Control of MW-class PV generation to reduce frequency and tie-line power fluctuations in three control area power system

This paper presents a frequency control strategy by grid-connected MW class PV generation. The frequency control is proposed based on a load power estimator from the view point of the frequency fluctuation problem. The proposed method is simulated in three control area power systems by considering large penetration of PV generation and is compared with the conventional battery based PV power fluctuations smoothing method. From numerical simulation results, it is found that the proposed method is satisfactory to provide frequency control and to reduce tie line power fluctuations.