Proceedings of the 5th International Conference on Electrical Engineering and Information Technologies for Rail Transportation (EITRT) 2021: Novel ... Notes in Electrical Engineering, 864)

Contents
Overview of Multilevel Inverter Topologies and Modulation Methods
	1 Introduction
	2 Multilevel Inverter Topologies
		2.1 Neutral-Point-Clamped (NPC)
		2.2 Flying Capacitor
		2.3 Cascaded H-Bridge (CHB)
	3 New Multilevel Inverter Topologies
		3.1 Five-Level H-bridge Neutral-Point-Clamped (5L-HNPC)
		3.2 Active Neutral-Point-Clamped (ANPC)
		3.3 Transistor-Clamped H-Bridge (TCHB)
	4 Modulation Methods of Multilevel Inverter
		4.1 Space Vector Pulse Width Modulation (SVPWM)
		4.2 Level-Shifted Pulse Width Modulation (LS-PWM)
		4.3 Phase-Shifted PWM (PS-PWM)
		4.4 Optimized Modulation Methods
	5 Development Trend of Multilevel Inverter
	6 Summary
	References
Rotor Broken Bar Fault Diagnosis for Induction Traction Motor Considering Low Load Condition
	1 Introduction
	2 Rotor Broken Bar Fault Diagnosis Under Low Load Condition
		2.1 Rotor Broken Bar Fault Diagnosis Method Based on the Low Frequency Voltage Injection
		2.2 Implementation of the Low Frequency Injection Algorithm
	3 Experiments Results
	4 Conclusion
	References
Research on EDS Propulsion Characteristics of Superconducting High Speed Maglev Train
	1 Introduction
	2 Study on Spatial Magnetic Field Density Distribution
	3 Modeling and Characteristic Study of LSM
		3.1 Establishment and Verification of LSM Model
		3.2 Analysis of Induced Voltage Characteristics of LSM
	4 Analysis on Traction Control Characteristics of LSM
	5 Conclusion
	References
Research on Capacity Configuration of Hybrid Energy Storage System for High-Speed Railway
	1 Introduction
		1.1 High-Speed Railway Hybrid Energy Storage System Topology
		1.2 High-Speed Railway Electricity Bill Metering Method
	2 High-Speed Railway Capacity Configuration Model
		2.1 Capacity Configuration Decision Variables
		2.2 Capacity Configuration Objective Function
		2.3 Capacity Configuration Constraint Function
	3 Case Study
	4 Conclusion
	References
Control Strategy of Flywheel Energy Storage Arrays in Urban Rail Transit
	1 Introduction
	2 Flywheel Energy Storage Systems Model
	3 Control Strategy of FESA
		3.1 Current Closed-Loop Based on MTPA and Lead Angle Flux-Weakening
		3.2 Voltage Closed-Loop Based on Multiple Thresholds
		3.3 Speed Closed-Loop Based on Speed Balance
		3.4 Simulation Analysis
	4 Experimental Verification
		4.1 Experiment Platform
		4.2 Experimental Results and Analysis
	5 Conclusion
	References
Electrothermal Simulation of IGBT Module Based on Simulink
	1 Introduction
	2 The Structure and Operating Principle of the Mutual-Feeding Towing System
	3 System Vector Control Strategy
	4 Foster Thermal Network Model
	5 Simulation Results and Analysis
	6 Simulation Results and Analysis
	References
NP Voltage Control Strategy Based on 6th Harmonic Injection for Three-Level Converter
	1 Introduction
	2 Effect of the Sixth Harmonic on the NP Voltage
	3 NP Voltage Control Method
	4 Simulation Results
	5 Conclusions
	References
Design and Implementation of ARM-FPGA-Based Control Platform for a Maglev PMLSM Drive Prototype
	1 Introduction
	2 Maglev PMLSM Drive Prototype
	3 ARM-FPGA-Based Control Platform Design
		3.1 Design Overview
		3.2 EtherCAT Network Design
		3.3 ARM-FPGA Joint Architecture Design
	4 Platform Verification of Communication and Control
		4.1 EtherCAT Communication Verification
		4.2 Maglev PMLSM Drive Prototype Control Verification
	5 Conclusion and Future Work
	References
Calculation and Simulation of Temperature Rise of Traction Transformer for EMU
	1 Introduction
	2 Establishment and Control of Traction System Model
	3 Calculation of Temperature Rise of Traction Transformer
		3.1 Current Situation of Traction Transformer Temperature Rise Calculation
	4 Calculation of Temperature Rise of Traction Transformer
	5 Simulation Results and Verification
	6 Conclusion
	References
Time Varying Characteristic Analysis of Asynchronous Motor Parameters
	1 Introduction
	2 Theoretical Analysis of Time Varying Characteristics of Motor Parameters
		2.1 Analysis of Temperature Effect of Stator Resistance
		2.2 Inductance Analysis Considering Magnetic Circuit Saturation
		2.3 Skin Effect Analysis of Motor Rotor
	3 Experimental Analysis of Time Varying Characteristics of Motor Parameters
		3.1 No Load Test and Parameter Calculation of Induction Motor
		3.2 Short-Circuit Test and Parameter Calculation of Asynchronous Motor
		3.3 Asynchronous Motor Stator DC Resistance Measurement
	4 Analysis of Parameter Characteristics Based on ANSYS Motor Model
	5 Conclusion
	References
The Complex Optimal Trajectory Planning for Following High-Speed Trains Based on Fixed Block Signaling System
	1 Introduction
	2 A Classical Optimal Train Control Model
	3 Optimal Train Control Problems of Following Trains
	4 Case Studies
	5 Conclusion
	References
Study of Singularity Characteristics of Contact Force Signal of High-Speed Railway
	1 Introduction
	2 The Coupled Model of Pantograph and Catenary
		2.1 Establishment of the Coupled Model of Pantograph-Catenary
	3 Analysis of Singularity Characteristics of Contact Force Signal
		3.1 Analysis of Singularity of the Contact Force Signal Based on LE
		3.2 Analysis of the Influence of Catenary Parameters on LE of Contact Force
	4 Conclusions
	References
Multi-mode Control of Variable-Speed Generator Set in Multi-energy Drive System
	1 Introduction
	2 Characteristics of Generator Set
	3 Control Strategy
	4 Experimental Results
	5 Conclusion
	References
Research on Accelerated Aging Test and Junction Temperature Detection Method of IGBT
	1 Introduction
	2 Design of Aging Test Platform
		2.1 AC Accelerated Aging Platform
		2.2 DC Accelerated Aging Platform
	3 IGBT Power Loss Modeling
	4 Electrothermal Coupling Model Method
	5 Finite Element Analysis Method
	6 Conclusions
	References
Dual-Mode DC/DC Converter for Multi-energy Drive System
	1 Introduction
	2 Topology of Bi-directional DC/DC Converter
	3 Realization of Bi-directional DC/DC Converter Control
	4 Simulation of Bidirectional DC/DC Converter
	5 Prospect and Conclusion
	References
Research on Photovoltaic Grid Connected Inverter Without Isolation Transformer
	1 Introduction
	2 Leakage Current Analysis of Photovoltaic Grid Connected Inverter Without Isolation Transformer
	3 Analysis of a New Two Stage NPC Type Photovoltaic Grid Connected Inverter Without Isolation Transformer
		3.1 Theoretical Analysis of DC/DC Part
		3.2 Theoretical Analysis of DC/AC Part
	4 Research on Control Strategy of a Novel Two Stage Photovoltaic Grid Connected Inverter Without Isolation Transformer
	5 Construction of Experimental Prototype and Experimental Results
	6 Conclusions
	References
Dynamic Thermal Model of Traction Induction Motor Based on Thermal Network Method
	1 Inroduction
	2 Theoretical Basis of Thermal Networks
		2.1 Heat Source Calculation of Thermal Network Model
		2.2 Dynamic Calculation
		2.3 Simulation Result
	3 Experimental Verification
	4 Conclusion
	References
Intelligent Operation and Maintenance Platform for Power Supply System of Urban Rail Transit
	1 Overall Architecture of System Platform
		1.1 Overall Architecture of Integrated Monitoring System
		1.2 Overall Architecture of Intelligent Operation and Maintenance Platform for Power Supply System
	2 Design of Intelligent Operation and Maintenance Platform for Power Supply System
		2.1 Platform Hardware Architecture
		2.2 Platform Software Architecture
		2.3 Platform Data Aggregation
	3 Functional Realization of Intelligent Operation and Maintenance Platform for Power Supply System
		3.1 Basic Function Realization
		3.2 Implementation of Basic Data Aggregation
		3.3 Functional Realization of Workbench Management
		3.4 Function Realization of Equipment Management
		3.5 Function Realization of Technical Data Management
	4 Concluding Remarks
	References
An Estimation Method for Replacement Cost of Multi-energy Drive System
	1 Introduction
	2 Topological Structure of Multi-energy Drive System
	3 Replacement Cost of Multi-energy Drive System
		3.1 Principle of V-shaped Closed-Loop Counting Method
	4 Replacement Cost of Multi-energy Drive System
	5 Conclusion
	References
Temperature Rise Analysis of Traction Motor Based on Vector Control
	1 Introduction
	2 Vector Control Strategies
	3 Modeling and Simulation of Motor Temperature Rise
		3.1 Theoretical Basis of Thermal Network Model
		3.2 The Establishment of Thermal Network Model
		3.3 Simulation of Thermal Network Model
	4 Conclusion
	References
Research on Second Harmonic Suppression of Hybrid EMU
	1 Introduction
	2 Active Power Decoupling Scheme
		2.1 Research on Topological Modification of Hybrid EMU
		2.2 Working Principle of Second Harmonic Suppression
		2.3 Method to Obtain the Command Value of Decoupled Capacitance Voltage
		2.4 Working Principle of Second Harmonic Suppression
	3 Simulation Results and Analysis
		3.1 Uncontrolled
		3.2 Active Power Decoupling Mode
	4 Experimental Results and Analysis
	5 Conclusion
	References
Electric Braking Energy Absorption Schemes for Emergency Self-Running EMU Under Long Ramp
	1 Introduction
	2 Train Energy and Power Demand Analysis
	3 Hybrid Absorption System of Battery and Brake Resistor
		3.1 Battery Configuration
		3.2 Brake Resistance Calculation
	4 Control Strategy and Simulation Verification
		4.1 Battery Control
		4.2 Brake Resistor Control
		4.3 Control and Simulation Verification of Hybrid Absorption System
	5 Conclusion
	References
Stator Flux Orientation Based Model Predictive Current Control of Induction Motor
	1 Introduction
	2 MPCC Model Based on Stator Flux Orientation
		2.1 Induction Motor Model
		2.2 Stator Flux Orientation
	3 MPCC System for Induction Motor
		3.1 MPCC Operating Principle
		3.2 MPCC System Topology
	4 Simulation Results and Analysis
	5 Conclusion
	References
Research on IGBT Condition Monitoring Based on On-State Voltage Drop
	1 Introduction
	2 Design of On-State Voltage Drop Measurement Circuit for IGBT
		2.1 Voltage Measurement Part
		2.2 Voltage Isolation Part
	3 Simulation Verification
		3.1 Simulation Model
		3.2 Simulation Result
	4 Experimental Verification
	5 Conclusion
	References
Hybrid PWM Strategy Based on FPGA
	1 Introduction
	2 Fundamental Principles and Methods of SHEPWM
	3 Calculation of Switch Angle of SHEPWM
	4 FPGA Implementation of SHEPWM
	5 Simulation and Experiment
	6 Conclusion
	References
Status and Development of Core Control Chips for Rail Transit Vehicles
	1 Introduction
	2 Introduction to Rail Transit Train Control System
	3 Current Status of the Core Control Chip Market for Rail Transit Trains
		3.1 Computing and Control Chips
		3.2 Data and Program Memory
		3.3 Communication Chip
		3.4 Other Analog Chips
	4 Development Trend of Core Control Chips for Railway
		4.1 Increased Reliability
		4.2 The Characteristic Size of the Device is Reduced
		4.3 Convergence of New Technologies
	5 Market Prospect of Global Rail Transit Train Control Chip
		5.1 Conforming to Economic Globalization
		5.2 Seek a New Technological Breakthrough
		5.3 Break Through Self-Development Capabilities
	References
Harmonic Suppression of Three-Phase Four-Wire Inverter
	1 Introduction
	2 Conventional Resonant Controller
	3 Simulation
	4 Conclusion
	References
Optimization of Self-Learning Speed-Tracking Control for Permanent Magnet Synchronous Motor
	1 Introduction
	2 PMSM Model
	3 Design of ADHDP Speed Regulator
		3.1 Dynamic Programming
		3.2 Design of Speed Loop Controller Based on ADHDP
		3.3 Implementation of ADHDP Speed Controller Algorithm
	4 Simulation Test
	5 Conclusion
	References
Analysis on the Influencing Factors of Harmonic Interaction Among High-Speed Railway EMUs
	1 Introduction
	2 Principle of Harmonic Transmission Between Two Locomotives
	3 Harmonic Impedance Interaction Model of Traction Power Supply System
		3.1 Impedance Equivalent Model of Traction Power Supply System
		3.2 Calculation of Harmonic Interactive Impedance of Two Locomotive
		3.3 Harmonic Interaction Impedance Matrix of Two Locomotives
	4 Simulation Verification
		4.1 The Influence of Locomotive Spacing on Harmonic Resonance
		4.2 Theoretical Comparison
		4.3 Different Types of Filters Suppress the Interaction of Harmonics
	5 Simulation Verification
	References
Analysis of Urban Rail Resistance Braking System and IGBT Loss Evaluation
	1 Introduction
	2 Braking System for Urban Rail Vehicles
	3 Analysis of Key Components of Resistance Braking
		3.1 Insulated Gate Bipolar Transistor IGBT
		3.2 Braking Resistors
		3.3 Control Unit
	4 Practical Case Studies
		4.1 Analysis of Braking Conditions
		4.2 Device Loss Evaluation
	5 Conclusion
	References
Research on Speed Tracking Control of Medium Speed Maglev Train Based on Linear Active Disturbance Rejection Controller
	1 Introduction
	2 Dynamic Model of MSM
		2.1 Basic Resistance
		2.2 Line Resistance
	3 Design of LADRC
		3.1 Design of LESO
		3.2 Design of LSEF
		3.3 Summary of LADRC
	4 Design of the MSM-STS
		4.1 Simulation Analysis
		4.2 Summary and Expectation
	References
Status and Trend of High Power IGBT Gate Drive Technology
	1 Introduction
	2 Development Status of IGBT Gate Drivers
		2.1 Power Integration (Concept)
		2.2 Inpower
		2.3 Infineon
		2.4 Amantys
		2.5 Bronze Technology
		2.6 Firstack Technology
	3 Main Working Principle of Active Gate Drive
		3.1 Main Assembly
		3.2 Principle of DC/DC Circuit
		3.3 Principle of Driving Circuit
		3.4 Short Circuit Protection Principle Based on VCEDetection
	4 Key Technology of Gate Drive and Its Development Trends
		4.1 High Precision IGBT Parameter Online Extraction Technology
		4.2 Fault Identification and Protection Diagnosis Technology
		4.3 IGBT Status Assessment and Life Prediction Techniques
	5 Conclusion
	References
An Optimal Operation Scheme Considering Multiple Factors for Automatic High-Speed Train
	1 Introduction
	2 Optimization Model of Automatic Train Driving
		2.1 Dynamic Model of Train Operation
		2.2 Energy-Saving Operation Model of Train
	3 Genetic Algorithm Scheme
		3.1 Basic Rules of Operation
		3.2 Algorithm Overview
		3.3 Algorithm Flowchart
	4 Example Simulation
		4.1 Simulation Subject
		4.2 Simulation Results
	5 Conclusion
	References
Research on Control Strategy of High Performance Auxiliary Inverter
	1 Introduction
	2 Modeling of the System
	3 Control Strategy
		3.1 Harmonic Suppression
		3.2 Unbalance Suppression
		3.3 Control Strategy
	4 Simulation Results
		4.1 Unbalanced Load
		4.2 Nonlinear Load
	5 Conclusion
	References
Heat Sink Design for High Power LED Lamp Based on Differential Evolution Algorithm and Heat Pipes
	1 Introduction
	2 Heat Sink Design Using Differential Evolution Algorithm
		2.1 Heat Sink Model and Structure
		2.2 Implementation Steps of Differential Evolution Algorithm
	3 Experimental Results
	4 Conclusions
	References
Online Hybrid Feedback Control Strategy via Switching Position Optimization for Energy-Saving Operation of Urban Trains
	1 Introduction
	2 Problem Description
		2.1 Optimal Control Problem of Train Energy-Saving Operation
		2.2 Description of the Optimal Control Problem Based on Position Discretization
	3 Online Hybrid Control Based on Discrete Dynamic Programming Method
		3.1 State Space Discretization
		3.2 Discrete State Space Reduction
		3.3 Terminal Backward Dynamic Programming
		3.4 Online Backward Dynamic Programming for Remaining Distance
	4 Simulation Example
	5 Conclusion
	References
Optimization Strategy for High-Speed Rail Regenerative Braking Energy Utilization Considering Cascade Feedback of Traction Substations Mode
	1 Introduction
	2 Analysis of Load Characteristics and RBE Characteristics
		2.1 Load Characteristics in the Different Operation States
		2.2 Analysis of RBE Characteristics
	3 Utilization Modes of RBE
		3.1 ES Mode
		3.2 CF of Traction Substations Combining with ES Mode
	4 Research Model
		4.1 Objective Function
		4.2 Constraints
		4.3 Work Flow
	5 Case Study and Discussion
		5.1 Parameter Setting
		5.2 Results of ES Mode
		5.3 Results of CF of Traction Substations Combining with ES Mode
		5.4 Discussion About the Utilization Rate and the Total Cost
	6 Conclusion
	References
Sequence Optimization of Target Speed Curve and Energy Management Strategy forFuel Cell Hybrid Tram
	1 Introduction
	2 Structure and Model of Fuel Cell Hybrid Tram
		2.1 Structure of FC Hybrid System for Tram
		2.2 Model of Energy Source
	3 Target Speed Curve and Energy Management Strategy
		3.1 Target Speed Curve of the Tram
		3.2 Energy Management Strategy of the Tram
	4 Sequence Optimization of TSC and EMS
		4.1 Relationship Between TSC and EMS
		4.2 Sequence Optimization Problem
		4.3 Sequence Optimization Method
		4.4 Optimization Parameters and Constraints
	5 Simulation and Results
	6 Conclusion
	References
A Method for Optimizing the Turn-on Angle of a 6/20 Motor Based on DITC
	1 Introduction
	2 A New 6/20 Structure Motor
		2.1 Basic Structure
		2.2 Working Principle
	3 Traditional DITC Strategies
	4 A Turn-on Angle Self-adjusting Optimization Method According to Speed
	5 Simulation Experiment Analysis
	6 Conclusion
	References
An Energy Management Strategy for Multi-energy Drive Systems Based on Dynamic Programming
	1 Introduction
	2 Basic Principle of Dynamic Programming Algorithm
	3 Optimal Control Based on Dynamic Programming
	4 Optimization Results of Dynamic Programming Algorithm
	5 Conclusion
	References
Design of Switched Reluctance Motor Power Converter for Electric Vehicle
	1 Introduction
	2 Design of Integrated Power Converter
		2.1 The Topology of Integrated Power Converter
		2.2 Analysis of Driving Mode
	3 Design of Integrated Power Converter Parameters
		3.1 Mathematical Model of Switched Reluctance Motor
		3.2 Calculation of Capacitor Parameters
		3.3 Limiting Conditions of Winding Reuse
	4 System Simulation and Analysis
		4.1 Composition of Simulation System
		4.2 Analysis of Simulation Results in Driving Mode
		4.3 Analysis of Simulation Results in Charging Mode
	5 Conclusion
	References
Hysteresis Optimization and Power Converter Research of Direct Instantaneous Torque Control for SRM
	1 Introduction
	2 Traditional DITC Strategy
		2.1 Direct Instantaneous Torque Control Method
		2.2 DITC Hysteresis Control
	3 Optimal Power Converter
		3.1 Proposed Power Converter
		3.2 Operation Modes of the Proposed Power Converter
	4 Optimal Strategy of Hysteresis Control
		4.1 Regions Division and Analysis
		4.2 Optimal of Hysteresis
	5 Simulation Analysis
	6 Conclusion
	References
Optimization Analysis of Vehicle Dynamic Performance Based on RSM and RBF Approximation Model
	1 Introduction
	2 Establishment of Dynamic Simulation Model
	3 Dynamic Performance Optimization
		3.1 Experimental Design
		3.2 Error Analysis
		3.3 Optimization Calculation
	4 Conclusion
	References
Research on RPC-SC System for Negative Sequence Current Compensation of Electrified Railway
	1 Introduction
	2 PRC-SC Topology and Negative Sequence Compensation
		2.1 Topology of PRC-SC
		2.2 Negative Sequence Current Compensation
	3 Specific Control Strategy of PRC-SC
		3.1 RPC Control
		3.2 Bidirectional DC/DC Control
	4 Test Verification and Analysis
	5 Conclusion
	References
Application on EMC of IGBT Modules in Traction Converter
	1 Introduction
	2 EMI of Power Device
		2.1 EMI of Power Diode
		2.2 EMI of IGBT
		2.3 Spectrums of PWM Pulse
	3 EMI of Traction Converter
		3.1 EMI Source
		3.2 Common-Mode and Differential-Mode Interference
		3.3 Coupling Paths of Common-Mode Interference
	4 EMC of Double-Pulse Test
		4.1 Double-Pulse Test
		4.2 Grounding of IGBT Module
		4.3 Analyzing of EMI in Double-Pulse Test
	5 Summary
	References
Wireless Power Supply System for Maglev Trains Using Capacitive Interface with Multiple Transmitters
	1 Introduction
	2 Overview of CPT System with Multiple Transmitters
	3 Analysis of Capacitive Interface
		3.1 Structure of Capacitive Interface
		3.2 Mathematical Model and Equivalent Circuit
	4 Analysis and Design of System
		4.1 Analysis of Compensation Network
		4.2 System Design
	5 Experimental Verification
		5.1 Experimental Prototype
		5.2 Experimental Results
	6 Conclusion
	References
Design and Implementation of MTPA and Flux Weakening Control for IPMSM
	1 Introduction
	2 Mathematical Model of PMSM
		2.1 Motor Model in d-q Coordinate System
		2.2 PMSM Operating Conditions Constraints
	3 MTPA and Flux Weakening Control Principle of PMSM
		3.1 Principle of MTPA Control
		3.2 Principle of Flux Weakening Control
	4 Control Method Implementation and Test Verification
		4.1 PMSM Control System
		4.2 Closed-Loop Control Framework of PMSM
		4.3 Experimental Verification
	5 Conclusion
	References
Auxiliary Power Supply for New Boston Orange and Red Line Trains
	1 Introduction
	2 Overview of the Auxiliary Power Supply System
	3 APS Main Circuit and Controls
		3.1 DC/DC Converter of API
		3.2 Three-Phase CVCF Inverter
		3.3 DC/DC Converter of LVPS
	4 Degraded Mode
		4.1 API Failure
		4.2 LVPS Failure
		4.3 Dead Battery
	5 Diagnostics
	6 Conclusions
	References
Hybrid Pulse Width Modulation for Metro Permanent Magnet Traction Motors
	1 Introduction
	2 Permanent Magnet Traction Hybrid Pulse Width Modulation Technology
	3 SHEPMM Modulation
	4 Smooth Switching of Hybrid Pulse Width Modulation
		4.1 Switching Principle Between Asynchronous Modulation and Synchronous Modulation
		4.2 Switching Principle Between Synchronous Modulation
		4.3 Switching Between Synchronous Modulation and SHEPWM Modulation
		4.4 Switching Between SHEPWM Modulation
	5 Conclusion
	References
Youla Parameterization Strategy for Guidance System in High-Speed Maglev Train with H2 Controllers
	1 Introduction
	2 Materials and Methods
		2.1 Modeling of High-Speed Maglev Train Guidance System
		2.2 Design Method of H2 Controller and Youla Parameterization Principle of Controller
		2.3 Analysis and Design of Guidance Controller
	3 Method Verifiction
		3.1 Simulation of Guidance System with H2Controller
		3.2 Simulation of Guidance System with Youla Parameterized H2Controller
	4 Conclusion
	References
Photovoltaic DC Microgrid with Hybrid Energy Storage System Connected to Electrified Railway Traction Power Supply System
	1 Introduction
	2 Topology and Control Method
		2.1 Topology and Control Method of PV DC Microgrid with HESS
		2.2 Topology and Improved Control Method of RPC
	3 Control Strategy of PV DC Microgrid System with HESS
		3.1 HESS Energy Distribution Strategy Based on SOC Value
		3.2 Control Strategy of HESS with Dynamic Adjustment of Limiting Power
	4 Analysis of Simulation Results
		4.1 Simulation Parameter Setting
		4.2 Simulation Results
	5 Conclusion
	References
Design and Simulation Verification of Full-Bridge LLC Resonant Converter
	1 Introduction
	2 Full-Bridge LLC Resonant Converter
	3 Parameters Design of Full-Bridge LLC Resonant Converter
		3.1 Design of Lm
		3.2 Design of Lrand Cr
		3.3 Design Constraints of the Transformer Turns Ratio N
	4 Simulation Results and Analysis
	5 Conclusion
	References
Research on Safety Testing Technology of the Intelligent Traction Power Supply System of Beijing-Zhangjiakou High-Speed Railway
	1 New Features of Relay Protection in Intelligent Traction Power Supply System
		1.1 Requirements for Relay Protection Configuration of Traditional Traction Substation
		1.2 New Features of Hierarchical Protection for Intelligent Traction Substation
	2 Hierarchical Protection of the Measurement and Control System of the Wide-Area Protection
		2.1 System Architecture
		2.2 The Network Communication Requirements
	3 Level Protection Test of Intelligent Traction Power Supply System
		3.1 Summary
		3.2 T-R Short-Circuit Fault
	4 Conclusions
	References
Using Untransposed Overhead Lines to Reduce Negative Sequence Current Injected by Railway Substation
	1 Introduction
	2 Analysis of Transmission Lines and Railway Load
	3 Power Flow Calculation
	4 Conclusion
	References
Framework and Key Technologies of Intelligent Operation and Maintenance of Traction Transformer Based on Knowledge Graph
	1 Introduction
	2 The Overview of Knowledge Graph-Based IO&M for Traction Transformer
		2.1 Overview of Knowledge Graph
		2.2 IO&M of Traction Transformer
	3 Critical Technologies
		3.1 Data Acquisition
		3.2 Knowledge Graph Construction
		3.3 Condition Assessment
		3.4 Intelligent Services
		3.5 KG-Based Fault Treatment Process
	4 Conclusion
	References
Analysis of Influence of Sea Breeze on Regularity State of Contact Wire
	1 Introduction
	2 Impact Index Method
	3 Influence of Different Wind and Vehicle Speeds on the Impact Index
	4 Difference in Contact Wire Regularity in the Wind Zone and the Non-wind Zone
	5 Conclusions
	References
Modeling, Analysis of Digital Control Multiphase Paralleled DC Converter
	1 Introduction
	2 Converter and Control Scheme
	3 Modeling Method
		3.1 Power Electronic Plant
		3.2 Current Control Loop
		3.3 Voltage Control Loop
	4 Simulation Validation and Stability Analysis
	5 Conclusion
	References
Analysis of the Dynamic Performance Between Pantograph and Rigid Conductor Rail Considering Construction Error of the Contact Wire Height
	1 Introduction
	2 Probability Distribution of the Contact Wire Height in Real
	3 Dynamic Simulation Model of Pantograph and Rigid Conductor Rail
	4 Dynamic Performance Analysis of Pantograph and Conductor Rail with Different Construction Error of Contact Wire Height
	5 Conclusions
	References
Analysis on the 2 × 25-KV 50 Hz Traction Power Supply System: Short-Circuit Modeling
	1 Introduction
	2 2 × 25 kV-50 Hz High-Speed Railway System Description
		2.1 The Substation Model Description
		2.2 The Auto-transformer Model Description
		2.3 Traction Network
	3 Short-Circuit Modeling of the 2 × 25 kV AT-Fed Railway
		3.1 Analysis and Results of the Short-Circuit Modeling
		3.2 Analysis on the Short-Circuit Impedance
	4 Conclusion
	References
Research on the Crosswind Effect on Uplift of Contact Line of Cross-Sea Bridge
	1 Introduction
	2 Analysis on Crosswind Effect on Uplift of Contact Line
		2.1 Wind-Induced Vibration of Contact Line
		2.2 Wind-Induced Uplift of Positioner
	3 Analysis of Detection Data
		3.1 Comparison of Uplift of Uplink Lines
		3.2 Comparison of Uplift of Downlink Lines
	4 Correlation Test of Wind Velocity and Uplift
	5 Conclusions and Suggestions
	References
Research on Bi-directional Buck/Boost Soft Switching PWM-PFM Control Strategy
	1 Introduction
	2 Control Methods
		2.1 Control Principle
		2.2 Variable Frequency Control Strategy
		2.3 Frequency Calculation
	3 Simulation Verification
	4 Conclusion
	References
Research on the CDI-Based Operation and Maintenance Solution
	1 Introduction
	2 CDI Application Status
	3 Analysis of Poor Interaction Between Pantograph and Catenary
	4 CDI-Based Operation and Maintenance Solution
		4.1 Optimization of the Pantograph and Catenary Relation During the Operation Period
		4.2 Trend Prediction of Catenary Dynamic Performance Deterioration
	5 Conclusions
	References
A Series-Connected 12-Pulse Rectifier Based on the Isolated Transformer with Symmetrical Windings
	1 Introduction
	2 Topology and Working Principle of the 12-Pulse Rectifier
		2.1 Topology of the Proposed 12-Pulse Rectifier
		2.2 Analysis of the Working Principle
		2.3 Calculation of the Theoretical Input Winding Voltage Distortion Rate
	3 Capacity Analysis of the Isolated Transformer
	4 Simulation Verification
	5 Conclusion
	References
Detection Approach Based on an Improved Yolov5 for Catenary Support Components
	1 Introduction
	2 Related Work
		2.1 CSCs Detection Based on Image Processing
		2.2 Attention Mechanism
	3 Method
		3.1 Yolov5
		3.2 CA-Yolov5
	4 Experiment
		4.1 Dataset
		4.2 Metric
		4.3 Experimental Results
	5 Conclusion
	References
Power Quality Analysis of Weak Power Grid Under the Connection of Bilateral Power Supply Traction Load
	1 Introduction
	2 Principle of Bilateral Power Supply for Electrified Railway
	3 Co-simulation Model of Bilateral Power Supply Traction Load and Weak Power Grid
	4 Equilibrium Current Analysis
	5 Power Quality Analysis of Weak Power Grid
		5.1 Analysis of Three Phase Voltage Unbalance
		5.2 Analysis of Current Harmonic
		5.3 Analysis of Voltage Deviation
	6 Conclusion
	References
Simulation Strategy of Capacitor Voltage Fluctuation for Railway Power Conditioner Based on MMC-RPC Topology
	1 Introduction
	2 MMC-RPC Topology
		2.1 Topology
		2.2 MMC-RPC Submodule Topology
	3 MMC-RPC Modulation Method
	4 Simulative Verification of MMC-RPC Simulated Capacitor Voltage Fluctuat
	5 Conclusion
	References
Influence of Wind Power Generation System Accessing to Traction Power Supply System on Power Quality
	1 Introduction
	2 The Principle of Wind Power Generation
	3 The Access Scheme of Wind Power Generation System
	4 Simulation
		4.1 Voltage Deviation
		4.2 Power Factor
		4.3 Three-Phase Current Unbalance Factor
		4.4 Harmonic Voltage Distortion
	5 Conclusion
	References
Regenerative Braking Energy Utilization and Harmonic Control Based on Supercapacitor Energy Storage
	1 Introduction
	2 Analysis of System Structure and Compensation Principle
		2.1 RPC-SCESS System Topology
		2.2 Principle of RPC-ESS Compensation
	3 Characteristic Harmonic Suppression Method
	4 RPC-SCESS Energy Management and Control Strategies
		4.1 RPC-SCESS Energy Management Strategy
		4.2 RPC-ESS Control Strategy
	5 Simulation Analysis and Verification
	6 Conclusions
	References
Low-Frequency Oscillation Research of Sichuan-Tibet Railway Under Bilateral Power Supply for Mixed Passenger and Freight Locomotives Operation
	1 Introduction
	2 Background
	3 Modeling of Locomotive-Network System in Sichuan-Tibet Railway
		3.1 Network-Side Model
		3.2 HXD2 and CRH380AL Locomotive Model
	4 Stability Analysis Under Different SCR
	5 Simulation Verification
		5.1 Influence of Single Locomotive on System Stability
		5.2 Influence of Multiple Locomotives on System Stability
	6 Conclusion
	References
Parameter Optimization of Pantograph Structure Based on Multi-objective Genetic Algorithm
	1 Introduction
	2 Establishing the Model of Pantograph Structure Parameters
	3 Pantograph Constraints and Objective Function Setting
		3.1 Constraints on the Structural Parameters of the Pantograph
		3.2 Objective Function Determination
	4 Implementation of Multi-objective Genetic Optimization Algorithm for Pantograph Structural Parameters
		4.1 Multi-objective Optimization Model Description
		4.2 The Implementation Process of Genetic Optimization Algorithm
	5 Analysis of Optimization Results of Pantograph Structure
		5.1 Analysis of Iterative Results of Genetic Optimization Algorithm
		5.2 Analysis of Bowhead Motion Trajectory and Torque Optimization Results
		5.3 Analysis of Optimization Results of Pantograph Balance Ba
	6 Conclusion
	References
Swin Transformer-Based Positioning Methodology for Catenary Support Components in High-Speed Railway
	1 Introduction
	2 Related Research
		2.1 CSCs Detection with Traditional Methods
		2.2 CSCs Detection with Deep Learning
	3 Method and Architecture
		3.1 An Overview of the Method
		3.2 Feature Extraction with Transformer
		3.3 Fusion of Multi-layer Features Using Feature Pyramid Networks (FPN)
		3.4 Cascade R-CNN Detector
	4 Experiment Result
		4.1 Dataset
		4.2 Evaluation Index
		4.3 Experiment Result
	5 Conclusion
	References
Transformer Fault Diagnosis Algorithm for Traction Power Supply System Based on IoT
	1 Introduction
	2 Principle Analysis
		2.1 IoT Information Collection Process
		2.2 PSO-BP Algorithm Principle
		2.3 Transformer Fault Diagnosis System Based on PSO-BP
	3 Test Case and Simulation
		3.1 Analysis of PSO-BP Diagnosis Results
		3.2 BP Algorithm Diagnosis Result Analysis
		3.3 Analysis of Optimal Results of Fault Feature Value Based on Particle Swarm Optimization
	4 Conclusion
	References
Simulation Analysis of Electric Erosion Defect of 25kV Locomotive Cable Termination
	1 Introduction
	2 Electric Erosion of 25 kV Locomotive Cable Termination
	3 Numerical Simulation of Locomotive Cable Termination
		3.1 Model Construction
		3.2 Area Division and Parameter Assignment
		3.3 Simulation of Electric Field at the End of Cable Terminal Fittings
	4 Conclusion
	References
Assessment of Contact Quality in Rigid Catenary Considering the Structural Parameters
	1 Introduction
	2 Related Work
		2.1 Model of Rigid Catenary and Pantograph System
		2.2 Coupling Model of Rigid Catenary and Pantograph System
	3 Research Context
		3.1 Influence of Static Error on Contact Quality
		3.2 Influence of Span Length on Contact Quality
		3.3 Influence of Suspension Structure Stiffness on Contact Quality
	4 Conclusions
	References
Multi-scale Modeling and Simulation Method of Urban Rail Traction Power Supply System for Digital Twin
	1 Introduction
	2 Multi Scale Modeling Method
	3 Key Technologies of Multi Scale Simulation
	4 Multi Scale Modeling and Simulation Example
	5 Conclusion
	References
Analysis and Research on Seismic Performance of Catenary System on Sichuan-Tibet Railway
	1 Introduction
	2 Seismic Excitation Tests of Catenary System
		2.1 Full Scale Test Shaking Table
		2.2 Verification of the Finite Element Model
	3 Study on Seismic Performance of Catenary System
		3.1 Finite Element Model
		3.2 Seismic Response Analysis
	4 Conclusion
	References
Influence Assessment of the Overhead Catenary Types on the Tunnel Headroom in Sichuan-Tibet Railway
	1 Introduction
	2 Research and Analysis of Rigid Catenary in China
		2.1 Application Investigation
		2.2 Adaptability Analysis of Rigid Catenary
	3 Tunnel Clearance Section Demand
		3.1 Project Parameters
		3.2 Tunnel Clearance Requirements for Contact Suspension
	4 Comparison of Tunnel Investment with Different Catenary Types
		4.1 Single-Track Tunnel with Drilling and Blasting Method
		4.2 Double-Track Tunnel with Drilling and Blasting Method
		4.3 TBM Single-Track Tunnel
	5 Conclusion
	References
An Improved Power Capacity Configuration of Electrified Railway with Energy Storage System
	1 Introduction
	2 Energy Storage Scheme
		2.1 Topology of Traction Power Supply System with Energy Storage System
		2.2 Battery Energy Management Mode
	3 Specific Control Strategy
		3.1 Control Strategy of Four Quadrant Converter
		3.2 Control Strategy of Bidirectional DC/DC Converter
	4 Traction Load Power Analysis of Power Supply Arm
		4.1 Judge Rule of Traction Load of Power Supply Arm
		4.2 Threshold Selection of Charge and Discharge
	5 Test and Analysis of Single Arm Energy Storage System
	6 Conclusion
	References
Research on Hydrogen Power Station Accessing to Traction Power Supply System
	1 Introduction
	2 Scheme of Hydrogen Power Generation System
		2.1 Principle of Hydrogen Power Generation
		2.2 Technical Analysis
	3 Access Scheme of Hydrogen Power Generation System
		3.1 Topology
		3.2 Working Condition Classification
	4 Principle and Control Strategy of Negative Sequence Compensation
		4.1 Principle of Negative Sequence Compensation
		4.2 Control Strategy
	5 Simulation Analysis
		5.1 Simulation Parameters
		5.2 Simulation Results
	6 Conclusion
	References
Author Index