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AC Loss and Contact Resistance of Resistive Type Fault Current Limiter Using YBCO Coated Conductors

机译:使用YBCO涂层导体的电阻型故障限流器的交流损耗和接触电阻

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Heat loss is one of the most important issues for resistive type superconducting fault current limiters (SFCL) built from YBaCuO-coated conductors. A newly designed 400 V SFCL module by Smart Grid Center, Shanghai Jiaotong University (SJTU) is tested and modeled in order to get a clear understanding of its characteristics of heat losses. Two main losses, including AC loss of superconducting tapes and the losses due to contact resistance inside the SFCL module are investigated. Experiments based on “electrical method” are set up to measure the AC loss at 77 K with lock-in amplifier conditions. Meanwhile, losses from the contact resistance are calculated by analyzing their V-I curve. To better understand the behavior of the AC loss in SFCL module and verify the accuracy of the experimental results, modeling analysis is performed by means of a 2-dimensional finite element modeling (FEM). Numerical results show that the results are very close to what we get from experimental method. Detailed results will be presented and the heat losses of 10 kV SFCL consisting of about 25 modules in series are going to be discussed.
机译:对于由YBaCuO涂层导体制成的电阻型超导故障限流器(SFCL),热损失是最重要的问题之一。通过对上海交通大学智能电网中心(SJTU)的最新设计的400 V SFCL模块进行测试和建模,可以清楚地了解其热损失的特征。研究了两个主要损耗,包括超导带的AC损耗和SFCL模块内部由于接触电阻引起的损耗。建立了基于“电气方法”的实验,以在锁定放大器条件下测量77 K时的交流损耗。同时,通过分析其V-I曲线可计算出接触电阻的损耗。为了更好地了解SFCL模块中AC损耗的行为并验证实验结果的准确性,通过二维有限元建模(FEM)进行了建模分析。数值结果表明,该结果与我们从实验方法获得的结果非常接近。将给出详细的结果,并将讨论由大约25个串联模块组成的10 kV SFCL的热损失。

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