trend in URT resilience is increasingly favoring the integration of traditional methods,such as conventional complex network analysis and operations optimization theory,with new techniques like big data and intelligent computing technology,to accurately assess URT ***,five potential trends and directions for future research were identified:analyzing resilience based on multisource data,optimizing train diagram in multiple scenarios,accurate response to passenger demand through new technologies,coupling and optimizing passenger and traffic flows,and optimal line design.

关键词： urban rail transit Resilience assessment Resilience improvement Network disruption

Physics Guided Deep Learning-Based Model for Short-Term Origin–Destination Demand Prediction in urban rail transit Systems Under Pandemic

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Engineering 2024年第10期41卷 276-296页

作者： Shuxin Zhang Jinlei Zhang Lixing Yang Feng Chen Shukai Li Ziyou Gao School of Systems Science Beijing Jiaotong UniversityBeijing 100044China School of Civil Engineering Beijing Jiaotong UniversityBeijing 100044China

Accurate origin–destination(OD)demand prediction is crucial for the efficient operation and management of urban rail transit(URT)systems,particularly during a ***,this task faces several limitations,including real-time availability,sparsity,and high-dimensionality issues,and the impact of the ***,this study proposes a unified framework called the physics-guided adaptive graph spatial–temporal attention network(PAG-STAN)for metro OD demand prediction under pandemic ***,PAG-STAN introduces a real-time OD estimation module to estimate real-time complete OD demand ***,a novel dynamic OD demand matrix compression module is proposed to generate dense real-time OD demand ***,PAG-STAN leverages various heterogeneous data to learn the evolutionary trend of future OD ridership during the ***,a masked physics-guided loss function(MPG-loss function)incorporates the physical quantity information between the OD demand and inbound flow into the loss function to enhance model ***-STAN demonstrated favorable performance on two real-world metro OD demand datasets under the pandemic and conventional scenarios,highlighting its robustness and sensitivity for metro OD demand prediction.A series of ablation studies were conducted to verify the indispensability of each module in PAG-STAN.

关键词： Short-term origin-destination demand prediction urban rail transit Pandemic Physics-guided deep learning

Design and verification of an improved experimental platform for stray current in urban rail transit

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Journal of Measurement Science and Instrumentation 2024年第3期15卷 379-386页

作者： LI Yaning KANG Hong WANG Ye LI Wenfei JIAO Meng ZHANG Wencai School of Automation and Electrical Engineering Lanzhou Jiaotong UniversityLanzhou 730070China School of Environmental and Municipal Engineering Lanzhou Jiaotong UniversityLanzhou 730070China

With the rapid development of urban rail transit,there have been an urgent problem of excessive stray *** the stray current distribution is random and difficult to verify in the field,we designed an improved stray current experimental platform by replacing the simulated aqueous solution with a real soil environment and by calculating the transition resistance by measuring the soil resistivity,which makes up for the defects in the previous ***,the mathematical models of rail-drainage net and rail-drainage netground were established,and the analytical expressions of current and voltage of rail,drainage net and other structures were *** addition,the simulation model was built,and the mathematical analysis results were compared with the simulation ***,the accuracy of the improved stray current experimental platform was verified by comparing the measured and simulation ***,based on the experimental results,the influence factors of stray current were *** relevant conclusions provide experimental data and theoretical reference for the study of stray current in urban rail transit.

关键词： urban rail transit stray current experimental platform transition resistance soil resistivity

Evaluation of Voltage Quality and Energy Saving Benefits of urban rail transit Power Supply Systems Considering the Access of Photovoltaics

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CSEE Journal of Power and Energy Systems 2023年第6期9卷 2309-2320页

作者： Ding Feng Hengkai Zhu Feng Wang Xiaojun Sun Sheng Lin Zhengyou He the School of Electrical Engineering Southwest Jiaotong UniversityChengdu 611756China. China railway Design Group Co. Ltd.Tianjin 300000China

Along the route of urban rail transit(URT),the subway depots,parking lots,and elevated subway stations are equipped with sufficient photovoltaic(PV)generation *** access of PVs in the URT power supply system should not only make full use of nearby renewable energy,but also improve the economic operation of the *** order to quantify the impact of PV access on the URT power supply system,this paper proposes a method to evaluate the voltage quality and energy saving benefits of the URT power supply system,considering PV ***,by fully considering the random fluctuations of PV output power,as well as the intermittency and impact of traction load,the URT power supply system with PV access is ***,such values as system voltage and power are calculated through the hybrid AC/DC load flow calculation *** with the results of the load flow calculation,the indicators describing voltage quality and power saving benefits of the system are proposed to quantify the influence of PV access on the ***,a case study concerning a certain section of a subway line is presented to verify the proposed *** shows that the proposed method can effectively quantify the voltage quality and power saving benefits of the system after PV access,providing valuable insights for design and maintenance personnel to comprehend system state and operating characteristics.

关键词： Energy saving benefits photovoltaics urban rail transit voltage quality

Future 5G-Oriented System for urban rail transit:Opportunities and Challenges

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China Communications 2021年第2期18卷 1-12页

作者： Junhui Zhao Jin Liu Lihua Yang Bo Ai Shanjin Ni School of Information Engineering East China Jiaotong UniversityNanchang 330013China School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China State Key Laboratory of rail Traffic Control and Safety Beijing Jiaotong UniversityBeijing 100044China

As a development direction of urban rail transit system,the train autonomous circumambulate system(TACS)can operate in a safer,more efficient,and more economical ***,most urban rail transit systems transmit signals through industrial,scientific,and medical(ISM)frequency bands or narrow frequency bands,which cannot meet the requirements of *** a promising solution,the 5th generation(5G)mobile communication provides more services for the future urban rail transit systems,and covers the shortages of exiting communication technologies in terms of capacity and *** this paper,we first briefly review the research status of current train control system and introduce its ***,we propose a novel network architecture,and present new technologies and requirements of the proposed architecture for *** potential challenges are then discussed to give insights for further research of TACS.

关键词： urban rail transit train autonomous circumambulate system(TACS) prospective review the 5th-generation(5G) train to train(T2T)communication reinforcement learning(RL)

A hierarchical coordinated control strategy based on multi-port energy router of urban rail transit

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Protection and Control of Modern Power Systems 2022年第1期7卷 201-212页

作者： Richeng Chen Yaxi Yang Tao Jin College of Electrical Engineering and Automation Fuzhou UniversityFuzhou 350116China Fujian Key Laboratory of New Energy Generation and Power Conversion Fuzhou 350116China

The multi-port energy router(ER)is an effective topology for integrating train traction load,AC load,the energy storage system and photovoltaic(PV)*** start and stop process of urban rail transit trains and the access of distributed energy sources to rail transit ER lead to serious fluctuations of DC bus power,so it is necessary to route energy between different ports,involving multi-operating modes,while seamless switching is a major *** this paper,a hierarchical coordinated control strategy is proposed to enable the multi-port ER to operate in a coor-dinated fashion under the conditions of train parking,acceleration,constant power driving and deceleration,and to switch seamlessly under various working *** energy central dispatching layer sends working condi-tion instructions by sampling the state information of each port,while the microgrid control layer adopts central-ized control,receiving upper working condition instructions and sending drive signals to the local control layers to maintain the balanced energy flow of each *** the local control layers,the PV adopts the improved perturbation and observation method of power control(PC-P&O),while the ES system adopts voltage loop control with an SOC influence factor,voltage loop control with switching factor and power loop control according to the different working conditions,so as to transmit the required train load power accurately and maintain the stability of the DC bus ***,the effectiveness of the proposed hierarchical coordination control is verified by MATLAB/Simulink simulations.

关键词： Energy router(ER) urban rail transit Hierarchical coordinated control Seamless switching

Coupling real-time simulation of power supply,trains and dispatching for urban rail transit

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Transportation Safety and Environment 2021年第3期3卷 267-279页

作者： Yu Zhang Zhaoyang Zhang Li’en Xu Ting Ying Jianghong Li Huaguo Chen Yunqing Hu Guangming Qing CRRC Zhuzhou Institute Co. Ltd.Zhuzhou 412001P.R.China

In order to study the interaction among the traction power supply,the train group and the operation dispatching of urban rail transit,a coupling simulation system of power supply system,trains and dispatching management is *** order to solve the problems of different timescales and difficult cooperation operation for related subsystems,a multi-bus distributed real-time network architecture based on hierarchical management of communication data is established,and simulation management software is developed to facilitate the free expansion of the simulation ***,the track line,train operation and other large timescale subsystems are realized by the pure digital *** the time-sensitive subsystems,such as train traction system,braking system,auxiliary power supply system and network system etc.,are built by the semi-physical *** this article,the system structure and the main implementation principle of each simulation subsystem are given in detail,and the system is tested and verified at the *** results show that the simulation system can meet the expected requirements.

关键词： coupling simulation power supply train dispatch real-time simulation urban rail transit

Research on Multi-Objective Real-Time Optimization of Automatic Train Operation(ATO) in urban rail transit

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Journal of Shanghai Jiaotong university(Science) 2018年第2期23卷 327-335页

作者： HE Tong XIONG Ruiqi School of Traffic and Transportation Lanzhou Jiaotong University Lanzhou 730070 China

The determination and optimization of Automatic Train Operation(ATO) control strategy is one of the most critical technologies for urban rail train operation. The practical ATO optimal control strategy must consider many goals of the train operation, such as safety, accuracy, comfort, energy saving and so on. This paper designs a set of efficient and universal multi-objective control strategy. Firstly, based on the analysis of urban rail transit and its operating environment, the multi-objective optimization model considering all the indexes of train operation is established by using multi-objective optimization theory. Secondly, Non-dominated Sorting Genetic Algorithm II(NSGA-II) is used to solve the model, and the optimal speed curve of train running is ***, the intelligent controller is designed by the combination of fuzzy controller algorithm and the predictive control algorithm, which can control and optimize the train operation in real time. Then the robustness of the control system can ensure and the requirements for multi-objective in train operation can be satisfied.

关键词： urban rail transit multi-objective Automatic Train Operation(ATO) Non-dominated Sorting Genetic Algorithm II(NSGA-II) fuzzy predictive controller