Browsing by Author "Celik, D."

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Hydrogen Production and Storage Methods: Recent Trends and Technologies
(Institute of Electrical and Electronics Engineers Inc., 2024) Celik, D.
Hydrogen is an emerging technology that offers a sustainable energy pathway for the transportation industry and buildings. It can help reduce environmental pollution and climate change. In this context, this paper investigates hydrogen production and storage methods to calculate carbon emissions (CEs) of an electrical energy system and assess the environmental benefits of carbon reduction. An analytical model for carbon emission flow (CEF) in the electricity network is addressed to evaluate the carbon emission. The case study results are presented to evaluate CO2 emissions and average emission intensity concerning hydrogen production. This paper provides a thorough investigation of the hydrogen energy landscape with future implications. By emphasizing this unique focus, it is envisaged that the literature will be enriched and the understanding of hydrogen as a promising energy source will gradually increase. © 2024 IEEE.
An Isolated High-Power Bidirectional Five-Level Npc Dual Active Bridge Dc-Dc Converter With Anti-Windup Pi Controller for Electric Vehicle-To Application
(Institute of Electrical and Electronics Engineers Inc., 2023) Ekici, E.; Koroglu, T.; Celik, D.
This paper introduces the design and analysis of an isolated bidirectional five-level (5L) neutral point clamped (NPC) dual active bridge DC-DC converter with an improved anti-windup strategy using proportional-integral (PI) controller for electric vehicle-to-home applications. The proposed converter is more advantageous in that it provides a 5L output voltage at the high-frequency isolation transformer sides thanks to its NPC structure compared to the conventional full-bridge circuit. Reducing switching stresses, providing galvanic isolation, ensuring bidirectional power flow and simple control strategy are the highlights of the proposed structure. A single phase shift (SPS) modulation strategy has been employed to regulate the output voltage and to generate switching signals of the proposed DC-DC converters' switches. To improve the dc-link voltage and to reduce the output voltage tracking errors, the anti-windup PI (PIAW) controller has been utilized instead of the conventional PI controller. To demonstrate the verification of the proposed converter and its controller, a simulation model has been developed in MATLAB/Simulink software. The performance and effectiveness of the proposed converter have been evaluated under steady-state and dynamic variations by the simulation results. © 2023 IEEE.
A New Area Towards To Digitalization of Energy Systems: Enables, Challenges and Solutions
(Institute of Electrical and Electronics Engineers Inc., 2022) Celik, D.; Meral, M.E.; Waseem, M.
With the ever-increasing energy demand, the electric power sector and the energy industry are promoted to decentralization, decarbonization and digitalization. The digital platforms gradually become a megatrend for a clean energy system. Digitalization of the energy systems has conducted changes in various dimensions such as energy savings, sustainability and security. In this paper, the impact of digitalization on the electric energy systems, electric vehicles (EVs), sustainable development goal (SDGs) and greenhouse gas (GHG) emissions are analyzed and investigated. A systematic overview and discussions on the key drivers for digitalization and decentralization of energy systems are addressed. This paper provides significant insights for digitalization of the energy systems from a global perspective. Some enable, challenges and solutions are also handled to analyze the impact of digitalization. © 2022 IEEE.
Photovoltaic Integration on Distribution Networks: Harmonic Mitigation With Passive Filters
(Institute of Electrical and Electronics Engineers Inc., 2025) Celik, D.; Yucel, Y.A.; Goyal, S.K.
The integration of solar photovoltaic (PV) systems has become crucial for modern power generation, offering significant environmental and technical benefits. However, high penetration of PV systems into electricity distribution grids can present operational challenges, including reverse power flow, voltage fluctuations, and harmonic distortions. This paper investigates the impact of PV energy systems and static nonlinear loads (NLLs) on grid performance, with a focus on power quality, voltage stability, and harmonic mitigation. The study uses single-tuned passive filters (STPF) as a solution to reduce harmonic distortions caused by nonlinear loads, thereby enhancing overall power quality. A detailed simulation of the PV distribution grid, incorporating both PV systems and static loads, is conducted using ETAP software to assess system performance under different operational scenarios. The findings highlight the need for effective integration strategies to ensure grid stability and power quality in the presence of renewable energy sources and NLLs. © 2025 IEEE.