Abstract:To treat the stochastic wind nature, it is required to attain all available power from the wind energy conversion system (WECS). Therefore, several maximum power point tracking (MPPT) techniques are utilized. Among them, hill-climbing search (HCS) techniques are widely implemented owing to their various features. Regarding current HCS techniques, the rotor speed is mainly perturbed using predefined constants or objective functions, which makes the selection of step sizes a multifaceted task. These limitations … Show more
“…The amount of kinetic energy that the WT is able to extract from the wind is a nonlinear function with respect to WT's bald spinning speed and wind speed. At a given wind speed, there is a specific spinning speed for each WT that, when reached, captures the maximum amount of power from the wind [41]. As a result, the WT needs to operate at optimal spinning speed in relation to the wind speed.…”
Wind power's increasing use and its integration into the utility grid have prompted scholars to focus more on the refinement of wind power harvesting systems, injecting stable power and providing ancillary services to the utility grid. This article introduces a novel hybrid approach termed as sine cosine algorithm and transient search optimization (HSCATSO) optimizer of better exploration and exploitation phases for optimal designing the power electronic converter control schemes (PECCS) of the grid-tied variable speed wind turbine (VSWT) system. The PECCS is simultaneously coordinated with a robust maximum power extraction algorithm (MPEA) to form enhanced control systems for achieving the best wind harnessing, improving the VSWT system performance, and supporting the utility grid stability. In this context, the HSCATSO optimally designs the PECCS parameters based on minimizing the summation of integral squared error (ISE) of multiple error signals in the developed control schemes in coordination with the MPEA. The superiority of the HSCATSO optimizer is validated using twenty benchmark functions and statistically analysed against four well-known optimization algorithms. Meanwhile, the effectiveness of the optimally designed PECCS using the HSCATSO is verified by the extensive simulation analysis in MATLAB/Simulink considering severe grid disturbance and real wind speed data taken from Kudat, Sabah, Malaysia to mimic realistic circumstances. The obtained results have been compared with that realized using the other algorithms-based design PECCS. The simulation outcomes affirmed that the PECCS designed by the HSCATSO and coordinated with MPEA resulted in higher power harvesting and enhanced the grid-tied VSWT system stability better than the competitive control schemes.INDEX TERMS Power electronic converter control, PMSG, MPPT, maximum power extraction, PI controller tuning, wind power, sine cosine algorithm, transient search optimization, WECS, VSWT system.
“…The amount of kinetic energy that the WT is able to extract from the wind is a nonlinear function with respect to WT's bald spinning speed and wind speed. At a given wind speed, there is a specific spinning speed for each WT that, when reached, captures the maximum amount of power from the wind [41]. As a result, the WT needs to operate at optimal spinning speed in relation to the wind speed.…”
Wind power's increasing use and its integration into the utility grid have prompted scholars to focus more on the refinement of wind power harvesting systems, injecting stable power and providing ancillary services to the utility grid. This article introduces a novel hybrid approach termed as sine cosine algorithm and transient search optimization (HSCATSO) optimizer of better exploration and exploitation phases for optimal designing the power electronic converter control schemes (PECCS) of the grid-tied variable speed wind turbine (VSWT) system. The PECCS is simultaneously coordinated with a robust maximum power extraction algorithm (MPEA) to form enhanced control systems for achieving the best wind harnessing, improving the VSWT system performance, and supporting the utility grid stability. In this context, the HSCATSO optimally designs the PECCS parameters based on minimizing the summation of integral squared error (ISE) of multiple error signals in the developed control schemes in coordination with the MPEA. The superiority of the HSCATSO optimizer is validated using twenty benchmark functions and statistically analysed against four well-known optimization algorithms. Meanwhile, the effectiveness of the optimally designed PECCS using the HSCATSO is verified by the extensive simulation analysis in MATLAB/Simulink considering severe grid disturbance and real wind speed data taken from Kudat, Sabah, Malaysia to mimic realistic circumstances. The obtained results have been compared with that realized using the other algorithms-based design PECCS. The simulation outcomes affirmed that the PECCS designed by the HSCATSO and coordinated with MPEA resulted in higher power harvesting and enhanced the grid-tied VSWT system stability better than the competitive control schemes.INDEX TERMS Power electronic converter control, PMSG, MPPT, maximum power extraction, PI controller tuning, wind power, sine cosine algorithm, transient search optimization, WECS, VSWT system.
“…Recently, the witnessed growth of the penetration of renewable energy sources (RESs) to support the global electrical energy demand and eradicate the urgent drawbacks of fossil fuels, becomes a promising research trend to develop new industrial technologies to cope with their various obstacles and challenges [1], [2]. Among the available sorts of RESs, Solar Photovoltaic (PV) systems are widely utilized according to their various features such as being environmentally friendly and long-lasting [3]- [5].…”
His research interests include digital signal processing for communications, multimedia, image, and video coding, low-power wireless communications, one-bit ADC multiple-input multiple-output, underwater communication, index and spatial modulation, Li-Fi technology, and visible light communication. He is a Technical Committee Member of many international conferences and a Reviewer of many international conferences, journals, and transactions. Moreover, he was the General Co-Chair of the IEEE ITCE, in 2018. Mohammed Farrag (Member, IEEE) received the B.Sc. degree in electrical engineering and the M.Sc. degree in communication and electronics from Assiut University, Egypt, in 2001 and 2008, respectively, and the Ph.D. degree in communication and electronics engineering from the Egypt-Japan University of Science and Technology (E-JUST), in 2013.
“…In addition, in order to meet the requirement of providing a certain voltage support during a fault [12]. The converter of the DFIG cannot simply be blocked using crowbar during the fault period, and the rotor excitation needs to be adjusted through the LVRT control strategy to output reactive current [13]. In this case, the output short-circuit current of the DFIG is affected by the converter control characteristics [14].…”
The transient characteristics of wind farms in groups are quite different; in addition, there is a strong coupling between the wind farms and the grid, and these factors make the fault analysis of the grid with wind farm groups complicated. In order to solve this problem, a mathematical model of the converter is established based on the input-output external characteristics of the converter, and a transient model of a doubly fed wind turbine (DFIG) is presented considering the influence of the low-voltage ride-through control (LVRT) of the converter, and the effect mechanism of the LVRT strategy on the short-circuit current is analyzed. Finally, a short-circuit current calculation model of a doubly fed wind turbine with low-voltage crossing control is established. The interaction mechanism between wind farms during the fault is analyzed, and a short-circuit current calculation method of doubly fed wind farm groups is proposed. RTDS is used to verify the accuracy of the proposed short-circuit current calculation method for doubly fed field groups. On this basis, a method of power grid fault analysis after doubly fed field group access is discussed and analyzed.
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