Battery-Supported GFC Based Microgrid With Integration of DFIG and PV Generation

This article deals with an islanded three-phase four-wire battery-supported system with integration of solar and wind. Voltage and frequency of point of common coupling (PCC) are regulated by a battery-supported converter. On other side, voltage across stator of wind driven doubly fed induction generator (DFIG) is developed by stage-I rotor side converter control. After matching with grid code, the stator connects with PCC. Stage-II control is based on field-oriented control and it is used to activate power loop of controller. Moreover, this control offers required reactive power by DFIG and it also follows reference rotor speed. An improved three phase comb sliding mode control (CSM) regulates dc-link voltage of grid side converter and mitigates power quality issues. Dynamic performances during load variation and change in wind speed are handled by this advanced CSM controller. On other hand, double-stage photovoltaic (PV) power is fed to PCC via a voltage source converter. This VSC is controlled by dq-control, which regulates dc-link voltage of corresponding converter and also improves performance during solar dynamics. These results are displayed through system and controller behavior during wind variation, different insolation, load variation, and stator synchronization. Moreover, developed system is maintaining grid current total harmonic distortion (THD) below 2%.