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首页> 外文期刊>Pomiary Automatyka Kontrola >Suszenie transformatorów energetycznych na stanowisku pracy technologią grzania prądem niskiej częstotliwości - doświadczenia praktyczne
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Suszenie transformatorów energetycznych na stanowisku pracy technologią grzania prądem niskiej częstotliwości - doświadczenia praktyczne

机译:使用低频电流加热技术在工作场所烘干能源变压器-实践经验

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W artykule przedstawiono stosowane metody suszenia transformatora na miejscu zainstalowania. Podano opis technologii grzania uzwojeń prądem niskiej częstotliwości (LFH). Przedstawiono elementy instalacji, opis przebiegu samego procesu i jego kluczowe parametry. Skuteczność działania metody LFH zaprezentowano na podstawie wybranych projektów, dla jednostek różnej wielkości, napięć i konstrukcji.%The introduction contains general information about presence and distribution of moisture in power transformers. Sources of water as well as corresponding threats influencing transformer operational safety and reliability are presented. Further, the authors briefly describe the methods typically used for on-site transformer drying as alternatives to Low Frequency Heating. The core of the paper is comprised of a detailed description of the LFH method, which is an advanced field service proposition of transformer condition improvement, engineered and deployed in numerous countries by ABB Transformer Service. The LFH installation components as well as the drying process description and key monitored parameters are given. The effectiveness of the LFH method is proven basing upon selected on-site projects pertaining transformers of different sizes, HV level, design and operation regime. Additional focus is placed on the significance of high vacuum in the drying process especially with regard to its effectiveness, which is then comparable with vapour phase factory drying. Finally,, examples of the LFH combined with oil reclaiming during on-site projects are given. Through such approach, not only is the actual transformer condition improved and risk of failure diminished, but also the expected transformer lifetime may be significantly extended due to inhibited degradation of the oil-paper insulation system.
机译:本文介绍了现场应用的变压器干燥方法。给出了加热低频绕组(LFH)技术的描述。介绍了安装的元素,过程本身的描述及其关键参数。在选定的项目基础上,针对不同尺寸,电压和结构的单元,介绍了LFH方法的有效性,该引言包含有关电力变压器中水分的存在和分布的一般信息。介绍了水源以及影响变压器运行安全性和可靠性的相应威胁。此外,作者简要介绍了通常用于现场变压器干燥的方法,以替代低频加热。本文的核心内容是LFH方法的详细说明,这是变压器状况改善的高级现场服务提议,由ABB变压器服务公司在许多国家设计和部署。给出了LFH安装组件以及干燥过程说明和关键监控参数。 LFH方法的有效性是基于与不同尺寸,HV水平,设计和运行方式相关的变压器的选定现场项目证明的。额外的重点放在干燥过程中高真空的重要性上,尤其是在有效性方面,这可以与气相工厂干燥相媲美。最后,给出了LFH与现场项目中的石油回收相结合的实例。通过这种方法,不仅可以改善变压器的实际状况并降低故障风险,而且由于可以抑制油纸绝缘系统的退化,因此可以大大延长变压器的预期寿命。

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