Control and System Integration of a Small Vertical-Axis Wind Rotor Coupled a Generator Having Two Windings

2013 ◽  
Vol 284-287 ◽  
pp. 1072-1076
Author(s):  
Yung Chia Hsiao
Keyword(s):  
Power System ◽  
Wind Turbine ◽  
Wind Power ◽  
System Integration ◽  
High Efficiency ◽  
Vertical Axis ◽  
Rotor Speed ◽  
Horizontal Axis Wind Turbine ◽  
Speed Regime ◽  
Wind Power System

Increase in the efficiency of a small vertical-axis wind turbine (VAWT) elevates its potential that compares with a horizontal-axis wind turbine (HAWT). The efficiency does not only depend on the power coefficient of the wind rotor but also on the efficiency of the generator. A permanent magnet synchronous generator having two windings keeps high efficiency in both of low rotor speed regime and high rotor speed regime. To maximize the electricity output of the VAWT, this study directly coupled a generator having 1kW winding and 3kW winding with a straight wing vertical-axis wind rotor as a 4kW VAWT. Meanwhile, system integration and control systems of the wind power system were developed to make sure the operation and the safety of the VAWT. The average efficiency of the wind power system is 0.32 through field tests. The results demonstrated that the small VAWT has the same potential in comparison with two small HAWTs via using the electrical generator having two windings.

Feasibility analysis of a new tree-shaped wind turbine for urban application: A case study

2019 ◽  
Vol 31 (7) ◽  
pp. 1230-1256
Author(s):  
Ali Mostafaeipour ◽  
Mostafa Rezaei ◽  
Mehdi Jahangiri ◽  
Mojtaba Qolipour
Keyword(s):  
Wind Turbine ◽  
Wind Power ◽  
Urban Areas ◽  
High Efficiency ◽  
Cost Effective ◽  
Electricity Production ◽  
Levelized Cost Of Electricity ◽  
Wind Turbine System ◽  
Wind Power System ◽  
Bandar Abbas

In this study, feasibility of a new wind power generation system for urban application in Hormozgan Province of Iran is investigated. The wind turbine system in this study is a novel, aesthetically pleasing, noiseless, pollution-free, potentially cost-effective, and high efficiency design called tree-shaped wind turbine (TSWT). Techno-economic evaluation is performed on eight urban areas in the province using the software HOMER. Multi-criteria decision making approaches are used to prioritize the areas in terms of the best location for installing such a new system. The results of techno-economic analysis examining a wind power system consisting of 25 TSWTs show that the most electricity production would occur for Jask city which is 529,450 kWh/yr. Also, the least amount of electricity which is 339,275 kWh/yr belongs to Bandar Abbas. Considering the most important criteria including electricity production, levelized cost of electricity, population, land price, environmental impact, and frequency of natural disasters, data envelopment analysis, and the fuzzy technique for order of preference by similarity to ideal solution are employed to rank the cities. The results are validated by two different methods. Finally, it is suggested that Sirik is the best location for using the aforementioned wind turbine.

Transient Stability of Wind Power System with DFIG

2014 ◽  
Vol 986-987 ◽  
pp. 635-638
Author(s):  
Li Sa Guo
Keyword(s):  
Mathematical Model ◽  
Power System ◽  
Wind Turbine ◽  
Wind Power ◽  
Pitch Angle ◽  
Transient Stability ◽  
Equivalent Model ◽  
Wind Power System ◽  
Doubly Fed ◽  
Infinite Power

Analyzed mathematical model of wind power which consist doubly-fed wind turbine (DFIG).Strategies for pitch angle control were developed.Used MATLAB to establish equivalent model contain infinite power system concluding DFIG ,The results showed that wind power with DFIG have good transient stability.

Wind Power System Optimization Control Simulation

2013 ◽  
Vol 313-314 ◽  
pp. 817-820
Author(s):  
Yue Hua Huang ◽  
Guang Xu Li ◽  
Huan Huan Li
Keyword(s):  
Power System ◽  
Simulation Model ◽  
Wind Turbine ◽  
Wind Power ◽  
System Optimization ◽  
Operation Condition ◽  
Power System Optimization ◽  
Variable Speed Wind Turbine ◽  
Wind Power System ◽  
And Control

This paper establishes the wind power system simulation model in Simulink/ Matlab environment. By adjusting the speed of variable speed wind turbine, the simulation model can keep running at the best operation condition, and then achieve maximum power transfer. In this process, this paper use PI controller to track and control the speed of wind turbine. Simulation results show that selecting the appropriate PI parameters can effectively track the speed and increase the efficiency of wind power generation system.

Development of a high-efficiency and long-life 500W class H-Darrieus-type vertical axis wind turbine (VAWT) system using skin-spar-foam sandwich composite structure

2013 ◽  
Vol 20 (4) ◽  
pp. 383-394
Author(s):  
Changduk Kong ◽  
Haseung Lee
Keyword(s):  
Wind Turbine ◽  
Large Scale ◽  
High Efficiency ◽  
Vertical Axis ◽  
Small Scale ◽  
Test Results ◽  
Vertical Axis Wind Turbine ◽  
Horizontal Axis Wind Turbine ◽  
Structural Test ◽  
The City

AbstractSince the focus on the energy crisis and environmental issues due to excessive fossil fuel consumption, wind power has been considered as an important renewable energy source. Recently, several megawatt-class large-scale wind turbine systems have been developed in some countries. Even though the large-scale wind turbine can effectively produce electrical power, the small-scale wind turbine has been continuously developed due to some advantages; for instance, it can be easily built at a low cost without any limitation of location, i.e., even in the city. In case of small-scale wind turbines, the vertical axis wind turbine (VAWT) is used in the city despite having a lower efficiency than the horizontal axis wind turbine. Furthermore, most small-scale wind turbine systems have been designed at the rated wind speed of around 12 m/s. This aim of this work is to design a high-efficiency 500W class composite VAWT blade that is applicable to relatively low-speed regions. With regard to the aerodynamic design of the blade, parametric studies are carried out to decide an optimal aerodynamic configuration. The aerodynamic efficiency and performance of the designed VAWT is confirmed by computational fluid dynamics analysis. The structural design is performed by the load case study, initial sizing using the netting rule and the rule of mixture, structural analysis using finite element method (FEM), fatigue life estimation and structural test. The prototype blade is manufactured by hand lay-up and the matched die molding. The experimental structural test results are compared with the FEM analysis results. Finally, to evaluate the prototype VAWT including designed blades, the performance test is performed using a truck to simulate various ranges of wind speeds and some measuring equipment. According to the performance evaluation result, the estimated performance agrees well with the experimental test results in all operating ranges.

The Development of the Efficiency Enhancement Mechanism of the Vertical Axis Wind Turbine

2012 ◽  
Vol 499 ◽  
pp. 336-341
Author(s):  
Qi Yao ◽  
Ying Xue Yao ◽  
Liang Zhou ◽  
Zhi Peng Tang
Keyword(s):  
Wind Turbine ◽  
Clean Energy ◽  
Vertical Axis ◽  
Efficiency Enhancement ◽  
Vertical Axis Wind Turbine ◽  
Horizontal Axis Wind Turbine ◽  
Advantages And Disadvantages ◽  
Energy Issue ◽  
New Energy ◽  
Wind Power System

The energy issue has been the focus of world’s attention. Wind plays a crucial role in the development and application of new energy as a renewable and clean energy. Wind turbine is the core component of the wind power system. It usually can be divided into horizontal axis wind turbine (HAWT) and vertical axis wind turbine (VAWT) by the relative position of the spindle and the ground. This paper analyzes the advantages and disadvantages of VAWT and summarizes the improvement of the VAWT from the energy congregating technology and self-starting technology which can provide technical support for the research of VAWT in the future.

Development of a High Efficiency and Long Life 500W Class H-Darrieus Type VAWT (Vertical Axis Wind Turbine) System Using Skin-Spar-Foam Sandwich Composite Structure

2012 ◽  
Author(s):  
Changduk Kong ◽  
Haseung Lee
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Large Scale ◽  
Performance Test ◽  
High Efficiency ◽  
Vertical Axis ◽  
Small Scale ◽  
Vertical Axis Wind Turbine ◽  
Horizontal Axis Wind Turbine ◽  
Structural Test

Since the energy crisis and the environmental issue have been focused due to excessive fossil fuel consumption, the wind power has been considered as an important renewable energy source. Recently, several MW class large scale wind turbine systems have been developed in some countries. Even though the large scale wind turbine can effectively produce the electrical power, the small scale wind turbines have been continuously developed due some advantages, for instance, it can be easily built by low cost without any limitation of location, i.e. even in city. In case of small scale wind turbines, the vertical axis wind turbine (VAWT) is used in city having frequent wind direction change, even though it has a bit lower efficient than the horizontal axis wind turbine. Furthermore, most small scale wind turbine systems have been designed at the rated wind speed of around 12m/s. This work is to design a high efficiency 500W class composite VAWT blade which is applicable to relatively low speed region. In the aerodynamic design of blade, the parametric studies are carried out to decide an optimal aerodynamic configuration. The aerodynamic efficiency and performance of the designed VAWT is confirmed by the CFD analysis. The structural design is performed by the load case study, the initial sizing using the netting rule and the rule of mixture, the structural analysis using FEM, the fatigue life estimation and the structural test. The prototype blade is manufactured by the hand lay-up and the matched die molding. The experimental structural test results are compared with the FEM analysis results. Finally, to evaluate the prototype VAWT including designed blades, the performance test is performed using a truck to simulate the various range wind speeds and some measuring equipments. According to the performance evaluation result, the estimated performance is well agreed with the experimental test result in all operating ranges.

Overview of the Low Voltage Ride-Through Technology for Direct-Drive Permanent Magnetic Wind Power System

2011 ◽  
Vol 383-390 ◽  
pp. 424-429
Author(s):  
Xin Zhang Huo ◽  
Xiang Ning Xiao
Keyword(s):  
Adverse Effect ◽  
Power System ◽  
Wind Turbine ◽  
Wind Power ◽  
Low Voltage ◽  
Direct Drive ◽  
Low Voltage Ride Through ◽  
Control Objective ◽  
On Line ◽  
Wind Power System

In recent years, the proportion of the wind power in the grid is increasing rapidly. In addition, the penetration of wind power in grid has been rising. It will lead adverse effect to grid, if the wind turbine off-grid during the fault of network. Wind power technology-leading countries have issued the quantitative standards of fault through which requires on-line operation .In this paper, the influence of wind turbines off-grid on the grid and turbines during the fault of grid is analyzed firstly. Meanwhile, the control objective of the low voltage ride through (LVRT) is proposed. Several types of LVRT technology for the Permanent Magnetic wind Power System are summarized and evaluated respectively. Finally, the developing direction of this technology is drawn from the above discussion.

scholarly journals A Vertical-Axis Off-Grid Squirrel-Cage Induction Generator Wind Power System

Energies ◽  
2016 ◽  
Vol 9 (10) ◽  
pp. 822 ◽  
Author(s):  
Peifeng Xu ◽  
Kai Shi ◽  
Feifei Bu ◽  
Dean Zhao ◽  
Zhiming Fang ◽  
...  
Keyword(s):  
Power System ◽  
Wind Power ◽  
Vertical Axis ◽  
Induction Generator ◽  
Squirrel Cage ◽  
Wind Power System ◽  
Squirrel Cage Induction Generator

Wind power system reliability and maintenance optimization considering turbine and wind uncertainty

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Zhigang Tian ◽  
Han Wang
Keyword(s):  
Wind Speed ◽  
Power System ◽  
Wind Turbine ◽  
Wind Power ◽  
System Reliability ◽  
Reliability Assessment ◽  
Optimal Number ◽  
Power System Reliability ◽  
Content Type ◽  
Wind Power System

PurposeWind power is an important source of renewable energy and accounts for significant portions in supplying electricity in many countries and locations. The purpose of this paper is to develop a method for wind power system reliability assessment and condition-based maintenance (CBM) optimization considering both turbine and wind uncertainty. Existing studies on wind power system reliability mostly considered wind uncertainty only and did not account for turbine condition prediction.Design/methodology/approachWind power system reliability can be defined as the probability that the generated power meets the demand, which is affected by both wind uncertainty and wind turbine failures. In this paper, a method is developed for wind power system reliability modeling considering wind uncertainty, as well as wind turbine condition through health condition prediction. All wind turbine components are considered. Optimization is performed for maximizing availability or minimizing cost. Optimization is also conducted for minor repair activities to find the optimal number of joint repairs.FindingsThe wind turbine condition uncertainty and its prediction are important for wind power system reliability assessment, as well as wind speed uncertainty. Optimal CBM policies can be achieved for optimizing turbine availability or maintenance cost. Optimal preventive maintenance policies can also be achieved for scheduling minor repair activities.Originality/valueThis paper considers uncertainty in both wind speed and turbine conditions and incorporates turbine condition prediction in reliability analysis and CBM optimization. Optimization for minor repair activities is studied to find the optimal number of joint repairs, which was not investigated before. All wind turbine components are considered, and data from the field as well as reported studies are used.

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