Yazar "Bayindir, Kamil Cagatay" seçeneğine göre listele

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    DSP controlled voltage disturbance generator
    (Engineering & Scientific Research Groups, 2018) Savrun, Murat Mustafa; Tan, Adnan; Koroglu, Tahsin; Cuma, Mehmet Ugras; Bayindir, Kamil Cagatay; Tumay, Mehmet
    Voltage disturbance generator (VDG) is a kind of device used to generate voltage disturbances that may occur in the network in order to test and evaluate the performance of the power quality devices such as Dynamic Voltage Restorer (DVR) and Uninterruptible Power Supply (UPS). Some of the voltage disturbance generator systems which are available in the literature and commercially available are complex and expensive while the others are simple, inexpensive but less functional. In this paper, a new transformer based, digital signal processor (DSP) controlled VDG is designed which can generate balanced and unbalanced voltage sag/swell and interruption and can adjust the depth, duration and initiation point of disturbances. The proposed system is composed of bidirectional switches, variable transformers and DSP based controller. 3 phase 20 kVA experimental setup is developed to verify the performance of the designed system with linear and non-linear loads. Moreover, the performance of VDG is also investigated in the compensation tests of DVR and UPS.
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    Grid code requirements - A case study on the assessment for integration of offshore wind power plants in Turkey
    (Elsevier, 2022) Celik, Ozgur; Yalman, Yunus; Tan, Adnan; Bayindir, Kamil Cagatay; Cetinkaya, Uemit; Akdeniz, Mevlut; Chaudhary, Sanjay K.
    The increasing role of offshore wind power plants in the electricity generation mix in Turkey raises some critical grid operation issues. In this context, the grid code regulation concerning penetration of large-scale offshore wind power plants into Turkey's power system has become a prominent factor in the development of a reliable grid operation. In this paper, a comprehensive benchmark for grid codes of the European countries that have large-scale offshore wind power plants and Turkey is performed by considering voltage regulation, frequency regu-lation, fault ride-through, and power quality features. The compatibility of the grid codes in terms of the min-imum technical requirements is discussed to show the pros and cons. An elaborated assessment of the Turkish grid code reveals the technical properties that need to be improved. The rigorous state-of-the-art review indicates that active power control & frequency regulation, reactive power control & voltage regulation, and voltage ride-through capabilities should be clarified in detail for the Turkish grid code. With this background, various rec-ommendations, key challenges, and future trends related to the improvement of technical requirements for the Turkish grid code for the integration of offshore wind power plants are highlighted to help researchers, plant owners, and system operators.
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    Impacts of Large-Scale Offshore Wind Power Plants Integration on Turkish Power System
    (IEEE-Inst Electrical Electronics Engineers Inc, 2022) Yalman, Yunus; Celik, Ozgur; Tan, Adnan; Bayindir, Kamil Cagatay; Cetinkaya, Umit; Yesil, Merden; Akdeniz, Mevlut
    In this paper, the impacts of large-scale OWPPs penetration on the Turkish power system are addressed. The grid compliance analyses for the large-scale OWPP integration are carried out by using the grid connection criteria defined in the Turkish grid code. PV and QV curves are obtained to assess the effect of OWPP on the static voltage stability limit. Eight scenarios are conducted to analyze the effect of the OWPP on the static and dynamic characteristics of the power grid. To observe the large-scale OWPP impact on the voltage and frequency stability, transient events such as the outage of conventional power plants and three-phase to ground faults are applied. The results of the voltage and frequency stability analysis reveal that the Turkish grid remains stable after the integration of an 1800 MW OWPP. Furthermore, the Turkish system remains stable even in the event of an outage of the international transmission lines to Bulgaria and Greece.
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    Implementation of a Novel Hybrid UPQC Topology Endowed With an Isolated Bidirectional DC-DC Converter at DC link
    (IEEE-Inst Electrical Electronics Engineers Inc, 2020) Koroglu, Tahsin; Tan, Adnan; Savrun, Murat Mustafa; Cuma, Mehmet Ugras; Bayindir, Kamil Cagatay; Tumay, Mehmet
    This paper introduces an original hybrid unified power quality conditioner (HUPQC) topology as an alternative solution to electrical power quality problems. The proposed HUPQC consists of the shunt hybrid active power filter (SHAPF), the dynamic voltage restorer (DVR), and the isolated bidirectional dc-dc converter (BiDC) located at the common dc link. The SHAPF enables reduction in the voltage rating of the dc-link capacitor, helps to reduce the cost and the size of the dc link, and hence reduces switching losses of the voltage source inverter. Besides the novelty of its topology, dynamic reactive power compensation capability is realized for the first time in the literature within HUPQC concept by achieving adaptively controlling dc-link voltage. The BiDC not only provides isolation and bidirectional power flow between the DVR and the SHAPF but also operates to keep the dc-link voltage of DVR constant against adaptively changing dc-link voltage of the SHAPF. In addition to these, a new hybrid voltage sag/swell detection algorithm based on the combination of the improved Clarke transformation and the enhanced phase-locked loop is developed and introduced. In order to verify the viability and effectiveness of the proposed HUPQC topology, experimental studies are carried out.
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    Isolated H-bridge DC-DC converter integrated transformerless DVR for power quality improvement
    (Inst Engineering Technology-Iet, 2020) Savrun, Murat Mustafa; Koroglu, Tahsin; Tan, Adnan; Cuma, Mehmet Ugras; Bayindir, Kamil Cagatay; Tumay, Mehmet
    This study presents a new H-bridge DC-DC converter-based transformerless dynamic voltage restorer topology (DVR). The proposed system can compensate balanced and unbalanced voltage sag/swell that are the most common electrical power quality problems and offers advantages over conventional DVR topologies by providing the isolation with high-frequency transformer (HFT) rather than bulky injection transformers and by employing shunt converter to eliminate the requirement of an energy storage unit. The system is composed of H-bridge DC-DC converter equipped with a HFT with one primary and three secondary windings and transformerless DVR. The single-phase shift modulation method is used for each series converter independently to provide the bidirectional power flow control of DC-DC converter, whereas in-phase compensation method with a hybrid detection algorithm is used to mitigate voltage sag/swell. An LC filter is employed to attenuate the switching ripple harmonics on the output of the DVR. The performance of the proposed system is verified experimentally on a three-phase, three-wire, 380 V, 10 kVA prototype.
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    Multiple harmonic elimination-based feedback controller for Shunt Hybrid Active Power Filter
    (Inst Engineering Technology-Iet, 2017) Tan, Adnan; Bayindir, Kamil Cagatay; Cuma, Mehmet Ugras; Tumay, Mehmet
    This study presents a multiple harmonic elimination-based feedback controller for shunt hybrid active power filter (SHAPF) to perform an effective harmonic compensation performance in a wide harmonic frequency band. The conventional control methods presented for SHAPF cannot perform an adequate performance, because of the disturbances such as phase delays caused by controller methods and measurement circuitries, tolerances of passive filter components and supply voltage harmonics. In the proposed controller, the conventional feedback controller is improved by using supply side individual current harmonics which are extracted by the synchronous reference frame method. To prevent the performance degradation effects of disturbances, proportional-integral controllers are applied to each d and q components of individual current harmonics. The compensation performance of the proposed method is compared with conventional methods both theoretically and experimentally. The experimental results verify the advanced harmonic compensation performance of the proposed control method.
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    MVT Controlled Voltage Restorer for Fault-Ride Through Capability
    (IEEE, 2017) Inci, Mustafa; Buyuk, Mehmet; Tan, Adnan; Bayindir, Kamil Cagatay; Tumay, Mehmet
    Voltage dips are the most harmful disturbances which may affect the voltage stability of wind turbines. In these voltage dip conditions, stator/rotor currents and electrical torque increase to fairly high values with failing of voltage stability. In order to provide voltage stability after the faults of voltage dips, the faults must be compensated fast and accurately. The main contribution in this study is that missing voltage technique (MVT) based controller method is tested in dynamic voltage restorer (DVR) to mprove fault ride through (FRT) capability in grid connected wind systems. The proposed method controlled DVR is performed for symmetrical and asymmetrical faults in grid connected wind energy systems by using PSCAD/EMDTC power system simulator program. The case studies demonstrate the superior and effective compensation results.
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    MVT controlled voltage restorer for fault-ride through capability
    (Institute of Electrical and Electronics Engineers Inc., 2017) Inci, Mustafa; Buyuk, Mehmet; Tan, Adnan; Bayindir, Kamil Cagatay; Tumay, Mehmet
    Voltage dips are the most harmful disturbances which may affect the voltage stability of wind turbines. In these voltage dip conditions, stator/rotor currents and electrical torque increase to fairly high values with failing of voltage stability. In order to provide voltage stability after the faults of voltage dips, the faults must be compensated fast and accurately. The main contribution iin this study is that missing voltage technique (MVT) based controller method is tested in dynamic voltage restorer (DVR) to mprove fault ride through (FRT) capability in grid connected wind systems. The proposed method controlled DVR is performed for symmetrical and asymmetrical faults in grid connected wind energy systems by using PSCAD/EMDTC power system simulator program. The case studies demonstrate the superior and effective compensation results. © 2017 EMO (Turkish Chamber of Electrical Enginners).
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    Power System Integration of Electric Vehicles: A Review on Impacts and Contributions to the Smart Grid
    (Mdpi, 2024) Inci, Mustafa; Celik, Ozgur; Lashab, Abderezak; Bayindir, Kamil Cagatay; Vasquez, Juan C.; Guerrero, Josep M.
    In recent years, electric vehicles (EVs) have become increasingly popular, bringing about fundamental shifts in transportation to reduce greenhouse effects and accelerate progress toward decarbonization. The role of EVs has also experienced a paradigm shift for future energy networks as an active player in the form of vehicle-to-grid, grid-to-vehicle, and vehicle-to-vehicle technologies. EVs spend a significant part of the day parked and have a remarkable potential to contribute to energy sustainability as backup power units. In this way, EVs can be connected to the grid as stationary power units, providing a range of services to the power grid to increase its reliability and resilience. The available systems show that EVs can be used as alternative energy sources for various network systems like smart grids, microgrids, and virtual power plants besides transportation. While the grid-EV connection offers various contributions, it also has some limitations and effects. In this context, the current study highlights the power system impacts and key contributions of EVs connected to smart grids. Regarding the power system impacts in case of EV integration into smart grids, the challenges and difficulties are categorized under the power system stability, voltage/current distortions, load profile, and power losses. Voltage/current distortions like sags, unbalances, harmonics, and supraharmonics are also detailed in the study. Subsequently, the key contributions to the smart grid in terms of energy management, grid-quality support, grid balancing, and socio-economic impacts are explained. In the energy management part, issues such as power flow, load balancing, and renewable energy integration are elaborated. Then, the fault ride-through capability, reactive power compensation, harmonic mitigation, and grid loss reduction are presented to provide information on power quality enhancement. Lastly, the socio-economic impacts in terms of employment, net billing fees, integration with renewable energy sources, and environmental effects are elucidated in the present study.