A Proposed High-Performance Wind-Driven Doubly-Fed Induction Generator Based on Super-Twisting Sliding Mode Control for Rural Areas Applications

This paper proposes a high-performance of the doubly-fed induction generator (DFIG) propelled with a wind turbine (WT) for rural areas. The proposed control methods aim at regulating the terminal load voltage and frequency besides extracting the maximum wind-power under different circumstances such as variable-speed wind turbine and load variations. The proposed structure comprises DFIG, WT, rotor-side converter, buck-boost converter, load side converter, LC filter, and battery energy storage. The maximum power extracted from wind speed and the compensated load voltage is achieved through the control structure for the rotor side converter (RSC). Moreover, the super twisting sliding mode control is used for the RSC instead of the PI controller. Meanwhile, the DC-bus voltage is maintained constant by the controlling of the buck-boost converter. On the other hand, the load side controller is based on keeping the q-axis voltage at zero and assisting on the power balance. This paper presents comprehensive simulation findings and systematic analysis for a 7.5 kW DFIG driven by the wind turbine.