新型热铸铜覆钢复合金属材料在变电站接地系统中的应用研究

Research on the Application of New Hot Cast Copper Clad Steel Composite Metal Material in Substation Grounding System

阐述了变电站接地系统的原理及其重要性,针对国内外接地系统材料选择进行分析,归纳总结几种常用接地材料的优缺点,论证了变电站接地系统的基本条件;提出一种新型热铸铜覆钢复合金属材料,在高于1 150℃的高温无氧环境下,将液态铜通过独特热熔连铸技术铸在钢芯上,再经过特定的加工工艺,不仅具有良好的热稳定性能、过流能力和耐腐蚀性能,还具有极好的硬度和柔软度;以实际变电站接地工程为载体,从全寿命周期的角度分析其优越的经济特性能,并对其在电力系统接地中的进一步广泛应用研究提出建议。

Firstly, the principle and importance of substation grounding system are discussed. Secondly, selections of grounding system materials both in domestic and overseas are analyzed. The advantages and disadvantages of several common grounding materials are summarized and concluded, the basic conditions of substation grounding system are demonstrated. Thirdly, a new hot cast copper clad steel composite metal material is presented, of which the liquid copper is cast on the steel core through the unique hot melt continuous casting technology in the high temperature of over 1 150 ℃ without oxygen environment, and then made through the specific processing technology, with not only good thermal stability, flow capacity and corrosion resistance, but also excellent hardness and softness. Fourthly, taking practical substation grounding project as the carrier, the superior economic characteristics are analyzed from the perspective of the whole life cycle. Last but not the least, some suggestions are put forward on its further extensive application in power system grounding.