Secondary voltage control for microgrids based on fixed-time distributed cooperative control of multi-agent systems

In this paper, fixed-time distributed cooperative control of multi-agent systems is presented for secondary voltage control of microgrids. Fixed-time observer is constructed to estimate the synchronization error and fast fixed-time controller is designed to achieve fixed-time terminal voltage synchronization of each distributed generator in microgrids. The presented control scheme is fully distributed and requires sparse communication links. Therefore, it is more reliable and costs less than centralized control. Furthermore, the presented control scheme can guarantee fixed-time convergence of the synchronization error, which can reduce the loss caused by voltage instability and guarantee excellent power supply quality after restoration. Simulation results validate the effectiveness of the proposed control scheme.