The microgrid concept provides a quite appealing solution for overcoming the challenges of integrating renewable energy sources and distributed generators into the power grids. Advances in microgrid control have significantly facilitated this issue. Microgrid control refers to the application of control theorems and relevant technologies for stabilizing and enhancing the performance of microgrid operation, following various disturbances in different operating modes. Some of most important microgrid control issues in MGs are active and reactive power sharing, synchronization methods, voltage and frequency regulation services, emergency control, cybersecurity, power control and energy management. This speech in addition to fundamental control requirements, will present a critical review on the current control layers classification based on the “dynamic timescale”, and “power rate”, by addressing the significant shortcomings. Then, the “impact area” and “responsible source” are emphasized to propose an updated hierarchical control structure. The speech will be supplemented with number of illustrative examples.
