A combination of 3-phase and d-q techniques for controlling the islanded microgrid system: New schemes

The control of microgrid system with renewable energy resources is one of the serious challenges in distributed generation (DG) networks for all intents and purposes. The aim of this paper is to establish feasible control schemes with high reliability in microgrid system. These controllers must be able to cover all probable transient states with various uncertainties in island mode. The controlling systems of this paper are designed based on the conventional 3-phase system with using the ability of d-q transformations. As this reference frame has a supplement role for 3-phase system in order to measure precisely and control the system frequency and voltages. On the other hand the number of state variables is decreased when the d-q technique is applied. The effectiveness of proposed methods either is compared with previous studies. The obtained results from MATLAB prove the appropriate performance of implemented control schemes for all simulated transient states.