An anti-islanding protection based on RoCoF compliant with ENTSO-E and IEC 62116
DOI:
https://doi.org/10.24084/repqj20.307Keywords:
Anti-islanding protection methods, Rate of Change of Frequency (RoCoF), microgrids, power qualityAbstract
In case of unintentional islanding, distributed generation units must be able to detect it and disconnect from the grid in less than 2 seconds. In this work, a Rate of Change of Frequency (RoCoF) method has been developed for islanding detection. Since these algorithms are conditioned by the requirements of grid codes, ENTSO-E network code and IEC 62116 have been taken into account. The RoCoF anti-islanding algorithm has been developed in MATLAB-Simulink and implemented through rapid prototyping techniques in an FPGA ALTERA Cyclone V. To check the proposed protection algorithm, simulation tests have been carried out. Finally, the RoCoF anti-islanding protection has been validated using FPGA in the loop and experimentally in a real 20 kW inverter.