Ertuğrul Çam

Control of Pitch Angle of Wind Turbine by Fuzzy Pid Controller

AbstractThis article presents a study on set of PID parameters of blade pitch angle controller of wind turbine with fuzzy logic algorithm. Three individual control methods were used to control the wind turbine pitch angle. These control methods are conventional PI, fuzzy and fuzzy PID. With the use of these control methods, the system was protected from possible harms in high wind speed region and maintained changing of nominal output power. It was aimed to the control the wind turbine blade pitch angle in different wind speeds and to hold the output power stable in the set point by simulation of controllers with Matlab/Simulink Software. By evaluating the steady state time of output power received from the simulation results and steady state errors, the performances of the control systems have been measured and compared with one another. As a result of these simulation comparisons, it is clear that fuzzy PID controller performed better than PI and Fuzzy Controller.

Optimal Site Selection for a Solar Power Plant in the Central Anatolian Region of Turkey

Primary energy sources are running out due to the increase in electrical energy consumption. Environmental problems caused by primary energy sources are also increasing. Using more renewable energy resources (RES) can be considered as one of the most powerful solutions to address these problems. Today, required photovoltaic power systems (PVPS) and wind energy systems (WES) are widely used as RES for addressing these problems. Because of their high costs, feasibility studies are required for locating large systems associated with these resources. In this study, various suggestions are determined about location selection, which is an important stage in the PVPS’s establishment. Hence, the criteria for selecting the appropriate location are analyzed by the multicriteria decision making (MCDM) methods and the results are evaluated for 5 cities in the Central Anatolian Region of Turkey. In conclusion, it is determined which city is the most suitable place for installation of solar power plants.

APPLICATION OF AHP METHOD FOR SOLVING THE UNIT COMMITMENT PROBLEM IN A DAY AHEAD MARKET

The aim of unit commitment problem in power systems has been converted from cost minimization to profit maximization with the liberalization of power markets. The generation companies (GENCOs) schedule the units to maximize their profit for the forecasted prices in day ahead market (DAM). The generation scheduling of generators in deregulated environment is called as Profit Based Unit Commitment (PBUC). In this paper, an application of Analytic Hierarchy Process (AHP) is proposed to solve PBUC problem. The method is applied to 3-units power system. The results are compared with the methods in the literature. As shown in the study, the proposed AHP method introduces its applicability and efficiency for solving the unit commitment problem in a day ahead market.

Position Estimation with Fuzzy Logic Based Dead Reckoning for GPS-Denied Environment

T he importance of security precautions has been increased as a consequence of raised terrorist incidents. Terrorist acts that move into the city from country sides have made tracking of security and military personnel more important. GPS signals, densely utilized for this tracking, pose a problem in signal blockage situation and GPS-denied environments. The main goal of this research is that to develop a practical positioning system for walking military personnel in GPS denied environments. The system is very useful for GPS signal blockage environments, such as tunnels, thick-walled structures and dense high rise buildings, etc. Proposed system contains a 6-degree of freedom (DOF) inertial measurement unit (IMU) and digital compass attached to the military personnel’s shoe. Tri-axis accelerometer and gyroscope measurements are obtained by IMU. These measurements are applied to fuzzy logic algorithms and total displacement for each step is calculated. Digital compass is utilized to determine direction of personnel. Thus, current location has been estimated with the known starting point.

Laser Obstacle Sensor based System Design on Light Railway Systems

Gunumuzde yerlesim bolgelerindeki nufusun cok yogun oldugu yerlerde toplu ulasim araclari ve ozellikle demiryollari cok onemli hale gelmistir. Bu durum demiryollarindaki guvenlik onlemlerini de onemli hale getirmektedir. Bu baglamda calismada hafif rayli sistemlerdeki ulasimda onemli yere sahip olan kaza onleme ve sisteminin guvenli bir sekilde durdurulmasi uzerine calisilmistir. Hafif rayli sistemlerde ulasim sisteminde olusabilecek kaza tehditlerinin basinda tramvayin onune cikabilecek engellerin algilanmasi, bu durumun tren guvenlik sistemince tanimlanmasi ve gerekli guvenlik mekanizmasinin calistirilmasi gerceklestirilmistir. Tren raylari uzerine bilerek ya da bilmeyerek birakilan cisimler, guzergâh uzerinde yuruyen insanlar, trafikteki diger araclar algilanmakta ve gelistirilen yazilimla degerlendirilmektedir. Degerlendirme cisimlerin hiz, konum ve buyukluk olarak gozlemlenmesi ve carpma olasiligina karsi surucunun uyarilmasi devaminda fren mekanizmasinin devreye girmesi saglanmaktadir. Calisma bir proje1 cercevesinde gercek zamanli olarak Bursa’da Durmazlar Makine Sanayi A.Ş. tarafindan uretilmis bir tramvay icin gelistirilmis ve test araci olarak kullanilmistir. Calismada insan sagligina zararsiz sinif-1 lazer sinyaller ureten bir tarayici tramvay uzerinde kullanilarak yol guzergahindaki nesneleri tarama islemi yatay duzlemde ve iki boyutlu olarak gerceklestirilmistir. Tramvay guvenlik sistemine lazer tarayici sisteminin entegrasyonu ile tarama alani surucuye on panelde gorsel olarak sunulmus ve sistem, surucu uyarilari ve otomatik frenleme sistemiyle donatilmistir.