The History and State of the Art of Variable-Speed Wind Turbine Technology

Carlin, P.W.; Laxson, A.; Muljadi, Eduard

doi:10.2172/776935

Cited by 101 publications

(57 citation statements)

References 20 publications

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“…From the late 1990s, fully variable speed wind turbines were introduced in wind power industry. The first generation of fully variable speed wind turbines (with power ratings of approximately 1 MW) used a multi-stage gearbox, a relatively low-cost standard wound rotor induction generator, and a power electronic converter feeding the rotor [22]. The doubly fed induction generator (DFIG) technology is currently the most widely used in the wind turbine industry because of its low investment cost and good energy yield [23].…”

Section: Wind Turbine System Considered In This Studymentioning

confidence: 99%

An FMEA-Based Risk Assessment Approach for Wind Turbine Systems: A Comparative Study of Onshore and Offshore

2014

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Failure mode and effects analysis (FMEA) has been extensively used by wind turbine assembly manufacturers for analyzing, evaluating and prioritizing potential/known failure modes. However, several limitations are associated with its practical implementation in wind farms. First, the Risk-Priority-Number (RPN) of a wind turbine system is not informative enough for wind farm managers from the perspective of criticality; second, there are variety of wind turbines with different structures and hence, it is not correct to compare the RPN values of different wind turbines with each other for prioritization purposes; and lastly, some important economical aspects such as power production losses, and the costs of logistics and transportation are not taken into account in the RPN value. In order to overcome these drawbacks, we develop a mathematical tool for risk and failure mode analysis of wind turbine systems (both onshore and offshore) by integrating the aspects of traditional FMEA and some economic considerations. Then, a quantitative comparative study is carried out using the traditional and the proposed FMEA methodologies on two same type of onshore and offshore wind turbine systems. The results show that the both systems face many of the same risks, however there are some main differences worth considering.

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Section: Wind Turbine System Considered In This Studymentioning

confidence: 99%

An FMEA-Based Risk Assessment Approach for Wind Turbine Systems: A Comparative Study of Onshore and Offshore

2014

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“…Equation (4) establishes the conditions for steady state, and then its solution can be used as an initial condition when solving Equation (3). This characteristic is very important since in many cases it is difficult to obtain a steady-state solution of a dynamic non-linear system [20,21].…”

Section: Companion Harmonic Circuit Modellingmentioning

confidence: 99%

Harmonic Modelling of the Wind Turbine Induction Generator for Dynamic Analysis of Power Quality

et al. 2018

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Abstract:Given the increasing integration of wind-based generation systems into the electric grid, efforts have been made to deal with the problem of power quality associated with the intermittent nature of these systems. This paper presents a new modelling approach oriented towards harmonic distortion analysis of the induction machine for wind power applications. The model is developed using companion harmonic circuit modelling, which is a natural approach for analysis of the adverse effects of harmonic distortion in electric power systems, and represents an easier solution method than the well known dynamic harmonic domain, since it solves algebraic equations instead of state-space differential equations. The structure of the companion circuits simplifies both the formulation and solution for power systems with wind-based generation systems. This approach is especially useful for analysis of the harmonic interaction in transient and steady states between the wind power generator and the power system, whose interconnection is made through electronic converters. The proposed model allows us to compute the dynamics of the wind turbine, which are influenced by disturbances such as changes in the wind velocity, voltage fluctuations, electric waveform distortion, and mechanical vibrations, among other factors. Moreover, the cross-coupling between harmonic components at different frequencies is considered. The proposed model represents an integral framework of the electrical and mechanical subsystems of a wind turbine, allowing for analysis of the interactions between them, and understanding power quality degradation behaviour as well as causes and consequences, while also giving useful information on the field of simulation and control. To test the performance of the proposed model, a test power system is used to obtain the behaviour of a wind turbine induction generator in response to typical power quality disturbances, i.e., harmonic distortion, and voltage sags and swells. Then, the dynamics of the variables considering their harmonic interactions are analysed.

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“…Variable speed wind turbine systems are more widely used, especially in high power applications, because they have many operational and economic advantages over fixed speed wind turbine systems, such as improving system efficiency and power quality, better energy capture, reduced mechanical load and stress, providing simple pitch control, and being cost-effective [1][2][3]. Variable speed wind turbine systems can be divided into two main categories [4,5]: direct-in-line wind turbine systems and DFIG wind turbine systems. In direct-in-line wind turbine systems, a synchronous generator is used and the low-speed turbine rotor is directly coupled to the generator shaft.…”

Section: Introductionmentioning

confidence: 99%

Electrical design and testing of a 500 kW doubly fed induction generator for wind power applications

Ulu¹,

Kömürgöz²

2017

Turk J Elec Eng & Comp Sci

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Abstract:In this study, the electrical design and testing of a 500 kW doubly fed induction generator (DFIG) is presented, developed in the context of the MILRES (Turkish National Wind Energy Systems) Project. The main objective of the MILRES Project is to encourage locally produced equipment for wind power systems. Therefore, in the DFIG design, the standard construction capabilities of the local machine manufacturers are especially taken into consideration. In this way, it is aimed that the designed DFIG can easily and cost-effectively be manufactured by local machine manufacturers in Turkey. In the DFIG design procedure, initially, an analytical design of the DFIG is performed depending on specified design criteria. Then the analytical design is verified by using finite element analysis. Depending on the obtained results in electromagnetic analyses, the DFIG design is modified in order to improve the obtained performance further. Finally, the designed DFIG is manufactured and its performance tests are performed at three different operating points. The test results verify the analyses results and show that the designed DFIG satisfies the desired performance criteria.

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The History and State of the Art of Variable-Speed Wind Turbine Technology

Cited by 101 publications

References 20 publications

An FMEA-Based Risk Assessment Approach for Wind Turbine Systems: A Comparative Study of Onshore and Offshore

An FMEA-Based Risk Assessment Approach for Wind Turbine Systems: A Comparative Study of Onshore and Offshore

Harmonic Modelling of the Wind Turbine Induction Generator for Dynamic Analysis of Power Quality

Electrical design and testing of a 500 kW doubly fed induction generator for wind power applications

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