Browsing by Author "Poyrazoğlu, Göktürk"
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A4WP-QI combo system for continious wireless charging range coverage with resonance filtering
Sağlam, Üstün (2019-01-02)Distribution of wireless power charging field uniformly on a large area pad is critical for receivers, especially for wearable devices because of their small form factor receiver coil. Since the receiver coil size is quite ... -
Applications of time-series methods in electricity price forecasting
Ülgen, Toygar (2021-01-18)The prediction of day-ahead electricity prices with higher accuracy is always helpful for the market players of the power exchange. Models were designed in the first place to find out the best time-series estimation method ... -
Battery integrated off-grid DC fast charging: Optimised system design case for California
Elibol, B.; Poyrazoğlu, Göktürk; Çalışkan, B. C.; Kaya, H.; Armağan, Ç.; Akınç, H. E.; Kaymaz, A. (IEEE, 2021)Global acceptance and exploitation of electric vehicles (EV) is no doubt a fact. There are two major factors beneath this growth; 1. increasing battery capacity thus rising range and 2. availability of DC fast charging ... -
Co-optimization of transmission maintenance scheduling and production cost minimization
Poyrazoğlu, Göktürk; Oh, H. (MDPI, 2019-08-01)Regular transmission maintenance is important to keep the infrastructure resilient and reliable. Delays providing on-time maintenance increase the forced outage rate of those assets, causing unexpected changes in the ... -
DC-link capacitor lifetime under various operating conditions
Bilgin, Mert Serdar; Poyrazoğlu, Göktürk; Aktem, M.; Er, E. (IEEE, 2019)A grid-tied DC/AC converter transfers the energy to the power system under different operating conditions such as DC-Link voltage level, power factor, and instability in the grid voltage. There are some effects of the ... -
Demand-driven electricity supply options of electric vehicles: modelling, simulation, and management strategy of public charging stations
Göktürk, Elvin Çoban; Poyrazoğlu, Göktürk (Springer, 2021-10-13)In this chapter, we discuss the challenges and research opportunities in the demand-driven electricity supply options of electric vehicles (EVs) at public charging stations (CSs). EVs have gained increased attention in ... -
Design of capacitive coupled transformer for power converter applications
Onur, Necdet Kaan; Poyrazoğlu, Göktürk (IEEE, 2021)In this paper, power transfer will be made with a capacitive coupled transformer structure. Inductive transformers are difficult to produce and take time because a certain number of turns are required. Instead of an inductive ... -
Design of the circuitry, battery management system, and wireless communication of an electric vehicle
Kurt, Atakan; Dolu, Uğur; Kaya, Burak; Poyrazoğlu, Göktürk (IEEE, 2019-06)Electric vehicles start to take an essential place in our lives to support the sustainability and energy efficiency. In order to train the required workforce, a team of engineering students is assigned to develop an in-house ... -
Determination of price zones during transition from uniform to zonal electricity market: A case study for Turkey
Poyrazoğlu, Göktürk (MDPI AG, 2021-02)In the electricity market, different pricing models can be applied to increase market competitiveness. Different electricity systems use different market structures. Uniform marginal pricing, zonal marginal pricing, and ... -
Development of a single-chip visible light communication receiver
The VLC has drawn the attention in the last decade, which is simply based on the data transmission over the visible light (400nm-700nm). It is considered as an alternative to RF-based technologies and offers unlicensed ... -
Development of novel methodologies for rotational dynamics applications
Abbasi, Ahmad (2020-12-31)In this thesis, a novel methodology is proposed to determine the parameters of a rotating unbalance in a rotor-bearing system. For that purpose, the weighted sum of squared difference between the analytical and predicted ... -
Development of novel methodologies for the damage detection in mechanical systems
Firoozi, Behnam (2020-12-31)The present study examines the capability of various optimization algorithms and proposes novel hybrid algorithms for the more precise prediction of open-edge cracks in mechanical systems. The natural frequencies of the ... -
Electrical and financial analyses of ev charging stations by statistical and probabilistic simulation
Increasing environmental pollution with the increase of vehicles that have internal combustion engines has led people to alternative methods due to the transportation sector's share in environmental pollution. Last decade, ... -
Energy consumption modeling and optimization of speed profile for plug-in electric vechiles
Tasooji, Tohid Kargar (2018-05)In recent years, there is a surge in research on Plug-in Electric Vehicles (PEVs), as PEVs are one of the ways that we can reduce carbon emissions. Dramatic cost reduction in PEVs has resulted in their becoming mainstream ... -
Experimental analysis of the impact of the refrigerator components on conducted electromagnetic interference
As the number of electronic devices in our daily lives increases day by day, the risk of electromagnetic interference (EMI) between the devices and between the device and the grid increases. Refrigerators are the only ... -
Experimental impact analysis of the refrigerator cable design on disturbance power test
The ever-increasing variety of electronic products brings with it many tests and controls. Especially for a product such as a refrigerator, which has an important place in the lives of users and works non-stop for almost ... -
Flexibility assessment tool by failure-based uncertainty management in power systems
Poyrazoğlu, Göktürk; Dolu, Uğur (IEEE, 2019)Flexibility in power systems operations is the capability to operate the system under secure conditions even after a sudden change in the system conditions. One of the sudden change may be considered as the failure of ... -
High frequency power supply design
Zengin, Özlem Özden (2019-08-20)Portability, power density, and energy e ciency are among the hottest topics of today. Therefore, the need for higher power-capacity, smaller size, and higher e ciency power supply is increasing day by day. At this point, ... -
Image fusion hardware implementation with an optimized reduction circuit
Aydın, Furkan (2018-08)In this thesis, the hardware implementation of a real-time image fusion algorithm using a High-Level Synthesis (HLS) tool is presented. Image fusion combines two or more images through a color transformation process. Di ... -
The impact of electric vehicle charging stations on power distribution grid by statistical and probabilistic simulation
Keser, Doğukan; Poyrazoğlu, Göktürk (IEEE, 2020-10-20)Number of electric vehicle charging stations have been increasing for the last decade. They will significantly affect the power distribution grid in terms of increased load and uncertainty. This paper analyzes the impact ...
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