scholarly journals Robust power control methods for wind turbines using DFIG-generator

2019 ◽  
Vol 10 (4) ◽  
pp. 2101 ◽  
Author(s):  
Imane El Karaoui ◽  
Mohammed Maaroufi ◽  
Badre Bossoufi
Keyword(s):  
Wind Energy ◽  
Power Control ◽  
Sliding Mode ◽  
Control Strategies ◽  
Energy System ◽  
Electrical Systems ◽  
Point Tracking ◽  
Asynchronous Generator ◽  
Power Point

<span>The purpose of this work is to present the advantages of the power control (active and reactive) of a wind energy system in order to improve the quality of the energy produced to the grid by presenting two control strategies applied to the conversion system of wind energy equipped with an asynchronous generator with dual power supply. Both techniques are studied and developed and consist of a field control (FOC) and a sliding mode control. They find their strongest justifications for the problem of using a nonlinear control law that is robust to the uncertainties of the model. The goal is to apply these two commands to independently control the active and reactive powers generated by the decoupled asynchronous machine by flow orientation. Thus, a study of these commands will be detailed and validated in the Matlab / Simulink environment with the simultaneous use of the "Pitch Control" and "Maximum Power Point Tracking (MPPT)" techniques. The results of numerical simulations obtained show the increasing interest of the two controls in the electrical systems. They also attest that the quality of the active and reactive powers and voltages of the wind system is  considerably improved.</span>

Altitude and Crosswind Motion Control for Optimal Power-Point Tracking in Tethered Wind Energy Systems With Airborne Power Generation

2013 ◽  
Author(s):  
Chris Vermillion
Keyword(s):  
Wind Speed ◽  
Wind Energy ◽  
Motion Control ◽  
Energy Systems ◽  
Energy System ◽  
Control Laws ◽  
Point Tracking ◽  
Optimal Power ◽  
Power Point ◽  
Wind Energy Systems

This paper presents a control strategy that combines altitude and crosswind motion control for tethered wind energy systems with airborne turbines and generators. The proposed algorithm adjusts altitude and induces an appropriate level of crosswind motion to present the system with an apparent wind speed that most closely meets, but does not exceed, the rated wind speed of the on-board turbine(s), thereby tracking the turbine’s optimal power point. The adjustment of both altitude and motion control, along with the reduction in crosswind motion and altitude when the rated wind speed is exceeded, differentiates the proposed control architecture from other strategies proposed in the literature. Initial control laws and simulation results are presented for the Altaeros lighter-than-air wind energy system.

scholarly journals Performance improvement of the variable speed wind turbine driving a DFIG using nonlinear control strategies

2021 ◽  
Vol 12 (4) ◽  
pp. 2470
Author(s):  
Chojaa Hamid ◽  
A. Derouich ◽  
T. Hallabi ◽  
O. Zamzoum ◽  
M. Taoussi ◽  
...  
Keyword(s):  
Sliding Mode ◽  
Control Strategies ◽  
Dynamic Performance ◽  
Harmonic Distortion ◽  
Maximum Power ◽  
Control Approach ◽  
Pi Regulator ◽  
Point Tracking ◽  
Power Point ◽  
Doubly Fed

In this research paper, a nonlinear Backstepping controller has been proposed in order to improve the dynamic performance of a doubly fed induction generator (DFIG) based Wind Energy conversion System, connected to the grid through a back-to-back converter. Firstly, an overall modeling of proposed system has been presented. Thereafter, three control techniques namely backstepping (BSC), sliding mode (SMC) and field-oriented control (FOC) using a conventional PI regulator have been designed in order to control the stator active and reactive powers of the DFIG. In addition, the maximum power point tracking (MPPT) strategy has been investigated in this work with three mechanical speed controllers: BSC, SMC and PI controller with the aim of making a synthesis and a comparison between their performances to determine which of those three techniques is more efficient to extract the maximum power. Finally, a thorough comparison between the adopted techniques for the DFIG control has been established in terms of response time, rise time, total harmonic distortion THD (%) of the stator current, static errors and robustness. The effectiveness and robustness of each control approach has been implemented and tested under MATLAB/Simulink environment by using a 1.5 MW wind system model.

scholarly journals Design of Hybrid Solar Wind Energy System in a Microgrid with MPPT Techiques

2018 ◽  
Vol 8 (2) ◽  
pp. 730
Author(s):  
D. Chinnakullay Reddy ◽  
S. Satyanarayana ◽  
V. Ganesh
Keyword(s):  
Wind Energy ◽  
Pulse Width Modulation ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Pv System ◽  
Dc Microgrid ◽  
Point Tracking ◽  
Power Point ◽  
Grid Side ◽  
Grid Side Converter

<p>DC Microgrid is one feasible and effective solution to integrate renewable energy sources as well as to supply electricity. This paper proposes a DC microgrid with enhanced Maximum Power Point Tracking (MPPT) techniques for wind and solar energy systems. In this paper, the PV system power generation is enhanced by introducing a two-model MPPT technique that combines incremental conductance and constant voltage MPPT algorithms. Also, for the Wind Energy Conversion System (WECS) with pitch angle controlling technique, an Optimal Power Control MPPT technique is added. The Space Vector Pulse Width Modulation technique is introduced on grid side converter to improve the supply to the grid. The performance of proposed system is analyzed and the efficiency obtained with these methods is enhanced as compared with the previous methods.</p>

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