The determination of the maximum energetic zones for a wind system, operating at variable wind speeds

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

doi:10.1109/icstcc.2014.6982425

Cited by 4 publications

(5 citation statements)

References 13 publications

(15 reference statements)

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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%

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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%

“…The equivalent wind speed is calculated using the relationship: (4) (5) Based on this value, the maximum power of the TV turbine can be obtained as follows: (6) Considering the F -MPP curve in figure 3, Figure 3 Movement of the operating point towards the maximum power point the average power in the interval ∆t, is:…”

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%

“…We will use a classical turbine model [19], which allows for the estimation of the reference angular velocity ref. The mathematical model of the WT also allows for the calculation of the optimal velocity, so the captured energy will be a maximum one.…”

Section: The Mathematical Model Of Wt (Mm-wt)mentioning

confidence: 99%

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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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