The invention relates to a wind-solar-thermal storagecapacity optimization configuration method in
power grid planning. The method operates by
computer equipment and programs and comprises the following steps: step A, acquiring and preprocessing historical annual
power transmission data, energy output data and
energy storage device data; step B, predicting a future total
power consumption load curve; step C, making an annual maintenance schedule of a thermal power
generating unit, determining a peak regulation space of the unit every day, and fitting a
coal consumption curve of each unit; stepD, carrying out traversal calculation on the capacity of each power supply and
energy storage combination; step E, selecting a group of power supply capacity combinations to perform daily balance calculation and counting
wind power, photoelectricity, thermal power and
energy storage operation data; step F, performing economical efficiency measurement and calculation on the operation data; step G,judging whether all combinations are traversed or not; step H, comparing all capacity combination results, and determining an optimal capacity configuration scheme; and the optimization effect of
system investment and operation economy is achieved.