Browsing by Author "Gökçek T."

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    Optimal Bidding Strategy of a Pumped Hydro Energy Storage Integrated Nuclear Power Plant considering Possible Outage
    (Hindawi Limited, 2022) Uǧuz F.; Turan A.; Gökçek T.; Ateş Y.; Erdinç O.
    Recently, harmful gases emitted into the atmosphere disrupt the balance of nature and cause climate changes. The tendency towards renewable energy is increasing in order to prevent climate change. The importance of the conventional power plants in the power system is maintained due to the intermittent nature of renewable energy sources. In this regard, nuclear power which is one of the conventional power plants takes attention. In this study, a new approach for optimal scheduling of a Pumped Hydro Energy Storage (PHES) integrated Nuclear Power Plant (NPP) system is proposed. It is expected that PHES provides significant economic contribution to the grid operator especially by ensuring energy supply security of the NPP. Two different market types named Day Ahead Market (DAM) and Balancing Market (BM) in Turkey are implemented in the trades by using real electricity prices obtained from Energy Exchange Istanbul (EXIST), which is Energy Market Operator in Turkey. In order to evaluate the effectiveness of the proposed model, seasonal impacts of four different months are also examined in several case studies. Furthermore, sustainability analyzes are conducted considering probability of interruption of the NPP during 8 hours. According to the results, it is observed that promising solutions can be obtained thanks to the integration of the PHES in the presence of the different market types even if outages are planned. © 2022 Fatih Uǧuz et al.
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    Microgrid Frequency Regulation and Optimal Sizing of Emergency Generator Considering VSG Coupled Electric Vehicles
    (Taylor and Francis Ltd., 2023) Gülkaya B.; Gökçek T.; Ateş Y.; Boynueğri A.R.
    Recently, the transition from conventional to renewable energy sources (RESs), from internal combustion engine vehicles to electric vehicles (EVs), and from the main grid to microgrids (MGs) are essential goals to both reduce greenhouse gas emissions and ensure the stability of power systems. However, the transitions cause new concerns in the grid including technical challenges and financial viability. This study examines the RES-based MG under realistic conditions considering the uncertainty in fleet size of EVs, emergency generator capacity, solar irradiation, and wind speed in island mode. The work aims to provide effective solutions including conventional methods alongside today’s trend namely doubly fed electrical generators (DFIG), vehicle-to-grid mechanism (V2G), maximum power point tracking controller (MPPT), voltage source inverter (VSI) with high switching frequency for technical challenges, and virtual synchronous generator (VSG) mechanism for financial viability. The paper provides a guide for resizing the emergency generators capacity depending on system instability. The observations verify that the control mechanisms reinforce the system to remain stable by decreasing the range of frequency fluctuation from 3.1 to <0.05 Hz, the peak point of frequency from 51.8 to 50.05 Hz, and the emergency generator capacity from 0.7605 to 0.3420 MVAr at MATLAB and Simulink. © 2023 Taylor & Francis Group, LLC.
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    Production Cost Minimization Considering Integrated Carbon and Electricity Trading System
    (Institute of Electrical and Electronics Engineers Inc., 2023) Taş E.; Gökçek T.; Erdinç O.; Ateş Y.
    This study presents a production decision model that minimizes costs in an industrial production plant for carbon and electricity consumption under a joint carbon-electricity trading system. The motivation is to offer users a way to reduce their production costs within this integrated carbon and electricity trading framework. The model utilizes a cap-and-trade scheme for carbon trading and takes into account hourly electricity prices, carbon credit prices, electricity consumption required for production, and carbon emissions during production. Using the Mixed Integer Programming method, the optimization model effectively minimizes costs, leading to significant savings. © 2023 IEEE.
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    A New Approach for Distribution System Reconfiguration with PV, ESS and EV Availability
    (Institute of Electrical and Electronics Engineers Inc., 2023) Topçuoǧlu Y.; Gökçek T.; Ateş Y.; Erdinç O.
    In this study, the aim is to minimize operational and line losses costs by reconfiguring the grid in various cases, including line fault occurrences. This is achieved by employing the Mixed Integer Quadratically Constrained Program (MIQCP) optimization designed for a grid with diverse systems, adapting to parameters that vary over time. The operational costs encompass switching costs, energy generation, as well as charging and discharging expenses. A test case model is utilized, featuring a modified 17-busbar setup with dynamic loads, serving as the grid model. This model incorporates various systems such as the Photovoltaic (PV) system, an energy storage system (ESS), and an electric vehicle (EV) charging station. Here, it is accepted that the parameters of EVs, power demands and storage capacities are time dependent. © 2023 IEEE.