| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 399755 | International Journal of Electrical Power & Energy Systems | 2012 | 9 Pages |
A novel islanding detection method for an inverter-based distribution generation power system is proposed in this paper. The inverter-based distribution generation power system includes a dc power source and a grid-connected DC/AC inverter. The grid-connected DC/AC inverter acts as a virtual capacitor as the frequency is slightly lower than the fundamental frequency of utility voltage. Since only the inverter-based distribution generation power system supplies power to the load as the utility power interruption occurs, the virtual capacitor operation of the inverter-based distribution generation power system will result in the change of load voltage in amplitude or frequency. Hence, the proposed method can immediately detect the islanding operation.
► A virtual capacitor based islanding detection method is proposed. ► The inverter acts as a virtual capacitor when the utility is interrupted. ► The proposed detection method can detect the islanding operation effectively.
