变压器出线套管线夹开裂事故分析与预防
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摘要
电力设备质量是影响电网安全稳定运行的重要因素,近年浙江省主变压器套管线夹开裂事故频发,对输电设备运维工作和高压电缆运维工作提出了更高要求。以近期几起不同位置线夹失效事故为例,采用宏观形貌检查、光谱分析、金相组织、 SEM(扫描电子显微镜)及能谱分析等手段进行分析检测。结果表明,原材料组织疏松和季裂腐蚀是导致开裂事故频发的主要原因,并依此提出了相应的防范和改善措施。
The Power equipment quality is the key factor for safe and stable operation of power grid. In recent years, outlet casing clamp of main transformer cracked frequently in Zhejiang, which puts forword strict requirement on operation maintenance of transmission equipment, high-voltage cable operation. Taking clamp faults at various locations as an example, instruments such as macro structure analysis, spectrum analysis,metallographic examination, SEM(scanning electronic microscopy) and energy spectrum analysis are employed for analysis and inspection. The results show that the loose microstructure and the season cracking were the main causes for the clamp cracks. Besides, the corresponding prevention and improvement measures were proposed.
The Power equipment quality is the key factor for safe and stable operation of power grid. In recent years, outlet casing clamp of main transformer cracked frequently in Zhejiang, which puts forword strict requirement on operation maintenance of transmission equipment, high-voltage cable operation. Taking clamp faults at various locations as an example, instruments such as macro structure analysis, spectrum analysis,metallographic examination, SEM(scanning electronic microscopy) and energy spectrum analysis are employed for analysis and inspection. The results show that the loose microstructure and the season cracking were the main causes for the clamp cracks. Besides, the corresponding prevention and improvement measures were proposed.
引文
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[2]郑研,崔殊,李昊,等.铜铝过渡线夹故障探究与防范[J].东北电力技术,2018,39(1):43-50.
[3]杨军伟.铜铝过渡线夹事故分析及预防措施[J].电力科技,2017(9):213.
[4]董瑾,钟相源,安江英.变电站铜铝过渡设备线夹断裂原因[J].中国电力,2010,43(12):27-30.
[5]汤晓磊,陈国宏,刘俊建,等.平面接触型铜铝过渡设备线夹的大气腐蚀行为[J].电力建设,2014,35(4):65-69.
[6]胡家瑞,刘纯,欧阳克检,等.500 kV直流输电线路耐张线夹断裂的原因分析[J].电力建设,2012,33(7):82-85.
[7]王若民,吴刚,严波,等.高压输电用耐张线夹的失效分析[J].热处理,2018,33(4):41-47.
[8]卢振宇,李文胜,何凤生.500 kV变电站SSY型设备线夹断裂分析[J].广东电力,2015,28(3):77-81.
[9]丁传海.可锻铸铁耐张线夹断裂原因分析[J].铸造设备与工艺,2017(2):42-44.
[10]田泽,熊宇,叶建锋,等.某110 kV变电站隔离开关线夹断裂原因分析[J].湖北电力,2015,39(增刊):9-10.
[11]范巍,陈韶瑜,兰春虎.架空导线线夹表面氧化分析及改进措施[J].腐蚀与防护,2012,33(9):826-832.
[12]陈国宏,季坤,严波,等.高压输电耐张线夹的腐蚀行为及其影响因素[J].机械工程材料,2017,41(4):74-79.
[13]王坤,万书亭,杨迎春,等.500 kV输电铁塔金具线夹断裂原因[J].云南电力技术,2016,40(增刊):52-53.
[14]范明,夏强峰,屠晔炜,等.一起220 kV设备引线线夹的失效故障分析[J].浙江电力,2013,32(8):29-32.
[15]朱迪锋,吴坤祥,许杨勇.超特高压输电线路耐张线夹新缺陷分析与解决措施[J].内蒙古电力技术,2017,35(5):57-60.
[16]吴章勤.变电站铜铝过渡线夹的失效与检验[J].云南电力技术,2006,34(5):30-31.