At present, photovoltaic power stations generally do not have primary frequency modulation function, and the existing power control response is slow and inaccurate, which can not meet the fast and high-precision requirements of the fast frequency response specifications for the new energy plants released by the Northwest Power Grid of SGCC, so it urgently needs to be optimized and upgraded. In the view of the shortcomings of the low accuracy of traditional average power allocation algorithm and the slow power execution response of conventional MPPT algorithm for inverters, this paper proposes a reference inverter based proportional allocation algorithm on the station side, and also gives a leaping MPPT algorithm based on the reference inverters’ state on the final inverter side. Finally, the analysis of response deviation and the comparison of overall scheme performance, the power allocation simulation test and the on-site inverter power response tests are used to verify the effectiveness and practicability of relevant technologies when implementing the fast frequency response function to PV power station. This work is supported by National Key Research and Development Program of China (No. 2017YFB0903305).