摘要
特高压直流换流站对接地网的接地电阻要求十分严苛,尤其是位于高电阻率地区,受限于经济技术原因,一般的降阻方案难以适用,提出了基于深井爆破接地技术的换流站接地网降阻技术,以鲁西换流站为研究对象,打6口深度为205 m的深井,并在井内实施地下爆破降阻。利用接地分析软件CDEGS进行安全性校核,分析了地网的地电位升、跨步电位差和接触电位差,并通过在现场接地网实施接地降阻技术前后的对比,验证了该方案的安全性与可行性。
The requirements of HVDC converter station upon grounding resistance is ve13~ strict. Especially in high resistivity area, limited by economic and technical reasons, the general resistance reduction scheme is difficult to apply. Therefore,taking Luxi con- verter station as research object, converter station ground resistance reduction plan is proposed based on deep well blasting ground- ing technology. Namely,drill out 6 deep wells with depth of 205 m, and underground borehole blasting is carried out in drillings. The grounding analysis software CDEGS is used for security check. The ground potential rise, step potential difference and contact poten- tial difference are analyzed,the safety and feasibility are verified through result comparison before and after the implementation of re- sistance reduction plan.
出处
《陕西电力》
2017年第5期88-92,共5页
Shanxi Electric Power
关键词
特高压直流换流站
接地网
降阻方案
深井爆破接地技术
接地阻抗测试
HVDC converter station
grounding grid
resistance reduction plan
deep well blasting grounding technology
grounding impedance test
