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Latest Wind Energy Whitepapers

Accurately forecasting O&M costs

This white paper explains some of the reasons why accurate O&M cost forecasts are important, along with some of the approaches that Romax InSight employs to estimate future failure rates and costs. read more →


Global wind statistics 2016

The Global Wind Energy Council (GWEC) published its annual statistics report for the global wind energy industry this week, revealing that a total of 54 gigawatts (GW) worth of wind energy was brought online in 2016, bringing the global cumulative total up to nearly 487 GW. China installed a total of… read more →


Wind Vision India 2032 : A Multi Stakeholder Perspective

Wind Vision 2032 covers the evolution of the sector, current landscape, critical issues that need attention, and proposes ways to reachhing 200 GW of wind capacity by 2032. read more →


Wind-solar hybrid energy production analysis report - NIWE

This report, prepared by National Institute of Wind Energy, Chennai, under direction from MNRE, focuses on integrated hybrid renewable energy projects consisting of wind and solar energy. NIWE chose 24 wind potential sites based on met-masts installed. The report gives the overall view of the wind and… read more →


Lightning Protection of Wind Turbine Regarding with Risk Management

This paper proposes a concept of lightning protection of wind turbine from the viewpoint of risk management. Lightning protection of wind turbine including design by manufactures and maintenance by operators should be done from the viewpoint of risk management. It is important to understand damage aspects,… read more →


Estimation of Weibull Distribution for Wind Speeds along Ship Routes

In order to evaluate potential benefits of new green shipping concepts that utilize wind power as auxiliary propulsion in ships or of offshore wind energy harvest, it is essential to have reliable wind speed statistics. A new method to find parameters in the Weibull distribution is given. It can be… read more →


Simulation of the Atmospheric Boundary Layer for Wind Energy Applications

Energy production from wind is an increasingly important component of overall global power generation, and will likely continue to gain an even greater share of electricity production as world governments attempt to mitigate climate change and wind energy production costs decrease. Wind energy generation… read more →


Voltage and Frequency Control of a Stand-alone Wind-energy Conversion System Based on PMSG

This paper presents a control strategy for a standalone wind-energy conversion system using Permanent Magnet Synchronous Generator (PMSG). The presented control strategy aims at regulating the load voltage in terms of magnitude and frequency under different operating conditions including windspeed variation,… read more →


Synthetic Generation of Wind Power Time Series for Wind/Storage Systems Integration Studies

This study proposes a new method for direct generation of synthetic wind power time series for a wind farm. The method combines the random nature of wind with the operational information of the wind turbines (i.e., failure and repair rates). It uses chronological or sequential Monte Carlo Simulation… read more →


A New Methodology for Urban Wind Resource Assessment

In the latest years the wind energy sector experienced an exponential growth all over the world. What started as a deployment of onshore projects, soon moved to offshore and, more recently to the urban environment within the context of smart cities and renewable micro-generation. However, urban wind… read more →


Attitude Tracking Control of an Airborne Wind Energy system

We study the control of an Airborne Wind Energy (AWE) system where a turbine is mounted on a rigid glider (or kite) with a fixed length tether connected between the kite center of gravity (CG) and the ground. The turbine on the kite in an AWE system extracts wind power in a high speed cross wind motion… read more →


Comparative Study of Spar-type Floating Horizontal and Vertical Axis Wind Turbines Subjected to Constant Winds

To date the spar-type floating horizontal axis wind turbine (FHAWT) has been widely investigated. Floating vertical axis wind turbines (FVAWTs) are also a promising solution for harvesting wind energy in deep waters. The present study deals with a comparison of a FHAWT with the NREL 5 MW wind turbine… read more →


Nonlinear, Optimal Control of Wind Energy Conversion Systems Using Differential SDRE

Wind energy has taken an important role in responding to overall energy demand and environmental concers. As the demand of the wind energy increase, investigations focus on maximizing the energy extraction and efficiency mostly through the design of key components such as blades, gearboxes, generators,… read more →


Power Control in Grid-Connected Wind Energy System Using Diode-Clamped Multilevel Inverter

This paper presents dynamic modelling and control of real and reactive power in grid-connected variable speed wind energy conversion system using diode-clamped multilevel inverter (DCMLI). A modified five-level DCMLI is used for power control, which eliminates the requirement of transformer and improves… read more →


Novel Airfoil Design for Small Horizontal Axis Wind Turbine : A Preliminary Result

Various research efforts have been directed towards the design and re-design of wind turbine systems. This is in order to have more efficient, better performing and cost effective turbine systems. Based on this, efforts have been focused on wind turbine rotor design with emphasis placed on its aerodynamics.… read more →


System Identification and Controller Design for Individual Pitch and Trailing Edge Flap Control on Upscaled Wind Turbines

This paper extends the design, implementation and analysis of individual pitch and TEFs to a range of classically scaled turbines between 5 and 20 MW. In order to avoid designing controllers which favour a particular scale, identical scale-invariant system identification and controller design processes… read more →


Design Space Exploration of Gyrocopter-type Airborne Wind Turbines

This paper presents a multidisciplinary framework for the design and analysis of gyrocopter-type airborne wind turbines. In this concept, four rotary wings provide lift to a flying vehicle, and excess power is extracted using gearboxes and generators before being transferred to the ground through electrical… read more →


Wind Energy System with a Pitch Adjustment System

The invention relates to a wind energy system with at least one pitch adjustment system for adjusting the pitch of at least one rotor blade of the wind energy system, wherein the pitch adjustment system comprises at least one electrohydraulic drive that comprises an unregulated electromotor rotating… read more →


A Dynamic Control Strategy for Wind Turbines in Wind Farms

This paper presents a new control method for wind turbine groups by use of dynamic control including pump-up operation. Under conditions of oscillating wind below the rated speed of the wind turbine, maximum power point tracking (MPPT) operation is critical to improving efficiency. Even though, owing… read more →


A Morphing Downwind-aligned Rotor Concept based on a 13-MW Wind Turbine

To alleviate the mass-scaling issues associated with conventional upwind rotors of extreme-scale wind turbines (?10?MW), a morphing downwind-aligned rotor (MoDaR) concept is proposed herein. The concept employs a downwind rotor with blades whose elements are stiff (no intentional flexibility) but with… read more →


Aerodynamic Wind Energy Conversion Device and Method For Controlling Such a Device

The invention relates to an aerodynamic wind energy conversion device and a method for controlling such a device. The aerodynamic wind energy conversion device comprises an aerodynamic wing; at least a first tractive line and a second tractive line; wherein ends of the tractive lines are connected to… read more →


Distributed Control System and Novel Power Take off Method for Pumping-mode Airborne Wind Energy

The robotic control of tethered parafoils enables a number of exciting applications, primarily a novel approach to wind energy generation. The airborne wind energy (AWE) paradigm aims to reduce greatly the mass and cost of materials required to generate electrical power from the wind. With innovative,… read more →


Efficient Spiral Wind-turbine Configuration

A system for converting wind energy to rotational mechanical energy, comprising a conical impeller having multiple spiral vanes on its outer surface, the impeller supported so that it can rotate about its vertical, central axis in response to airflow impinging on the impeller, and connected to a mechanical… read more →


Effects of Turbine Spacing on the Power Output of Extended Wind-farms

We present results from large eddy simulations of extended wind-farms for several turbine configurations with a range of different spanwise and streamwise spacing combinations. The results show that for wind-farms arranged in a staggered configuration with spanwise spacings in the range ?[3.5,8]D, where… read more →


Sliding Mode Voltage Control Strategy for Capturing Maximum Wind Energy Based on Fuzzy Logic Control

A sliding mode voltage control strategy is proposed in this paper to capture the maximum electrical energy from wind. This control strategy mainly includes a fuzzy logic controller and a sliding mode voltage controller. The fuzzy logic controller is designed to derive the optimum DC-side voltage, while… read more →


Description and Computer Modeling of a Ball-and-Socket Hub that Enables Teetering for Three-Bladed Wind Turbines

A horizontal axis wind turbine with a ball-and-socket hub is disclosed. The hub enables horizontal axis turbines with two or more blades to teeter in response to wind shear gradients. Computer modeling was done using existing and modified FAST code in order to compare the new hub design with existing… read more →


Optimal Sizing of Solar Photovoltaic–Wind Hybrid System

Increase in energy demand has made the renewable resources more attractive. Additionally, use of renewable energy sources reduces combustion of fossil fuels and the consequent CO2 emission which is the principal cause of global warming. The concept of photovoltaic-Wind hybrid system is well known and… read more →


Modal Analysis of Wind Turbine Tower via its Continuous Model with Partially Fixed Foundation

The present paper concerns the application of the continuous model method to perform the modal structural analysis of the prototype of a wind turbine tower with partially fixed foundation. This mathematical method is used as an alternative approach to the standard modal analysis method that uses discrete… read more →


Lift Limit of Horizontal Axis Wind Turbine

The lift coefficient of any wind turbine must have highest limit. In this paper, an analytical expression of lift coefficient associated with tip-speed ratio and lift-drag ratio of airfoil of wind turbine with ideal chord has been deduced by integrating along the blade wingspan using the blade element… read more →


Multi-Turbine Wind-Solar Hybrid System

In the paper, a new type of wind-solar hybrid system was proposed, in which multiple small wind turbines took the place of a bigger one. The electricity performance of the multi-turbine wind-solar hybrid system was studied in comparison with the traditional system. Two types of wind-solar hybrid system… read more →


Power system frequency response from fixed speed and doubly fed induction generator based wind turbines

Throughout Europe there is an increasing trend of connecting high penetrations of wind turbines to the transmission networks. This has resulted in transmission system operators revising their grid code documents for the connection of large wind farms. These specifications require large MW capacity wind… read more →


A wind-hydrogen energy storage system model for massive wind energy curtailment

With wind energy penetration rate increasing, wind energy curtailment turns severe in some wind farms nowadays and new wind farm construction trends to aggregate this situation. Therefore the need for massive energy storage technology such as “Power to gas” is growing. In this study, a model of… read more →


Construct and craft an effective O&M programme

This white paper will reveal: RELATIVE TECHNOLOGY PERFORMANCE: Comparison of the reliability of wind turbine models according to relative maturity and how technology is evolving and adapting IMPACT OF O&M STRATEGY ON PROJECT PERFORMANCE: Examining four strategies (a baseline, crane, spares and access… read more →


Wind Turbine Availability Excellence

“The world faces a once-off transition to sustainability,” says Dr Eddie O’Connor, CEO at Mainstream Renewable Power. “By reducing our dependence on imported fossil fuels and shifting to low carbon sources of power generation, we can grow the economy and lower the price the consumer pays for… read more →


Wind Rush

A wind rush is sweeping the world. In 2011, worldwide wind capacity reached 239 GW, a rise from 17.4 GW in just a decade according to the World Wind Energy Association. "It's come a long way in terms of installed capacity, geographic diversity, the maturity of the technology, and the size of the turbines.… read more →


The Environmental Implications of Offshore Wind Generation

This paper will consider the existing noise sources present in the sea, the likely noise and vibration generated by offshore wind farms, the sensitivity of marine organisms to sound and finally, the possible impact of noise and vibration from offshore wind farms on the denizens of the sea. read more →


Industrial Fiber Optic Products for Wind Turbine and Wind Farm Applications

Conversion of wind energy into utility grade AC power requires power electronics, such as rectifi ers and inverters. In a high power generation system, galvanic insulation becomes very important to ensure the quality and reliability of the power generation. Fiber optic components off er protection by… read more →


CDM Potential of Wind Power Projects in India

So far, the cumulative installed capacity of wind power projects in India is far below their gross potential (? 15%) despite very high level of policy support, tax benefits, long term financing schemes etc, for more than 10 years etc. One of the major barriers is the high costs of investments in these… read more →


An analysis of Opportunities in the Wind Power Value Chain

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Wind Farm Design: Planning, Research and Commissioning

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Wind Farm Siting and Layout Design

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Determination of Plant Load Factor for Wind Turbine Generators in Maharashtra, Gujarat and Tamilnadu

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Offshore Wind Power in India - Opportunities and Challenges

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Indian Wind Energy Outlook 2011

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Wind Farm

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