高压电器2023，Vol.59Issue(12)：201-208,8.DOI:10.13296/j.1001-1609.hva.2023.12.024
特高压直流线路复合绝缘子空气中冲击击穿试验仿真研究
Simulation Study on Impulse Puncture Test of Composite Insulator of UHV DC Line in Air
摘要
Abstract
The impulse puncture test in air is not only an important test item for the design and sampling test of com-posite insulator,but also a crucial means to inspect the quality of composite insulator products.When the amplitude method is used in the impulse puncture test,the potential and electric field distributions of the composite insulator are influenced by the voltage application distance and wiring mode.Therefore,the consistency and effectiveness of the test results under different test conditions need further investigation.In this paper,the finite element model of a type of UHVDC composite insulator is set up,and the potential and electric field distribution of the upper,middle and lower sections of the composite insulator in the impulse puncture test in the air are simulated under different elec-trode distances respectively.By analyzing the potential and electric field distributions in the core rod,inside,and sur-face of the sheath,it is observed that the maximum electric field strength at the upper and lower ends of the test sec-tion increases with the increase of the axial distance of electrodes and the breakdown voltage,while the electric field strength in the middle test section decreases with the increase of axial distance of electrode.It is proposed that the in-spection effectiveness for internal insulation defect is optimal when the axial electrode is selected around 100 mm in puncture test of composite insulator in the air.关键词
特高压/复合绝缘子/冲击击穿试验/幅值法/有限元法Key words
ultra-high voltage/composite insulator/impulse puncture test/amplitude method/finite element method引用本文复制引用
杨晓峰,孙梅,王奇,李士杰,韦晓星,赵永涛,张宇博,谢志成..特高压直流线路复合绝缘子空气中冲击击穿试验仿真研究[J].高压电器,2023,59(12):201-208,8.基金项目
国家重点研发计划项目(特高压设备及其组成系统宽频电磁暂态特性).Project Supported by the National Key Research and Development Program of China(Wideband Electromagnetic Transient Characteristics of Ultra-high Voltage Equipment and Its Integrated System). （特高压设备及其组成系统宽频电磁暂态特性）
