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Öğe Basic Parameter Extraction From An Organic Solar Cell Through The Single Diode Model And A Metaheuristic Technique With The Lambert W Function(Ieee, 2014) Tutkun, Nedim; Elibol, Erdem; Maden, DinçerRecently solar power has increasingly been used to generate electricity worldwide through photovoltaic (PV) systems. The electrical performance of each PV module plays major role in maximum power transfer. In order to absorb the maximum power from such systems, optimal output voltage and current should be obtained from the I-V characteristics of previously developed models. It is fact that, this is a relatively uneasy task because manufacturer's data sheet is confined to limited number of measured values. In this study, the hybrid genetic algorithms method is employed to extract basic parameters of the ideality factor and the parasitic resistances in the single diode model to transfer maximum power from a PV module to a resistive electrical load. Optimal parameters in the circuital model are found using the I-V characteristic of a silicon diode expressed by the Lambert W function. The results are meaningful and encouraging for maximum power transfer under certain conditions.Öğe Determination of the PID controller parameters for speed and position control of DC motor using gravitational search algorithm(2011) Duman, Serhat; Maden, Dinçer; Güvenç, UğurIn this paper we use a new search heuristic called Gravitational Search Algorithm (GSA) to determination of the optimal PID controller parameters in the speed and position control of a DC motor. The model of a DC motor is considered as second and third order system. Mean squared error (MSE) performance index has been used as objective function. End of the optimization process, the rise and the settling times and the overshoot are compared to those reported in the literature. To show that effectiveness of proposed method are compared with Ziegler-Nichols method in speed control of DC motor. Simulation results show the effectiveness and robustness of proposed controllers to provide the speed and position control of DC motor. © 2011 Chamber of Turkish Electric.Öğe Investigation of the best placement for voltage stability by STATCOM(2011) Doğan, Metin; Döşoğlu, M. Kenan; Maden, Dinçer; Tosun, Salih; Öztürk, AliThe study is related to the identification of optimal point for Static Synchronous Compensator (STATCOM) for static voltage stability. The study undertaken in IEEE 14 buses systems utilized analysis for relationships in voltage maximum loading parameters of STATCOM placed between lines and analysis for change in the bus voltage. Maximum loading parameter values obtained for each line and the improvements in weak buses that provided the best results were given in tables and figures. The results of the study show that STATCOM improves the voltage instability cases that can occur in optimal place selection. © 2011 Chamber of Turkish Electric.Öğe Manyetik askılama sistemi için 2 serbestlik dereceli PID kontrolcü tasarımı(2018) Maden, Dinçer; Yazıcı, İrfanBu çalışmada, açık çevrim, kararsız ve lineer olmayan ikinci dereceden bir yapıda olduğu için bir birçok kontrol problemine konu olan manyetik top askılama sistemine uygun 2 Serbestlik Dereceli PID kontrolcüsü tasarlanmış ve geleneksel PID kontrolcüsüyle kıyaslanmıştır. Sistem fiziksel parametreler baz alınarak modellenmiş ve uygun birer denge noktası civarında Tylor serisine açılarak lineerleştirilmiştir. PID kontrol parametreleri, ikinci dereceden sistemler için uygun bir yöntem olan kök yerleştirme metoduyla belirlenmiş ve aynı parametreler 2 serbestlik dereceli PID için de kullanılmıştır. Önerilen bu kontrol algoritması ileri yol kazanç parametrelerine sahip olduğu için geleneksel PID kontrolcüsüne göre geçici hal performansının daha da iyileştirilmesi mümkün olmaktadır. Geleneksel kontrolcüden kaynaklanan sisteme ait transfer fonksiyonundaki sıfırların sebep olduğu aşımların önüne geçilmiştir.Öğe Performance Comparison of Discrete Time Sliding Mode Control Techniques for Magnetic Levitation System(Ieee, 2017) Maden, Dinçer; Yazıcı, İrfanIn this study, the control of magnetic levitation system in discrete time domain is considered. Magnetic ball levitation system model is identified, linearized near the equilibrium point and discretized in convenient sampling period. Discrete time sliding mode controller with enhanced exponential reaching law is designed and compared to traditional discrete time constant proportional rate reaching law for the magnetic ball levitation system which is subject to many control problems since it has unstable structure and it has nonlinear dynamics. The asymptotically stability of the system is analyzed by using Lyapunov stability condition with discrete time approach. In order to evaluate the performance of the considered control technique, simulations are conducted and the results show that discrete time enhanced exponential reaching law provides better performance in terms of both reference tracking and disturbance noise rejection as compared to conventional constant proportional rate reaching law techniques.Öğe Robust and Simple Yaw Controller Design for a Low Power Wind Turbine through the Shuffled Frog Leaping Algorithm(Ieee, 2014) Tutkun, Nedim; Maden, Dinçer; Elibol, ErdemRecently low power wind turbines have been attracted great attention to generate electricity in remote areas due to considerable increase in conventional energy cost. Among those sources, wind energy is the most prominent and is used in many places where low power wind turbines are highly applicable. Unfortunately, most of these turbines have a mechanical yaw controller with the wind tail rather than electronically designed controller due to increased total cost. However, this affects the efficiency of the wind turbine more than expected as well as its performance. In this investigation, a low cost yaw controller for a 2 kW horizontal axis wind turbine was designed by a simple and software implementation. The results show that the approach produced encouraging and meaningful outcomes to increase electricity generation through the fully controlled small wind turbine by avoiding turbulence effect on it.Öğe Squirrel search algorithm applied to effective estimation of solar PV model parameters: a real-world practice(Springer Science and Business Media Deutschland GmbH, 2023) Maden, Dinçer; Çelik, Emre; Houssein, Essam H.; Sharma, GulshanModel parameters estimation of solar photovoltaic (PV) cells/modules using real current–voltage (I–V) data is a critical task for the performance of PV systems. Therefore, there is a necessity to procure optimal parameters of PV models using proper optimization techniques. For this aim, squirrel search algorithm (SSA) as the recent and powerful tool is employed to accomplish the mentioned task in the single-diode model (SDM) and double-diode model (DDM) of a PV unit. Of course, better parameter values can be obtained by reducing the error between the experimental and model-based estimated data. Analyses are performed under two case studies. The former considers a standard dataset of R.T.C. France silicon solar cell, whereas the latter uses an experimental dataset of a polycrystalline CS6P-220P solar module. The I-V data of this PV module were acquired when it worked under 30 °C and solar radiance of 1000W/m2 at the Engineering Faculty Campus of Düzce University, Turkey. The results of the first case study are compared with those of other prevalent approaches, which demonstrate the superiority of SSA over its competing peers. Moreover, SSA is found to handle the model parameters definition of an industrial PV module located at the university campus. Thus, the new method offers a practical tool beneficial to boost the effectiveness of PV systems. © 2023, The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature.
