Apply Rough Set to the Study of Major Influence Factor in Gas Breakdown

In power system filed, to study the characteristics of the gas breakdown is essential and of importance in designing the protection of high voltage system as well as to the power system reliability. Hence, in this paper, the major purpose is to propose a refined mathematical approach based on rough set methods to find the priority of influence factor in gas breakdown. And also created rough set toolbox based on Matlab, which to help the complex calculation. As the result, we not only can get the rank of influence factor in gas breakdown, but also provides a new idea for extension the applications of rough set.