| Title |
Grid Connected Inverter of ESS for Seamless mode Transition |
| Authors |
Chang-Pyo Hong ; Hag-Wone Kim ; Kwan-Yuhl Cho |
| DOI |
10.6113/TKPE/2016.21.4.364 |
| Keywords |
Single phase PWM inverter; Stand alone mode; Controller; Nonlinear load; Feedforward |
| Abstract |
In this paper, a voltage controller for the seamless transition of a grid-connected inverter for ESS is proposed. The single-phase inverter is operated as a current controller when the grid is connected and as a voltage controller in the stand-alone mode when the grid is disconnected. Generally, in the case of grid recovery, the overcurrent may flow into the system because of the mismatch phase between the inverter output and grid voltages. The proposed controller resolves the overcurrent problem through phase delay problems with initial value feed-forward control of the integrator when the grid voltage is restored. The effects of the control method are simulated through PSIM, and the usefulness of the control method is verified through experiments. |