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A case study on the investigation of solar regime in Van, Turkey

Genc, Naci; Colak, Medine; Yeşilbudak, Mehmet (2015)

The electricity generation from solar energy is one of the crucial ways for sustainable growth and it is exploited through solar photovoltaic or solar thermal routes for different purposes. However, solar characteristics ...
A data mining approach: Analyzing wind speed and insolation period data in Turkey for installations of wind and solar power plants

Colak, Ilhami; Sagiroglu, Seref; Demirtas, Mehmet; Yeşilbudak, Mehmet (2013)

Wind and solar power plant installations have been recently increased rapidly with respect to the depletion of fossil-based fuels all over the world. Due to stochastic nature of meteorological conditions, wind and solar ...
A new approach to very short term wind speed prediction using k-nearest neighbor classification

Sagiroglu, Seref; Colak, Ilhami; Yeşilbudak, Mehmet (2013)

Wind energy is an inexhaustible energy source and wind power production has been growing rapidly in recent years. However, wind power has a non-schedulable nature due to wind speed variations. Hence, wind speed prediction ...
A novel application of Naïve Bayes classifier in photovoltaic energy prediction

Bayindir, Ramazan; Colak, Medine; Genc, Naci; Yeşilbudak, Mehmet (2017)

Solar energy is one of the most affordable and clean renewable energy source in the world. Hence, the solar energy prediction is an inevitable requirement in order to get the maximum solar energy during the day time and ...
A novel implementation of kNN classifier based on multi-tupled meteorological input data for wind power prediction

Sagiroglu, Seref; Colak, Ilhami; Yeşilbudak, Mehmet (2017)

With the growing share of wind power production in the electric power grids, many critical challenges to the grid operators have been emerged in terms of the power balance, power quality, voltage support, frequency stability, ...
A novel intelligent approach for yaw position forecasting in wind energy systems

Sagiroglu, Seref; Colak, Ilhami; Yeşilbudak, Mehmet (2015)

Yaw control systems orientate the rotor of a wind turbine into the wind direction, optimize the wind power generated by wind turbines and alleviate the mechanical stresses on a wind turbine. Regarding the advantages of yaw ...
A novel intelligent decision support tool for average wind speed clustering

Colak, Ilhami; Kabalci, Ersan; Kahraman, Hamdi Tolga; Yeşilbudak, Mehmet (2011)

The utilization ratio of wind energy, which is one of the renewable energy sources, is increased around 25% since last 15 years. However, the parameters such as performance of wind turbines and climate features are not ...
A novel power curve modeling framework for wind turbines

Yeşilbudak, Mehmet (2019)

This paper presents two main novelties concerning power curve modeling of wind turbines. First novelty lies in the hybridization of 5 widely-used parametric functions and 8 recently-developed metaheuristic optimization ...
A review of data mining and solar power prediction

Colak, Medine; Bayindir, Ramazan; Yeşilbudak, Mehmet (2016)

Solar energy is one of the clean and renewable energy sources that are mostly available in the world. As a result of this situation, there are many research studies done on the solar energy in order to get the maximum solar ...
A survey on the critical issues in smart grid technologies

Colak, Ilhami; Sagiroglu, Seref; Fulli, Gianluca; Covrig, Catalin-Felix; Yeşilbudak, Mehmet (2016)

The hierarchical and the centrally-controlled grid topology of existing electrical power systems has remained unchanged over the 20th century. On the other hand, there is a rapid increase in the cost of fossil fuels coupled ...
A wind speed forecasting approach based on 2-dimensional input space

Sagiroglu, Seref; Colak, Ilhami; Yeşilbudak, Mehmet (2012)

Wind speed forecasting is required for ensuring an efficient utilization of the wind power generated by wind turbines. This paper purposes the short-term wind speed forecasting in a 2-dimesional input space using the ...
An agglomerative hierarchical clustering tool for renewable energy sources

Colak, Ilhami; Kabalci, Ersan; Bulbul, Halil Ibrahim; Yeşilbudak, Mehmet (2011)

The wind power based energy generation technologies are intensively studied in renewable energy generation issues since last century. The main demands directed to a renewable energy source are being reliable, sustainable ...
An intelligent approach for speed stability analysis of a travelling wave ultrasonic motor based on genetic k-NN algorithm

Colak, Ilhami; Sagiroglu, Seref; Kahraman, Hamdi Tolga; Yeşilbudak, Mehmet (2011)

Driving voltage, driving frequency, phase difference and operating temperature are the parameters which affect the speed stability of a travelling wave ultrasonic motor (TWUSM). The weight coefficients of these parameters ...
An intelligent decision support tool for a travelling wave ultrasonic motor based on k-nearest neighbor algorithm

Colak, Ilhami; Sagiroglu, Seref; Kahraman, Hamdi Tolga; Yeşilbudak, Mehmet (2011)

Driving frequency, amplitude and phase difference of two-phase sinusoidal voltages are the input parameters which have influence on speed stability of travelling wave ultrasonic motors (TWUSMs).These parameters are also ...
Ankara ilinin uzun dönem global güneş ışınım şiddeti, güneşlenme süresi ve hava sıcaklığı verilerinin analizi ve eğri uydurma metotlarıyla modellenmesi

Yeşilbudak, Mehmet; Çolak, Medine; Bayındır, Ramazan (2018)

Güvenli, çevre dostu ve sürdürülebilir olan fotovoltaik enerji sistemlerinin kurulumlarında solar parametreler hakkındaki bilgiler önemlidir. Bu çalışmada, öncelikle, Ankara ilinin uzun dönem global güneş ışınım şiddeti, ...
Clustering analysis of multidimensional wind speed data using k-means approach

Yeşilbudak, Mehmet (2016)

The energy capability of wind power plants is strictly correlated with the wind characteristics of the considered site. For this reason, it is very important to process the wind speed data for making the wind power more ...
Daily photovoltaic power prediction enhanced by hybrid GWO-MLP, ALO-MLP and WOA-MLP models using meteorological information

Colak, Medine; Yesilbudak, Mehmet; Bayindir, Ramazan (2020)

Solar energy is a safe, clean, environmentally-friendly and renewable energy source without any carbon emissions to the atmosphere. Therefore, there are many studies in the field of solar energy in order to obtain the ...
Data mining and wind power prediction: A literature review

Colak, Ilhami; Sagiroglu, Seref; Yeşilbudak, Mehmet (2012)

Wind power generated by wind turbines has a non-schedulable nature due to the stochastic nature of meteorological conditions. Hence, wind power predictions are required for few seconds to one week ahead in turbine control, ...
Decision tree classification of daily total photovoltaic energy generation data considering meteorological conditions

Ayedi, Faten; Colak, Ilhami; Genc, Naci; Yeşilbudak, Mehmet (2019)

With the increasing penetration rate of photovoltaic systems in the power grid, there has been a remarkable interest in photovoltaic power prediction. Since, accurate predictions handle the volatile characteristics of solar ...
Design and simulation of a drive system for speed control of travelling wave ultrasonic moto

Colak, Ilhami; Demirtas, Mehmet; Bayindir, Ramazan; Yeşilbudak, Mehmet (2010)

This paper presents a low cost, user friendly and effective drive system for the speed control of travelling wave ultrasonic motor (TWUSM). Driving frequency and voltage were used as control inputs in the speed control. ...