Intentional islanding of distributed generation

Intentional islanding of distributed generation (DG) can support local supplies to critical customers in the event of network failure, thus increasing the system reliability. In such a case, the DG interface control is responsible for maintaining both the voltage and frequency on the islanded part of the network within the permissible operating levels. This paper presents a control strategy to intentionally island the DG during network failure with particular reference to inverter based DGs.