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The whole world is focusing on the utilization of renewable energy sources in order to mitigate the world power crisis. Power electronics is being used in a large scale for the renewable energy conversion in a more efficient manner. It has a great impact on controlling as well as interfacing the renewable system with both the grid and standalone applications. Hence more and more emphasis is given...
Wind energy use has shown a remarkable increase in last years. In order to achieve the highest efficiency with the best characteristics in wind turbines, it is necessary to analyze relevant factors in wind energy conversion. In this review a state of the art is presented focused on modeling, constitutive elements, structure and control of wind generation systems and the increasing use of wind energy...
This paper investigates a drive system control strategy for grid-connected wind energy conversion systems with doubly-fed induction generator and its behavior under grid fault operation. During grid faults there is a possibility for undefined load situations in the mechanical drive system. These loads are able to start oscillations in the drive system not only in the shaft but in the blades as well...
In recent years, concern has grown towards renewable energy sources particularly wind energy for the production of electricity. The scientist and researchers have gone through rigorous study and experimentation to search the solution for fruitful utilization of wind energy. Our day to day activity is heavily based on energy, hence the work towards energy research is highly important and sensitive...
This paper investigates a drive system control strategy for grid-connected wind energy conversion systems with doubly-fed induction generator and its behavior under grid fault operation. During grid faults there is a possibility for undefined load situations in the mechanical drive system. These loads are able to start oscillations in the drive system not only in the shaft but in the blades as well...
The rapid increase in global energy consumption and the impact of greenhouse gas emissions has accelerated the transition towards greener energy sources. The need for distributed generation employing renewable energy sources such as wind, solar and fuel cells has gained significant momentum. Advanced power electronic systems, affordable high performance devices, and smart energy management principles...
With the advances of power electronic technologies and permanent magnet materials, there have been great interest to direct driven permanent magnet synchronous generators (PMSG) among wind turbine manufactures. Since PMSG directly connected to the wind turbine, controlling of the power electronic converters has vital role at gearless connection. This paper presents grid side converter (GSC) control...
The use of renewable energy sources are increased because of the depletion of natural resources and the increasing pollution level from energy production. The wind energy and the solar energy are most widely used among the renewable energy sources. Power electronics is needed in almost all kinds of renewable energy system. It controls the renewable source and interfaces with the load effectively,...
In this paper, a control method for a Wind Energy Conversion System (WECS) utilizing a Squirrel Cage Induction Generator (SCIG) is presented. Aims of the control are both maximum wind power harvesting and minimization of the SCIG power loss, thus achieving maximum power production on any wind speed. The SCIG is connected to the utility grid through two back-to-back converters. The first converter...
Theoretical background included in part 1 of this work has shown the wide variety that the wind energy industry is offering in terms of electrical/electronic components and configurations. Though the first part of the course provides the student with an updated knowledge of the current technological status of the wind energy conversion systems (WECS), from the educational point of view the lectures...
Wind energy conversion systems (WECS) is currently a hot topic for electrical and electronic engineers because of the wide range of topologies that both manufacturers and researchers are designing. Different types of electrical generators, power converters and configurations have been recently proposed and this serves as a centre of interest for engineering students. Wind energy is also an application...
The electrical energy consumption continues to grow and more applications are based on electricity. We can expect that more 60% of all energy consumption will be converted and used as electricity. Therefore, it is a demand that production, distribution and use of electrical energy are done as efficient as possible. Further, the emerging climate changes is arguing to find sustainable future solutions...
The electrical energy consumption continues to grow and more applications will be based on electricity in the next decades. We can expect that more 60 % of all energy consumption will be converted and used as electricity. It is a demand that production, distribution and use of electrical energy are done as efficient as possible. Further, emerging climate changes argues to find future solutions which...
As wind power achieves higher penetration levels and becomes a more and more substantial portion of our electric energy supply, more stringent requirements are being placed on wind plants. As wind plants displace traditional synchronous generators in terms of percentages, the wind plants must also do their part to maintain stability and reliability of the power system. Modern power electronics are...
With increased wind power penetration level, new grid codes generally require the wind power system be able to stay connect during a grid voltage sag. Voltage sag generator (VSG) is a kind of device used to simulate the fault condition so as to verify the reliability and stability of wind power system during low voltage ride-through (LVRT). Firstly, two existing VSG topologies which are based on the...
This review paper focuses on the three main electrical aspects in the wind energy conversion system (WECS): 1) wind turbine generators (WTGs), 2) power electronics converters (PECs) and 3) grid-connection issues. The current state of wind turbine generators are discussed and compared in some criteria along with the trends in the current WECS market, which are `Variable Speed', `Multi-MW' and `Offshore'...
This paper gives a brief history of wind turbines and what it typically used for. It also analyzes the theory of the wind turbine as well as the parts involved in a correct wind turbine, types of wind turbines, implementation on power systems, and possible advancements in wind power.
This paper is concerned with the behavior of a variable-speed wind energy conversion system, in order to assess the power quality injected in the electrical grid. Different topologies for the power-electronic converters are considered, namely two-level and multilevel converters. We use pulse width modulation by space vector modulation associated with sliding mode for controlling the converters, and...
The global electrical energy consumption is still rising and there is a steady demand to increase the power capacity. It is expected that it has to be doubled within 20 years. The production, distribution and use of the energy should be as technological efficient as possible and incentives to save energy at the end-user should be set up. Deregulation of energy has lowered the investment in larger...
This paper describes the models of a wind power system, such as the turbine, generator, power electronics converters and controllers, with the aim to control the generation of wind power in order to maximize the generated power with the lowest possible impact in the grid voltage and frequency during normal operation and under the occurrence of faults. The presented work considers a wind power system...
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