摘要
为了解决在特高压盆式绝缘子运行过程中,因中心导体与盆体绝缘材料性能差异引起的界面烧蚀破坏现象,对绝缘材料界面处的场强集中效应进行了研究。首先以特高压交流盆式绝缘子中心导体与盆体绝缘材料之间界面处的场强为研究对象,应用有限元仿真计算分析了特高压盆式绝缘子界面处场强集中的原因,并采用涂覆界面材料的方法对界面处场强集中效应进行抑制。然后建立了含界面涂覆材料的盆式绝缘子模型,并推导出界面层两侧的场强与界面涂覆材料相关参数的关系式,进而得到不同的界面涂覆材料的界面层两侧的场强分布规律。研究结果表明:界面层厚度与缺陷高度相当,且相对介电常数>100时,界面层可以较好地屏蔽导体表面的缺陷;验证了模型的有效性。研究可为界面涂覆材料的设计和选择提供理论依据。
In order to solve the ablation damage caused by the differences of the electrical properties between the central conductor and basin insulation material, during the operation of UHV GIS spacer, the electric field strength concentration effect at the interface of the spacer was studied in this paper. Firstly, the electric field strength at the interface was taken as the research object, and the finite element simulation was used to analyze the reason why the electric field strength at the interface of the spacer is so concentrated. The method of coating the interfacial material was used to suppress the interfacial electric field concentration effect. Then the model of the spacer coated with interfacial material was established, and the relationship between the electric field strength on both sides of the interfacial coating materials and the parameters relating to the coating material were derived. In addition, the distribution of the electric field intensity on both sides of the interface layer of different interfacial coating materials was obtained. The research results verify the validity of the model and show that, when the thickness of the interface layer is equivalent to the height of the defect, and the relative dielectric constant is greater than 100, the interface layer can better shield the defects on the surface of the conductor. This study can provide a theoretical basis for the design and selection of interfacial coating materials.
作者
王闯
赵朗
孙青
王德意
卜越
彭宗仁
WANG Chuang;ZHAO Lang;SUN Qing;WANG Deyi;BU Yue;PENG Zongren(School of Electrical Engineering,Xi’an University of Technology,Xi’an 710048,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2020年第3期799-806,共8页
High Voltage Engineering
基金
国家自然科学基金(51707155)
陕西省自然科学基础研究计划(2018JQ5039).
