Abstract: A novel voltage regulation and maximum power point tracking（MPPT）control for DC microgrid

composed of PV panel，battery，constant resistance and constant power loads was proposed. A dynamic model of the DC microgrid system described by a multi-input and multi-output nonlinear system with non-affine inputs was

derived. Based on this nonlinear dynamic model，a local state feedback controller was designed used output regulation theory，which can regulate voltages to prescribe set points and maximize PV power output. The global set point regulation of non-affine systems was also studied by using passive system theory and Lyapunov stability theory. The effectiveness of the proposed control schemes was investigated using simulations when changes in both illumination and load.

      Key words: DC microgrid；voltage regulation；nonlinear output regulation；passivity-based controller design