直流气体绝缘管道输电系统中气-固界面电荷特性研究

第1章绪论

1.1研究背景及意义

1.1.1高压直流输电

1.1.2气体绝缘管道输电

1.1.3直流GIL的绝缘问题

1.2国内外研究现状

1.2.1气固界面电荷积聚的早期研究基础

1.2.2气固界面电荷积聚的近期研究动态

1.2.3气固界面电荷积聚的研究现状小结

1.2.4气固界面电荷积聚研究存在的问题

1.3本书的主要工作

第2章基于缩比GIL的气固界面电荷测量系统设计

2.1静电探头法的测量原理

2.1.1无源静电探头的测量原理

2.1.2有源静电探头的测量原理

2.1.3有源静电探头对电场的影响

2.2基于缩比GIL的气固界面电荷测量平台

2.2.1绝缘子制作和电极结构设计

2.2.2实验装置和测量平台

2.3二维平面的气固界面电荷测量平台

2.4粉尘图的制作

2.5本章小结

第3章基于数字图像处理技术的气固界面电荷反演算法

3.1电荷反演问题的提出

3.2平移改变系统的电荷反演算法

3.2.1平移改变系统及其传递函数矩阵元素

3.2.2传递函数矩阵的病态特性

3.2.3基于吉洪诺夫正则化的维纳滤波器

3.2.4基于点扩散函数的空间分辨率分析

3.2.5仿真算例及计算精度分析

3.3平移不变系统的电荷反演算法

3.3.1平移不变系统算法设计的基本原理

3.3.2二维傅里叶变换和维纳滤波器

3.3.3系统的空间分辨率分析

3.3.4仿真算例和计算精度分析

3.4实测效果和算法验证

3.5本章小结

第4章直流电场中气固界面电荷积聚特性及其动力学模型

4.1气固界面电荷积聚实验现象

4.1.1空气中的气固界面电荷积聚现象

4.1.2SF6中的气固界面电荷积聚现象

4.2气固界面电荷积聚的两种模式

4.2.1基本模式

4.2.2电荷斑模式

4.3气固界面电荷积聚的动力学模型

4.3.1建立模型

4.3.2实验结果与仿真结果的对比

4.3.3仿真体积电导率对电荷积聚的影响

4.3.4仿真表面电导率对电荷积聚的影响

4.4对气固界面电荷积聚理论的实验验证

4.4.1不同体积电导率的绝缘子表面电荷积聚

4.4.2温度梯度下的绝缘子表面电荷积聚

4.4.3高离子浓度气体中的绝缘子表面电荷积聚

4.5本章小结

第5章气固界面电荷消散特性及其动力学模型

5.1实验设计

5.1.1实验样品

5.1.2充电电路

5.1.3研究内容

5.2环氧树脂材料表面电荷消散的观测

5.2.1开放气体空间中的气固界面电荷消散

5.2.2有限气体空间中的气固界面电荷消散

5.2.3离子风中的气固界面电荷消散

5.3气固界面电荷消散的动力学过程建模

5.4数值计算结果与实验结果的对比

5.4.1体电导主导的气固界面电荷消散

5.4.2气体离子中和主导的气固界面电荷消散

5.4.3面电导主导的气固界面电荷消散

5.5材料的本征电荷消散与表面陷阱能级

5.5.1等温电流衰减理论

5.5.2陷阱密度与表面电位衰减

5.5.3表面电位衰减测量和表面陷阱能级计算

5.6本章小结

第6章抑制表面电荷积聚的环氧复合材料改性探究

6.1环氧树脂材料本体改性的研究

6.1.1Al2O3纳米颗粒掺杂

6.1.2富勒烯掺杂

6.2环氧树脂材料表面改性的研究

6.2.1表面氟化处理

6.2.2二维纳米涂层

6.3本章小结

第7章结论

参考文献

在学期间发表的学术论文与研究成果

致谢

Contents

1Introduction

1.1Research Background and Significance

1.1.1High Voltage Direct Current Transmission

1.1.2Gas Insulated Transmission Line

1.1.3Insulation Problems of GIL

1.2Research Status of GasSolid Interface Charge

Accumulation

1.2.1Early Research Basis

1.2.2Recent Research Trends

1.2.3Brief Summary of Research Status

1.2.4Existing Problems

1.3Main Contents of This Book

2Design of Surface Charge Measurement System for Downsized

GIL Model

2.1Measurement Principle of the Electrostatic Probe

2.1.1Measurement Principle of Passive Electrostatic

Probe

2.1.2Measurement Principle of Active Electrostatic

Probe

2.1.3Effect of Active Electrostatic Probe on Electric

Field

2.2Surface Charge Measuerment Platform Based on A

Downsized GIL

2.2.1Manufacture of Insulators and Design of Electrode

System

2.2.2Experimental Setup and Measurement Platform

2.3Surface Charge Measurement Platform for 2D Surface

2.4Production of DustFigure

2.5Summary

3Inversion Algorithm of Surface Charge Calculation Based on the

Digital Image Processing Technique

3.1Propose of the Inversion Algorithm for Surface Charge

Calculation

3.2Inversion Algorithm for ShiftVariant System

3.2.1ShiftVariant System and Transfer Function Matrix

Components

3.2.2The IllPosed Feature of Transfer Function

Matrix

3.2.3Wiener Filter Based on Tikhonov’s Regularization

3.2.4Spatial Resolution of the Algorithm Based on

the PSF

3.2.5Numerical Simulations and Accuracy Analysis

3.3Inversion Algorithm for ShiftInvariant System

3.3.1The Principle of Algorithm for ShiftInvariant

System

3.3.22D Fourier Transform and Wiener Filter

3.3.3Spatial Resolution Analysis

3.3.4Numerical Simulations and Accuracy Analysis

3.4Expreiment Results and the Verify of Algorithm

3.5Summary

4Surface Charge Accumulation Characteristics and Its Kinetic Model

4.1Experimental Phenomenon of Surface Charge

Accumulation

4.1.1Surface Charge Accumulation in the Air

4.1.2Surface Charge Accumulation in the SF6

4.2Two Patterns of GasSolid Interface Charge

Accumulation

4.2.1Dominant Uniform Charging

4.2.2Charge Speckles

4.3Simulation Model of GasSolid Interface Charge

Accumulation

4.3.1Model Building

4.3.2Comparison of Experimental Results and Simulation

Results

4.3.3Influence of Volume Conductivity on Charge

Accumulation

4.3.4Influence of Surface Conductivity on Charge

Accumulation

4.4Experimental Validation of Surface Charge Accumulation

Theory

4.4.1Influence of Volumn Conductivity

4.4.2Surface Charge Accumulation Under Temperature

Gradient

4.4.3Surface Charge Accumulation In Ionizing Gas

4.5Summary

5Surface Charge Dissipation Characteristics and Its Kinetic Model

5.1Experimental Design

5.1.1Test Samples

5.1.2Charging Circuit

5.1.3Research Contents

5.2Observation of Surface Charge Dissipation of Epoxy Resin

5.2.1Surface Charge Dissipation In Free Gas Volume

5.2.2Surface Charge Dissipation in Limited Gas Volume

5.2.3Surface Charge Dissipation in Ionizing Air

5.3Modeling of the Kinetic Process of Surface Charge

Dissipation

5.4Comparision of Numerical Calculations and Experimental

Results

5.4.1Surface Charge Decay Dominated by Volumn

Conducivity

5.4.2Surface Charge Decay Dominated by Gas

Neutralization

5.4.3Surface Charge Decay Dominated by Surface

Conducivity

5.5The Intrinsic Charge Dissipation and Surface Trap Energy of

Insulator

5.5.1Isothermal Current Decay theory

5.5.2Trap Denisity and Surface Potential Decay

5.5.3Surface Potential Decay Measurement and Surface

Trap Energy Caculation

5.6Summary

6Material Modification to Suppress Surfce Charge Accumulation

6.1Bulk Modification of Epoxy Resin Material

6.1.1Al2O3Filled EpoxyResin

6.1.2FullereneFilled EpoxyResin

6.2Surface Modification of Epoxy Resin Material

6.2.1Fluorination of Insulator Surface

6.2.22D NanoLaminar Coating

6.3Summary

7Conclusions

References

Published Papers and Achievements

Acknowledgements