高电压技术2018，Vol.44Issue(6)：1836-1843,8.DOI:10.13336/j.1003-6520.hve.20180529015
基于标准电容器的工频、冲击两用型分压器的研制
Development of Power-frequency and Impulse-voltage Voltage Divider Based on Standard Capacitor
摘要
Abstract
The high voltage standard capacitor has many advantages such as desired linearity, small temperature coefficient and being unaffected by the external environment. We introduced a kind of 600 kV dual-purpose voltage divider based on upright-type compressed-gas high-voltage standard capacitor. The finite element analysis software of ANSOFT was used to simulate the high voltage bushing. The installation position and dimension of the grounding shield and the middle potential shield were optimized. It is found that the average of two peak values of electric field along the outer surface of busing both is 0.5 kV/mm and the bushing utilization is the best with the voltage coefficient k of 41.6％. For the design of the electrodes, the shape and size of the high voltage electrode are determined by the value of electric field. The size of the shielded electrode is continuously optimized to uniform the electric field intensity on the surface of the low voltage electrode. In order to improve the dynamic behavior of the divider, the distance between the low voltage electrode and the out wall of the metal tank is only 25 mm. By a regression analysis, the voltage coefficient of the capacitor under power frequency voltage is less than 5×10-5. With the installation of low voltage arm, the step response of the divider is measured, and the partial rise time is 41.6 ns. Comparison with standard impulse resistive divider, the output waves of two dividers are in good agreement under lighting impulse voltage.关键词
标准电容器/屏蔽/冲击电压/ANSOFT/动态特性/电压系数Key words
standard capacitor/shielding/impulse voltage/ANSOFT/dynamic characteristics/voltage coefficient引用本文复制引用
龙兆芝,李文婷,刘少波,鲁非,肖凯,张弛..基于标准电容器的工频、冲击两用型分压器的研制[J].高电压技术,2018,44(6):1836-1843,8.基金项目
国家电网公司科技项目(JL71-15-043) （JL71-15-043）
国家自然科学基金(51607161).Project supported by Science and Technology Project of SGCC(JL71?15?043), National Natural Science Foundation of China(51607161). （51607161）
