Inverter Seamless Mode Transfer Strategy Based on H_∞ Robust Control in Micro-Grid

摘要

In order to reduce the impact of current and voltage effectively, when the dual-mode inverter grid-connected/off-grid mode transfer in the micro-grid system. There is a uncontrollable parameter perturbations influence in the transfer process of grid-connected/off-grid. This paper presents micro-grid dual-mode inverter which take H_∞ robust controller in current inner loop, reducing external disturbances and parameter perturbations influence, and enhancing power quality during grid-connected/off-grid mode transfer. Relying on a southern reef stand-alone micro-grid system project, taking simulation and experimental tests, comparative analysis with traditional PI control shows the superiority of the proposed scheme.