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

doi:10.11985/2021.01.011

Abstract

Abstract:

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.

Key words: Copper clad steel, composite metal, substation, grounding system, life cycle

CLC Number:

TM63
TM862

LI Yangsen, ZHANG Chengwei, LIU Song, WANG Pengfei. Research on the Application of New Hot Cast Copper Clad Steel Composite Metal Material in Substation Grounding System[J]. Journal of Electrical Engineering, 2021, 16(1): 77-82.

Figures/Tables 4

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材料类型	铜绞线 (120 mm²)			热铸铜覆钢(φ=14 mm,铜层厚度=0.8 mm)		热镀锌扁钢 (50 mm×8 mm)
材料类型	水平		接头	水平	接头	水平	接头
数量/(米/个)	1 800	120		1 800	120	1 800		400
单价/元	110	120		70	120	30		10
总价/×10³元	212.4			140.4		58.0
寿命/年	50			50		10
综合成本/×10³元	212.4			140.4		290.0
综合成本比较(%)	151			100		207

材料类型	纯铜材料	热铸铜覆钢材料	热镀锌钢材
柔软度	硬度小,柔软度强,基本无弹性	硬度适中,柔软度较强,基本无弹性	硬度大,弹性强
热稳定系数c	210	179	70
电阻率/×10^-8 (Ω·m)	1.72	4.00	9.78
过流能力	好	适中	差
施工便利性	施工简单	施工简单	效率低
使用寿命 (耐腐蚀性)	>50年	>50年	≤10年