Design For A35KV Digital Substation

With the development of the national economy and the improvement of people's living standard, the requirements about the power supply's quality are increasing day by day. The government raised a plan about speed up the city nets and rural construction and renovation, stimulating domestic demand growth. Scientific design can improve the ability of power supply and the adaptability of the substation, and can reduce the land that electric power facilities occupied.35kV substations are suitable for the rural power grid construction. Although the cities with huge quantities of power consumes and the cities with economically developed are no longer built new35kV substation, even the old35kV substations are transforming into110kV substation or10kV switching station, the style of35kV/10kV will continue to exist in the vast rural area for a long time.And the digital substation is the one that take the first and secondary system as the digital object. It makes a unified modeling to digital information, and take the use of standardized network communications platform, thus, with information sharing, integrated hardware platform application, software function interpolation access reuse and so on, it realize the monitoring of substation operation, fast protection, intelligent analysis and other basic functions. Besides, it also laid the foundation for the development of smart grid, as well as wide-area control technology. At present, the digital substation has been widely used in substations of110kV and above, the contrast shows35kV substations are less. At the same time, there are a lot of conventional35kV substations are facing the problem of digital transformation. In this paper, according to this phenomenon, I will design a35kV substation firstly, and then I will make digital transformation for this substation, and compare the advantage and disadvantage between digital and traditional substation. I hope my paper can provide some references for the existing35kV traditional substation. Finally, I will use "SketchUp" to design the vision of the future digital substation, which makes an exploration and research for the future development of digital substation.