摘要
为了简化计算双层土壤结构中特高压输电线路杆塔接地电阻,提出了将双层土壤结构等效为均匀土壤结构的计算方法。采用CDEGS软件仿真不同反射系数、不同上层土壤的厚度、不同垂直接地体长度的数据计算等值土壤电阻率,通过非线性拟合,得到等值土壤电阻率的计算公式,从而计算特高压杆塔单塔基接地电阻。还通过数据拟合得到利用系数的计算公式,从而计算四塔基的接地电阻。最后对拟合公式计算的接地电阻与CDEGS软件仿真计算的接地电阻进行了比较分析,其结果表明,简化公式有较高的精度,可为工程设计提供参考。
In order to calculate the grounding resistance of ultra high voltage （UHV） tower In me two-layer soil, a new method for two-layer soil structure is presented. The equivalent soil resistivity can be calculated by simulating different reflection coefficients, top soil thicknesses and length of grounding electrodes with CDEGS software. A formula is obtained by nonlinear fitting tbr calculating the equivalent soil resistivity, and accordingly the resistance of UHV tower with single foundation is calculated. In order to calculate the resistance of UHV tower with four foundations, the simplified formula of utilization coefficient is obtained by data fitting. Finally, the grounding resistances of simplified formula and that of the CDEGS simulation have been compared, the results it can provide reference for the engineering design. show that the simplified formula is reliable, and
出处
《电瓷避雷器》
CAS
北大核心
2013年第3期132-136,共5页
Insulators and Surge Arresters
关键词
特高压杆塔
双层土壤
接地电阻
简化公式
仿真
UHV
tower
two-layer soil
grounding resistance
simplified formula
simulation
