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In this study, a new short term wind speed fore-casting approach, which uses long term past observations, is proposed. The performance assessment of the wind speed forecasting framework is carried out using real data from meteorological stations in Marmara region of Turkey. The data sets are not complete due to equipment failures. The proposed approach builds on data de-trending, covariance-factorization...
Power production of a wind turbine system is strongly dependent on both the wind regime at the site and the operating parameters of the wind turbine (design parameters). In order to evaluate the performance of a wind turbine in a given location, an accurate estimation of the turbine's Capacity Factor (CF) is required. This parameter shows the degree of match between the characteristics of the turbine...
Traditional Savonius wind turbine has advantages such as simple structure, fast start-up, etc., however, it also has significant disadvantages of low wind energy utilization efficiency. A novel wind turbine is proposed by improving structure of Savonius wind turbine in order to increase the low wind energy utilization efficiency. To compare performance of the novel wind turbine and the Savonius wind...
Hybrid renewable distributed generation systems are a potential solution to both South Africa's high greenhouse gas emissions and aspirations for universal electrification for remote rural communities. Indigenous resources such biomass, solar and wind are widely available in the country which can preferably be harnessed to supply energy to these communities by implementing hybrid renewable energy...
Solar and wind are the most promising among the renewable energy sources. The objective of this paper is to investigate the optimal techno-economically feasible model to mitigate a large scale demand in decentralized scenario. Solar, and wind energy potential in a hybrid scenario is closely assessed with an intermittent support from diesel generator and battery banks. Based on the general usage of...
The purpose of this paper is to present the LPV affine modeling of a Wind Energy Conversion System driven DFIG. It also deals with the analysis and the simulation of the established model. For that, starting from the system's electrical equations, we demonstrate the obtaining of the uncertain state space model of the DFIG. Then, we define a method that allows giving directly the variation range of...
It will be argued that there are major social gaps in the planning of complex energy infrastructure for public spaces: the first "gap" concerns the question if social acceptance can be reliably measured. The second “gap” refers to the lack of an integration of results from acceptance research into current planning procedures. Taking wind farm planning as an example, both social gaps are...
Wind energy is beneficial both economically and environmentally, while its utilization levels are still far from satisfactory and has plenty of room to be improved. One way to achieve this is to make use of the heat storage in some of the thermal generators to obtain fast ramping capabilities, so that they can catch up with the fluctuating and intermittent wind energy. Output characteristics of such...
The increased penetration of renewables in the power generation mix increases the uncertainty and variability in power system scheduling and operation. Variability and uncertainty are met in different volumes and in different time scales. To face these challenges, system operators schedule increased reserves and use unit commitment models with sub-hourly intervals. The authors have presented in recent...
In the presence of renewable energy resources in the power system, most grid management applications make use of hourly or even minutely models for solar irradiance and wind speed. However, studies on the grid impact and controllability of these resources sometimes require focusing on shorter duration timeframes, namely secondly to minutely models. Detailed studies on power and voltage quality impacts,...
In this study, the wind energy potential for the purpose of electricity generation in Jarandagh, Iran was investigated. The measured wind speed data collected between 2008 and 2009 at 40 m is utilized to analyze the wind energy potential and wind characteristics at 40 and 70m. According to the obtained results the annual mean wind speed at the heights of 40 and 70 were 7.74m/s and 8.73 m/s, respectively...
The present paper details a complex simulation program designed in MATLAB/SIMULINK aiming at the analysis of a complete grid-connected wind energy conversion system. The model contains the wind turbine, a permanent-magnet synchronous generator, a back-to-back electronic power converter, and the grid, as load for the electric energy production unit. Also, the maximum-power-point-tracking strategy is...
The purpose of this paper is to study the influence of harmonics generated by a rectifier and a DC/DC converter on a robust and low-cost structure generator connected to an isolated load for wind applications. The machine used to convert mechanical power into electric power is a hybrid excitation synchronous generator (HESG). In this machine, the excitation flux is created by both permanent magnets...
In this study we will develop a model permitting to evaluate the impact of renewable energy installation on environmental, social and economic levels. We will apply the structural theory of thermo economic and we will use the thermodynamic process of cost formation. With the set of equations presented we can give a rational cost assessment of the impact of every component of the renewable energy installation...
This paper highlights the key results from the Renewable Electricity (RE) Futures Study. It is a detailed consideration of renewable electricity in the United States. The paper focuses on technical issues related to the operability of the U.S. electricity grid and provides initial answers to important questions about the integration of high penetrations of renewable electricity technologies from a...
The generation potential of renewable energy sources and their time profile of production depends on geographic characteristics. Furthermore, the integration of renewable energy technologies into the energy system is constrained by existing distribution infrastructure. The paper does a preliminary assessment on how the availability of spatially and temporally highly resolved data on resource potentials...
Short circuit and ground failures that are quite common in power transmission lines are investigated. These failures are designed considering a system that is supplied by this wind system, analysis are interpreted. In the study, a system is set up and it is fed by the wind turbine. Furthermore, the mathematical model of wind turbine and generator is prepared and the results obtained from the simulation...
This paper covers the analysis methods and results of the increasing wind integration impacts on the Baltic region's electricity market participants and power plant economics. The scope of the study is 2025 - when mayor decrease in generation capacities has occurred. The final part of the paper addresses the key findings that large scale wind integration might have on the economics of different generation...
OffshoreGrid is the first techno-economic study that carries out an in-depth analysis of how to build a cost-efficient grid in the North and Baltic Sea. The project investigated the most beneficial wind farm connection concepts for 126 GW in 321 offshore wind farms as expected for the year 2030. Based on this two highly efficient offshore grid designs were developed with modular building stones such...
In order to solve the problem of voltage stability existed in wind farms interconnected to power system, a computing method taking the statistical law of wind output power into account is proposed to determine the reactive power compensation capacity that is interconnected to power system. Based on the statistical law of wind power and considering the characteristics of reactive power and active power...
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