wind turbine power Articles
-
Productivity of small wind turbines for various wind potentials conditions: application in Bulgaria and Corsica
Less or more accurate power curve models are generally used to simulate the wind turbine electrical production versus the available wind speed. However, if such models are adapted to large machines, this is not the case for small ones. The objective of this paper is to study the impact of different small-scale wind turbines power curves and wind distributions on the electrical production. An ...
-
Harmonic and interharmonic distortion analysis in the grid-connected wind electric generator
The operation of wind turbines has an impact on the power quality at the connected electric network. The integration of wind electric generators with the power grid becomes a headache for power engineers in several aspects. Harmonic distortion is one of the most important phenomena which affect the grid performance. This paper provides an in-depth discussion on harmonic and interharmonic ...
-
A summary of wind power impacts on electric power system operating costs
Wind power plant output depends on wind speed. Such speeds cannot be accurately predicted over daily periods because the wind fluctuates from minute-to-minute and hour-to-hour. Consequently, electric utility system planners and operators are concerned that variations in wind plant output may increase the operating costs of the system. This concern arises because the system must maintain balance ...
-
Terminal characteristics of type 1 wind generating systems with magnetic saturation
This paper proposes a simple method of incorporating magnetic saturation in determining terminal characteristics of a type 1 wind generating system employing a squirrel–cage induction generator. In determining the terminal characteristics, the generator is represented by its traditional per–phase equivalent circuit as well as two–axis model. In both cases, the magnetic saturation is carefully ...
-
Vector control of current regulated inverter connected to grid for wind energy applications
Connecting variable speed wind turbine connected to the grid requires a proper control of the inverter to improve the power quality for the system. The vector control of an inverter connected to the grid is presented. The proposed control technique implies a hysteresis current controller in the inner loop. The complete control system has been developed, analysed, and validated by simulation ...
-
Wind energy today and in the 21st century
Wind energy is the most promising of the new renewable sources of energy. By the end of 1998, the global installed capacity of modern grid connected wind turbines was some 10,000 MW, and the growth rates of installations worldwide are 30%-40% annually. The cost of wind energy was reduced by 30% between 1991 and 1997 and the cost reduction is foreseen to continue. This article reviews the reasons ...
-
New Generation Small Wind Turbines for Remote Power Systems and Grid Connection
In this collaborative activity Partners will undertake research and develop economically viable, reliable small wind turbines for remote power systems located away from the electricity grid as well as for connection into the grid. This project will study small wind turbine operation in a wide range of situations, with the goals of improving design, developing safety methodologies and reducing ...
-
Wind power smoothing using rotor inertia aimed at reducing grid susceptibility
Due to wind speed variations, the output power of wind turbines fluctuates. These power fluctuations make the wind power undispatchable. Furthermore, they can cause frequency deviations and power outage particularly when wind power penetration is significant. This paper presents a novel control method to mitigate the power fluctuations using the rotor inertia as an energy storage component. ...
-
Operation and control of multiple Distributed Generation systems in the microgrid
This paper investigates the operation and control of multiple Distributed Generation (DG) systems interconnected to the utility in the form of microgrid. The developed model of the microgrid consists of microturbine generation system, converter-based DG system with stiff DC source, synchronous-generator-based DG system and wind power system with induction generator. The Simulation model of the ...
-
Evolution of collaborative innovation network in China's wind turbine manufacturing industry
This paper studies the 'catching–up' process of China's emerging wind turbine manufacturing ecosystem, and analyses the dynamics of the shifting collaborative innovation network for the period 1980–2011. We have focused on the leading wind turbine manufacturers [i.e., manufacturers of entire wind turbine system integrators (EWSIs)], as well as manufacturers of the turbines' sub–ecosystems (i.e., ...
-
Efficiency stimulus will lower energy bills, says federal report
Depending on your position, the federal stimulus money is either a jobs builder or a national budget buster. The Energy Information Administration offers another take. In a recent analysis, the EIA finds that stimulus money should reduce what consumers and businesses pay to heat, cool and light buildings. The federal agency this month updated its annual energy outlook to compare how energy ...
-
Dynamic validated model of a DFIG wind turbine
This paper presents the development and qualitative validation of a doubly-fed induction generator (DFIG) wind turbine model that is represented in terms of behaviour equations of each of the subsystems, mainly the turbine rotor, the drive train, the induction generator, the power converters and associated control systems and a protection system. Simulation results obtained from the models are ...
-
Steady-state analysis of doubly fed induction generators for wind turbines using MATLAB
A wind energy conversion system (WECS) differs from a conventional power system. The power output of a conventional power plant can be controlled whereas; the power output of a WECS depends on the wind. This nature of WECS makes it difficult for analysis, design and management. Various approaches have been developed to study the behaviour of WECS. In this paper, the steady-state characteristics ...
-
Research and development in ocean energy technologies
The volatile fuel prices for electricity generation, elevated concerns about global warming and energy security has prompted countries to look for alternative energy sources. One of the alternative energy sources is ocean energy. Currently, there is few ocean energy technologies that are commercially available to harness electrical energy from ocean despite the fact that ocean covers more than ...
-
Assessing the benefits of a provision of system services by distributed generation
Distributed Generation (DG) units are said to have the potential to become an integral part of the future power systems. Today, DG units are characterised by high specific investment costs, but nevertheless are politically promoted because of their high degree of energy efficiency and their capability of reducing the current dependency on fossil fuels. However, at longer term DG units have to ...
-
How sustainable are our energy technologies? Photovoltaics and wind energy systems as examples
The energy sector plays a key role within the concept of Sustainable Development. Therefore, sustainability aspects should be considered when new energy systems are assessed. How does a specific supply option contribute to a desired sustainable development of the energy system? To answer this question, indicators are needed. These should cover the most significant sustainability issues of the ...
-
Reducing costs of emerging renewable energy technologies – an analysis of the dynamic development with wind power as case study
Renewable energy is considered important to improve environmental performance and the long-term security of energy supply. As most renewable energy technologies are not competitive in conventional power markets, they need public support in order to become so. The purpose of this paper is to discuss and understand the dynamic structure in development of renewable energy technologies in connection ...
-
Variable susceptance excitation control for dynamic performance improvement of a stand-alone wind turbine induction generator system
Isolated wind farms employ simple squirrel cage induction generators driven by variable speed wind turbines. Lacking control capability, such generation can contribute very little to network support. Wind turbines mostly do not take part in voltage and frequency control and if a disturbance occurs, the turbines may be disconnected and reconnected when normal operation has been resumed. From ...
-
Adiabatic compressed air energy storage plants for efficient peak load power supply from wind energy: the European project AA-CAES
With the continuing expansion of electricity generation from fluctuating wind power the grid-compatible integration of renewable energy sources is becoming an increasingly important aspect. Adiabatic compressed air energy storage power plants have the potential to make a substantial contribution here. The present article describes activities and first results relating to this technology that are ...
-
Helplessly exposed to nature? How lightning storms can be measured
Each day, there occur about 1,000 thunderstorms with 4-10 million lightning bolts worldwide. In average, 700 people per year are hit by such light discharges, of which 75% of the hits result in long-term damages. Between three and seven cases end fatal. The risk is particularly high in the open field and is fortunately decreasing. The reason for this is that we stay more often inside in cars and ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you