
大型卷铁心节能牵引变压器理论建模与制造工艺:LARGE ENERGY-SAVING WOUND CORE TRACTION TRANSFORMER — THEORETICAL MODELING AND
作 者 : 高仕斌,周利军,张陈擎宇
定 价 : 158 元
ISBN
号 : 9787577402154
出 版 社 : 西南交通大学出版社
出版日期 : 2024-12-01
版 次 : 1
印刷日期 : 2024-12-01
印 次 : 1
页 数 : 405
字 数 : 833000
装 帧 : 精装
开 本 : 16开

This book delves into the innovative realm of wound core transformers designed for high-voltage power grids, moving beyond the traditional laminated core structures prone to magnetic flux leakage and energy dissipation. Through a novel enclosed wound core design that eliminates joints and corners, it presents a transformative approach that minimizes leakage and enhances the electromagnetic performance of transformers. This book not only addresses the technical challenges and solutions in transformer design but also marks a significant step forward in the pursuit of energy efficiency and performance optimization in electrical power systems. Targeting a specialized audience of professors, scholars, and graduate students engaged in transformer energy-saving optimization and related research fields,it offers an in depth exploration of the complete loss calculation,innovative manufacturing processes, and testing technologies of largescale wound core transformers.
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- 1 Introduction
- 1.1 Introduction to Traction Power Supply System
- 1.2 Overview of Energy-Saving Wound Core Traction Transformer
- 1.3 Theoretical and Technical Challenges Faced by/Large-Capacity Wound Core Traction Transformers
- 1.3.1 Theoretical Challenges
- 1.3.2 Technical Challenges
- 2 Modeling and Loss Calculation for Eddy Current Field of Wound Cores in Traction Transformers
- 2.1 The Method for Analyzing and Calculating Eddy Current Losses in Multi-Layer Stepwise Gradient Silicon Steel Sheets
- 2.1.1 Analytical Calculation of Two-Dimensional Rectangular Domain Eddy Current Field
- 2.1.2 Single-Layer Trapezoidal Silicon Steel Sheet: Loss Calculation and Simulation Analysis
- 2.1.3 Calculation of Eddy Current Losses in Multi-Layer Continuous Trapezoidal Silicon Steel Sheets
- 2.1.4 Conclusion
- 2.2 Homogenized Eddy Current Field Analysis Model for Wound Core Electromagnetic Anisotropy
- 2.2.1 Coordinate Standardization of Electromagnetic Characteristic Parameters
- 2.2.2 Solution for Transverse Parameters of the Equivalent Conductivity Matrix
- 2.2.3 Solution for Normal Parameters of Equivalent Magnetic Permeability Matrix
- 2.2.4 Finite Element Analysis and Loss Calculation of Eddy Current Field
- 2.2.5 Model Validation and Test Analysis
- 2.3 Summary
- 2.4 Calculation Method for Eddy Current Losses in Wound Cores for Practical Engineering
- 2.4.1 Analytical Calculation of Eddy Current Losses Under Magnetic Flux Classification Constraint
- 2.4.2 Analytical Calculation of Eddy Current Losses Under Nonlinear Magnetic Characteristics
- 2.4.3 Loss Coupling Model Considering Heterogeneous Magnetic Boundary Values and Nonlinear Magnetic Characteristics
- 2.5 Summary
- 3 Wound Core Traction Transformer Winding: Modeling and Calculation of Distributed Parameters
- 3.1 N-Order Ladder Network Circuit Model
- 3.2 Calculation of Distributed Inductance Parameters
- 3.3 Calculation of Distributed Capacitance Parameters
- 3.3.1 Effective Permittivity of Medium
- 3.3.2 Longitudinal Equivalent Capacitance Parameters
- 3.3.3 Capacitance to Ground Parameters
- 3.3.4 Inter-winding Capacitance Parameters
- 3.4 Calculation of Distributed Resistance Parameters
- 3.5 State-Space Equation Modeling
- 3.6 Model Verification and Optimization
- 4 Temperature Rise Modeling and Thermal Performance Analysis of Wound Core Traction Transformers
- 4.1 Analysis on Heat Transfer Process in Wound Core Traction Transformers
- 4.1.1 Heat Dissipation Modes of Wound Core Traction Transformers
- 4.1.2 Fluid Flow Patterns
- 4.1.3 Theory of Natural Oil Circulation
- 4.2 Simulation Modeling and Testing Verification of Computational Fluid Dynamics
- 4.2.1 Temperature Rise Test of Traction Transformers
- 4.2.2 Computational Fluid Dynamics Model of Temperature Rise in Traction Transformers
- 4.3 Research on Temperature Field and Oil Flow Field of Wound Core Traction Transformer
- 4.3.1 Research on Temperature Field and Oil Flow Field of Steady-State Wound Core Traction Transformer
- 4.3.2 Research on Temperature Field and Oil Flow Field of Wound Core Traction Transformer Under Step Loads
- ……
- 5 Design and Manufacturing Technology of Wound Core Transformers
- 6 Fault Diagnosis Methods for Large Wound Core Traction Transformers
- 7 Testing and Application of QYS-R-(31500+25000)/220 Wound Core Traction Transformer
- Appendix A: Calculation Process of Main Insulation Check
- Appendix B: Calculation Process of Disc Mechanical Strength
- References
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