特高压论文：特高压模拟电荷法电晕放电工频电磁场无线电干扰环境影响评价

特高压论文：特高压模拟电荷法电晕放电工频电磁场无线电干扰环境影响评价
【中文摘要】1000kV特高压交流输电线路是我国目前电压等级最高的交流输电方式,具有输电距离远、输电容量大、节省输电线路走廊、降低输电损耗等特点。

建设特高压有利于优化我国能源配置、提高开发和利用效率,也是满足未来持续增长的电力需求的根本保证。

特高压电网是我国目前电网建设工作的重点。

随着社会环保意识的增强,特高压输电线路的电磁环境影响成为了人们关注的问题之一。

本文对特高压输电线路的电磁环境问题进行了研究。

论文基于模拟电荷法,并考虑高等级电压会产生电晕放电这一情况,建立特高压
工频电场计算模型,仿真结果表明电晕放电现象对地面工频电场有一定加强作用。

结合实地测量,验证了该算法的正确性和有效性。

研究了避雷线、导线分裂间距、相间距、线路高度、单回路不同架线方式、双回输电线相序等参数对地面工频电场的影响。

总结了工频电场的分布特点,提出了几种降低地面工频电场的方法：提高导线对地距离、减小相间距、单回路采用倒三角布置输电导线、双回路采用逆相序布置导线等措施可以减小地面的工频电场。

在特高压输电线路的工频磁场方面,本文建立了工频磁场的二维计算模型,仿真计算了我国特高
压单双回路共六种布线方式下的磁场分布,分析了各自场强的分布特点；研究了输电电流、导线对地高度、相间距离、单回路导线的不同
布置方式和双回路不同相序等因素分别对工频磁场的合成场强、垂直分量和水平分量的分布产生的影响,并对这些影响进行了定量分析,
为特高压输电线路的设计提供较为直观的参考意见。

在特高压输电线路的无线电干扰方面,简要阐述了电晕放电的物理过程和无线电干扰的几种特性。

详细介绍了导线表面电场强度的计算方法,仿真计算了几种典型特高压输电线路分裂导线的表面电场强度,并研究了导线对地高度,中相和边相,子导线半径等因素对导线表面电场的影响。

针对特高压分裂导线的分裂数较多,推荐用激发函数法计算输电线下的无线电干扰,并对我国特高压输电线路四种典型的导线布置形式进行仿真分析,结果表明子导线半径对无线电干扰的影响较导线布置方式和导线对地高度更为明显。

【英文摘要】At present, UHV AC Transmission Line is the highest level in China, with long transmission distance, high transmission capacity, saving transmission line corridors and reducing transmission losses. The construction of UHV transmission lines is beneficial to optimize the energy configuration, to improve the development and utilization efficiency, and also is the fundamental guarantee to meet the sustainable growth of power demand in the future. UHV power network is currently the focus of power grid construction in China. With the enhancement of social environmental protection consciousness, the effect of electromagnetic environment under
UHV transmission lines becomes one of the problems to which people pay close attention. In this paper, UHV transmission lines electromagnetic environment was studied.Based on the charge simulation method (CSM), the calculation of power frequency electric field is established which take the corona discharge into account around the UHV transmission lines. The calculation results show that the corona discharge enhances the power electrical field. The comparison between calculation and measurement proved that this method is correct and effective. Some factors which have influence on the electrical fields were discussed, including lightning shield line, wire division distance, position arrangement of phase conductors, conductor height above ground, different stringing methods in single circuit lines and phase order arrangement in double-circuit lines, etc. The distribution of power frequency electric field was summarized, some kinds of ways to reduce electrical field were given:increasing wire to ground distance, reducing the space between different phase lines, inverted triangle arrangement in single circuit, reversed phase sequence in double circuit line.The two-dimensional calculation model of power frequency magnetic field under UHV transmission lines was build. The magnetic field under transmission lines with six
kinds of phase conductor configuration was studied and the distribution features of them were analyzed by comparison. Some influencing factors in power frequency magnetic were studied, for example:load current, the distance of line to the ground, phase distance, different stringing methods in single circuit lines and phase order arrangement in double-circuit lines, etc. The effect on vertical component, horizontal component and synthesis component of power frequency magnetic field were analyzed quantitatively and some good advisory opinions to the UHV transmission line design would be given.The physical process of corona discharge was decrypted briefly and several characteristics of radio interference in UHV transmission lines were introduced. The calculation method of the conductor surface electrical field strength was studied seriously. The surface E-field of different UHV transmission line bundle conductors was calculated and studied. The relations between the distance of conductor to ground, middle phase, boundary phase conductors, sub-conductor radius and conductor surface field strength were investigated. Because there are more than 4 sub-conductors in UHV transmission line, the excitation function was recommended to calculate the radio interference under UHV transmission line. There were four kinds of UHV single
circuit transmission line in the radio interference
calculation model. In the result, the effect of sub-conductor radius was more obvious than stringing methods and conductor height above ground.
【关键词】特高压模拟电荷法电晕放电工频电磁场无线电干
扰环境影响评价
【英文关键词】Ultra-High Voltage (UHV) Charge Simulation Method (CSM) corona discharge power frequency Electromagnetic field radio interference environmental impact assessment
【目录】特高压输电线路电磁环境的数值仿真研究摘要
4-5Abstract5-6目录7-10 1 绪论10-18 1.1 课题背
景10-14 1.1.1 我国发展特高压输电的必要性10-12 1.1.2 电
磁环境问题是制约我国特高压线路建设的一个关键问题
12-14 1.2 特高压交流输电线路电磁环境的研究概况
14-17 1.2.1 国外研究情况14-15 1.2.2 国内研究情况
15-17 1.3 论文的主要工作17-18 2 工频电磁场数值计算方法
介绍18-27 2.1 常用的电磁场数值计算方法18-19 2.2 数值计
算方法的比较19-21 2.3 模拟电荷法21-26 2.3.1 模拟电荷法
的基本思想21 2.3.2 模拟电荷法的计算步骤21-22 2.3.3 模
拟电荷与匹配点选择的注意事项22-23 2.3.4 输电线中采用的模
拟电荷的类型和电位系数23-26 2.4 小结26-27 3 1000kV特高
压输电线路工频电场的数值仿真研究27-42 3.1 工程近似
27-28 3.2 考虑电晕影响的特高压输电线路工频电场的计算模型
28-33 3.2.1 计算方法28-32 3.2.2 典型输电线路的计算分析
32-33 3.3 特高压输电线路工频电场的影响因素33-41 3.3.1
输电导线对地高度的影响33-34 3.3.2 相间距离的影响
34-35 3.3.3 导线分裂间距35-36 3.3.4 避雷线的影响
36-37 3.3.5 子导线半径的影响37-38 3.3.6 单回路导线不同
布置形式的地面工频电场的分布38-39 3.3.7 双回路导线的相序
布置不同对地面工频电场的影响39-41 3.4 小结41-42 4
1000kV特高压输电线路工频磁场的仿真研究42-55 4.1 计算方法42-44 4.1.1 计算工频磁场时输电导线的镜像42-43 4.1.2 工频磁场的二维计算方法43-44 4.2 几种典型的特高压输电线路工频磁场的分布特性44-47 4.2.1 我国特高压输电线路的排列方式44-45 4.2.2 特高压交流输电线路工频磁场的仿真研究45-47 4.3 特高压输电线下工频磁场的主要影响因素47-52 4.3.1 线路输电电流的影响47 4.3.2 输电导线对地高度的影响47-48 4.3.3 相间距离的影响48-49 4.3.4 单回路导线不同布置方式的影响49-51 4.3.5 双回路导线不同相序的工频磁场分布51-52 4.4 特高压交流输电线路工频磁场的限值讨论52-54 4.5 小结54-55 5 1000kV特高压输电线路无线电干扰的仿真研究55-68 5.1 架空输电线路的电晕放电现象介绍55-57 5.1.1 电晕放电的物理解释55-56 5.1.2 电晕放电产生的几种常见效应56-57 5.1.3 影响输电线路电晕放电程度的主要因素57 5.2 输电导线表面电场强度的计算研究57-60 5.2.1 导线表面电场强度的计算57-59 5.2.2 几种特高压分裂导线的表面电场计算59-60 5.3 无线电干扰的计算研究60-66 5.3.1 无线电干扰的特性分析60-63 5.3.2 各种输电线路的无线电干扰计算63-64 5.3.3 特高压输电线路无线电干扰的场强计算64-66 5.4 特高压输电线路无线电干扰的分析预测66-67 5.5 小结67-68 6 结论68-70 6.1 文章的主要工作和总结68-69 6.2 需要进一步研究的问题69-70参考文献70-72
致谢72-73个人简历、在学期间发表的学术论文与研究成果73【索购全文找】1.3.9.9.3.8.8.4.81.3.8.1.1.3.7.2.1
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