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16 results on '"Alnami, Hashim"'

3. Design, implementation, and experimental validation of a new low-cost sensorless wind turbine emulator: Applications for small-scale turbines.

Author

Alnami, Hashim, Ardjoun, Sid Ahmed El Mehdi, and Mahmoud, Mohamed Metwally

Subjects
RENEWABLE energy sources, WIND power, WIND turbines, WIND speed, FOSSIL fuels
Abstract

Research and investigation into renewable energy sources is being sparked by the rapidly rising need for electricity, higher costs of fossil fuels, and increasing worries about the environment. Recent years have seen a tremendous increase in the use of wind energy (WE). In-depth study has been done to effectively produce power from WE. Nevertheless, it is exceedingly challenging and dangerous to set up wind turbines (WTs) for research and teaching uses due to constraints like space and upkeep. Numerous benefits come with a lab-scale WT emulator (WTE), such as freedom from space restrictions, an improved level of control, and independence from existing weather conditions. The design and execution of a low-power, lab-scale WTE are the focus of this study. The investigated experimental configuration is intended to precisely mimic the mechanical behavior of a real WT. Aerodynamics, blades, slow shafts, gearboxes, and controller elements, for example, are modeled in MATLAB/Simulink before they are assembled and implemented on a dSPACE 1104 board. A DC motor running under buck converter control is used to substitute the quick shaft. The WTE's functionality is evaluated in various wind speed conditions. The findings of comparing the WTE's dynamics with those offered by the manufacturer amply show the efficacy of the proposed WTE and its capacity to take the position of an actual WT. This paper will be a useful resource for investigators in helping them select the best WTE approach for their purposes. [ABSTRACT FROM AUTHOR]

Published
2024
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9. An overview of the emerging SARS-CoV-2 variants in the Middle East

Author

Alsyamy, Areej M., primary, Alajmi, Taraheeb K., additional, Alamri, Ibrahim F., additional, Alamri, Basmah F., additional, Mahmoud, Waseem M., additional, Aljohani, Abdulrahman A., additional, Almutairi, Mohammed A., additional, Alshaikh, Ibrahim F., additional, Assiri, Layali I., additional, Alhrthialsharif, Asma A., additional, and Alnami, Hashim Y., additional

Published
2021
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15. The Impacts of Loading Conditions on SMC for PMSG of Wind Conversion System.

Author

Alnami, Hashim and Chengzong Pang

Subjects
ENERGY consumption, WIND power
Abstract

Energy efficiency and output uncertainty are two of the most challenges that Wind Energy Conversion System (WECS) is facing. Controlling the wind generation system variables is complicated due to the variability and unpredictability of the wind resources, especially wind speed and directions. Sliding mode control is one effective technique that has been used to improve wind energy conversion system efficiency and to reach the rated values of the wind generation system. Most of the recent researches focus on the design, performance, and behaver study on sliding mode control from the wind turbine side, which mostly only considering those under normal conditions in power system. However, the disturbance on the load side will have impact on the generation performance as well, which may require control system to react. This paper presents a study of sliding mode control response when considering loads under different conditions. Power system disturbances are considered in this paper, such as faults conditions, in order to analyze the sliding mode control behavers. Case studies based on Matlab/Simulink were used to demonstrate the proposed analysis. [ABSTRACT FROM AUTHOR]

Published
2019

16. The Impacts of Loading Conditions on SMC for PMSG of Wind Conversion System.

Author

Alnami, Hashim and Chengzong Pang

Subjects
ENERGY consumption, WIND energy conversion systems
Abstract

Energy efficiency and output uncertainty are two of the most challenges that Wind Energy Conversion System (WECS) is facing. Controlling the wind generation system variables is complicated due to the variability and unpredictability of the wind resources, especially wind speed and directions. Sliding mode control is one effective technique that has been used to improve wind energy conversion system efficiency and to reach the rated values of the wind generation system. Most of the recent researches focus on the design, performance, and behaver study on sliding mode control from the wind turbine side, which mostly only considering those under normal conditions in power system. However, the disturbance on the load side will have impact on the generation performance as well, which may require control system to react. This paper presents a study of sliding mode control response when considering loads under different conditions. Power system disturbances are considered in this paper, such as faults conditions, in order to analyze the sliding mode control behavers. Case studies based on Matlab/Simulink were used to demonstrate the proposed analysis. [ABSTRACT FROM AUTHOR]

Published
2018

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