Stability Analysis and Control Strategy for Multi-Machine Parallel System with Grid-forming Inverters
This work studied the power oscillation problem in a grid-forming multi-inverter system controlled by virtual synchronous technology.By establishing a state-space model for the grid-forming multi-inverter system,the dominant mode of power oscillation caused by load disturbance was calculated.The impact of the matching relationship between vir-tual inertia and line impedance on system stability was analyzed,and virtual damping adaptive control and virtual imped-ance adaptive compensation methods were proposed.The results showed that compared to the virtual damping adaptive control method,the virtual impedance adaptive compensation method can ensure optimal dynamic performance of the sys-tem while improving system stability and significantly reducing the risk of power oscillation caused by load disturbances in the grid-forming multi-inverter system.
万方数据
维普
