Research on Coordinated Control Strategy Among Inverters Based on Droop Control

With the development of the power grid, a large number of large photovoltaic power stations will be connected to the power grid, and the proportion of photovoltaic power generation in the total power grid will gradually increase, which will lead to the reduction of power system inertia, insufficient frequency regulation capacity and other problems. In case of system emergency, the frequency of the power grid will fluctuate greatly, and it is difficult to ensure the frequency stability. In this paper, the research on active power output of inverter based on droop control is carried out. First, the relevant model of photovoltaic inverter is established, and a two zone four machine system is built based on the platform of PowerFactory. The proposed method is verified and its effectiveness is proved.