The energy loss of the power grid is one of the key factors affecting the economic\noperation of power systems. How to calculate the electric energy consumption\naccurately will have a great influence on the planning, operation\nand management of the power grid. Currently there is a mountain of theoretical\nmethods to calculate the line loss of the power system. However, these\nmethods have some limitation, such as less considering the volatility of wind\npower resources. This paper presents an improved method to calculate the\nenergy loss of wind power generation, considering the fluctuations of wind\npower generation. First, data are collected to obtain the curve of the typical\ndaily expected output of wind farms for one month. Second, the curve of the\ntypical daily expected output are corrected by the average electricity and the\nshape factor to obtain the curve of the typical daily equivalent output of wind\nfarms for one month. Finally, the power flow is calculated by using typical\ndaily equivalent output curve to describe the energy loss for one month. The\nresults in the 110 kV main network show that the method is feasible.
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