Browsing Electrical & Electronics Engineering by Author "(ORCID 0000-0002-8503-1767 & YÖK ID 280588) Poyrazoğlu, Göktürk"
Now showing items 1-20 of 52
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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 ... -
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 ... -
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 ... -
Experimental impact analysis of the refrigerator cable design on disturbance power test
Araz, Fırat; Poyrazoğlu, Göktürk (IEEE, 2022)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 ... -
Experimental impact analysis of the refrigerator cable distributions on conducted electromagnetic emission
Maro, Arda; Poyrazoğlu, Göktürk (IEEE, 2022)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 ... -
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 ... -
Impact of cyber-security breach to price signals on power market: An experimental human simulation
Poyrazoğlu, Göktürk; Oh, H. S. (IEEE, 2018)The market power is a term defined in power economics as a potential to make the electric power market volatile. A supplier having the market power has an opportunity to speculate on the market clearing price. Observance ... -
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 ... -
Impact of gas price on electricity price forecasting via supervised learning and random walk
Poyrazoğlu, Göktürk (IEEE, 2019)The electricity is a regular commodity that is being sold and bought in a highly transparent and efficient market in Turkey. The market is operated by EXIST and an hourly energy price is formed for every hour in the day-ahead ...
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