用电解地极法降低地网接地电阻的改造施工案例

Polar Electrolytic Method to Reduce the Transformation of Grounding Resistance Construction Cases

变电所全所防雷接地系统的室外工程主要由水平接地体（镀锌扃铁或镀锌圆钢）配套垂直接地极（镀锌角钢）联合组成，对土壤地质条件不好电阻率系数不良的地方，要在接地体周围敷设降阻剂以降低土壤电阻率，目前较常用的是干粉式Ⅲ型化学降阻剂，其效果虽好但较不稳定，且易对土壤地质环境存在污染。目前国内研发并使用了一种叫做DK—AG的电解地极，它是以“电解离子接地列阵”的专利技术为基础，综合国外其他电解地极优点研制成的一种降阻产品。该产品降阻效果好，稳定性高，投资较小，且无污染。采用DK-AG电解地极对220kV××变电所地网进行了第2次改造，与原方案相比，减少地网面积2500m^2，节约投资55-82％，工期由一个半月降至7天。

All of the mine substation grounding system works mainly by the level ground outside the body （galvanized flat iron galvanized round steel） supporting the vertical grounding （galvanized angle） formed,poor geological conditions,soil resistivity efficient bad place to be laid in the ground around the body reducing agent to reduce the soil resistivity, the current is more mmonly used dry powder type Ⅲ, chemical reduction agent,the effect is good but less stable,and easy on the soil there is the ological environment pollution.Domestic R ＆ D and use a technique called DK-AG polar electrolysis,which is based on lectrolytic ion ground array＂ of the patented technology based on the integrated foreign other advantages for the development of lar electrolysis of a reduction in resistance products.The product reduction in resistance,high stability, low investment,and llution.Electrolysis using DK-AG on the pole substation to 220kV ××2 network for the ftrst transformation,compared with the ginal plan to reduce to net area 2500 m^2,save 55.82% investment,construction period by a month and a half to 7 days.