Terminal Synergetic Control for Direct Active and Reactive Powers in Asynchronous Generator-Based Dual-Rotor Wind Power Systems

Abstract

A terminal synergetic control (TSC) is designed in this work for a rotor side converter (RSC) of asynchronous generator (ASG)-based dual-rotor wind power (DRWP) systems. The design is based on a novel sliding manifold and aims at improving the ASG performance while minimizing active and reactive power undulations. The method performance and its effectiveness were studied under harmonic distortion (THD) of current, parameter variations and power undulations. Simulation results, carried out using Matlab software, confirmed the system’s robustness against parameter variations and its effectiveness in power undulations. The performance of the designed technique was further compared to that of integral-proportional (PI) controllers in terms of parameter variations, power undulations and THD value of current. While both controllers were able to reduce the effects of power undulations and protect the rotor circuit against over-currents, the proposed TSC was shown to be more effective than the classical PI controller in tracking power and minimizing the undulations effect.

Improved Rotor Flux and Torque Control Based on the Third-Order Sliding Mode Scheme Applied to the Asynchronous Generator for the Single-Rotor Wind Turbine

“…This designed strategy was more robust compared to the traditional DPC strategy and other strategies such as the traditional DFTC and FOC control. A new FOC method was proposed in [22] to minimize the ripples of active power, current, rotor flux, and electromagnetic torque of the induction generator. This designed FOC strategy based on a hysteresis rotor current controller and experimental results showed the performance of the designed strategy.…”

“…In this DFTC control strategy, the rotor flux and torque are regulated by two proposed TOSMC regulators, while the SVM technique replaces the traditional switching table. The principle as well as the advantages and disadvantages of the DFTC-TOSMC method have been comparatively analyzed with other advanced control strategies proposed in the literature [10,[20][21][22][23][24][25][26][27][28][29]. The main contributions of the proposed designed control scheme are to minimize the total harmonic distortion (THD) of current for an AG-based SRWP system, increases the robustness and stability of the controlled system, provides methodical and less-complicated techniques based on a novel SOSMC method to adjust the rotor voltage of DFIG, and reduced ripples of both rotor flux and electromagnetic torque.…”

Amelioration Effectiveness of Torque and Rotor Flux Control Applied to the Asynchronous Generator for Dual-rotor Wind Turbine using Neural Third-order Sliding Mode Approaches

“…The power coefficient CP equation is approximated using a non-linear function according to following expression [10].…”

“…As is known, there are several ways to control electrical machines (generators), such as direct torque control (DTC) [6], filed-oriented control (FOC) [7], direct power control (DPC) [8], backstepping control [9], synergetic control [10], nonlinear control [11][12][13], etc. However, the direct torque control strategy is the most prevalent and widely used method for controlling electrical machines such as induction motor and synchronous motor, and this is because of the advantages and characteristics that it has compared to other methods.…”

Third-Order Sliding Mode Applied to the Direct Field-Oriented Control of the Asynchronous Generator for Variable-Speed Contra-Rotating Wind Turbine Generation Systems

“…This designed strategy is a simple nonlinear technique that can reduce the total harmonic distortion (THD) of current compared to that of the traditional strategy. To obtain lower current ripples and high-quality energy efficiency, a new nonlinear strategy is designed in [40]. This designed new strategy is simple and gives very excellent results compared with that of the PI controller.…”