A novel hybrid transmission for variable speed wind turbines

Jelaska, Damir; Podrug, Srđan; Perkušić, Milan

doi:10.1016/j.renene.2015.04.021

Cited by 29 publications

(17 citation statements)

References 6 publications

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“…Over the years, research in the field of WTs has covered more and more issues regarding the improvement of their performance by introducing new concepts of WTs with variations in both shape and number of rotors and/or blades, by designing more efficient and downsized transmission systems of different types of WTs in terms of energy output [24,28,29,45]. The dynamic analysis of CRWTs is approached in [46,47], while numerical simulations of the aerodynamic performance of a CRWT are presented in [5,9,48,49]. Different adaptive methods for fast optimal pitch angle control of the WTs under variable wind speeds are proposed in the literature, e.g., by using artificial neural network (ANN) controllers, fuzzy logic based controllers, or hybrid ANN-fuzzy controllers [50].…”

Section: Introductionmentioning

confidence: 99%

Design and Simulation of a 1 DOF Planetary Speed Increaser for Counter-Rotating Wind Turbines with Counter-Rotating Electric Generators

2019

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The improvement of wind turbine performance poses a constant challenge to researchers and designers in the field. As a result, the literature presents new concepts of wind turbines (WTs), such as: counter-rotating wind turbines (CRWTs) with two coaxial wind rotors revolving in opposite directions, WTs with higher-efficiency and downsized transmission systems, or WTs with counter-rotating electric generators (CREGs). Currently, there are a few solutions of WTs, both containing counter-rotating components; however, they can only be used in small-scale applications. Aiming to extend the use of WTs with counter-rotating wind rotors (CRWRs) and CREGs to medium- and large-scale applications, this paper introduces and analyzes a higher-performance WT solution, which integrates two counter-rotating wind rotors, a 1 degree of freedom (DOF) planetary speed increaser with four inputs and outputs, and a counter-rotating electric generator. The proposed system yields various technical benefits: it has a compact design, increases the output power (which makes it suitable for medium- and large-scale wind turbines) and allows a more efficient operation of the electric generator. The kinematic and static computing methodology, as well as the analytical models and diagrams developed for various case studies, might prove useful for researchers and designers in the field to establish the most advantageous solution of planetary speed increasers for the CRWTs with CREGs. Moreover, this paper extends the current database of WT speed increasers with an innovative concept of 1 DOF planetary gearbox, which is subject to a patent application.

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Section: Introductionmentioning

confidence: 99%

Design and Simulation of a 1 DOF Planetary Speed Increaser for Counter-Rotating Wind Turbines with Counter-Rotating Electric Generators

2019

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“…Without a speed-up gearbox and a frequency converter, the generator can output power to the grid at a constant frequency. Jelaska et al (Jelaska, D., Podrug, S., Perku, I. M., 2015) proposed a novel power synthesis hybrid transmission that can convert the wind turbine speed to the constant speed of the generator spindle. Krupke et al (Krupke, C., Wang, J., Clarke, J. et al, 2017) introduced a new power distribution device by continuously variable transmission connection of the turbine drive shaft with an air compressor.…”

Section: Introductionmentioning

confidence: 99%

Grid-Connected Control of Wind Turbine with Differential Speed Regulation Based on Fuzzy Decision Makings

Rui¹,

Xie²,

Fan³

et al. 2019

MAS

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To solve the problem of grid-connected control of differential speed-regulating wind turbines, the wind turbine, transmission chain, speed-regulating motor, and generator model of the unit are constructed using the MATLAB/Simulink platform. The differential speed-regulating control system is designed on the basis of slip-frequency and fuzzy control theories. The speed control function and characteristics on maximum power tracing of wind turbine is tested via simulation. Meanwhile, the experimental bench for the differential speed-regulating wind power system is set up. Test results indicate that the generator speed is controlled by speed-regulating motor with output voltage and frequency that are approximately synchronized with those of power grid under idle load condition. The maximum wind-power utilization coefficient is maintained by fuzzy controller under the rated wind speed. Thus, the accuracy and efficiency of the designed control system is proven and provide important implications for further investigations on the grid-connected control of wind turbines with differential speed regulation.

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“…To overcome these problems, some novel concepts of hybrid drive wind turbines are proposed in which speed regulating devices perform well at the front‐end of synchronous generator (SG) to get constant‐frequency power. With advanced technologies of mechanical transmission and servo control, SG can get the driving torque with constant frequency if we consider wind wheel speeds and power grid frequency as reference parameters . In terms of the control strategies used in speed regulating system, Idan et al designed a robust control method for the WT with planetary differential transmission to maintain the optimal power output during changing wind speeds.…”

Section: Introductionmentioning

confidence: 99%

“…With advanced technologies of mechanical transmission and servo control, SG can get the driving torque with constant frequency if we consider wind wheel speeds and power grid frequency as reference parameters. [11][12][13][14] In terms of the control strategies used in speed regulating system, Idan et al 15 designed a robust control method for the WT with planetary differential transmission to maintain the optimal power output during changing wind speeds. Aiming at the same control objective (ie, the maximal output power), Petković et al 16 proposed a novel intelligent controller based on adaptive neuro-fuzzy inference system.…”

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confidence: 99%

Fractional‐order sliding mode control for hybrid drive wind power generation system with disturbances in the grid

et al. 2018

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The proposal of hybrid drive grid‐connected wind turbine based on speed regulating differential mechanism (SRDM) has been made in this paper to generate constant‐frequency power without fully‐ or partially‐rated frequency converters so as well improve electric power quality. However, disturbances in the power grid including sudden load fluctuation and sub‐synchronous resonance (SSR) can lead to the pulsating torque to act on the shaft section between SG and exciter at the main generator collector, such that the speed regulating accuracy of SRDM is seriously affected. As a result, this paper synthesizes a new‐type fractional‐order sliding mode controller (FOSMC) with a load torque observer (LTO) for the high‐accuracy speed control of permanent magnet synchronous motor (PMSM) in SRDM. Taking advantage of ridge regression algorithm, related parameters including rotational inertia and viscous friction coefficient of speed regulating system are calculated accurately. Finally, comparative experiments are carried out under four cases of mean of 5, 10, 13, and 21 m/s wind speeds to verify the satisfactory performances of designed FOSMC with LTO. Comparative experimental results show that FOSMC with LTO can effectively eliminate undesirable chattering effect. Additionally, under operating conditions of changing wind speeds, SSR, and sudden load fluctuation in power grid, the output speed of SRDM that corresponds directly to the frequency output of SG can be steadily and accurately regulated by using proposed control scheme. SRDM equipped with designed controller enables the power frequency to meet the National Standard of PR China perfectly.

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A novel hybrid transmission for variable speed wind turbines

Cited by 29 publications

References 6 publications

Design and Simulation of a 1 DOF Planetary Speed Increaser for Counter-Rotating Wind Turbines with Counter-Rotating Electric Generators

Design and Simulation of a 1 DOF Planetary Speed Increaser for Counter-Rotating Wind Turbines with Counter-Rotating Electric Generators

Grid-Connected Control of Wind Turbine with Differential Speed Regulation Based on Fuzzy Decision Makings

Fractional‐order sliding mode control for hybrid drive wind power generation system with disturbances in the grid

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