Safety Considerations in the Design, Fabrication, Testing, and Operation of the DC Bias Coil of a Saturated Iron-Core Superconducting Fault Current Limiter
Safety Considerations in the Design, Fabrication, Testing, and Operation of the DC Bias Coil of a Saturated Iron-Core Superconducting Fault Current Limiter
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DOI：
10.1109/tasc.2012.2235493
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发表时间：
2013-06
影响因子：
1.8
通讯作者：
J. Cui;B. Shu;B. Tian;Y. W. Sun;L. Z. Wang;Y. Gao;L. Liu;Z. Wei;L. F. Zhang;X. H. Zhu;Q. Li;H. Hong;J. Cao;W. Gong;Y. Xin
中科院分区：
文献类型：
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作者：
J. Cui;B. Shu;B. Tian;Y. W. Sun;L. Z. Wang;Y. Gao;L. Liu;Z. Wei;L. F. Zhang;X. H. Zhu;Q. Li;H. Hong;J. Cao;W. Gong;Y. Xin
饱和铁芯限流器中超导偏置线圈的作用是对铁芯进行磁化。对于高压电网的实用设备，额定容量通常为100 MVA或更高。具有这种容量的饱和铁芯故障限流器的铁芯的尺寸和重量相当大，因此偏置线圈需要具有高磁化能力，因此需要具有大直径。偏置线圈的稳定性和安全性对于电力公司所要求的可靠性至关重要。经验告诉我们，在设计、制造、测试和电网运行中必须非常小心，以避免潜在的致命风险。本文将讨论和分析大尺寸超导偏置线圈可能存在的安全隐患，可能导致机械故障和电气冲击，对线圈造成重大损坏。危险的可能原因是配置不当、热循环过程中组件材料不匹配、制造过程中的制造故障、测试和操作中缺乏保护等。我们还将报告我们为消除或减少这些安全危险而采取的措施。
The function of the superconducting bias coil in a saturated iron-core fault current limiter is to magnetize the iron cores. For practical utility devices of HV power grids, the rated capacity is usually 100 MVA or higher. The size and weight of the iron cores of a saturated iron-core fault current limiter with such capacity is quite large, so the bias coil needs to have high magnetization capacity and consequently a large diameter. The stability and safety of the bias coil are of critical importance for the reliability required by power utilities. Experience taught us that great care must be taken in the design, fabrication, testing, and grid operation to avoid potentially fatal risks. In this paper, we will discuss and analyze the possible safety hazards for a large size superconducting bias coil, which may result in mechanical failure and electrical impact, causing significant damage to the coil. Possible causes of the hazards are improper configuration, mismatch of component materials during thermal cycling, manufacturing failures in fabrication, lack of protection in testing and operation, etc. We will also report measures we took to eliminate or reduce these safety hazards.