Equivalent power for a wind power system

Șorândaru, Ciprian; Muşuroi, Sorin; Ancuti, Mihaela-Codruta; Erdodi, Gheza-Mihai; Petrescu, Doru-Ionut

doi:10.1109/saci.2016.7507374

Cited by 8 publications

(4 citation statements)

References 8 publications

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“…Determining the value of the equivalent speed in the graph of the function V(t) obtained through measurements of the wind speed over time is complicated because VECH depends on the evolution of the wind speed but also on the VUM, ω, at which the wind turbine operates. [5], [7], [8].…”

Section: Resultsmentioning

confidence: 99%

“…Result: (8) The total energy gained in this time interval is: (9) The sum of the energies: the kinetic energy ∆WCINETIC corresponding to the two mechanical angular velocities ω(0) and ωOPTIM(33) and the wind energy that is captured by the wind turbine in the time interval ∆t=33 s implies the value of the energy required to be taken over by the generator in point F-MPP and has the value: (10)…”

Section: Resultsmentioning

confidence: 99%

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Methods to improve wind turbine control

Dumitrescu

Dordescu²,

Drăgan³

2023

Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies XI

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Tracking the maximum power point (MPP) represents the essence of the variable speed control of wind turbines since it determines their efficiency. The MPP is achieved by always adapting the wind turbine’s speed to the wind speed. This paper presents a study of methods to improve the control of wind turbines. One of these methods is the minimization of the time interval required for the wind turbine to achieve maximum power. Minimizing the time it takes to bring the speed/VUM, ω, from GE to the optimum value, ωOPTIM, is made at the maximum value for GE current. The study is based on the wind speed measurements collected from a wind farm located in Dobrogea, Romania. In this paper we have studied the methods of optimizing the control of wind turbines with an emphasis on minimizing the time required to bring wind turbines in the optimal area, from an energy point of view knowing the wind speed and, based on this, the optimal mechanical angular velocity, charges the electric generator, (at the rated current value), if 𝜔⋗ 〖ω〗 _OPTIM, or discharges, (zero power), if 𝜔⋖ 〖ω〗 _OPTIM. This ensures maximum wind energy capture. The study is based on the wind speed measurements collected from a wind farm located in Dobrogea, Romania.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Methods to improve wind turbine control

Dumitrescu

Dordescu²,

Drăgan³

2023

Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies XI

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“…The simulations that presented in the paper are based on the classical mathematical models of WT and PMSG [16][17][18][19].…”

Section: Mathematical Modelsmentioning

confidence: 99%

Analysis of the Wind System Operation in the Optimal Energetic Area at Variable Wind Speed over Time

et al. 2019

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Due to high mechanical inertia and rapid variations in wind speed over time, at variable wind speeds, the problem of operation in the optimal energetic area becomes complex and in due time it is not always solvable. No work has been found that analyzes the energy-optimal operation of a wind system operating at variable wind speeds over time and that considers the variation of the wind speed over time. In this paper, we take into account the evolution of wind speed over time and its measurement with a low-power turbine, which operates with no load at the mechanical angular velocity ωMAX. The optimal velocity is calculated. The energy that is captured by the wind turbine significantly depends on the mechanical angular velocity. In order to perform a function in the maximum power point (MPP) power point area, the load on the electric generator is changed, and the optimum mechanical velocity is estimated, ωOPTIM, knowing that the ratio ωOPTIM/ωMAX does not depend on the time variation of the wind speed.

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“…As is highlighted in [2], from the energy point of view, the operation of the wind turbines within the optimal area was treated mainly for constant wind speeds over time. In reality, the wind speed is a time-varying function, and in order to operate within the optimal area from the energy point of view, the angular speed of the permanent magnet synchronous generator (PMSG) must follow the wind speed variation in time, because the PMSG's optimal angular speed is directly proportional to the wind speed value, as was shown in [3].…”

Section: Introductionmentioning

confidence: 99%

Wind Turbines Optimal Operation at Time Variable Wind Speeds

et al. 2020

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The wind turbine’s operation is affected by the wind speed variations, which cannot be followed by the wind turbine due to the large moment of the power plant’s inertia. The method proposed in this paper belongs to the wind turbine power curves (WTPC) approach, which expresses the power curve of the permanent magnet synchronous generator (PMSG) by a set of mathematical equations. The WTPC research papers published before now have not taken into consideration the total power plant inertia at time-variable wind speeds, when the wind turbine’s optimal operation is very difficult to be reached, and its efficiency is thus threatened. The study is based on a wind turbine having a large moment of total inertia, and demonstrates, through extensive simulation results, that the optimal values of the PMSG’s power can be determined based on the kinetic motion equation. This PMSG’s optimal power represents an ideal time-varying curve, and the wind turbine should be controlled so as to closely follow it. For this purpose, proportional integral (PI) and proportional integral derivative (PID) type-based control methods were implemented and analyzed, so that the PMSG’s power oscillations could be reduced, and the PMSG’s angular speed value made comparable to the optimal one, meaning that the wind turbine operates within the optimal operation area, and is efficient. The simulations are actually the numerical solutions obtained by using the Scientific Workplace simulation environment, and they are based on the wind speed measurements collected from a wind farm located in Dobrogea, Romania.

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Equivalent power for a wind power system

Cited by 8 publications

References 8 publications

Methods to improve wind turbine control

Methods to improve wind turbine control

Analysis of the Wind System Operation in the Optimal Energetic Area at Variable Wind Speed over Time

Wind Turbines Optimal Operation at Time Variable Wind Speeds

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