摘要
如何有效地降低接地电阻、最大接触电压和最大跨步电压是复杂大型接地网设计经常碰到的一个难题。应用CDEGS仿真分析传统经验法设计的一个500 kV变电站接地网存在危险过电压、资源浪费等现象,通过大量仿真研究,找到该地网设计的最佳方案。CDEGS在土壤、地网建模等方面有着精确、灵活的优势,应用它进行复杂大型接地网设计能够取得良好技术经济效益,保证地网运行安全可靠。
How to effectively reduce grounding resistance, the maximum contact potential difference, and maximum step voltage of grounding grids are often encountered problems in complicated large grounding grid design. CDEGS simulation was used to analyze the danger overvoltage and resource waste existing in 500 kV substation grounding grid design using traditional expe- rience methods. The optimization design scheme was obtained by a large amount of simulation researeh and CDEGS was proved to have remarkable advantages on soil and grounding grid modeling. Application of CDEGS on complicated grounding grid design is economic and reliable for safety operation of grounding grid.
出处
《湖南电力》
2010年第2期4-8,27,共6页
Hunan Electric Power
