Umit Cali

Umit Cali
Norwegian University of Science and Technology | NTNU · Department of Electrical Power Engineering

Doctor of Engineering

About

100
Publications
16,021
Reads
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802
Citations
Citations since 2016
94 Research Items
753 Citations
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2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300
Introduction
Education
May 2005 - June 2010
Universität Kassel
Field of study
  • Electrical Engineering and Computer Science

Publications

Publications (100)
Article
Full-text available
Decarbonization of energy systems has been a recent trend during the last two decades where large-scale renewable energy sources (RES) are integrated into the modern power systems. Various countries have developed new energy policy instruments, such as Renewable Energy Certificates (RECs), to promote the growth of RES. RECs are tradable, non-tangib...
Preprint
p>Digitization in the power industry enables wide connectivity among multiple new entrants such as DERs, prosumers, and P2P counterparts within or outside the Distributed Ledger Technology (DLT). The use of DLT to improve resilience in the power grid has growing support, but new technology provides new opportunities for adversaries to cause harm. T...
Preprint
p>Digitization in the power industry enables wide connectivity among multiple new entrants such as DERs, prosumers, and P2P counterparts within or outside the Distributed Ledger Technology (DLT). The use of DLT to improve resilience in the power grid has growing support, but new technology provides new opportunities for adversaries to cause harm. T...
Preprint
Full-text available
With the rapid development and integration of artificial intelligence (AI) methods in next-generation networks (NextG), AI algorithms have provided significant advantages for NextG in terms of frequency spectrum usage, bandwidth, latency, and security. A key feature of NextG is the integration of AI, i.e., self-learning architecture based on self-s...
Article
Full-text available
Nowadays, EVs are rapidly increasing in popularity, and are accepted as the vehicles of the future all over the world. The most important components are their battery and charging systems. The energy capacity of EVs’ batteries has a significant potential to supply different energy requirements. Therefore, EVs must be designed in accordance with bid...
Article
Full-text available
Traditional assessment indexes could not fully describe offshore wind resource for the meteorological properties of offshore are more complex than onshore. And as a result, the uncertainty of offshore wind power projects would be increased and final economic benefits would be affected. Therefore, a study on offshore wind resource assessment is carr...
Preprint
p>Smart contracts (SCs) are a set of logical procedures that can be run by individual peers participating within a Distributed Ledger Technology (DLT) network. By design, smart contracts inherit many of the benefits of DLT, including its immutability, scalability and security properties. Nevertheless, they may introduce additional attack vectors, w...
Preprint
p>Smart contracts (SCs) are a set of logical procedures that can be run by individual peers participating within a Distributed Ledger Technology (DLT) network. By design, smart contracts inherit many of the benefits of DLT, including its immutability, scalability and security properties. Nevertheless, they may introduce additional attack vectors, w...
Preprint
Full-text available
Cellular networks (LTE, 5G, and beyond) are dramatically growing with high demand from consumers and more promising than the other wireless networks with advanced telecommunication technologies. The main goal of these networks is to connect billions of devices, systems, and users with high-speed data transmission, high cell capacity, and low latenc...
Preprint
Full-text available
Over the last few decades, extensive use of information and communication technologies has been the main driver of the digitalization of power systems. Proper and secure monitoring of the critical grid infrastructure became an integral part of the modern power system. Using phasor measurement units (PMUs) to surveil the power system is one of the t...
Preprint
p>As the global industrial complex gears toward fulfilling the tenets of Industry 4.0 and beyond, technologies such as distributed ledger technologies, digital twins, and artificial intelligence become pivotal enablers. In the last decade, metaverse as a concept and technology found its place among crucial enablers for technology and digital advanc...
Preprint
p>As the global industrial complex gears toward fulfilling the tenets of Industry 4.0 and beyond, technologies such as distributed ledger technologies, digital twins, and artificial intelligence become pivotal enablers. In the last decade, metaverse as a concept and technology found its place among crucial enablers for technology and digital advanc...
Article
The continued development of distributed energy resources (DER), information and communications technologies is enabling a greater number of parties to participate in electricity markets. This review explores the various methods that DERs may utilize to participate in electricity markets, the differing architectures and methodologies used to model...
Preprint
p>Future wireless networks \textcolor{black}{(5G and beyond),} also known as Next Generation or NextG, are the vision of forthcoming cellular systems, connecting billions of devices and people together. In the last decades, cellular networks have been dramatically growth with advanced telecommunication technologies for high-speed data transmission,...
Preprint
Full-text available
Future wireless networks (5G and beyond) are the vision of forthcoming cellular systems, connecting billions of devices and people together. In the last decades, cellular networks have been dramatically growth with advanced telecommunication technologies for high-speed data transmission, high cell capacity, and low latency. The main goal of those t...
Article
Full-text available
The solar photovoltaics (PV) energy resources have become more important with their significant contribution to the current power grid among renewable energy resources. However, the integration of the solar PV causes reliability issues in the power grid due to its high dependence on the weather condition. The predictability and stability of forecas...
Article
Full-text available
Substantial penetration levels of intermittent and fluctuated renewable energy resources like PV can cause overcapacity and other operational challenges in the grid. Therefore, energy market actors are directed to the feed-in limitations and restrict the installed capacity. Likewise, the declining incentives make energy storage central to increasin...
Article
Full-text available
Support schemes like the Feed-in-Tariff (FiT) have for many years been an important driver for the deployment of distributed energy resources, and the transition from consumerism to prosumerism. This democratization and decarbonization of the energy system has led to both challenges and opportunities for the system operators, paving the way for eme...
Conference Paper
Full-text available
Medical data is often highly sensitive in terms of data privacy and security concerns. Federated learning, one type of machine learning techniques, has been started to use for the improvement of the privacy and security of medical data. In the federated learning, the training data is distributed across multiple machines, and the learning process is...
Preprint
Full-text available
Medical data is often highly sensitive in terms of data privacy and security concerns. Federated learning, one type of machine learning techniques, has been started to use for the improvement of the privacy and security of medical data. In the federated learning, the training data is distributed across multiple machines, and the learning process is...
Preprint
Full-text available
The design of a security scheme for beamforming prediction is critical for next-generation wireless networks (5G, 6G, and beyond). However, there is no consensus about protecting the beamforming prediction using deep learning algorithms in these networks. This paper presents the security vulnerabilities in deep learning for beamforming prediction u...
Preprint
Full-text available
This work presents a formal review of smart contracts, including definitions, technical requirements, and potential power and energy-related use cases. This includes in-depth discussions covering cybersecurity, legality and interoperability goals that must be taken into consideration by potential end-users. The paper presents a first attempt toward...
Preprint
This work presents a formal review of smart contracts, including definitions, technical requirements, and potential power and energy-related use cases. This includes in-depth discussions covering cybersecurity, legality and interoperability goals that must be taken into consideration by potential end-users. The paper presents a first attempt toward...
Article
Full-text available
As the transition to electric mobility is expanding at a rapid pace, operationally feasible and economically viable charging infrastructure is needed to support electrified fleets. This paper presents a co-simulation of optimal electric vehicle supply equipment (EVSE) and techno-economic system design models to investigate the behaviors of various...
Article
Full-text available
6G – sixth generation – is the latest cellular technology currently under development for wireless communication systems. In recent years, machine learning (ML) algorithms have been applied widely in various fields, such as healthcare, transportation, energy, autonomous cars, and many more. Those algorithms have also been used in communication tech...
Preprint
Full-text available
Support schemes like the Feed-in-Tariff have for many years been an important driver for the deployment of distributed energy resources, and the transition from consumerism to prosumerism. This democratization and decarbonization of the energy system has led to both challenges and opportunities for the system operators, paving the way for emerging...
Article
Unlocking offshore wind farms' high energy generation potential requires a comprehensive multidisciplinary analysis that consists of intensive technical, economic, logistical, and environmental investigations. Offshore wind energy projects have high investment volumes that make it essential to execute an extensive site selection to ensure feasible...
Article
Full-text available
Motivated by factors such as the reduction in cost and the need for a shift towards achieving UN’s Sustainable Development Goals, PV (Photovoltaic) power generation is getting more attention in the cold regions of the Nordic countries and Canada. The cold climate and the albedo effect of snow in these regions present favorable operating conditions...
Article
Full-text available
The modern power systems are evolving in parallel to the development of other technological trends such as decarbonization and digitalization. While the penetration of renewable energy resources is increasing within the national and regional energy mix, emerging digitalization technologies, such as artificial intelligence and blockchain technology...
Chapter
This review paper aims to discover the research gap and assess the feasibility of a holistic approach for photovoltaic (PV) system operational fault analysis using machine learning (ML) methods. The analysis includes the detection and diagnosis of operational faults in a PV system. Even if standard protective devices are installed in PV systems, th...
Article
Full-text available
Future wireless networks (5G and beyond), also known as Next Generation or NextG, are the vision of forthcoming cellular systems, connecting billions of devices and people together. In the last decades, cellular networks have dramatically grown with advanced telecommunication technologies for high-speed data transmission, high cell capacity, and lo...
Article
Full-text available
The aim of this study is to determine the degree of importance of criteria affecting site selection of solar photovoltaic (PV) projects using a decision-making model. This study consists of four consecutive stages, as follows: criteria identification, questionnaire (survey), statistical analyses, and degree of importance of criteria. In the first s...
Article
Full-text available
The recent advances in the modern power grids, such as growing energy demand and penetration of higher amounts of distributed energy generators like renewable energy resources, caused additional grid integration challenges for the distributed energy system operators. Besides, deep electrification impacts triggered by a growing share of electric veh...
Preprint
Full-text available
Renewable energy sources (RES) are among the most popular emerging energy resources during the past two decades. Many countries have introduced various energy policy instruments, such as renewable energy certificates (RECs), to support the growth of RES. RECs are tradable non-tangible assets, which have a monetary value. Tracking and certification...
Preprint
Full-text available
This paper presents a load control algorithm for control of energy sources and loads to enhance energy sustainability and reliability of the International Space Station (ISS), which is a large spacecraft in orbit around Earth. In this paper, the ISS electric power system was simulated in MATLAB/Simulink to be able to evaluate the performance of the...
Preprint
Full-text available
The use of solar photovoltaics (PV) energy provides additional resources to the electric power grid. The downside of this integration is that the solar power supply is unreliable and highly dependent on the weather condition. The predictability and stability of forecasting are critical for the full utilization of solar power. This study reviews and...
Conference Paper
Full-text available
This paper presents a load control algorithm for control of energy sources and loads to enhance energy sustainability and reliability of the International Space Station (ISS), which is a large spacecraft in orbit around Earth. In this paper, the ISS electric power system was simulated in MATLAB/Simulink to be able to evaluate the performance of the...
Conference Paper
Full-text available
The use of solar photovoltaics (PV) energy provides additional resources to the electric power grid. The downside of this integration is that the solar power supply is unreliable and highly dependent on the weather condition. The predictability and stability of forecasting are critical for the full utilization of solar power. This study reviews and...
Conference Paper
Full-text available
Renewable energy sources (RES) are among the most popular emerging energy resources during the past two decades. Many countries have introduced various energy policy instruments, such as renewable energy certificates (RECs), to support the growth of RES. RECs are tradable non-tangible assets, which have a monetary value. Tracking and certification...
Article
Advancements in material science and production technologies of solar photovoltaics (PV) system components, have obvious impacts in terms of Levelized Cost of Electricity (LCOE) reductions over time. Beside such technologies in physical sciences, digitalization technologies have increasingly positive impacts on the cost efficient operation and inve...
Article
Full-text available
The global trend toward integration of distributed energy resources is opening doors to advanced, complex, and distributed marketplaces. Such advanced ecosystems, where utility-owned and non utility-owned assets can contribute toward grid operations, generally require distributed communication and grid architectures. We posit the potential of using...
Chapter
Today with the emergence of smart grid applications, advanced information, communication, computing, and optimization technologies supporting two-way information flow, smart sensing, machine learning, and data analytics have been incorporated into the existing power grid. These technologies and applications improve grid reliability and efficiency a...
Chapter
Electric power systems are critical infrastructure on which people’s health and safety depends. Consequently, cybersecurity is a fundamental requirement for the digitalization of power systems, and it must be designed into the digitalization architecture from the beginning because it is not possible to build a secure system on an insecure foundatio...
Chapter
This chapter introduces the book, which is about the transformation of current energy systems through decarbonization, and digitization supported by advanced information, communication, and control technologies beside higher penetration of renewable energy sources (RES) to the power grids. The integration of digital technology from the information...
Chapter
The term smart grid refers to a next-generation electrical grid that uses advanced information, communication, and computing technologies to operate more efficiently. These technologies also provide tremendous economic and environmental benefits to the electrical grid. With emerging smart grid technologies, the deployment of smart devices and appli...
Chapter
In this chapter, the use of blockchain technology (BT) in the field of power systems and markets is discussed. Since BT has the potential to transform businesses in a disruptive manner, it is essential to explore the real potential of this emerging technology and initiate healthy discussions beyond the initial hype created around blockchain, fueled...
Chapter
This chapter provides a brief and compact overview of the basic terminologies and definitions in Big Data (BD), machine learning (ML), artificial intelligence (AI) and explainable AI (XAI). BD focuses on collecting, cleansing, storing, analyzing, extracting information from, align with interpreting large datasets in science and businesses from heal...
Chapter
The electric power industry is undergoing substantial changes as it transitions from an industry primarily based on fossil fuels to one primarily based on renewables, and from a largely undigitialized grid to one connected through IoT technology. In contrast with fossil fuel powerplants, renewable generators are being deployed in a distributed fash...
Chapter
While the electric power grid of the twentieth century was simple, with one directional power flow from centralized generating plants through the transmission grid and the distribution grid to end user loads, the power grid of the twenty-first century has become increasingly complex. The incorporation of renewables and their management has proven a...
Chapter
Prior to and during the commercialization of the Internet in the early 1990s, most of the focus was on supporting end devices that were used by humans. While there were some early experiments on connecting machines to the Internet as end devices, the real growth in communication between two devices had to wait until device miniaturization, low-powe...
Chapter
Electricity is essential and fundamental to society and people. The power industry over the globe has been undergoing major transitions toward deregulated competitive markets, which bring more affordable, reliable, and cleaner electric power to customers. The wholesale and retail electricity markets have been established in many countries to allow...
Article
Full-text available
The objective of this study is to introduce a new use case under smart energy cyber-physical-social system (CPSS) that brings together the competence of distributed ledger technology (DLT) and essence of peer-to-peer local energy markets. This use case involves donation sharing under a DLT-based charity system to support financially-disadvantaged c...
Article
Full-text available
During the last decade there has been a major shift towards renewable energy sources to fulfill the increasing demand for energy in a sustainable manner. However, a major challenge with renewable energy sources is their dependence on weather conditions which makes generation highly uncertain and intermittent. Energy storage is deemed instrumental t...
Article
Purpose This paper aims to introduce the current-state of the energy grid, to reviews new and enabling peer-to-peer and blockchain-based solutions and to propose a strategic go-to-market framework, populated with energy companies strategically positioned to capture the unique opportunities present across the energy industry. Design/methodology/app...
Article
Full-text available
Artificial Intelligence (AI) has been among the most emerging research and industrial application fields, especially in the healthcare domain, but operated as a black-box model with a limited understanding of its inner working over the past decades. AI algorithms are, in large part, built on weights calculated as a result of large matrix multiplica...
Article
The technical, logistical, and ecological challenges associated with offshore wind development necessitate an extensive site selection analysis. Technical parameters such as wind resource, logistical concerns such as distance to shore, and ecological considerations such as fisheries all must be evaluated and weighted, in many cases with incomplete...