摘要
为深入了解变电站接地网参数对其接地性能的影响,采用Sobol’全局灵敏度分析法,以变电站接地网接地电阻为目标函数,通过Latin超立方采样技术对影响接地电阻的多种参数进行采样,计算分析了各个参数的1阶灵敏度系数(FSC)及总灵敏度系数(TSC)。结果表明,Sobol’灵敏度分析法可较好地定量分析影响变电站接地电阻的相关参数对接地电阻的影响程度。接地网面积、土壤电阻率的总灵敏度系数分别为-0.896、0.881,对接地电阻影响较大;接地网埋深与垂直接地极长度的总灵敏度系数分别为其1阶灵敏度系数的6.74倍及8.62倍,说明这2个参数与其他参数间有着较强的相互作用,需要综合考虑其对接地网接地电阻的影响。
To further understand the effects of grounding grid parameters on performances of the grid, the Sobol＇ global sensitivity method is used to calculate the first sensitivity coefficient（FSC） and total sensitivity coefficient（TSC） of each parameter which influences the grounding resistance, where the grounding resistance is selected as an object function and the Latin hypercube sampling technique is applied. The results show that the sensitivity of the relative parameters which have effects on grounding resistance can be well numerically analyzed by the Sobol＇ method. The grounding grid＇s area and soil resistivity have great effects on the ground resistance of grounding grid, and the TSCs of these parameters are -0.896 and 0.881, respectively. The TSCs of the burial depth and length of vertical grounding electrodes of grounding grid are 6.74 times and 8.62 times of its FSC, which shows that the two parameters have strong interaction with other pa- rameters. Hence, it is necessary to consider their effects on ground grid comprehensively.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2017年第1期300-306,共7页
High Voltage Engineering
基金
国家自然科学基金(51307109)~~
关键词
变电站接地网
接地电阻
Sobol’法
灵敏度分析
Latin超立方采样
1阶灵敏度
总灵敏度
substation grounding grid
ground resistance
Sobol＇ method
sensitivity analysis
Latin hypercube sampling
first sensitivity coefficient
total sensitivity coefficient
