高土壤电阻率地区换流站复合接地网设计优化

摘要

Grounding grids designed by conventional methods can not satisfy requirement for limit value of grounding resistance of relevant regulations in those high soil resistivity areas, therefore, this paper introduces design methods for compound grounding grids by taking Luxi converter station in high soil resistivity area for an example, and studies influence of different design objectives by respectively taking restrict and loose limit value conditions for grounding resistance.It also presents corresponding design optimization schemes, adopts grounding analysis software CDEGS to check security of designed compound grounding grids and verifies related security and feasibility.%对于高土壤电阻率地区,使用常规方法设计的普通接地网难以满足相关规程的接地电阻限值要求.针对这一问题,以高土壤电阻率地区的鲁西换流站为例,介绍了复合接地网设计方法,研究了以严格和宽松接地电阻限值条件分别作为设计目标的影响,给出相应的设计优化方案,并利用电流分布、电磁场、接地、土壤结构分析(current distribution,electromagnetic fields,grounding and soil structure analysis,CDEGS)软件对所设计的复合接地网进行安全性校验,验证了其安全性和可行性.