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This paper presents WECS (wind energy conversion system) installed with BTB (back-to-back) medium voltage diode clamped five-level converter and SCIG (Squirrel-Cage-Induction-Generator) for a large capacity wind turbine (5MW). The DTC (direct torque control) has been used for the machine side diode clamped five-level converter. The use of DTC with the MLC (multilevel converter) gives a better performance...
In recent years, there has been significant growth in wind energy based power generation. This has encouraged research on the various aspects and effect of the installation of wind power plants. Wind turbine emulators (WTE) are being employed in research laboratories as they reproduce the torque developed by a wind turbine at a given wind speed. Commonly, DC motors or induction motors are employed...
Wind energy technology has seen steady growth in the energy market as a clean, renewable source of energy. This has brought attention to areas with moderate wind energy potentials. Darrieus type Vertical Axis Wind Turbines (VAWTs) allows capturing of this potential for energy production at a cost-effective scale. To improve the performance of these turbines their design needs to be modified. With...
This paper proposes a three term PID controller to achieve optimum tip-speed ratio of a variable speed fixed pitch two-mass wind turbine system. The main advantage of the method is the functional simplicity and the robust performance in a wide range of operating condition. The objective is achieved by maintaining optimum speed of the rotor via adjusting the restoring generator torque. Hence, PID controller...
A novel predictive direct torque control (DTC) based on cost function for doubly fed induction generator is proposed in this paper. Finite control set model predictive control (FCS-MPC) predicts the torque and rotor flux for the next duration of switching and chooses and applies the best voltage vector for adjusting the electromagnetic torque and the rotor flux in their reference values. This paper...
The small wind turbines (SWTs) provide a lot of alternative power for electrical devices. In this study, the reasons for the weak efficiency of SWTs in charge applications of batteries are investigated and suggested structures to enhance the output power of the wind turbines are discussed. The study methodology is based on defining various study cases combining structural and operational parameters...
This paper presents a study of a Wind Energy Conversion System (WECS) based on Permanent Magnet Synchronous Generator. The effectiveness of the WECS can be greatly improved by proposing a comparison of different MPPT methods based on PI, IP and fuzzy logic controllers. The control strategy can be divided into three parts: the DC motor is controlled in intent to emulate the wind turbine and delivering...
The software QBlade under General Public License is used for analysis and design of wind turbines. QBlade uses the Blade Element Momentum (BEM) method for the simulation of wind turbines and it is integrated with the XFOIL airfoil design and analysis. It is possible to predict wind turbine performance with it. Nowadays, Computational Fluid Dynamics (CFD) is used for optimization and design of turbine...
A wind energy conversion system with maximum power tracking using a switched reluctance generator is presented in this paper. Maximum power point tracking of the wind turbine is achieved by sensing the wind speed and adjusting the wind turbine shaft speed for optimal tip speed ratio. Outer speed loop with proportional-integral controller generates the current reference used by the inner current loop...
In this paper is presented an algorithm for estimating the wind speed by solving the non-linear model of a wind turbine (WT) using the Newton Raphson iterative method. The wind speed estimations obtained are used for computing the WT generator speed that maximize the extraction of wind power. This optimum generator speed is used as reference for the speed controller of a permanent magnet synchronous...
This paper focuses on design analysis issues of direct driven permanent magnet synchronous generator (DDPMSG) which are widely used in large scale wind turbines. The permanent magnet synchronous generator (PMSG) of 1.5 MW output power which is driven directly without gear system is analyzed by Maxwell 2D RMxprt. The characteristics of generator include the cogging torque, induced coil voltages at...
In this paper, we present a robust control of a variable-speed wind turbine with fixed pitch angle and strategy MPPT control associated on a Permanent Magnet Synchronous Generator (PMSG). This paper first proposes the PITCH angle fixed and control strategy used Maximum Power Point Tracking (MPPT) below the rated speed, which corresponds to low and high wind speed, and the maximum energy can be captured...
In this paper, we propose a new strategy for Direct Torque Neural Network Control, compatible with a voltage inverter three level and exploit artificial intelligence tools namely: neural networks. In addition, the use of multi-level inverter and the artificial techniques contribute to improved performance of the control of the wind energy conversion system. In fact, the use of (multilevel converter)...
The present paper purpose an adaptive observer (AO) based scheme to detect and isolate (FDI) faults occurring in Pitch systems and Converter for wind turbines based a benchmark model. The sensor faults in pitch systems of the wind turbine are transformed as actuator faults. Some representative simulation results are given to show the effectiveness of the proposed FDI scheme.
The aim of this paper is to control a Wind Energy Conversion System (WECS), equipped with a Permanent Magnet Synchronous Generator (PMSG), for maximum power generation. Maximum Power Point Tracking (MPPT) control algorithm is applied to a PMSG whose stator is connected to the grid through a back-to-back AC-DC-AC converter. The Stator Side Converter (SSC) is controlled in such a way to extract the...
Vertical axis wind turbines (VAWT) have a number of advantages over the horizontal axis wind turbines (HAWT), however the performance is a little smaller, so that researchs for their development should be continued for the implementation of these turbines in urban environment for electrical energy generation. This paper provides an overview of characterization of the VAWT, through a literature review,...
This paper approaches the electromagnetic design and finite-element analysis of a radial flux NdFeB permanent magnet synchronous machine for use as direct-driven generator with low speed micro-wind turbines. The design evaluation of the radial-flux spoke-type permanent magnet (RFPM) generator, based on 2-D and 3-D finite element field analysis, proves that this topology represents a good-performance...
The main objective of this paper is to apply a MPPT strategy (Maximum Power Point Tracking) to a wind energy system based on a doubly fed induction generator (DFIG) in order to maximize the converted power and provide better integration into the electrical grid. First, a mathematical model of wind power system is performed. Then, two control strategies of the system were studied and implemented. The...
This paper deals with the development of real time simulation for a Hybrid Wind — Tidal Power System. We present an advanced research device composed by two real time emulators, a wind turbine emulator and a tidal turbine emulator. As the chosen HILS concept needs real values (speed or torque in our case), it's emulators that provide this information. We can then study and develop the investigated...
The counter-rotating wind turbines (CRWT) is a wind turbine model developed from a single rotating wind turbine (SRWT) model with a horizontal axis. CRWTs have two rotors rotating in opposite directions on the same axis. The purpose of this research is to find the optimal power that can be produced by CRWTs, as related to the change of the axial distance between the front and rear rotors. The flow...
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