Abstract:
Due to the sensitivity of the parameters of grid connected inverters and their susceptibility to changes in the power grid environment, the stability margin is relatively low. To solve the above problems, a stability control method for grid connected inverters based on virtual synchronous generators is proposed. Build a grid connected inverter model to comprehensively simulate the working process of the inverter. Introducing virtual synchronous generator technology to enable inverters to accurately replicate the behavior of traditional synchronous generators. Develop stability control strategies, achieve reasonable allocation of inverter output power through active droop control and adaptive virtual impedance control, and improve the stability of grid connected inverters. The experimental results show that the research method can significantly improve the stability margin of the system, ensuring that the grid connected inverter maintains excellent stability performance in the face of complex grid environments and disturbances.