【作者】 赵冉；

【导师】 杨以涵；

【作者基本信息】 华北电力大学（北京） ， 电力系统及其自动化， 2007， 硕士

【摘要】 本文针对配电网接地方面的一些重要问题开展研究,内容涉及中性点接地方式、消弧线圈、小电流选线及相关设备的研制多个方面。在中性点接地方式选择问题上,从接地故障、线路保护、过电压三方面阐明了中性点谐振接地方式的优势。谐振接地方式的优势取决于消弧线圈的性能,电子式多分接头自动调谐消弧线圈集合了传统消弧线圈与电力电子技术的优点,是新型消弧设备的一个发展方向。该课题以消弧和选线并重的角度去设计新型消弧线圈,提出了改进型残流增量法的选线方法,使消弧线圈在消弧与选线两方面都能取得良好效果。新型消弧线圈的推广需要一个过渡,为了解决现场传统消弧线圈的选线问题,文章最后设计了残流增量发生装置,作为新型消弧线圈的辅助设备,配合传统消弧线圈完成消弧选线功能。论文通过理论分析、计算机仿真、硬件研制和实际实验多种形式阐明、解决上述问题,为配电网中性点谐振接地的采用提供了一套较为全面的解决方案,具有较强的工程实用性。更多还原

【Abstract】 This paper studies some important problems on neutral point earthing in distribution system. Itscontent refers neutral point treatment, arc-suppression coil, fault line detecting, and the designs ofrelated equipment. On the problem about neutral point treatment, it illuminates the advantage ofResonant Earthed Neutral System (RENS) through the aspects of earth fault, line protection andover voltage. The advantage of RENS lies on the performance of arc-suppression coil. Theelectronic tapping point & automatic tuning arc-suppression coil aggregates the advantages oftraditional coil and electronic technology, which is an orientation of new type coils. In this paper,the new type coil’s design gives attention to both extinction of arc and fault line detecting, and thepaper brings an amended residual current increment, which is a fault line detecting method andmakes the coil obtain better effects on both extinction of arc and fault line detecting. In the end, itdesigns equipment for engendering residual current increment, to work with traditional coils inpractical application as a transient way to the new type coil.The paper illuminates and resolves the problems above through theoretic analysis, computersimulation, hardware design,and physical experimentation, which brings an integral solution foradopting RENS, and is full of practicality.更多还原