Analysis of AC Section Power Fluctuation in West-to-East Electricity Transmission Project and Related Suggestion

The statistics and analysis on the data over the years of the power flow fluctuation and its margin in the main AC sections of West-to-East power transmission lines in China Southern Power Grid(CSG) are carried out.The results show that there is an ascendant trend in the power flow fluctuation;and the fluctuation margin needs dynanic regulation according to the development of CSG and the scale of West-to-East power transmission;and it is helpful for decreasing the power flow fluctuation of AC connection lines to further optimize the frequency quality of CSG so to decrease the amplitude of frequency fluctuation.The update reserved fluctuaton space is necessary and reasonable,but needs further study so to regulate its calculation and management.