Abstract: This paper firstly analyzes the load curves of some curve provinces in south China. In the process of analysis of the power characteristics of Guangdong, the MATLAB software is used to quantitatively analyze the effect of peak-filling and valley-filling in the second stage. And the existing problems are analyzed: the means of Guangdong peak modulation frequency modulation is insufficient and the energy storage unit has a great effect on the frequency modulation and frequency modulation of the system. Through the establishment of the relevant mathematical model, the use of GAMS software with a constrained quadratic control obtained after the power transmission curve. The analysis of the transmission situation in the dry season is carried out, and it is found that the peak-valley difference can be reduced in a considerable range. And then according to the special period of the west to east of the wet season, the data within the program to be amended, the same can be a reasonable optimization of the results.