Optimal design analysis of grounding grids for substations built in nonuniform soil

被引：0
|
作者：
Sun, WM [1 ]
He, JL [1 ]
Gao, YQ [1 ]
Zeng, R [1 ]
Wu, WH [1 ]
Su, Q [1 ]
机构：
[1] Shandong Elect Power Bur, Shandong 250001, Peoples R China
来源：
2000 INTERNATIONAL CONFERENCE ON POWER SYSTEM TECHNOLOGY, VOLS I-III, PROCEEDINGS | 2000年
关键词：
nonuniform soil; optimum arrangement; grounding grid; potential distribution; touch voltage;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The optimal design of grounding system can ensure the safety of substation. The influences of reflective coefficient of double-layer soil and the thickness of top-layer soil, the grounding grid area on the optimum arrangement of grounding system were analyzed by numerical method. It states the optimum compression ratio(OCR) should be determined by the target function of touch voltage reaching the minimum value. The OCR decreases with the increase of reflective coefficient, when the soil resistivity of the bottom-layer soil is smaller than that of upper-layer soil, the arranged horizontal conductors is more uniform than that when the soil resistivity of the bottom-layer soil is higher than that of upper-layer soil. The formulas to calculate the OCR of double-layers soil structure is obtained from analysis results, which can provide reference for the engineers to design the grounding system of substation with high safety.
引用
收藏
页码：1455 / 1460
页数：6
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