一种新型深井爆破模型的建模与应用  

Modeling and Application of a New Deep Well Blasting Model

作　　者：王振伟 张学平 杜增 严雅琳 李奕霖 王磊 WANG Zhenwei;ZHANG Xueping;DU Zeng;YAN Yalin;LI Yilin;WANG Lei(State Grid Anhui Electric Power Co.,Ltd.,Hefei 23000,China;Anhui Quality Supervision Center for Electric Power Engineering,Hefei 230022,China;Maintenance Company of State Grid Hubei Electric Power Co.,Ltd.,Wuhan 430000,China;North China Electric Power University Baoding 071003,China;State Grid Hebei Electric Power Co.,Ltd.Cangzhou Power Supply Branch,Cangzhou 061000,China)

机构地区：[1]国网安徽省电力有限公司,合肥230031 [2]安徽省电力工程质量监督中心站,合肥230022 [3]国网湖北省电力有限公司检修公司,武汉430000 [4]华北电力大学,河北保定071000 [5]国网河北省电力有限公司沧州供电分公司,河北沧州061000

出　　处：《电瓷避雷器》2021年第6期113-119,共7页Insulators and Surge Arresters

摘　　要：针对变电站接地网深井爆破问题模型的不完善性,结合爆破理论,笔者提出了深井爆破模型。考虑了爆破情况,给出了深井爆破模型数值计算与程序计算方法,验证了该模型适用于均匀土壤与双层土壤条件。此外,给出该模型对应的接地系统接地电阻的求解方法,研究了不同影响因素,例如接地网尺寸大小,深井深度,爆破半径等对接地电阻的影响,总结了相关规律。结合浙江两变电站接地网实例,将本研究的深井爆破模型进行了应用,相对误差在5%以内,验证了该模型在实际工程中的正确性与有效性。Aiming at the imperfection of the model for deep well blasting of the substation grounding grid, combined with the blasting theory, the author proposes a new type deep well blasting model. Considering the blasting situation, the numerical calculation and program calculation methods of the deep well blasting model are given, which verifies that the new model is suitable for both the uniform soil and double-layer soil conditions. In addition, the method for solving the grounding resistance of the grounding system corresponding to this model is provided, and different influencing factors, such as the size of the grounding grid, the depth of the deep well, the blasting radius, etc., on the grounding resistance are studied, and the relevant laws are summarized. Combined with the grounding grid examples of two substations in Zhejiang Province, the deep well blasting model proposed in this paper is applied. The relative error of this method is less than 5%, which verifies the correctness and effectiveness of the model in practical engineering.

关 键 词：深井爆破降阻 接地降阻 深井爆破模型 

分 类 号：TM862[电气工程—高电压与绝缘技术] TM63