Design And Research Substation Lightning Grounding Protection

Electrical energy has become the major source in today’s society, will be supplied by that national grid, the stable operation of power system is the precondition to ensure the normal production and life, if the electrical system is damaged, leading to people’s production and life has greatly influence, even result in injury or death. Power system causes of many the damage, especially the damaging effects of lightning, the lightning is a natural phenomenon, the buildings and power system of damage is huge; a high voltage and high current is generated during the discharge of lightning, great influence on the insulation of electric power equipment, the most common is the direct lightning flash and lightning induced. To take defensive measures of lightning are mainly lightning rod and lightning wire, for other forms of lightning there are corresponding defense measures, this paper mainly discusses the various lightning defense measures. Substation is an important part of power system, transformer in substation is high cost and the maintenance cost of the large, if once destroyed, it will cause huge economic losses, it can be seen that the lightning protection of substation has become a big problem of our concern.The main work of this paper is:1. The generation of lightning, parameters, hazards, and so do a systematic exposition, determine a variety of lightning protection devices used in substation, including the lightning rod, lightning wire, lightning arrester, etc., their principles, functions, and the scope of protection. The lightning protection equipment of the substation is selected, which is the most suitable for the substation is selected.2. The various corresponding lightning protection device, combined with the actual situation of the substation, design and Realization of the substation lightning protection and lightning protection, determine the different lightning strike in the selection of lightning protection methods and techniques.3. On the import and export, the main transformer of the lightning protection design method and technology.4. The basic knowledge and the grounding of substation grounding, and introduces the method of laying grounding and resistance reduction measures commonly used.5. Grounding resistance design and calculation.