article · IEEE Access
This research evaluates a feedback proportional-integral controller designed for multi-rotor wind energy conversion systems. Operating with pulse width modulation, the controller regulates the power of a doubly-fed induction generator through an adapted direct power control strategy. Tested under variable wind speed conditions using simulations and experimental hardware, the approach was benchmarked against conventional direct power control methods and existing control designs. The results confirm that the new feedback scheme significantly outperforms traditional techniques. It delivers marked reductions in energy ripples, overshoot, steady-state error, and response times. In addition, the controller substantially lowers the total harmonic distortion of the currents supplied by the system, ensuring smoother and more stable electrical power generation under fluctuating wind speeds.
Wind power fluctuates as wind speeds change, which can introduce instability, power ripples, and electrical distortion into energy grids. Developing better generator controllers ensures wind turbines produce cleaner, more stable electricity. This improves the reliability of renewable energy systems and helps power networks integrate wind energy without risking disruption or equipment strain.
This control technology applies to multi-rotor wind turbine manufacturers and grid operators seeking to stabilise power output from doubly-fed induction generators. Having been experimentally validated using a Dspace 1104 hardware setup alongside simulations, the technology sits at an applied and tested stage, though the abstract does not indicate full-scale field testing or commercial deployment.
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This new paper describes an experimental investigation of a proportional-integral (PI) controller that uses feedback control to regulate an energy system that uses multi-rotor wind energy systems. Pulse width modulation (PWM) is used by the proposed controller to control the power of the doubly-fed induction generator controlled by direct power control (DPC), which is intended to regulate and control the inverter. The proposed strategy differs from the traditional DPC strategy. The proposed control was studied in the case of variable wind speed, where the MATLAB and Dspace 1104 environment was used to implement this proposed feedback PI (FPI) controller, with a comparison with the proposed control technique and some existing works. The suggested FPI controller outperforms the traditional controller and certain other controllers in terms of lowering energy ripples, overshoot, steady-state error (SSE), response time, and the total harmonic distortion (THD) of supplied system currents, as demonstrated by experimental and simulation results. The THD value of current was reduced by 64.86% and 69.44% in the two proposed tests compared to the traditional DPC technique. Also, the value of ripples and overshoot of active power was reduced compared to the DPC method by 95.42% and 90.86%, respectively, in the case of step wind speeds. Moreover, ripples and SSE of reactive powers compared to the DPC technique were reduced by 37.51% and 84.13%, respectively. These high ratios indicate the high performance of the proposed DPC-FPI technique in enhancing the features of the system in contrast to the conventional DPC technique.
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DOI: 10.1109/access.2024.3351355
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