A repetitive predictive control for grid-connected inverter current control scheme is presented in this paper under voltage harmonic distortion in the stationary reference frame. Predictive control is an approach that uses a receding horizon to achieve the optimal track for the reference. In this approach, the repetitive controller behavior is added to the predictive control to increase its performance under distorted voltage conditions. In addition, to apply the controller in the generation system, controller is designed from the perspectives of the power system. The controller is designed considering the state-space model in the stationary reference frame. The controller performance was verified using a laboratory experimental setup under distorted grid voltage condition. Experimental results confirm that the proposed controller can effectively suppress harmonics under both normal operation and distorted grid voltage conditions, and also satisfy the requirements stipulated in IEEE Std.

The monitoring and control of renewable energy sources are extremely important to guarantee the operability of the system and the quality of the energy generated. Communication technologies play an important role in the success of these systems and, among them, power-line communication (PLC) has shown itself to be a very promising and economically viable solution, as it uses the existing power infrastructure to transmit the monitoring and control information. In this context, this paper proposes a communication system based on the G3-PLC standard associated with a median filter (MDF) to improve the robustness of the control operation of a wind power generation system (WPGS) composed of a doubly fed induction generator (DFIG) and a predictive controller. The MDF is employed to attenuate impulsive noise and distortions, caused by the degrading effects of the PLC channel, being possible to recover corrupted control information without the need to retransmit data packets.The complete system, that is, WPGS, G3-PLC, and MDF, was modeled in a computational environment and analyzed over a realistic PLC channel model. Simulation results showed that the system is capable of operating with good quality, reducing latency, and enabling real-time communication even under severe channel conditions.