Wind energy is one of the fastest-growing renewable energy sources, playing a significant role in modern power systems. This paper presents a comprehensive investigation of a grid-connected Doubly Fed Induction Generator (DFIG)-based hybrid wind-photovoltaic (PV) energy system, including system configuration, power converters, and control strategies. An adaptive droop control strategy is implemented in the grid-side converter (GSC) to achieve effective frequency regulation and enhance microgrid stability under varying operating conditions. The proposed system also incorporates Maximum Power Point Tracking (MPPT) and DC-link voltage regulation to ensure efficient energy extraction and stable operation. A modified PV-DFIG configuration is employed, where PV power is injected into the grid through both rotor-side and grid-side converters, eliminating the need for an additional PV converter and improving system efficiency. The coordinated control approach enables simultaneous regulation of DC-link voltage, system frequency, and power flow. The system is modeled and simulated in MATLAB/Simulink using dynamic equations in multiple reference frames. Simulation results demonstrate improved voltage, current, frequency response, and power characteristics, validating the effectiveness of the proposed control strategy for enhanced stability and performance of hybrid renewable energy systems.
PV systems, Maximum Power Point Tracking (MPPT) Techniques, Hybrid Energy, inverter, Renewable Energy, Battery, Wind System, Boost converter, PID controller.
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