电测与仪表2017，Vol.54Issue(14)：105-111,7.
600 kV高压标准电容器的研制
Development of a 600 kV high-voltage standard capacitor
摘要
Abstract
This paper introduces an upright type high voltage standard capacitor compressed-gas of SF6, which can measure the power frequency voltage of 600 kV and 1200 kV impulse voltage.The finite element analysis software of ANSOFT was used to simulate the high voltage bushing.The position and size of the grounding shield and the middle potential shield were optimized.While the voltage coefficient k is 41.6% of the middle potential shield, the bushing utilization is the best.For electrodes designing, the diameter and the upper and lower arcs of high voltage electrode are determined by the electric field strength, and we continuously optimize the size of the shielding electrode, the electric field strength of the surface of the low voltage electrode as possible.Under the lightning impulse withstand voltage of 1 440 kV, the maximum electric field inside the device shell is 18.1 kV/mm.In order to improve the frequency characteristics of the divider, the distance between the low voltage electrode and the inner wall of the shell is only 15 mm.According to the size and material of the electrodes, the calculated temperature coefficient of the standard capacitor is 2.05×10-5/K, and voltage coefficient is 5.5×10-7 with 600 kV voltage.The change of capacitance caused by eccentricity is 3.95×10-5, which is the fixed error after electrodes installation.关键词
标准电容器/屏蔽,ANFOST/频率特性/温度系数/电压系数Key words
standard capacitor/shielding,ANSOFT/frequency characteristics/temperature coefficient/voltage coefficient分类
信息技术与安全科学引用本文复制引用
龙兆芝,李文婷,刘少波,鲁非,张弛,肖凯..600 kV高压标准电容器的研制[J].电测与仪表,2017,54(14):105-111,7.基金项目
国网公司项目(JL71-15-043) （JL71-15-043）
