柔性石墨接地体与金属接地体的耐腐蚀性对比
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摘要
传统金属接地体受到土壤的电化学腐蚀严重,为此,选择一种新型接地材料——柔性石墨接地体,与钢、铜等常用金属接地体的耐腐蚀性进行对比。根据5种常见土壤的腐蚀特性,采用室内腐蚀模拟试验,通过制备土壤模拟液和细砂模拟我国几种典型土质,对几种接地材料的腐蚀特性进行了研究。同时,针对接地材料腐蚀对接地电阻的影响,分别对相同长度及直径的铜、钢和石墨复合接地体3种接地材料腐蚀前后的接地电阻进行了对比测试。研究表明:石墨复合接地材料不受土壤条件的限制,其防腐蚀特性优于现行的钢、铜等金属接地材料;石墨复合接地材料腐蚀前后,其接地电阻基本无变化。
In order to solve the electrochemical corrosion in soil for traditional metal grounding body,the corrosion resistance of flexible graphite electrical grounding body and metal grounding body was measured and compared. According to the corrosion characteristics of five kinds of common soil,the soil simulation solutions and fine sands were prepared to simulate 5 typical soil,and the indoor corrosion simulation testing method was used to study the corrosion characteristics of several grounding materials. Moreover,in order to study the influence of grounding material corrosion on earthing resistance,the earthing resistance of copper,steel and graphite grounding materials with same length and diameter was measured and compared before and after corrosion tests. Results showed that the flexible graphite electrical grounding body was not restricted by soil condition. Its corrosion resistance was better than that of other grounding materials like current copper and steel. Besides,earthing resistance of flexible graphite electrical grounding body changed little before and after corrosion test.
In order to solve the electrochemical corrosion in soil for traditional metal grounding body,the corrosion resistance of flexible graphite electrical grounding body and metal grounding body was measured and compared. According to the corrosion characteristics of five kinds of common soil,the soil simulation solutions and fine sands were prepared to simulate 5 typical soil,and the indoor corrosion simulation testing method was used to study the corrosion characteristics of several grounding materials. Moreover,in order to study the influence of grounding material corrosion on earthing resistance,the earthing resistance of copper,steel and graphite grounding materials with same length and diameter was measured and compared before and after corrosion tests. Results showed that the flexible graphite electrical grounding body was not restricted by soil condition. Its corrosion resistance was better than that of other grounding materials like current copper and steel. Besides,earthing resistance of flexible graphite electrical grounding body changed little before and after corrosion test.
引文
[1]肖磊石,李谦,饶章权,等.南方电网接地网腐蚀故障诊断技术及其应用[J].南方电网技术,2013(6):89-93.
[2]杨道武,李景禄.发电厂变电所接地装置的腐蚀及防腐措施[J].电瓷避雷器,2004(2):43-45.
[3]Brad Stone.How to Fix the Grid[N].NEWSWEEK,2003-08-25.
[4]ZENG R,HE J L,HU J.The Theory and Implementation of Corrosion Diagnosis for Grounding System[J].IEEE Trans on Power Deleivery,2002,12(2):1 120-1 126.
[5]林雪梅.可膨胀石墨的化学氧化法制备研究进展[J].炭素,2006(4):44-48.
[6]顾安妍.膨胀石墨的制备及其导电性能的研究[D].重庆:重庆大学,2010:35-41.
[7]何小琴.土壤模拟溶液中酸碱度对X70Ce钢腐蚀行为的影响[D].包头:内蒙古科技大学,2010:13-14.
[8]何金良,曾嵘.电力系统接地技术[M].北京:科学出版社,2007:483-486.
[9]周蜜.钢制接地网土壤腐蚀特性及评价技术的研究[D].武汉:武汉大学,2011:42-58
[10]王森,胡亚博,李志忠,等.三种典型接地极材料在陕北土壤模拟溶液中的腐蚀行为[J].腐蚀与防护,2013,34(6):485-488.
[11]何智强,陈晓晖,黄宏峰,等.Q235、Q345钢在不同土壤环境中的腐蚀特性[J].电力建设,2011,32(5):91-93.
[2]杨道武,李景禄.发电厂变电所接地装置的腐蚀及防腐措施[J].电瓷避雷器,2004(2):43-45.
[3]Brad Stone.How to Fix the Grid[N].NEWSWEEK,2003-08-25.
[4]ZENG R,HE J L,HU J.The Theory and Implementation of Corrosion Diagnosis for Grounding System[J].IEEE Trans on Power Deleivery,2002,12(2):1 120-1 126.
[5]林雪梅.可膨胀石墨的化学氧化法制备研究进展[J].炭素,2006(4):44-48.
[6]顾安妍.膨胀石墨的制备及其导电性能的研究[D].重庆:重庆大学,2010:35-41.
[7]何小琴.土壤模拟溶液中酸碱度对X70Ce钢腐蚀行为的影响[D].包头:内蒙古科技大学,2010:13-14.
[8]何金良,曾嵘.电力系统接地技术[M].北京:科学出版社,2007:483-486.
[9]周蜜.钢制接地网土壤腐蚀特性及评价技术的研究[D].武汉:武汉大学,2011:42-58
[10]王森,胡亚博,李志忠,等.三种典型接地极材料在陕北土壤模拟溶液中的腐蚀行为[J].腐蚀与防护,2013,34(6):485-488.
[11]何智强,陈晓晖,黄宏峰,等.Q235、Q345钢在不同土壤环境中的腐蚀特性[J].电力建设,2011,32(5):91-93.