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Magnetic properties and their relation to the no-load noise and no-load losses of large power transformers

机译：大型电力变压器的磁性能及其与空载噪声和空载损耗的关系

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The performance of the no-load losses and core noise of large power transformers (LPT) can be attributed to the magnetic properties of the deployed grain-oriented electrical steel (GOES) material. Measurements of different GOES materials have led to findings about their performance. Four LPT cores, each with a mass of 40 metric tons, were manufactured out of 187 GOES coils with the same material grade but with different properties. Before the transformer cores were manufactured, each of the deployed GOES coils was measured with an in-house coil measurement system (CMS) to obtain the specific power losses and the magnetostriction. This paper shows a first comparison between the measured GOES coils magnetic properties and LPTs. First, the measured magnetostriction of the GOES coils and their predictability on core noise of the LPTs are evaluated. In addition, the assessment of the GOES coils specific power losses and the no-load losses of the LPT units are shown.
机译：大型电力变压器（LPT）的空载损耗和铁芯噪声的性能可归因于已部署的晶粒取向电工钢（GOES）材料的磁性能。对不同的GOES材料的测量导致了有关其性能的发现。用187个GOES线圈（材料等级相同但性能不同）制造了四个LPT铁心，每个铁心的质量为40公吨。在制造变压器铁心之前，使用内部线圈测量系统（CMS）对每个展开的GOES线圈进行测量，以获得特定的功率损耗和磁致伸缩。本文显示了测得的GOES线圈的磁性能和LPT之间的第一个比较。首先，评估了GOES线圈的测得的磁致伸缩及其对LPT磁芯噪声的可预测性。此外，还显示了对GOES线圈的比功率损耗和LPT单元的空载损耗的评估。

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