scholarly journals Determination of energy characteristics of two-rotor wind power installation

2020 ◽  
Author(s):  
Vitaly Alekseenko ◽  
Yuri Gevora ◽  
Dmitry Sidelnikov ◽  
Alina Pluzhnikova
Keyword(s):  
Wind Power ◽  
Power Installation ◽  
Energy Characteristics ◽  
Wind Power Installation

Planning and Operation of Large Offshore Wind Farms in Areas with Limited Power Transfer Capacity

2012 ◽  
Vol 36 (1) ◽  
pp. 69-80 ◽  
Author(s):  
John Olav Giæver Tande ◽  
Magnus Korpås ◽  
Kjetil Uhlen
Keyword(s):  
Power System ◽  
Wind Power ◽  
Wind Farms ◽  
Power Installation ◽  
Offshore Wind ◽  
Rational Approach ◽  
System Operation ◽  
Offshore Wind Farms ◽  
Power System Operation ◽  
Wind Power Installation

At many locations with excellent wind conditions the wind farm development is hindered by grid issues. Conservative assumptions are often applied that unnecessarily limits the wind power installation. This paper shows that significantly more wind power can be allowed by taking proper account of the wind power characteristics and facilitating coordinated power system operation. A systematic approach is developed for assessing grid integration of wind farms subject to grid congestions. The method is applied to a case of connecting offshore wind farms to regional grid with hydro generation (380 MW) and loads (75–350 MW). The tie to the main grid is via a corridor with limited capacity (420 MW). With conservative assumptions (i.e. no changes in scheduled hydro generation or control of wind power output) the wind power installation is limited to 115 MW. The system operation is simulated on an hourly basis for multiple years taking into account the stochastic variations of wind speed and hydro inflow as well as the geographical distribution of wind farms. The simulation uses a control strategy for coordinated power system operation that maximises wind penetration. By using the developed methodology the wind power capacity can be increased from 115 MW to at least 600 MW with relatively little income reduction from energy sales compared to a case with unlimited grid capacity. It is concluded that coordinated operation allows for the integration of surprisingly large amounts of wind power. In order to realize the increase in transfer capability, it is essential to take account of the power system flexibility and the stochastic and dispersed nature of wind power. The presented methodology facilitates this and represents a rational approach for power system planning of wind farms.

scholarly journals Substantiation of adaptive self-adjusting system of autonomous wind power installation

2013 ◽  
Vol 4 (38) ◽  
Author(s):  
V. M. Sineglazov ◽  
V. V. Kozyrskyy ◽  
M. I. Trehub ◽  
О. S. Vasilenko
Keyword(s):  
Wind Power ◽  
Power Installation ◽  
Wind Power Installation

The Wave-Load Analysis of the Offshore Wind Power Installation Vessel Based on Frequency-Domain Methods

2011 ◽  
Vol 189-193 ◽  
pp. 1804-1808
Author(s):  
Ya Nan Zhao ◽  
Li Quan Wang ◽  
Hong Wang Du
Keyword(s):  
Spectral Analysis ◽  
Wind Power ◽  
Wave Theory ◽  
Wave Force ◽  
Power Installation ◽  
Offshore Wind ◽  
Wave Load ◽  
Offshore Wind Power ◽  
Wind Power Installation ◽  
Frequency Domain Methods

The wave force spectrum expressed in terms of Morison's equation was deduced by ocean wave theory and spectral analysis theory, and the spectral analysis of wave force were analyzed with the finite element method which was applied to the leg of the offshore wind power installation vessel, the natural frequencies and the vibration model were accomplished with boundary conditions. The dynamic response of the leg were studied in different conditions, it can be concluded that the wave force of the leg is only related with geometric shape and working depth of truss legs.

scholarly journals Optimum Control of Wind Power Installation

2018 ◽  
Vol 16 (3) ◽  
pp. 70
Author(s):  
V I Buyalsky ◽  
N M Shaytor ◽  
B A Yakimovich
Keyword(s):  
Wind Power ◽  
Power Installation ◽  
Optimum Control ◽  
Wind Power Installation

Решена задача по разработке принципа эффективного автоматизированного управления ветроэлектрической установкой, направленная на повышение стабильности частоты вращения ротора ветроколеса и уменьшение динамических нагрузок на основные элементы конструкции, что способствует улучшению показателей надежности электроснабжения основного управления в условиях неполной информации о характеристиках метеорологических и электроэнергетических условий, существенно изменяющихся во времени. Предложен метод управления процессом производства электроэнергии путем формирования угловой скорости ротора ветроколеса и угла положения лопасти на основе упреждения изменений скорости ветра и величины потребляемой электроэнергии, на малых промежутках времени (среднеквадратическая ошибка математического ожидания метеопараметра не превышает 4 %). Определение интервала времени, в течение которого осуществляется осреднение измеренных значений, производится с помощью учета хронологии характера изменения внешней среды, чтобы минимизировать время контроля выходных управляемых параметров, что дает возможность повысить стабильность частоты вращения ротора ветротурбины за счет уменьшения продолжительности переходного процесса в среднем в два раза. Рассмотрен принцип формирования комбинированного управления за счет согласованного взаимодействия со стороны основного и предложенного методов принятия управляющих решений на основе разграничения времени доступа к устройству изменения положения лопастей, который реализуется на каждом шаге в соответствии с алгоритмом выработки управляющих воздействий в зависимости от характера изменения внешних возмущающих воздействий. В качестве исходных данных для работы алгоритма выступают расчетные значения угловой скорости ротора ветроколеса на прогнозируемом отрезке времени, величина отклонения расчетного значения угловой скорости от номинального и знак отклонения. Если угловая скорость изменяется в большую сторону и при этом ее отклонение превосходит допустимое значение, то управляющие решения принимаются со стороны предложенного метода управления, в противном случае решения по выработке управляющих воздействий принимаются со стороны основного управления процессом поддержания номинального значения скорости вращения ветроколеса.

scholarly journals Renewable Energy Production from Agricultural Waste and Hydrogen Battery Formation

2021 ◽  
Vol 2 (4) ◽  
pp. 151-155
Author(s):  
Hengjinda P ◽  
Joy Iong Zong Chen
Keyword(s):  
Renewable Energy ◽  
Wind Power ◽  
Agricultural Development ◽  
Agricultural Waste ◽  
Electrical Energy ◽  
Power Installation ◽  
Electrical Grid ◽  
Initial Stage ◽  
Wind Power Installation ◽  
Heat Requirement

In recent years, the growth of solar and wind power installation has not grown in par with its electrical grid integration. Hence this proposed work uses frictional Pyrolysis to enable this integration by converting electrical energy into mechanical work without any indication of excess heat requirement. The renewable energy that is in excess can be used in conversion of agricultural residue to biocoal. This is the basis of of renewable battery. In this work a case study is presented such that biomass characteristics are examined and further transformed to bio coal. Observations indicate that in the past decade there is a significant increase in wind power installation (258%) and the number of solar PVs installed have also accounted for 21,437 GWh. From the biomass initial stage, the total amount of energy produced lies within the range 78% to 89%. This methodology of using renewable battery ensures that the environment state cleaner and carbon sequestration and also be implemented in agricultural development.

MODELING THE INFLUENCE OF PARASITIC RESISTANCE OF WIRES ON THE WORK OF A WIND POWER INSTALLATION

2019 ◽  
Author(s):  
Sergey Amelin ◽  
K. Kiselev
Keyword(s):  
Energy Efficiency ◽  
Wind Power ◽  
Power Installation ◽  
Optimal Input ◽  
Wind Generator ◽  
Parasitic Resistance ◽  
Wind Power Installation ◽  
Improved Model

A method for increasing the energy efficiency of a wind power installation based on obtaining the optimal input I–V characteristic of an intermediate DC-DC converter using an improved model of a wind generator that takes into account the resistance of current-carrying conductors is considered.

scholarly journals Self-generated power supply of agricultural enterprises based on renewable energy sources

2020 ◽  
Vol 175 ◽  
pp. 11009
Author(s):  
Nikolay Rudenko ◽  
Valery Ershov ◽  
Viacheslav Evstafev
Keyword(s):  
Renewable Energy ◽  
Wind Power ◽  
Power Supply ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Power Installation ◽  
Horizontal Wind ◽  
Energy Sources ◽  
Wind Power Plants ◽  
Wind Power Installation

The article contains the following technical proposals for the power supply of autonomous agricultural facilities using renewable energy sources: the use of hybrid solar-wind power plants, the use of vortex wind power plants with a vertical axis to use both the energy of horizontal wind flows and the energy of upward air flows. The structure and operation algorithm of an autonomous power supply system based on a hybrid solarwind power plant and a diesel generator for autonomous agricultural facilities of small and medium power in regions where there is no distribution electric network are proposed. This system will allow for insufficient wind load to ensure reliable power supply to an autonomous agricultural facility with minimal use of diesel fuel. The design of a vortex wind power installation has been developed. The fastening on the shaft of the wind power installation of a conical helical blade with a variable radius, decreasing in the direction from the lower to the upper cut of the socket, improves the efficiency of the installation. The proposed installation makes it possible to use small winds and low-potential thermal ascending air currents, reduce low-frequency vibration and noise, and also increase the stability and efficiency of use of wind energy.

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