The invention belongs to the field of power grid operation, and particularly relates to a power frequency technology for improving the new energy accepting capacity of a power grid. In order to solvethe existing problems of difficult new energy consumption and unstable frequency and to better adjust the frequency of a large power grid, a technical scheme as follows is adopted: the change relationship between power and frequency is proposed based on the measured data of a large power grid in a certain region; as a frequency has a frequency space, the relationship between load power and unit regulation power is proposed in view of the problem on whether the new energy consumption capacity can be increased within the frequency space; and data is collected, processed and fitted through a calculation module to obtain an expression, adjustable units are adjusted in real time by AGC to reduce the thermal power generation capacity and consume new energy to the maximum, and thus, the goal of the maximum utilization of clean energy is achieved. Less wind and light energy is curtained. Moreover, the combustion of fossil fuels is reduced, and environmental pollution is reduced. The power frequency technology is of far-reaching significance for energy conservation and environmental protection.