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This paper presents the development of forecast models for a wind farm producibility with a 24 hours horizon. The aim is to obtain accurate wind power predictions by using feedforward artificial neural networks. In particular, different forecasting models are developed and for each of them the best architecture is researched by means of sensitivity analysis, modifying the main parameters of the artificial...
This paper presents a method for primary evaluation of a wind farm based on the wind turbine Adaptability Coefficient. This coefficient is calculated according to economical criteria of wind turbines as well as their capability in power production through the site where the wind turbines will be installed. The data series of wind recorded from three different sites and characteristics of several types...
Performance of 2.25 MW wind farm at Devgarh in Pratapgarh district of Rajasthan was studied. Parameters of analysis were energy production, capacity factor, machine availability, grid availability, and system availability of three wind turbines installed at site. The data for year 2011, and 2012 of wind farm were used in calculations. The results of this study confirm that wind farm performance could...
Wind generation is the most increasing resource in the renewable energy. Now a days, the wind power has a large installed output power capacity in the world among the renewable energy sources. The wind power integration into power system grids has some effect on power system issues as transmission congestion, optimum power flow, system stability, power quality, system economics and load dispatch....
In this work the impact of wind power integration on the power system of Rio Grande do Sul (RS) is analyzed. The impact is analyzed in terms of power flow simulation considering minimum and maximum load conditions. Contingencies are also simulated and the consequence on the power flow is analyzed.
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...
A novel control method for tip speed ratios of the series connected wind turbines in a wind farm by controlling the field currents of the wind generators is proposed. It is confirmed that good agreements between experimental and simulation results are obtained, showing the usefulness of the proposed method of the simulation model. Also, it is shown that reactive power of the wind generators of this...
With the rapid increasing of the installed capacity of wind power, the difficulty of system frequency regulation is more apparent than ever for the volatility and randomicity of wind power. Therefore, this paper proposes one strategy of wind farm power regulation considering system frequency regulation demand. The corresponding control system is divided into three levels–wind energy management level,...
As the percentage of wind energy on the power grid increases, the intermittent nature of this energy source can make it difficult to keep the generation and the load balanced. While wind speed forecasts can be helpful, they can often be inaccurate. In such cases, we are interested in providing the control room operators additional relevant information they can exploit to make well informed scheduling...
Wind power generation is becoming increasingly common in the portfolio mix of many utilities around the world. Wind turbines are presently available up to 5MW. Smaller turbines may be installed for individual customers and connected to the grid at the distribution level, and larger units are typically combined in a wind “farms” connected to bulk power systems at the transmission level. Turbines ranging...
Battery energy storage system (BESS) is to be incorporated in a wind farm to achieve constant power dispatch. The design of the BESS is based on the forecasted wind speed, and the technique assumes the distribution of the error between the forecasted and actual wind speeds is Gaussian. It is then shown that although the error between the predicted and actual wind powers can be evaluated, it is non-Gaussian...
Renewable energy is increasingly being treated as a promising solution to the global warming and other environment issues. Due to the intermittent nature of these energy resources, energy storage is required to provide certain wind generation capacity. An analytical procedure is presented in this paper to analyze the impacts of energy storage on reliability of power systems with wind turbine generators...
With the development of wind power, the inherent characteristics of randomness and uncertainty of wind energy would have an impressive effect on power system frequency, it is necessary for wind farm to participate in frequency regulating in order to share the burden with the frequency-regulating power plants, and to improve power system stability. Two operation modes of the wind farm are proposed...
The aim of the paper is to study the optimal participation of wind energy in adjustment markets in order to increase the wind producer revenues, through a stochastic optimization process, which considers the uncertainty of the random variables involved, namely short-term wind power prediction, intraday price prediction and imbalance price. A new modeling of the behavior of up and down imbalance prices...
This paper reports on an overview of the current electricity situation in Namibia that renders it necessary for capacity expansion of electricity generation in order to meet the country's abounding electricity needs. A discussion of the efforts made by the Namibian national power utility, NamPower and the country's government will be presented in the paper, followed by an abbreviated review of on-going...
To effectively harness the power of wind electricity generation, significant infrastructure challenges exist. First, the individual wind turbines must be sited and constructed as part of a wind farm. Second, the wind farm must be connected to the electricity grid infrastructure and the power generated managed accordingly. Due to its stochastic nature, wind energy cannot be controlled; it must be managed...
An in-depth investigation of China's large-scale wind energy development is conducted in the paper. In order to cater for the trend of abating carbon emissions and improving energy efficiency, wind power industry is developing at an astonishing speed in China. The characteristics of China's LSWD are analyzed in the context of its basic national conditions of energy. The mode of long-distance, large...
An efficient hybrid distributed genetic algorithm is proposed to determine the proper number and locations of wind turbines in large wind farms. The objective of this optimal process is to find a solution that maximizes the annual profit obtained from a wind farm. It is well-known that genetic algorithms are good for global searches, but are weak for local searches. To improve the performance of finding...
Growing of wind power has resulted in a need for evaluation of its impact on power systems planning and operation. This paper analyzes the benefits of regulating wind power for power systems. A new unified index will be introduced to comprehensively evaluate the performance of the system with wind power at different possible locations, considering not only the benefits of loss reduction and voltage...
The Romanian National Energy strategy is requesting that renewables quota to reach 33% of consumption in 2010 and 38% in 2020. One of the most challenging issues facing wind energy today is its maximal and reliable integration in the power markets. Due to transport/distribution grid lack of flexibility and high level of concentration in Dobrogea region of large wind developments the access to the...
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