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风电场中铝合金电缆的应用 耐腐蚀性分析 35kV电缆导体选择

来源:  作者:电气设计视频教程  2018-11-28更新  758次阅读

1、铝合金电缆生产应用的现状和发展

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2.1 铝合金电缆相应电气性能

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2.2 铝合金电缆相应机械性能分析作为电缆,延伸率是其非常重要的机械性能指标,而电缆能够承受多大外力也要受到延伸率的影响,我们对铝合金电缆的主要机械性能进行了分析,其结果如下:首先,铝合金的延伸性能非常优越,铝合金电缆退火后可延伸三成以上,这与铜的延伸率相近,因此铝合金电缆在外力承受能力方面与铜芯电缆接近;其次,铝合金的柔韧性非常好,其弯曲性能强,因此在进行电缆安装操作时,接线端子连接的作业中铝合金电缆比铜电缆容易得多;再次,铝合金具有很强的抗蠕变性能。铝合金电缆的化学成分和制作工艺都较为特殊,其生产过程中进行抗蠕变强化处理,对于易发生冷流和过载问题的电场中应用铝合金电缆,会提高电力系统的稳定性。


2.3 铝合金电缆相应耐腐蚀性分析

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2.4 铝合金电缆相应环保性能分析

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3、在风电场中运用铝合金电缆的相关探讨

3.1 在风电场中进行铝合金电缆推广需面对的阻碍虽然如今铝合金电缆的生产和应用较为普遍,但由于其性能因素在电力网络中应用还不够普遍,现在就来就其中的原因进行分析:首先,电力行业的采购人员在对新型电缆材料的认识方面还没有随时代进行更新,由于之前所用的铝芯电缆存在较大的性能局限性,主观认为铝合金电缆的性能也不好,因此在电力行业进行铝合金电缆的广泛应用存在主观阻碍;其次,风电场由于环境相对复杂,因此在材料的选择方面对于质量、性能的要求非常高,在进行风电场电缆安装时对于新型材料尝试的谨慎性较高,虽然我国铝合金电缆生产厂家对于生产技术的把握能力并不比国外的同类厂家差,但由于针对电力系统的生产要求并不了解,在生产中对于电力设备检查标准也并没有给予关注,因此在规范化的铝合金电缆生产和实验方面还有一段相当长的路要走,同时电力系统也可以进行针对铝合金电缆的电气设计以提升风电场对于铝合金电缆应用的效果;最后,由于铝合金材料本身存在熔点低的问题,致使其对于高温的耐受性不足,对于环境复杂的风电场来讲,铝合金电缆的环境抵抗能力还有待进一步提升,否则将会导致供电设备的稳定运行无法得到现实保证,而风电场中的连续供电设备非常多,如果不能保证供电设备的连续稳定运行就会造成整个供电系统的运行稳定性下降。


3.2 在风电场中运用铝合金电缆的优势分析 树上鸟教育电气设计铜芯电缆的性能虽然符合当前电力行业的需求,然而其造价较高,且能耗较大,因此进行新型电缆材料的研究是符合电力系统发展趋势的,而铝合金电缆就是在这种情况下走入研究人员视野的,其应用的主要优势:首先,铝合金电缆的性价比非常高,如果作为阻燃电缆来应用铝合金电缆,其与同样电流量的铜芯电缆在价格上相差悬殊,铝合金电缆价格只是铜电缆的六成左右,并且总体性能并无太大差异;其次,铝合金电缆的安装施工非常便捷。铝合金电缆本身的密度低、韧性好,因此在进行电缆安装施工时,铝合金电缆较铜电缆存在较大的优势,同时,密度小的铝合金电缆在同等条件下对于支架和桥架的压力就较小,应用铝合金电缆对于电力支架设备的设计优化具有很好的促进作用。还有在现实应用中,铜电缆由于造价高,经常发生被盗事故,铝合金电缆则没有这方面的忧虑;最后,由于铝合金材料具有很好的节能环保性能,我国出台的一系列节能政策中就有“以铝代铜”,这是为了保护日益稀缺的铜资源,也是为了提升我国铝合金制造业的技术水平,这对于我国铝合金电缆的生产具有很好的促进作用。


4、风电场中的35kV 电缆导体选择

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