深井接地極在變電站接地網中的應用分析
田松
(廣東電網有限責任公司佛山供電局,廣東 佛山 528000)
摘 要:傳統的水平接地網由于面積受限難以滿足接地網的安全性日益提高的要求,離子接地深井這種降阻措施被逐步應用到接地網的降阻中。以典型的高土壤電阻率站址220 kV變電站設計為例,結合現場實測和仿真計算,計算不同深井接地參數下接地網性能的特性參數,仿真結果表明,離子接地深井降阻措施起到的效果比較有限,在變電站接地網設計中,不推薦使用該降阻措施。
關鍵詞:接地網;接地參數;深井接地極;CDEGS軟件
中圖分類號:TM645 文獻標識碼:A 文章編號:1007-3175(2019)01-0037-03
Application Analysis of Deep Well Grounding Electrode in Substation Grounding Grid
TIAN Song
(Foshan Power Supply Bureau of Guangdong Power Grid Co., Ltd, Foshan 528000, China)
Abstract: The traditional horizontal grounding grid is difficult to meet the increasing safety requirements of the grounding grid due to the limited area, so that the ion-grounded deep wells are gradually applied to the resistance reduction of the grounding grid. Taking the typical design of 220 kV substation in high soil resistivity site as an example and combining with the field measurement and simulation calculation, this paper calculated the characteristic parameters of grounding grid performance under different grounding parameters of deep wells. The simulation results show that the measurement of ion-grounded deep wells resistance reduction has limited effectiveness, which is not recommended in the design of transformer substation grounding grid.
Key words: grounding grid; grounding parameter; deep well grounding electrode; CDEGS
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