Abstract:

Based on transmission line project completed and put into operation in a certain area in 2005 to 2014, the factor analysis method is used to analyze the factors influencing the cost variation and the factors affecting the cost of each factor in the paper. In the end, the potential factors and trends of the change of the cost of transmission line is revealed by the difference between the cost of unit length and the length of the unit capacity. Through the analysis, it is concluded that the engineering quantity is the main factor of the cost of the unit length, the construction cost is a fast rising trend, the wide application of the large section conductor.

Key words: Transmission line, cost changes, influencing factors, factor analysis, regression analysis