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Grand challenges in the science of wind energy
Modern wind turbines already represent a tightly optimized confluence of materials science and aerodynamic engineering. Veers et al. review the challenges and opportunities for further expanding this technology, with an emphasis on the need for interdisciplinary collaboration. They highlight the need to better understand atmospheric physics in the regions where taller turbines will operate as well as the materials constraints associated with the scale-up. The mutual interaction of turbine sites with one another and with the evolving features of the overall electricity grid will furthermore necessitate a systems approach to future development. Science , this issue p. eaau2027 Harvested by advanced technical systems honed over decades of research and development, wind energy has become a mainstream energy resource. However, continued innovation is needed to realize the potential of wind to serve the global demand for clean energy. Here, we outline three interdependent, cross-disciplinary grand challenges underpinning this research endeavor. The first is the need for a deeper understanding of the physics of atmospheric flow in the critical zone of plant operation. The second involves science and engineering of the largest dynamic, rotating machines in the world. The third encompasses optimization and control of fleets of wind plants working synergistically within the electricity grid. Addressing these challenges could enable wind power to provide as much as half of our global electricity needs and perhaps beyond.
Journal Article
Wind power
Readers learn about the history of wind power, how it is used today and how it may be used as an energy source in the future.
Book
Grid converters for photovoltaic and wind power systems
Advancements in grid converter technology have been pivotal in the successful integration of renewable energy. The high penetration of renewable energy systems is calling for new more stringent grid requirements. As a consequence, the grid converters should be able to exhibit advanced functions like: dynamic control of active and reactive current injection during faults, and grid services support. <p>This book explains the topologies, modulation and control of grid converters for both photovoltaic and wind power applications. In addition to power electronics, coverage focuses on the specific applications in photovoltaic and wind power systems where grid condition is an essential factor.</p> <p>With a review of the most recent grid requirements for photovoltaic and wind power systems, the relevant issues are discussed:</p> <ul> <li> <div>Modern grid inverter topologies for photovoltaic and wind turbines</div> </li> <li> <div>Islanding detection methods for photovoltaic systems</div> </li> <li> <div>Synchronization techniques based on second order generalized integrators (SOGI)</div> </li> <li> <div>Advanced synchronization techniques with robust operation under grid unbalance condition</div> </li> <li> <div>Resonant controller techniques for current control and harmonic compensation</div> </li> <li> <div>Grid filter design and active damping techniques</div> </li> <li> <div>Power control under grid fault conditions, considering both positive and negative sequences</div> </li> </ul> <p>Throughout, the authors include practical examples, exercises, and simulation models and an accompanying website sets out further modeling techniques using MATLAB® and Simulink environments and physical security information management (PSIM) software.</p> <p><i>Grid Converters for Photovoltaic and Wind Power Systems</i> is intended as a course book for graduate students with a background in electrical engineering and for professionals in the evolving renewable energy industry. For professors interested in adopting the course, a set of slides is available for download from the website.</p> <p><b>Companion Website</b></p> <p><a href=\"http://www.wiley.com/go/grid_converters\">www.wiley.com/go/grid_converters</a></p>
eBook
Copula‐based joint distribution analysis of wind speed and wind direction: Wind energy development for Hong Kong
Accurate and reliable assessment of wind energy potential has important implication to the wind energy industry. Most previous studies on wind energy assessment focused solely on wind speed, whereas the dependence of wind energy on wind direction was much less considered and documented. In this paper, a copula‐based method is proposed to better characterize the direction‐related wind energy potential at six typical sites in Hong Kong. The joint probability density function (JPDF) of wind speed and wind direction is constructed by a series of copula models. It shows that Frank copula has the best performance to fit the JPDF at hilltop and offshore sites while Gumbel copula outperforms other models at urban sites. The derived JPDFs are applied to estimate the direction‐related wind power density at the considered sites. The obtained maximum direction‐related wind energy density varies from 41.3 W/m2 at an urban site to 507.9 W/m2 at a hilltop site. These outcomes are expected to facilitate accurate micro‐site selection of wind turbines, thereby improving the economic benefits of wind farms in Hong Kong. Meanwhile, the developed copula‐based method provides useful references for further investigations regarding direction‐related wind energy assessments at various terrain regions. Notably, the proposed copula‐based method can also be applied to characterize the direction‐related wind energy potential somewhere other than Hong Kong.
Journal Article
Wind towers : architecture, climate and sustainability
This book offers a holistic treatment of wind towers, from their underlying scientific principles to design and operation. It includes suggestions for optimization based on the authors' own research findings from recent analytical studies.
Book
Assessing climate change impacts on the near-term stability of the wind energy resource over the United States
The energy sector comprises approximately two-thirds of global total greenhouse gas emissions. For this and other reasons, renewable energy resources including wind power are being increasingly harnessed to provide electricity generation potential with negligible emissions of carbon dioxide. The wind energy resource is naturally a function of the climate system because the \"fuel\" is the incident wind speed and thus is determined by the atmospheric circulation. Some recent articles have reported historical declines in measured near-surface wind speeds, leading some to question the continued viability of the wind energy industry. Here we briefly articulate the challenges inherent in accurately quantifying and attributing historical tendencies and making robust projections of likely future wind resources. We then analyze simulations from the current generation of regional climate models and show, at least for the next 50 years, the wind resource in the regions of greatest wind energy penetration will not move beyond the historical envelope of variability. Thus this work suggests that the wind energy industry can, and will, continue to make a contribution to electricity provision in these regions for at least the next several decades.
Journal Article
Offshore wind energy technology
This reference book is based on research material developed by the Norwegian Research Centre for Offshore Wind Technology and teaching material developed by the authors over the last 20 years. It covers all aspects of offshore wind energy technology including the wind resource and the offshore environment; wind energy conversion systems technology, control and materials; grid connection and system integration; novel structures including bottom-fixed and floating; operation and maintenance strategies and technologies; and design tools for novel offshore wind energy concepts.
Book
Grid integration of wind energy : onshore and offshore conversion systems
This popular reference describes the integration of wind-generated power into electrical power systems and, with the use of advanced control systems, illustrates how wind farms can be made to operate like conventional power plants.
Fully revised, the third edition provides up-to-date coverage on new generator developments for wind turbines, recent technical developments in electrical power conversion systems, control design and essential operating conditions. With expanded coverage of offshore technologies, this edition looks at the characteristics and static and dynamic behaviour of offshore wind farms and their connection to the mainland grid.
Brand new material includes:
* comprehensive treatment of onshore and offshore grid integration
* updated legislative guidelines for the design, construction and installation of wind power plants
* the fundamental characteristics and theoretical tools of electrical and mechanical components and their interactions
* new and future types of generators, converters, power electronics and controller designs
* improved use of grid capacities and grid support for fixed- and variable-speed controlled wind power plants
* options for grid control and power reserve provision in wind power plants and wind farms
This resource is an excellent guide for researchers and practitioners involved in the planning, installation and grid integration of wind turbines and power plants. It is also highly beneficial to university students studying wind power technology, renewable energy and power systems, and to practitioners in wind engineering, turbine design and manufacture and electrical power engineering.
eBook