Distributed Frequency Suppression Method using Inverter for Photovoltaic Power Generation

In this paper, the frequency variation suppression method for dispersed photovoltaic power generation (PV) is proposed. The variation of system frequency can occur due to the shortage of power generator adjustment under the massive installation of PV. In addition, the PV which is not equipped with frequency control results in the system frequency change. To handle this problem, a frequency control method by giving generator constants to distributed PVs is presented. Since, the distributed PVs cannot exchange information such as power generation amount and solar radiation amount etc., only the capacity of distributed PV is used. As a result, the generator constants of each PV can be calculated, and the frequency control can be performed. Study results confirm that the power generation output of PV which changes momentarily can be supplemented by giving the generator constants to distributed PVs.