Research On Power Grid Development Planning Of Datong

Urban power grid is an important infrastructure of city, its development scale and technical level must be adapted to regional economic and social development. Although after long-term development, especially after during the period of "11th five-year plan" of construction and retrofit, the power network of Da tong in the space truss structure, power supply capacity, power supply reliability and the operation indicator has got up, but there is still a relatively weak, lacking the ability to supply structure, equipment level is not high. To satisfy the need of rapid economic and social development of Da tong, during the "twelfth five-year" period,the task of power grid renovation and construction in Da tong will be quite difficult. So to formulate reasonable overall planning of power grid in Da tong and the area economic development of Da tong have very important significance.This article first discussed the power grid and electric power demand forecasting method of Da tong. Through to the Da tong economic development and the future electricity demand analysis, obtained the the prediction of regional power, electricity sales amount, and the largest electric charge in Da tong area during2012-2015.At last,this article established the mathematical model of load flow calculation, Enumerates two kind of eastern power grid and four kind of western power grid operation modes, and by checking calculation to the ring opening scheme of two power grids, the most reasonable operation mode of power networks in eastern and western networks in Da tong area is obtained. And suggested that the power network in Da tong according to the joint variation of the second power plant run out.The500-220kV power network ring opening mode of east and west in Da tong can only use the inadequacy of way before introducing from other sites and reliable power supply circuit in Ping Cheng (Da tong east).