In the time of current trend of increasing energy consumption, the wind-power engineering may compensate considerable part of required electric energy. Rapid wind-power engineering development is considered to be one of the important sources of human need satisfaction. Conventional wind turbine control strategies are dedicated to ensure high energy conversion efficiency under varying wind conditions. The challenge in wind power control engineering is to design an adaptive wind turbine control strategy, which provides the dynamic system stability and the effectiveness of energy conversion. The aim of this book is to design and implement the control algorithm, which implies the electromagnetic torque control in order to adapt the rotor speed and keep high energy conversion efficiency. Wind turbine operation is considered in the partial-load regime. The stability of the purposed control system is studied using linear control theory concepts. The effectiveness of the wind energy conversion is proved by the simulation results in MATLAB Simulink environment.
Due to random variations of wind speed, output power of a wind turbine generator fluctuates continuously. The power and voltage quality of a wind power system consisting of Induction Generator (IG) based wind turbine (IGWT), IGWT with voltage control device and Doubly Fed Induction Generator (DFIG) based wind turbine (DFIGWT) are presented in this work. Blade pitch angle control to limit the output power at turbine’s nominal power is also presented. It is reported that the DFIG-based wind turbine system can smooth the output power and also maintain the terminal voltage at a desired level, as DFIG with two back-to-back voltage source converters that use IGBTs and a capacitor acts as the DC voltage source has real and reactive power control abilities. The comparative results show that DFIGWT-based wind farm (DFIG_WF) has the best response, IGWT-based wind farm (IGWF) with voltage control device has better and IGWF has the worst response. Results indicate that the fluctuation of output power at higher rated rotor speed (near turbine’s base wind speed) and terminal voltage are almost nil for DFIG_WF. All the analysis were carried out using SimPowerSystem tool box in MATLAB.
As wind turbines increase in size, numbers, and their operating conditions become more extreme, a number of current and future tribological challenges exist. The supervisory control and data acquisition system (SCADA) installed at individual wind turbines records turbine specific information. Quite often, the information recorded by the SCADA systems is used reactively when a failure occurs the wind turbine. This Book presents approaches to utilize SCADA system prognostically. A variety of ways in which the wind turbine data can be utilized in performance monitoring are discussed with real failure cases. Approaches discussed here provides a cheap, but effective ways to fault prognosis and performance monitoring of wind turbines.
This book represents different types of renewable energy, the behavior of renewable energy.The world is hunger of energy. The conventional energy is decreasing day by day. The use and necessity of renewable energy is discussed with respect to all over the world. A wind farm consists of several wind turbines.It is essential to connect the wind farm. Wind energy and wind firm are also discussed then it covers essential topics about wind turbine systems such as wind turbine generation system, wind power output, mechanical power extracted from wind.The speed of wind is not constant as well as the generated voltage is not also constant.Finally a wind farm integrated power system is designed and in simulation it is tried to keep the voltage constant by controlling the pitch angle of the wind turbine.
The primary task of a wind turbine is to generate electricity from the wind and to supply the produced power to the user. Control of a wind turbine is an integral part of the wind power generation system for proficient operation of the wind turbine, to ensure the maximum power production and finally, maximum energy capture from a wind turbine system. In order to avoid problems at installation, it is required to test the power electronics and study the performance of the controller in a laboratory environment. The aim of this book is therefore to propose and validate maximum power point control strategies for wind turbine and most importantly, to develop a prototype of a small wind energy conversion system that emulates the steady state and dynamic behavior in a laboratory environment.
Grouted connections are highly utilized in the expanding offshore wind energy generation industries, providing a very efficient method for connecting foundation substructure to the tower of an offshore wind turbine. Offshore wind turbines are primarily exposed to overturning moment, arising from both the aerodynamic and hydrodynamic sources. So far, no design standard provides analytical methods to account for this kind of load transfer through the grouted connection. The intention of this paper is to demonstrate that analytical estimations can be formulated that reasonably agree with both experimental and numerical analyses of such connections. It is based on a theoretical approach, involving both theory of elasticity and finite element methods. The analytical approach involves various aspects of vector calculus, boundary value problems, potential energy formulations, harmonic functions and solution methods for 1, 2 and 3-dimmensional systems of equations. The finite element approach involves theoretical background on general FE formulations, solution methods, boundary definitions and contact problems.
The integration of wind power into the grid is now increasing at a significant pace which poses new challenges for power system operators which result to revisions of grid code requirements (GCR) in many countries. In these grid codes, fault ride through is of primary concern. The reason for this is that when large amount of wind energy is supplying the grid, they have to continuously supply power during fault to avoid large frequency deviation. There is even bigger challenge of wind power technology which to bear the same responsibilities for contribution to power system management as conventional synchronous generators does. This is a huge challenge, considering that wind power generation differs fundamentally from conventional generation in various ways Large scale connection of wind generation will influence the levels of damping of the power system. Inadequate network damping causes instabilities, the most common of which are shown in the electromechanical modes of oscillations.
In the small wind energy domain, the existing knowledge of the system of a Permanent Magnet Generator (PMG)-based small wind turbine system design and performance is quite rich. In sharp contrast, studies with emphasis on the system of Wound Rotor Induction Generator (WRIG)-based small wind turbine system are very few. However, despite such rapid growth of the PMG-based system, it is difficult to predict the future for both systems. This is because ideas borrowed from other fields or other applications could have profound effects on future penetration. In this context, this research presents a performance and reliability investigation of both systems with a special focus on the power electronics and led the future of wind energy conversion system in an unique direction.
Ever wondered, how it feel likes to be sitting on a giant ferris wheel which is 90 m high, 126 m wide and spinning at a speed of 80 m/s: fearsome, thrilling, exciting? Now imagine this happening for 20 long years; what then? The book is written exactly to narrate those feelings, only in a subtle "Engineer's" way. It deals with a composite blade for a wind turbine and its journey of life where impetus is given on its structural strength and robustness in terms of fatigue life.
Extraction of wind energy by use of wind turbine has proven to be an attractive augmentation for ever growing energy requirements. The size of turbine blades has steadily increased so that single machines can deliver power in excess of 2 Mega Watts. Owing to this, blade flexibility assumes great importance in design and operation. This study focuses on behaviour of wind turbine blades due to inherent flexibility. Extensive analysis is carried out using both linear panel method and more complex Reynolds Averaged Navier-Stokes (RANS) based Computational Fluid Dynamics (CFD) approach. A procedure is also presented to couple aerodynamic and structural solutions resulting in fully converged bent shapes of typical stall regulated wind turbine blades.
Investigation of the voltage and frequency control of a wind diesel hybrid system with several diesel gensets and dump load with Simulink models and validation with some measurements on a real system. The wind power is just depending on the wind conditions. Hence, the diesel generation has to include the enough control in order to keep the permissible frequency and voltage limits and to verify the power balance at every moment. These two are the main points where the analysis must be focused on. Many simulations about these systems have already been done, but a possible extension can be including in the model several wind turbines and diesel gensets, which could work at the same time. That complicates the analysis due to the interaction among them, and even more when setting some different dynamic parameters on the diesel gensets, as the inertia values. Regarding to a real system with this performance, there are some additional difficulties that the system has got, just because it is operating as an isolated one: bigger voltages and frequency deviations; the smaller the electrical machines, the more important the saturation; etc.
IEEE & IJCEE 1. The author has provided a sufficiently critical evaluation from which one can deduce that this work can potentially produce a significant contribution to the subject area. 2. The paper was organized well and is having good technical merit suits to smart grid conferences and research work in present scenario. 3. This is a much better technique to assure the better speed and torque control by using sophisticated ANN controller than with conventional PI controller
With technology advancements our world energy needs are growing at faster rate than ever before. To fulfill these needs we need to look for different ways to harvest energy, one of the way is using wind energy. A great deal of work is been done on commercial scale wind turbine but domestic side is always over looked. There is a great potential for small-scale wind turbine on domestic scale to full fill modern household electricity needs. This book contains information to make a domestic wind turbine, right from design concepts till production. It gives you general aerodynamic theories of wind turbine, components of a general wind turbine, their design and ideas about energy storage system.