Modelling and Control of the Hydraulically Actuated Horizontal Axis Wind Turbine Pitch System

2019 ◽  
Author(s):  
P. Venkaiah ◽  
B. K. Sarkar
Keyword(s):  
Renewable Energy ◽  
Wind Energy ◽  
Wind Turbine ◽  
Wind Power ◽  
Pid Controller ◽  
Renewable Energy Sources ◽  
Horizontal Axis ◽  
Energy Sources ◽  
Horizontal Axis Wind Turbine ◽  
The World

Abstract The advantages of renewable energy sources are available freely in nature, inexhaustible, produce either no or little pollution and low gestation period. Among all renewable energy sources, wind energy has become one of the leading resources for power production in the world as well as in the India. According to WWEA, the wind turbine installation capacity in the world has been reached over 539.291GW by the end of 2017. The entire wind power installed capacity by the end of 2017 covers more than 5% of global demand of electricity. In India, the present wind power installation capacity on October, 2017 was over 32.7GW and wind energy contribution is 55% of the total renewable energy capacity in the country. Inspite of having sharp growth rate in wind in India, only a fraction of wind energy has been tapped until now out of 302 GW wind potential which is available above 100 m height on shore. Practical horizontal axis wind turbine converts kinetic energy in the wind into useful energy by using airfoil blades. Blade element momentum (BEM) theory becomes very popular due to its simplicity in mathematical calculation as well as accuracy. Hydraulic pitch actuation system has certain advantages due to its versatility, ability to produce constant force and torque irrespective of the disturbances outside of the system, ease and accuracy of control, simplicity, safety and economy. In the present study a semi rotary actuator has been utilized for turbine pitch actuation. In order to extract maximum power from available wind, fractional order PID controller (FOPID) has been developed for pitch control of wind turbine rotor blade. The performances of PID as well as FOPID controller have been compared with available wind data. The performance of FOPID controller was satisfactory compare to PID controller.

Use of the Savonius Wind Turbine for the Needs of Public Lighting

2014 ◽  
Vol 1008-1009 ◽  
pp. 179-182
Author(s):  
Iveta Gressová
Keyword(s):  
Energy Source ◽  
Renewable Energy ◽  
Wind Energy ◽  
Wind Turbine ◽  
Energy Use ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Geothermal Heat ◽  
Current Generation ◽  
Savonius Wind Turbine

Our planet gives us many mineral sources, but they have a big disadvantage. They are finite. Non-renewable energy sources are enough only for decades, exceptionally for centuries. Current generation is aware of the importance of using other energy sources, such as sunlight, wind, rain, tides, waves and geothermal heat. These energy sources are renewable. It means that they come from sources, which are naturally replenished on a human timescale. One of these sources is wind energy. Use of this kind of energy source needs an initial investment, but it can reduce cost of running a household and other sectors. This article is about Savonius wind turbine and its use for the needs of public lighting.

scholarly journals Aerodynamic Investigation of a Horizontal Axis Wind Turbine with Split Winglet Using Computational Fluid Dynamics

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4983 ◽  
Author(s):  
Miguel Sumait Sy ◽  
Binoe Eugenio Abuan ◽  
Louis Angelo Macapili Danao
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Renewable Energy ◽  
Wind Turbine ◽  
Renewable Energy Sources ◽  
Horizontal Axis ◽  
Horizontal Axis Wind Turbine ◽  
Wind Speeds ◽  
Blade Tip ◽  
Nrel Phase Vi

Wind energy is one of the fastest growing renewable energy sources, and the most developed energy extraction device that harnesses this energy is the Horizontal Axis Wind Turbine (HAWT). Increasing the efficiency of HAWTs is one important topic in current research with multiple aspects to look at such as blade design and rotor array optimization. This study looked at the effect of wingtip devices, a split winglet, in particular, to reduce the drag induced by the wind vortices at the blade tip, hence increasing performance. Split winglet implementation was done using computational fluid dynamics (CFD) on the National Renewable Energy Lab (NREL) Phase VI sequence H. In total, there are four (4) blade configurations that are simulated, the base NREL Phase VI sequence H blade, an extended version of the previous blade to equalize length of the blades, the base blade with a winglet and the base blade with split winglet. Results at wind speeds of 7 m/s to 15 m/s show that adding a winglet increased the power generation, on an average, by 1.23%, whereas adding a split winglet increased it by 2.53% in comparison to the extended blade. The study also shows that the increase is achieved by reducing the drag at the blade tip and because of the fact that the winglet and split winglet generating lift themselves. This, however, comes at a cost, i.e., an increase in thrust of 0.83% and 2.05% for the blades with winglet and split winglet, respectively, in comparison to the extended blade.

Mapping the future of offshore wind farming

Impact ◽  
2019 ◽  
Vol 2019 (9) ◽  
pp. 12-14
Author(s):  
Gwo-Shyh Song
Keyword(s):  
Renewable Energy ◽  
Wind Power ◽  
Nuclear Power ◽  
Renewable Energy Sources ◽  
Offshore Wind ◽  
Energy Sources ◽  
Reservoir Siltation ◽  
Geophysical Surveys ◽  
Major Interest ◽  
The World

Offshore wind farming is a growing presence in the renewable energy landscape but these ambitious projects rely on precise assessments of the hard to observe underwater landscape they will occupy before construction can even begin.<br/>Many governments around the world are moving toward renewable energy sources to meet their countries energy demands. The reasons behind this are many, ranging from reducing emissions to the safety of nuclear reactors and waste. For countries lying on or near fault lines, such as Taiwan, the latter becomes an even greater concern. When the earth shakes nuclear power plants, in particular, are highly sensitive and susceptible pieces of infrastructure. To avoid potential catastrophe and achieve greener energy sources the current government in Taiwan is aiming to phase out nuclear power in the coming years and they have chosen wind power as the technology to replace a large portion of the energy supply.<br/> In Taiwan the plan to phase of nuclear power and replace it with wind power has one extra challenge. The plan is not to build on land, like the majority of wind turbine projects, but rather to head out to sea. Offshore wind farms (OWF) are becoming a larger part of the wind power market and European countries have mostly been the early adopters. The waters off Taiwan, in the Taiwan Strait, are attractive for offshore wind farming development due to the favourable wind patterns that occur there. This has drawn major interest from European companies and others around the world to place bids on the growing number of wind farming projects. However, before any of these projects can take place an extensive effort to understand more about the environments below the surface must first be completed.<br/>Fortunately for those individuals who are curious as to the make-up and appearance of the ocean floor, such as engineers who plan to construct permanent structures in the depths, many techniques to map the seabed have been developed. Dr Gwo-Shyh Song, from The Institute of Oceanography at The National Taiwan University, in Taipei, is one local researcher who is very familiar with these methods. "I have been working on seafloor mapping around the Taiwan Island for last 20 years," points out Song. "This includes geophysical surveys, reservoir siltation surveys, cable and pipeline route surveys using a variety of techniques like multi-beam sounders and side-scan sonar as well as chirp sub-bottom profilers." When the offshore wind farming initiative needed experienced local researchers, he was one of a few people with the prerequisite expertise and technical skill required. "In 2012, when the OWF project was set into action and promoted by the Taiwanese Government, myself and my graduated students now employed within Global Aqua Survey Ltd started to become involved with many related investigatory projects," he explains.

scholarly journals Design and simulation of Lidar based control system for wind turbine

2021 ◽  
Vol 12 (1) ◽  
pp. 542
Author(s):  
Atif Iqbal ◽  
Deng Ying ◽  
Faheem Akhter ◽  
Manoj Kumar Panjwani ◽  
Danish Khan
Keyword(s):  
Renewable Energy ◽  
Control System ◽  
Wind Energy ◽  
Simulation Model ◽  
Wind Turbine ◽  
Energy Requirement ◽  
Renewable Energy Sources ◽  
Horizontal Axis Wind Turbine ◽  
Wind Lidar ◽  
Feedback Method

Renewable energy sources could be the main contributor to fulfilling the world’s energy requirement. Wind energy is grabbing the world’s attention due to its abundant nature and reliability. Wind energy is a prominent renewable energy source due to its availability and higher reliability. Despite the aforementioned benefits, there are some challenges such as wind measurement and prediction due to the turbulent nature of the wind. Lidar (light detection and ranging) technology is used in wind turbines to preview the wind and act it accordingly. Wind speed along with the direction is measured by the Lidar before it reaches the wind turbine plane and the control system of the wind turbine utilizes this data for optimal results. It enhances the control system along with it optimizes the output power. This paper presents the Lidar simulation model, which previews the wind earlier than the conventional feedback method. The Lidar simulation model is prepared and implemented on the horizontal axis wind turbine. The simulation is performed in GH Bladed at a 2.0 MW wind turbine. The output results are analyzed with the former method. The power extracted, pitch angle, rotor torque obtained from the proposed methodology proves its efficacy.

scholarly journals Development of Renewable Energy in Lithuania: Experience, State and Trends

2021 ◽  
Vol 77 (4) ◽  
pp. 64-72
Author(s):  
Giedrius Gecevičius ◽  
Žydrūnas Kavaliauskas
Keyword(s):  
Climate Change ◽  
Renewable Energy ◽  
Wind Energy ◽  
Energy Dependence ◽  
Renewable Energy Sources ◽  
Electricity Consumption ◽  
Offshore Wind ◽  
Energy Sources ◽  
Small Scale ◽  
The World

In recent decades, the growing number of citizens and improving life quality have increased energy consumption in the world and Europe, as well as in Lithuania. Despite the fact that an increasing number of countries are focusing on the development of renewable energy, most of the energy is produced by using fossil fuels. As a result, climate change is being felt more than ever before. One of the ways to mitigate climate change is the development of renewable energy sources in the world, Europe and Lithuania. Last year, Lithuania produced 5,142 TWh of electricity, which accounted for 47% of the country’s total electricity consumption, and 22.2% of all electricity consumption was generated using renewable energy sources. According to the Lithuanian National Energy Independence Strategy, 70% of electricity will have to be produced in Lithuania by 2030, reaching 100% by 2050. However, electricity imports and resulting energy dependence are still a major challenge in Lithuania. To address the ambitious goals of eliminating energy dependence and developing climate-neutral technologies, the last decade has seen the focus on the development of renewable energy, and wind energy in particular. Forecasts for the future suggest that by the middle of the century, the country will be producing electricity mainly from renewable sources including onshore and offshore wind energy, large- and small-scale solar energy, and bioenergy systems.

Wind Power: History, State, and Prospects

Vestnik MEI ◽  
2020 ◽  
Vol 5 (5) ◽  
pp. 11-26
Author(s):  
Eduard M. Perminov ◽  
Keyword(s):  
Renewable Energy ◽  
Wind Energy ◽  
Wind Power ◽  
Power Supply ◽  
Electricity Market ◽  
Large Scale ◽  
Renewable Energy Sources ◽  
Power Industry ◽  
Instrument Making ◽  
The World

Many countries around the world began to actively develop renewable energy after the energy crisis of the mid 1970s, when commercial technologies for its use emerged, and nowadays, progress in this field develops much more rapidly than it was expected a decade ago. Modern technologies of using renewable energy sources (RES) are attractive owing to their advantages: they are widely available and inexhaustible; they feature smaller pollution of the environment; their use helps save traditional nonrenewable fossil energy resources; they involve the use of modern high technologies; in addition, they help create new skilled jobs. Russia, despite its large reserves of oil, gas, and coal, is also interested in using RES as an important means of diversifying the country's fuel and energy balance, energy saving, and improving energy security and efficiency with centralized and decentralized supply of power to all regions of the country. This is especially important for regions that face big problems with ensuring reliable and high-quality supply of power. One of the most important areas of renewable energy is wind energy; according to different estimates, it can provide up to 50% or more of the future energy consumption. An attempt is made to estimate the history, state, and prospects for development of the world and domestic wind power industry. The development stages and the role of domestic and industry science, and also the possibilities of the domestic production facilities and ways of improving it are shown. In the course of restructuring and reorganizing the domestic economy, research and development structures, the domestic industry constructing power machinery and equipment, radio electronics, instrument making, and other industries that form the basis for RES and, in particular, wind power, were destroyed to a significant extent. The potential of wind energy, as well as that of other RES that are "not traditional" for the Russian energy sector, has not been fully employed as yet, although in principle, they can solve many energy problems. This is also due to the fact that the current price level in the wholesale electricity market is lower than the net cost of electricity generated by means of RES. This is especially important in solving matters concerned with arrangement of decentralized power supply in Russia, with its vast territory, poorly developed infrastructure, and the world's harshest climate, in which, according to various estimates, from 50 to 70% of the territory is not covered by reliable guaranteed power supply. The problems of successful and efficient development of RES, including wind energy, should become the most important issues already in the near future, and it should be noted that positive steps in this direction have been taken in recent years. At the same time, it should be understood that RES are not an alternative to the "traditional large-scale" power industry, but rather complement it, occupying its own very specific niche.

A novel hybrid metaheuristic optimization method to estimate medium-term output power for horizontal axis wind turbine

2019 ◽  
Vol 233 (5) ◽  
pp. 646-658 ◽  
Author(s):  
Firat Ekinci ◽  
Tugce Demirdelen ◽  
Inayet Ozge Aksu ◽  
Kemal Aygul ◽  
Burak Esenboga ◽  
...  
Keyword(s):  
Wind Speed ◽  
Wind Energy ◽  
Wind Power ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Clean Energy ◽  
Optimization Method ◽  
Energy Sources ◽  
Medium Term ◽  
Horizontal Axis Wind Turbine

The increasing damage caused by fossil fuels has made it a necessity for new and clean energy sources. In recent years, the use of wind energy from renewable energy sources has increased, which is a new and clean energy source. Wind energy is everywhere in nature. The wind speed changes depending on time. Thus, the wind power is unstable. In order to keep this disadvantage at a minimum level, future power estimation studies have been carried out. In these studies, different methods and algorithms are applied to estimate short and medium term in wind power. In this study, artificial neural network, particle swarm optimization and firefly algorithm (FA) as a new method are used for the first time in predicting wind power. As input data, temperature, wind speed and rotor speed the data recorded in the SCADA in wind turbines are used to predict medium-term wind speed and also wind power. Each method is compared in detail and their performances are revealed.

scholarly journals Kaji Eksperimen lengkungan Sudu Turbin Angin Savonius Tipe-U

2019 ◽  
Vol 14 (2) ◽  
pp. 8
Author(s):  
Delffika Canra ◽  
Meri Rahmi ◽  
Ikhsan -
Keyword(s):  
Renewable Energy ◽  
Aspect Ratio ◽  
Wind Energy ◽  
Wind Turbine ◽  
Cross Section ◽  
Renewable Energy Sources ◽  
Electrical Power ◽  
Energy Sources ◽  
Renewable Energy Resources ◽  
Turbine Construction

Wind energy sources in coastal areas of Indonesia are generally one of the potential renewable energy sources (renewable energy resources) that are abundant, environmentally friendly and renewable. Savonius wind turbines can produce relatively high torque even at low wind speeds. Because it is very well developed to produce electrical energy. To get a large amount of electrical power, a large turbine construction is also needed which also requires a large amount of money, of course. For this reason, the dimensions of this wind turbine construction need to be developed, known as aspect ratio (Ar). Ar which has been studied is the cross section of the blade, as well as other values. Whereas the arch depth or blade length of type U is still likely to be studied. Therefore it is necessary to do research on type U blade arcs to get more power than before. Experimental method by making a prototype savonius type U wind turbine with 2 blades. The parameters varied only in terms of the ratio of arc length and blade cross section, other parameters followed the previous study. The expected experimental results get the aspect ratio (Ar) of the best blade in capturing wind energy and producing large electrical power.

scholarly journals Wind Energy in India: Current Status and Potential

2018 ◽  
Vol 3 (2) ◽  
pp. 41-46
Author(s):  
Prem Prakash ◽  
Keyword(s):  
Renewable Energy ◽  
Wind Energy ◽  
Wind Power ◽  
Renewable Energy Sources ◽  
Wind Farms ◽  
Current Status ◽  
Energy Sources ◽  
Policy Interventions ◽  
Growing Economy ◽  
Energy Options

Wind energy sources and technologies have the potential to provide solutions to the long-standing energy problems being faced by developing countries. Renewable energy sources like wind energy can be used to overcome energy shortages in India. To meet the energy required for such a fast-growing economy, India will require an assured supply of 3–4 times more energy than the total energy consumed today. Renewable energy is one of the options to meet this requirement. In this paper, efforts have been made to summarize the availability, current status of wind energy, wind power potential, wind power growth, repowering wind farms in India, and future potentials of renewable energy options in India. This paper also discusses the wind real contribution to the electricity demand of India and aspects for the improvement of wind technology. This paper also assesses specific policy interventions for overcoming the barriers and enhancing the deployment of renewable for the future.

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