@article {Laghridat2022, title = {Coordinated control by ADRC strategy for a wind farm based on SCIG considering low voltage ride-through capability}, journal = {Protection and Control of Modern Power Systems}, volume = {7}, number = {1}, year = {2022}, note = {cited By 3}, abstract = {Wind farms are integrated with the power grid system to provide active and reactive power. Because in a wind farm, wind turbines (WTs) are highly coupled to their operating conditions, a central wind farm supervisory unit must take into account these conditions when producing power control references for each WT. The aim of this paper is to manage and control the active and reactive power of wind farms based on squirrel cage induction generators and back-to-back converters. The proportional distribution algorithm is used for distributing wind farm power to individual WTs. In addition, we consider the development of a local power management and control units for WTs. This is in order to extract the maximum available power from the wind, and to provide the active and reactive power predetermined by the transmission system operator, or to satisfy the grid code requirements considering Low Voltage Ride-through capability. The power dispatch strategy is to be used on all WTs using the distribution algorithm while ensuring the control loops using the proposed Active Disturbance Rejection Control strategy. The results demonstrate that the proposed strategies are efficient and can guarantee the safe integration of wind farms into the grid while respecting grid code requirements and power system stability. {\textcopyright} 2022, The Author(s).}, keywords = {Active and Reactive Power, Asynchronous generators, Co-ordinated control, Distribution algorithms, Disturbance rejection, Electric fault currents, Electric load dispatching, Electric power system control, Electric power system interconnection, Electric power transmission, Electric power transmission networks, Electric utilities, Grid code requirements, Lower Voltage Ride Through, Power control, Reactive power, Ridethrough capability, SCIG, Supervision, System stability, Wind farm, Wind generator systems, Wind power, Wind turbines}, doi = {10.1186/s41601-022-00227-0}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126063800\&doi=10.1186\%2fs41601-022-00227-0\&partnerID=40\&md5=4112037a59e61ad82c8095ef0c01a559}, author = {Laghridat, H. and Essadki, A. and Nasser, T.} } @article {Annoukoubi20221519, title = {Reduction of harmonics emission of a WECS in the electrical grid using multilevel inverters}, journal = {International Journal of Power Electronics and Drive Systems}, volume = {13}, number = {3}, year = {2022}, note = {cited By 0}, pages = {1519-1536}, abstract = {Wind energy conversion system (WECS) is composed of many non-linear power electronic sub systems, which contribute significantly in harmonic emissions that is a threat for the quality of electrical power. Hence, for a better integration of WECS in the electrical grid and in order to satisfy IEEE 519 standards, WECS must inject a quality power with a rate of total harmonics distortion (THD) that is less than 5\%. Multilevel Inverters are an emerging solution for having a perfect sinusoidal output voltage with minimum harmonic content and lower switching losses than the two-level inverter so that only a smaller filter size is required. Thus, in this paper we are presenting a significantly improved results of the reduction of the grid injected current THD using three types of inverters (two-levels, three-levels NPC, and five-levels H-bridge cascade) for a WECS and comparing the THD performances of using each of the studied inverter. All results of THD are verified by a Fast Fourier transform simulation using MATLAB/Simulink. {\textcopyright} 2022, Institute of Advanced Engineering and Science. All rights reserved.}, doi = {10.11591/ijpeds.v13.i3.pp1519-1536}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85134994487\&doi=10.11591\%2fijpeds.v13.i3.pp1519-1536\&partnerID=40\&md5=3b1a02b6e4009b23736b72506b19cdaa}, author = {Annoukoubi, M. and Essadki, A. and Laghridat, H. and Nasser, T.} } @article {Laghridat2020, title = {A Novel Adaptive Active Disturbance Rejection Control Strategy to Improve the Stability and Robustness for a Wind Turbine Using a Doubly Fed Induction Generator}, journal = {Journal of Electrical and Computer Engineering}, volume = {2020}, year = {2020}, note = {cited By 8}, abstract = {A novel and robust active disturbance rejection control (ADRC) strategy for variable speed wind turbine systems using a doubly fed induction generator (DFIG) is presented in this paper. The DFIG is directly connected to the main utility grid by stator, and its rotor is connected through a back-to-back three phase power converter (AC/DC/AC). Due to the acoustic nature of wind and to ensure capturing maximum energy, a control strategy to extract the available maximum power from the wind turbine by using a maximum power point tracking (MPPT) algorithm is presented. Moreover, a pitch actuator system is used to control the blades{\textquoteright} pitch angle of the wind turbine in order to not exceed the wind turbine rated power value in case of strong wind speeds. Furthermore, the rotor-side converter is used to control the active and reactive powers generated by the DFIG. However, the grid-side converter is used to control the currents injected into the utility grid as well as to regulate the DC-link voltage. This paper aims to study and develop two control strategies for wind turbine system control: Classical control by proportional integral (PI) and the proposed linear active disturbance rejection control (LADRC). The main purpose here is to compare and evaluate the dynamical performances and sensitivity of these controllers to the DFIG parameter variation. Therefore, a series of simulations were carried out in the MATLAB/Simulink environment, and the obtained results have shown the effectiveness of the proposed strategy in terms of efficiency, rapidity, and robustness to internal and external disturbances. {\textcopyright} 2020 Hammadi Laghridat et al.}, keywords = {AC-AC power converters, Active disturbance rejection controls, Asynchronous generators, Disturbance rejection, Doubly fed induction generator (DFIG), Doubly fed induction generators, Electric fault currents, Electric machine control, Linear active disturbance rejection controls, MATLAB, MATLAB/Simulink environment, Maximum power point trackers, Maximum Power Point Tracking, Robustness (control systems), Sensitivity analysis, Three-phase power converter, Two term control systems, Variable speed wind turbines, Wind turbines}, doi = {10.1155/2020/9847628}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85083628356\&doi=10.1155\%2f2020\%2f9847628\&partnerID=40\&md5=b2314c4d19e3bac9f4e6e82dcf54f954}, author = {Laghridat, H. and Essadki, A. and Annoukoubi, M. and Nasser, T.} } @article {Laghridat2019, title = {Comparative Analysis between PI and Linear-ADRC Control of a Grid Connected Variable Speed Wind Energy Conversion System Based on a Squirrel Cage Induction Generator}, journal = {Mathematical Problems in Engineering}, volume = {2019}, year = {2019}, note = {cited By 0}, doi = {10.1155/2019/8527183}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85064383115\&doi=10.1155\%2f2019\%2f8527183\&partnerID=40\&md5=539a897526387f7ec2998bf1b25e898b}, author = {Laghridat, H. and Essadki, A. and Nasser, T.} }