摘要
由于公众对电磁环境问题的关注已成为电网发展的主要制约因素之一。因此本文重点对存在交叉跨越的特高压输电线路下方工频电场的影响因素进行分析研究。随着特高压输电工程的建设,交流超特高压输电线路不可避免地出现交叉跨越,交叉跨越区域内工频电场用二维的方法已无法满足计算要求。本文提出了采用ansoft有限元软件的三维电场模块来计算交叉跨越区域的工频电场,并分析其影响因素。计算结果表明,不同相位差对交叉跨越区域工频电场会造成一定的影响,而不同相序、对地高度则会产生明显的影响。在不增加建设成本的前提下,采取逆序排列能够明显地降低线下电场大小。
In recent years, people＇s requirement for electromagnetic protection is becoming more and more high. With the development of UHV （Ultra High Voltage）, the problem of electromagnetic environment has become the main factors for the development of the power grid. The research of this paper focuses on the influence factors of electric field when UHV transmission lines have cross spanning With the construction of UHV transmission project, AC E/UHV transmission lines inevitably appear cross spanning, the calculation method of power frequency electric field with two-dimensional has been unable to meet the requirements. This paper proposes 3-D electric field module of the ansoft software which is used to compute frequency electric field of cross area, and analyses the influence factors. The results show that power frequency electric field of cross area will be affected by the different phase difference. However, different phase sequence and different height of the UHV transmission lines will have significant influence on the power frequency electric field. In a word, On the premise of no increase of construction costs, it can obviously reduce electric field intensity by taking the reverse sequence arrangement.
出处
《电气技术》
2016年第1期6-10,共5页
Electrical Engineering
基金
国家自然科学基金(61174117)
关键词
超特高压
交叉跨越
三维有限元法
工频电场
extra/ultra high voltage
crisscross spanning
3-D finite element method
power frequency electric field
