A Novel Hybrid Islanding Detection Method to Improve the Performance of PV Grid Connected System

The continuous operation of renewable energy systems can be achieved in two different modes: grid-connected and autonomous. In the former, the system can be operated in a grid-connected manner, while in the latter, it can be operated in a micro grid or island-based mode. When a distributed generator continues to operate even though the external power supply is no longer available, it is referred to as islanding. This condition can be dangerous for utility grid as it can prevent them from properly connecting devices. Hence this paper proposes a hybrid islanding detection method that combines the passive and active methods. The use of distributed generation units like PV generation can cause problems in the detection of islanding. Also the number of distributed generation units in the distribution system can affect the accuracy of the detection of islanding. The proposed method is implemented on a test case of PV system connected to 415 Volts, 50 Hertz Utility grid. Comparing the effectiveness of the suggested method to passive and active islanding detection techniques. The suggested approach reduces the detection time.