Researches On Arc-Suppression And Fault Line Detection In Distribution System

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.