Size Effects in DAWT Innovative Wind Energy System Design

1983 ◽  
Vol 105 (4) ◽  
pp. 401-407 ◽  
Author(s):  
K. M. Foreman
Keyword(s):  
Wind Energy ◽  
Weight Ratio ◽  
Energy System ◽  
Power Ratio ◽  
Direct Production ◽  
Wind Energy Conversion ◽  
Reinforced Plastics ◽  
Wind Energy System ◽  
The One ◽  
The Cost

By means of a case study, we examine the effect of size on the estimated weight and cost of an advanced wind energy conversion system, the diffuser-augmented wind turbine (DAWT) concept. Preliminary designs are described for three DAWT sizes (ratings) in each of three construction approaches: all-aluminum, ferrocement, and a hybrid fiberglass reinforced plastics (FRP) diffuser shell on an aluminum frame. Common design criteria are employed in designs for these three materials. Installed cost estimates are generated by professional industrial estimators. Excluding the foundation, it is concluded that for geometrically similar DAWTs the weight-to-power ratio varies approximately as the rotor diameter to the one third power, over a 4 to 1 change in rotor diameter, 2.7–11 m (9–36 ft). Futhermore, because the total direct production cost of these various DAWT units and designs proves to change by about D1.5, the cost-to-power ratio is approximately proportional to D−.5 and the cost/weight ratio varies as D−1/6. Therefore, for the investigated DAWT unit ratings between 5 and 200 kW, the larger units appear increasingly to become more efficient structures with apparently lower specific costs (dollars per kW) for each of three candidate construction approaches.

Methodology for optimal design and control of wind energy system based on simplifying assumptions

2021 ◽  
pp. 0309524X2110667
Author(s):  
Souhir Tounsi
Keyword(s):  
Wind Energy ◽  
Energy System ◽  
Chain Structure ◽  
Control Algorithms ◽  
Simulation Environment ◽  
Wind Energy Generation ◽  
Wind Energy System ◽  
Simplifying Assumptions ◽  
The Cost ◽  
And Control

The study presented in this paper concerns the development of a new methodology for design and controlling a wind energy generation chain. This methodology is based on combined Analytical-Finite Element-Experimental method. This type of converter chosen is an AC-DC inverter with IGBTs to improve the robustness of the power chain structure. It offers a reduction of the cost of the power chain and the improvement of the performances of the global studied system, as the control at power factor equal to unity and providing an electromagnetic torque which is added to the useful torque in order to extract the maximal energy. The control algorithms permit to regulate Le charging voltage and current in their rated values considered as optimal battery charging voltage and current. The global model of the power chain is implemented under the Matlab-Sumilink simulation environment for performance and efficiency analysis.

Model of wind energy system with reduced simulation time validated by classical equivalent model developed under Simulink

2021 ◽  
pp. 0309524X2110635
Author(s):  
Souhir Tounsi
Keyword(s):  
Wind Energy ◽  
Energy Conversion ◽  
Permanent Magnets ◽  
Energy System ◽  
Equivalent Model ◽  
Wind Energy Conversion ◽  
Wind Energy System ◽  
Energy Conversion System ◽  
Battery Energy ◽  
Simulation Time

Models of a wind energy conversion chain using classical Simulink models of a diode bridge exhibit significant simulation time making difficult its combination with large scales optimization approaches. For this purpose and to increase the degree of compatibility of wind turbine models with large scales optimization approaches such as those based on Genetic Algorithms, a wind energy conversion system having an horizontal axis propeller, an axial generator with permanent magnets, recharging a battery energy accumulator through a diode rectifier is modeled by simplified method reducing simulation time. Indeed, a model of the three phase’s diode rectifier making the simulation time considerably reduced compared to the existing model in the Simulink library is developed. This model is validated by comparison with the model using the classic Simulink library. Another objective of this study is the formulation of the useful torque optimization problem having an essential constraint the reduction of the generator phase’s inductance in the goal to reduce the overvoltage in generator phases.

scholarly journals Research Results for the Tornado Wind Energy System: Analysis and Conclusions

1985 ◽  
Vol 107 (1) ◽  
pp. 78-87
Author(s):  
E. W. Jacobs
Keyword(s):  
Wind Energy ◽  
System Analysis ◽  
Energy System ◽  
Power Coefficient ◽  
Research Results ◽  
Air Supply ◽  
Cost Of Energy ◽  
Energy System Analysis ◽  
Wind Energy System ◽  
The Cost

The Tornado Wind Energy System (TWES) concept utilizes a wind-driven vortex confined by a hollow tower to create a low-pressure core intended to serve as a turbine exhaust reservoir. The turbine inlet flow is provided by a separate ram air supply. Numerous experimental and analytical research efforts have investigated the potential of the TWES as a wind energy conversion system (WECS). The present paper summarizes and analyzes much of the research to date on the TWES. A simplified cost analysis incorporating these research results is also included. Based on these analyses, the TWES does not show any significant promise of improving on either the performance or the cost of energy attainable by conventional WECS. The prospects for achieving either a system power coefficient above 0.20 or a cost of energy less than $0.50/kWh (1979 dollars) appear to be poor.

scholarly journals Load Current Observer and Adaptive Voltage Controller for Standalone Wind Energy System with Linear and Non-linear Loads

2019 ◽  
Vol 9 (1) ◽  
pp. 5491-5499 ◽  
Keyword(s):  
Wind Energy ◽  
Pulse Width Modulation ◽  
Energy System ◽  
Load Current ◽  
Wind Energy Conversion ◽  
Voltage Controller ◽  
Three Phase ◽  
Wind Energy System ◽  
Non Linear ◽  
Unbalanced Loads

The Wind Energy Conversion System (WECS) is one of the most important renewable energy systems in the existing power network, which can be operated in either grid connected or standalone mode. In the standalone WECS, voltage and frequency variations are more due to the wind speed variations, load changes and switching surges. In this paper, space vector pulse width modulation based adaptive voltage controller with load current observer is used to control the voltage and frequency, for the standalone or isolated WECS. The isolated system is simulated using MATLAB/Simulink and the results are analysed when three-phase non-linear and linear (Resistive and Inductive) balanced and unbalanced loads are connected.

Comparative Analysis of Various Types of Control Techniques for Wind Energy Conversion System

2022 ◽  
pp. 143-174
Author(s):  
Bibhu Prasad Ganthia ◽  
Subrat Kumar Barik ◽  
Byamakesh Nayak
Keyword(s):  
Wind Energy ◽  
Energy System ◽  
Pollutant Emission ◽  
Wind Energy Conversion System ◽  
Renewable Source ◽  
Wind Energy Conversion ◽  
Wind Energy System ◽  
Conversion System ◽  
Energy Conversion System ◽  
Wind Energy Systems

The interest towards renewable energy has been enhanced due to zero pollutant emission. Considering the present scenario, wind as a renewable source of energy is highly recommended. As it is freely available and free from pollution, wind can effectively play a role for energy generation. This can produce quality power during grid integrations as the load demands. Due to rapid variations in wind speed, wind energy systems need highly synchronized and powerful controller techniques for power regulations to overcome transients, voltage sags, and swells. A suitable and responsive controller is essential for power generation from wind energy. The controllers for wind energy system are categorized into five controller designs according to their locations to control the demand of the turbine system during grid integrations. In this chapter, various controller designs and implementations are highlighted with reference to previous works and existing studies.

scholarly journals Artificial Neural Networks Applied to a Wind Energy System

2020 ◽  
Vol 9 (4) ◽  
pp. 416-420
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Wind Energy ◽  
Control Strategies ◽  
Direct Torque Control ◽  
Energy System ◽  
Torque Control ◽  
Wind Energy Conversion ◽  
Wind Energy System ◽  
Artificial Neural

In this context, we are taking a close interest in the optimization of wind energy production. It consists in designing simple to implement control strategies of a wind energy conversion system, connected to the network based on the Double Fed Induction Generator (DFIG) driven by the Converter Machine Side (CSM) in order to improve the performance of Direct Torque Control (DTC) and Direct Power Control (DPC). For this purpose, the artificial neural networks (ANNs) is used. Hysteresis comparators and voltage vector switching tables have been replaced by a comparator based on artificial neural networks. The same structure is adopted to build the two neural controllers, for the DTC - ANN and for the DPC - ANN. The simulation results show that the combination of classical and artificial neural network methods permit a double advantage: remarkable performances compared to the DTC-C and DPC-C and a significant reduction of the fluctuations of the output quantities of the DFIG and especially the improvement of the harmonics rate currents generated by the machine.

scholarly journals Enhancement of Power Quality in a Grid Integrated WECS with Shunt Voltage Controller

2021 ◽  
Vol 309 ◽  
pp. 01166
Author(s):  
K. Veeresham ◽  
Lade Abhinandh ◽  
B. Neelakanteshwarrao
Keyword(s):  
Wind Energy ◽  
Power Quality ◽  
Energy System ◽  
Wind Energy Conversion ◽  
Voltage Controller ◽  
Linear Load ◽  
Wind Energy System ◽  
Non Linear ◽  
Non Linear Load ◽  
Fuzzy Logic Technique

This paper deals with study of wind energy conversion system when it is interconnected with the grid. Main objective of the paper is to improve the quality of the power when wind energy system is linked with the non-linear loads. In this work DSTATCOM (FACTS Device) is used as a shunt active controller which used to reduce harmonics, when grid is interconnected with the non-linear load. In this work a new methodology is proposed i.e., Fuzzy Logic technique is integrated in the control circuit of DSTATCOM that helps to compare the reference voltage and output voltage of grid in order to minimize the error and improve power quality

scholarly journals The Modeling and Simulation of Wind Energy Based Power System using MATLAB

2011 ◽  
pp. 119-126
Author(s):  
Suman Nath ◽  
Somnath Rana
Keyword(s):  
Power System ◽  
Wind Energy ◽  
Modeling And Simulation ◽  
Energy System ◽  
Matlab Simulation ◽  
Turbine Generator ◽  
Wind Energy Conversion ◽  
Wind Turbine Generator ◽  
Wind Energy System ◽  
Energy Conversion System

Modeling and simulation of a grid connected wind-driven electricity generation system or WECS (an acronym for Wind Energy Conversion System) has been done. Our aim is to design and test a power system of 14.9 KVA capacity, operating at 440V, 20m/s base wind speed, induction generator based-wind energy system via. MATLAB simulation. The different components of a wind energy system namely the wind turbine, generator, controller system, rectifier-inverter, battery , load and other equipments including transformers, grid etc. were decided as per the scope of this project following which the design steps and modeling of the system in MATLAB simulation environment - SIMULINK was undertaken.

scholarly journals Techniques for a Wind Energy System Integration with an Islanded Microgrid

2016 ◽  
Vol 17 (2) ◽  
pp. 191-203 ◽  
Author(s):  
Megha Goyal ◽  
Yuanyuan Fan ◽  
Arindam Ghosh ◽  
Farhad Shahnia
Keyword(s):  
Wind Energy ◽  
System Integration ◽  
Low Frequency ◽  
Synchronous Generator ◽  
Energy System ◽  
Wind Energy Conversion ◽  
Ac Power ◽  
Wind Energy System ◽  
Energy Conversion System ◽  
Islanded Microgrid

Abstract This paper presents two different techniques of a wind energy conversion system (WECS) integration with an islanded microgrid (MG). The islanded microgrid operates in a frequency droop control where its frequency can vary around 50 Hz. The permanent magnet synchronous generator (PMSG) based variable speed WECS is considered, which converts wind energy to a low frequency ac power. Therefore it needs to be connected to the microgrid through a back to back (B2B) converter system. One way of interconnection is to synchronize the MG side converter with the MG bus at which it is connected. In this case, this converter runs at the MG frequency. The other approach is to bring back the MG frequency to 50 Hz using the isochronization concept. In this case, the MG side converter operates at 50 Hz. Both these techniques are developed in this paper. The proposed techniques are validated through extensive PSCAD/EMTDC simulation studies.

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