Abstract
Power system is composed of a variety of different voltage power lines to power plants, power distribution and power users by linking include power generation, transmission, substation, distribution and consumption of a unified whole. Make good use of energy is of great significance for the community. One substation is an integral part of the power system, a good change can improve the power grid and power distribution system operation safety, economy and stability
. The design of the content is about a 35kV substation power plant system design. Firstly, according to the original design data, the total load of the whole plant for statistical calculation, select the main transformer capacity and numbers, and two main electrical connection and a preliminary sketch to determine the power supply system. Subsequently, this has combined with knowledge of the system diagram of the short circuit calculation, high-voltage equipment selection and calibration, low-voltage switchgear selection and validation, to determine the high and low voltage circuit terminals. Finally is the substation protection setting calculation. After the completion of all design, I finally got a factory 35kV substation system diagram of power supply. Key words substation ;load statistics ;high and low voltage equipment;protection setting