| Title |
A Seamless and Autonomous Mode Transfer Method of Grid-connected Inverter in Microgrid |
| Authors |
Sung-Youl Park ; Min-Ho Kwon ; Se-Wan Choi |
| DOI |
10.6113/TKPE/2019.24.5.349 |
| Keywords |
Grid-connected inverter system; Grid faults; Islanding mode; Seamless mode transfer; Critical load |
| Abstract |
A grid-connected inverter with critical loads should be able to supply a stable voltage to critical loads at mode change and during clearing time while detecting unintentional islanding. This study proposes a mode transfer method for a grid-connected inverter with critical loads. The proposed method, which integrates the grid-connected and islanded mode control loops into one control block, provides an autonomous and seamless mode transfer from the current control to the voltage control. Therefore, the proposed scheme can supply a stable voltage to critical loads at mode change and during clearing time. Experimental results are provided to validate the proposed method. |