深井接地極在變電站接地網(wǎng)中的應(yīng)用分析
田松
（廣東電網(wǎng)有限責(zé)任公司佛山供電局，廣東 佛山 528000）
摘 要：傳統(tǒng)的水平接地網(wǎng)由于面積受限難以滿足接地網(wǎng)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(yīng)用到接地網(wǎng)的降阻中。以典型的高土壤電阻率站址220 kV變電站設(shè)計(jì)為例，結(jié)合現(xiàn)場(chǎng)實(shí)測(cè)和仿真計(jì)算，計(jì)算不同深井接地參數(shù)下接地網(wǎng)性能的特性參數(shù)，仿真結(jié)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(wǎng)設(shè)計(jì)中，不推薦使用該降阻措施。
關(guān)鍵詞：接地網(wǎng)；接地參數(shù)；深井接地極；CDEGS軟件
中圖分類號(hào)：TM645 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：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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