&lt;inline-formula&gt;&lt;tex-math&gt;${\cal L}_1$&lt;/tex-math&gt;&lt;/inline-formula&gt; Adaptive Speed Control of a Small Wind Energy Conversion System for Maximum Power Point Tracking

Zhao, Haoran; Wu, Qiuwei; Rasmussen, Claus; Blanke, Mogens

doi:10.1109/tec.2014.2312978

Cited by 61 publications

(40 citation statements)

References 31 publications

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“…As known, the model of WECS is a strictly proper real system with unmodeled disturbances and parameter uncertainties [24]. With the nonlinear uncertainty due to the movement of the operating points and disturbances, adequate transient performance cannot be guaranteed using a PI controller as discussed in [9]. Therefore, a novel perturb and observe regulator (POR) is designed to achieve a trade-off between the transient performance and the stability of the MPPT control strategy under disturbances.…”

Section: Detailed Analysis Of the Proposed Mppt Strategymentioning

confidence: 99%

“…Although this method is simple in implementation, its performance highly depends on the reliability of anemometers, which is a challenge for such methods. Wind speed estimation methods were proposed to solve such a problem [9]. Using complex estimation algorithms, wind speeds can be captured with respect to the optimal tip speed radio, so that MPPT can be implemented.…”

Section: Introductionmentioning

confidence: 99%

“…However, the performance of the method depends on the anemometer accuracy. Alternatively, an estimated wind speed can be utilized for this method [9].…”

Section: Introductionmentioning

confidence: 99%

“…To overcome this problem, different nonlinear control techniques were accepted, such as fuzzy logic control [4], fractional order control [7] and L 1 adaptive control [9]. Among robust control techniques, the sliding mode control (SM) methods [15,16] made plants more robust, invariant with respect to matched uncertainties, which were computationally simple with respect to other robust control approaches.…”

Section: Introductionmentioning

confidence: 99%

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Development of Novel Robust Regulator for Maximum Wind Energy Extraction Based upon Perturbation and Observation

Tang

Xiahou

2017

Energies

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This paper develops a robust regulator design approach to maximum power point tracking (MPPT) of a variable-speed wind energy conversion system (WECS) under the concept of perturbation and observation. The proposed perturb and observe regulators (PORs) rooted on the sliding mode method employs the optimal power curve (OPC) to realize MPPT operations by continuously adjusting rotor speeds and the duty cycles, which can ensure control performance against system parameter variations. The proposed PORs can detect sudden wind speed changes indirectly through the mechanical power coefficient, which is used to acquire the rotor speed reference by comparing it with the optimal power constant. For the speed and duty cycle regulation, two novel controllers based on the proposed POR, i.e., an MPPT controller and a speed controller, are devised in this research. Moreover, by applying the small-signal analysis on a nonlinear wind turbine system, the convergence of the proposed speed controller is proven for the first time based on the Lyapunov theory, and meanwhile, a single-pole transfer function, to describe the effect of duty cycle variations on rotor speeds, is designed to ensure its stability. The proposed strategy is verified by simulation cases operated in MATLAB/Simulink and experimental results performed from a 0.5-kW wind turbine generator simulator.

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Section: Detailed Analysis Of the Proposed Mppt Strategymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…However, the performance of the method depends on the anemometer accuracy. Alternatively, an estimated wind speed can be utilized for this method [9].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development of Novel Robust Regulator for Maximum Wind Energy Extraction Based upon Perturbation and Observation

Tang

Xiahou

2017

Energies

View full text Add to dashboard Cite

show abstract

“…2. According to the control strategy described in [20], based on the power reference The wind turbine control objectives vary according to different wind conditions [21]. When the wind speed w v is larger than the nominal value, the wind turbine controller aims to limit the captured wind power to the rated power ( …”

Section: Operation Areas Of a Power Controlled Windmentioning

confidence: 99%