Browsing by Author "Poyrazoğlu, Göktürk"
Now showing items 1-20 of 76
-
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 ... -
Algorithmic approaches for DER sizing and spatial placement in radial networks
Aydın, Beyzanur; Poyrazoğlu, Göktürk (IEEE, 2023)Deployment of distributed energy resources (DERs) into the unidirectional distribution grid while respecting operational limits such as reliable voltage range, low system losses, etc. poses challenges that require a viable ... -
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 ... -
Capacity planning for forming sustainable and cost-effective nanogrids
Sayed, Ahmad El; Poyrazoğlu, Göktürk; Ahmed, Eıhab Elgaıly Elmukshfı (IEEE, 2023)This paper proposes a new strategy for nanogrid capacity planning as a bilevel programming mathematical model with look-ahead logic. The first program, the Planner, is a linear program that solves for the optimal size of ... -
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 ... -
Comparison of DC-link capacitor types under various grid conditions
Bilgin, M. S.; Poyrazoğlu, Göktürk; Aktem, M.; Er, E. (IEEE, 2019-04)A DC/AC converter can face negative conditions of power systems such as instability. One of the most crucial necessities of the grid is voltage stability. There are some effects of voltage unbalance for grid-tied DC/AC ... -
Consumer, producer, and prosumer based mathematical models for optimal energy storage sizing
Sancar, Semanur; Poyrazoğlu, Göktürk (IEEE, 2022)Energy storage technologies are getting more attention by the increased number of discussions on energy supply security, grid resiliency, and increased flexibility. While lots of studies showed the advantages and disadvantages ... -
Current balancing circuit design for parallel LED strings in QDOT high bright TV with dual-transformer LLC resonant topology
Ersoy, Melisa; Poyrazoğlu, Göktürk (IEEE, 2022)New LED technologies demand slim designs with increased backlight power. When the parallel-connected LED strings are driven by multiple transformers, the magnetic coupling difference and the LED string voltage difference ... -
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 ... -
Decision model and application of electric vehicle charger installation to distribution transformers
Güngör, Hüseyin Tufan; Poyrazoğlu, Göktürk (IEEE, 2022)It is very evident that the number of electric vehicles worldwide will increase and that the dominant mobility concept in the future will be at the center of EVs. As a requirement of e-mobility, EVs should be rechargeable ... -
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 ... -
Digital data integration project between a DSO and a university for sustainability and efficiency
Kartcı, Emin; Akkus, E. E.; Sancar, Semanur; Bugdayci, T. A.; Bektas, M.; Poyrazoğlu, Göktürk (IEEE, 2022)Digitization in the energy sector enables big data analysis that can lead to large-scale energy efficiency due to the size of the sector and thus getting closer to sustainability targets. With a digital data integration ... -
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, ...
Share this page
