Research articleDesign and implementation of a new modified sliding mode controller for grid-connected inverter to controlling the voltage and frequency

- Adaptive sliding mode controller is proposed for island microgrid with two DG units.
- At first this controller is analytically is presented and then is evaluated with simulation and experimental test set.
- The design procedure for the proposed modified sliding mode controller is described in detail.

As the output power of a microgrid with renewable energy sources should be regulated based on the grid conditions, using robust controllers to share and balance the power in order to regulate the voltage and frequency of microgrid is critical. Therefore a proper control system is necessary for updating the reference signals and determining the proportion of each inverter in the microgrid control. This paper proposes a new adaptive method which is robust while the conditions are changing. This controller is based on a modified sliding mode controller which provides adapting conditions in linear and nonlinear loads. The performance of the proposed method is validated by representing the simulation results and experimental lab results.