Study on selection theory of Shanghai 110kV power grid connection mode and its application

With the continuous development of Shanghai 110kV power grid, planners raise higher and higher demands to selecting suitable connection mode for different regions. From the characteristics of different regions in Shanghai, this paper made theoretical technical and economic study on connection modes corresponding to different 110kV power transformer capacity through establishing a reasonable mathematical model,and taking use of fuzzy quantification method of interval numbers based on trapezoidal membership function. With the method of unifying and quantifying the indicators of various regions characteristics and the grid mode characteristics, then calculating the feature matching degree, this paper gives optimal 110kV connection mode for each various region. The example of Lingang heavy equipment base in Pudong New District given in the paper shows that the given selection theory has strong practicability and accuracy.