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Öğe A Golden Section Search Assisted Incremental Conductance MPPT Control for PV Fed Water Pump(Gazi Universitesi, 2022) Alrajoubi, H.; Oncu, S.One way to enhance the effectiveness of photovoltaic (PV) fed water pumping applications is to maximize the solar PV energy by using a suitable design with accurate and fast maximum power point tracking (MPPT). This paper presents a new hybrid MPPT method to improve speed response and efficiency. The method is designed to control a simple standalone PV water pumping system-based single-stage brushless DC (BLDC) motor. A DC-DC converter is eliminated to improve system efficiency and reduce cost. In addition, a two-mode hybrid MPPT algorithm that incorporates the golden-section search (GSS) techniquebased MPPT algorithm with incremental conductance (INC) is implemented to enhance the global efficiency of the system. The GSS optimization method handles the initial stages to converge the global peak and helps to increase the convergence rate. In contrast, the INC MPPT method achieves sufficient accuracy with lower oscillation towards the MPPT during the final stages. The designed system is modelled, examined, and compared using traditional techniques in MATLAB/Simulink to evaluate the MPPT efficiency of the model. The results confirm that the proposed MPPT algorithm can successfully drive a 1150W BLDC motor with high tracking efficiency and reliability. The PV energy is transferred to the pump via a voltage source inverter (VSI) using the MPPT algorithm with a proportional-integral (PI) controller. As a result, the MPPT efficiency reached over 99%. © 2022, International Journal of Renewable Energy Research. All Rights Reserved.Öğe An MPPT Controlled Three Phase PV Supplied Water Pumping System(Institute of Electrical and Electronics Engineers Inc., 2021) Esmeail, A.A.S.; Oncu, S.; Altin, N.The rapid adoption of renewable energy techniques in water pumping systems applications has increased the requirement for suitable design. This has resulted in countless studies in this field, and many designs were presented by several researchers. While some of these studies were focused on the photovoltaic (PV) pumping system structure, others were carried out on the control techniques either for maximum power point tracking (MPPT) of the PV array or the motor drive systems. In this study, a design of single-stage three-phase induction motor drive for PV supplied water pumping system with MPPT ability is proposed. The scalar V/f control is suggested to control three-phase induction motor speed with a three-phase voltage source inverter (VSI). The Perturb and Observe (PO) based MPPT algorithm is designed to track the maximum power point of the PV array under varying solar irradiation conditions. The proposed single-stage PV supplied water pumping system is modeled and tested for varying solar irradiance conditions by using MATLAB/Simulink. The results obtained from the simulation studies are compared with the same simulation model without MPPT algorithm, and the effectiveness of the proposed algorithm is presented. © 2021 IEEE.Öğe Power control of resonant converter MPPT by pulse density modulation(Institute of Electrical and Electronics Engineers Inc., 2017) Karafil, A.; Ozbay, H.; Oncu, S.This paper presents the simulation of series resonant converter system with proposed 32 pulse density modulation (PDM) patterns which transfer the electrical energy obtained from PV panels to load with high power density. Maximum power point tracking (MPPT) is achieved by deleting some control pulses. Therefore, zero current switching (ZCS) is achieved at 100 kHz resonant frequency. The average output power changes of series resonant converter are given according to the proposed 32 PDM patterns. Both the MPPT algorithm and the high frequency series resonant converter are controlled by TMS320F28335 DSP. In the 600 W PV system, soft switching condition is achieved by using the proposed 32 PDM technique. © 2017 EMO (Turkish Chamber of Electrical Enginners).Öğe PV Fed Water Pump System with Golden Section Search and Incremental Conductance Algorithms(Institute of Electrical and Electronics Engineers Inc., 2023) Alrajoubi, H.; Oncu, S.In this study, a novel hybrid maximum power point tracking (MPPT) algorithm is proposed for a photovoltaic (PV) fed brushless DC (BLDC) motor driven water pump. A proper design with accurate and fast MPPT is required to maximize the PV energy. In the proposed algorithm, the golden-section search (GSS) and incremental conductance (INC) based MPPT methods are used to acquire global efficiency through two loops. The GSS method quickly achieves the initial searching of the global peak, while the INC MPPT algorithm tracks the optimal power during the final loop. The algorithm model is tested under different irradiation using MATLAB/Simulink. Applying the algorithm and a proportional-integral (PI) controller yields that a voltage source inverter (VSI) transfers the optimal solar power to the pump. The BLDC motor is driven efficiently with more than 99% MPPT efficiency. © 2023 IEEE.Öğe Self-Oscillated Induction Heater for Absorption Cooler(Kaunas Univ Technology, 2013) Bal, G.; Oncu, S.; Ozbas, E.Self oscillated resonant inverters have the advantages of low cost and simplicity. DC-AC power conversion can be achieved without using special drivers. In this study, self oscillated half bridge series resonant inverter topology is designed and applied to induction heater as a boiler part of home type absorption cooler system. The designed system has rapid and stable heating/ cooling response compared to conventional resistance heated system. Self oscillated resonant inverter can achieve soft switching and maintain resonant tracking with simple and cheap drive circuit during all heating period.Öğe Solar Water Pumping System With Modified CSS-INC MPPT Algorithm(Institute of Electrical and Electronics Engineers Inc., 2023) Esmeail, A.A.S.; Oncu, S.; Altin, N.Photovoltaic water pumping systems is a practical alternative to traditional systems in remote areas. However, the efficiency of solar energy utilization heavily relies on the optimal design of the maximum power point tracking (MPPT) algorithm that can increase power extraction from PV panels. In this paper, a modified MPPT algorithm is proposed for driving a single-stage PV water pumping system with a three-phase induction motor (IM) driven by scalar V/f control technique. The proposed modified CSS-INC MPPT algorithm combines the benefits of two modes algorithm, the Confined Search Space (CSS) algorithm and the Incremental Conductance (INC) MPPT algorithm. The CSS algorithm is utilized to decrease the search area for the INC MPPT algorithm in tracking the maximum power point (MPP) of the P-V curve, resulting in improved and faster tracking capabilities. MATLAB simulation was conducted to evaluate the performance of the proposed CSS-INC MPPT algorithm, and the results were compared with the conventional INC MPPT algorithm under varying weather conditions. Simulation results demonstrated that the proposed modified MPPT algorithm achieves much better performance compared to the conventional INC MPPT algorithm where the modified MPPT algorithm can improve the efficiency and productivity of PV water pumping systems under varying weather conditions. © 2023 IEEE.
