Blar i NTNU Open på forfatter "Kara, Güray"
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Characterizing flexibility in power markets and systems
Kara, Güray; Tomasgard, Asgeir; Farahmand, Hossein (Peer reviewed; Journal article, 2022)The increasing share of variable renewable energy sources creates a need for flexibility resources in the power system operations. This paper presents suggestions for characterizing flexibility, including dimensions of ... -
Comparing individual and coordinated demand response with dynamic and static power grid tariffs
Backe, Stian; Kara, Güray; Tomasgard, Asgeir (Peer reviewed; Journal article, 2020)This paper investigates cost-optimal operation of flexible electricity assets with a capacity-based power grid tariff involving power subscription. The purpose of this research is to identify the characteristics of a ... -
Flexibility Characterization, Aggregation, and Market Design Trends with a High Share of Renewables: a Review
Crespo del Granado, Pedro Andres; Rajasekharan, Jayaprakash; Pandiyan, Surya Venkatesh; Tomasgard, Asgeir; Kara, Güray; Farahmand, Hossein; Jaehnert, Stefan (Peer reviewed; Journal article, 2023)Purpose of Review Balancing a large share of solar and wind power generation in the power system will require a well synchronized coordination of all possible flexibility sources. This entails developing market designs ... -
The impact of uncertainty and time structure on optimal flexibility scheduling in active distribution networks
Kara, Güray; Pisciella, Paolo; Tomasgard, Asgeir; Farahmand, Hossein (Journal article; Peer reviewed, 2021)The authors focus on a model for system operators that uses centralized scheduling of multiple flexibility assets and services to minimize the cost of managing problems with grid congestion, voltages, and losses. The model ... -
Local Flexibility Markets in Smart Cities: Interactions Between Positive Energy Blocks
Backe, Stian; Kara, Güray; Crespo del Granado, Pedro; Tomasgard, Asgeir (Journal article; Peer reviewed, 2019)Adoption of solar PV and other distributed generation sources are becoming widespread and affordable across Europe. Local on-site energy production raises the chance to manage surplus energy (especially for variable renewable ... -
Stability advances in robust portfolio optimization under parallelepiped uncertainty
Kara, Güray; Özmen, Ayşe; Weber, Gerhard-Wilhelm (Journal article; Peer reviewed, 2017)In financial markets with high uncertainties, the trade-off between maximizing expected return and minimizing the risk is one of the main challenges in modeling and decision making. Since investors mostly shape their ... -
Stochastic local flexibility market design, bidding, and dispatch for distribution grid operations
Kara, Güray; Pisciella, Paolo; Tomasgard, Asgeir; Farahmand, Hossein; Granado, Pedro Crespo Del (Journal article; Peer reviewed, 2022)In order to unlock the flexibility potential of energy consumers and prosumers, the development of market mechanisms for flexibility planning and procurement is necessary. The authors propose a stochastic local flexibility ... -
Stochastic programming in analyses of flexibility in power systems and markets
Kara, Güray (Doctoral theses at NTNU;2022:31, Doctoral thesis, 2022)Summary of the thesis In the research for this thesis, operations research techniques are applied in power markets and systems to investigate the usage of flexibility under conditions of uncertainty. Economic dispatch ...