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Coordinated optimization of weekly reserve, day-ahead and balancing energy trade in hydropower
(Journal article; Peer reviewed, 2017)We present a model for optimal trade in a weekly power reserve market under day-ahead and balancing market price uncertainty. The model takes the perspective of a price-taking hydropower producer and a case study for the ... -
Coordination of Frequency Reserves in an Isolated Industrial Grid Equipped With Energy Storage and Dominated by Constant Power Loads
(Peer reviewed; Journal article, 2023)This paper examines the use of interconnected synchronous system requirements for frequency containment reserves (FCR) on isolated industrial grids that use turbogenerators as main source of energy, have high penetration ... -
Coordination of Hydro and Wind Power in a Transmission Constrained Area using SDDP
(Chapter; Peer reviewed, 2017)In this work we use a production scheduling model based on Stochastic Dual Dynamic Programming (SDDP) to investigate the effects of coordinating hydro and wind power production in a transmission-constrained area. A case ... -
Coordination of Hydro and Wind Power in a Transmission Constrained Area using SDDP
(Master thesis, 2016)As a part of the initiative to reduce the effects of climate change by moving towards increased shares of energy from renewable sources Norway and many other European countries has stated clear targets described in the ... -
Coordination of Modular Multilevel Converter Based HVDC Terminals for Ancillary Services
(Chapter, 2018)This paper deals with the utilization of the energy storage capacity, inherently present in the Modular Multilevel Converter (MMC), in providing ancillary services to ac grids. The service considered in this paper is Power ... -
Coping with Harmonics in Smart Grid: variable speed driveswith Back-to-Back Voltage Source Converter versus the matrix converter
(Master thesis, 2013)In this master thesis it has been investigated to utilize the matrix as a shunt active power filter and an adjustable speed drive and then compare the matrix converter with the Back-to-Back voltage source converter in terms ... -
Correlation Between Electroluminescence and Partial Discharges in Silicone Rubber Used for High Voltage AC Subsea Connectors
(Master thesis, 2018)Processing of oil and gas has been performed on topside installations close to the wells. In the future, wells will be further away from the infrastructure and more processing will be performed on the seabed. This will ... -
Correlation challenges for North Sea offshore wind power: a Norwegian case study
(Peer reviewed; Journal article, 2023)Offshore wind power projects are currently booming around the North Sea. However, there are inherent correlation challenges between wind farms in this area, which has implications for the optimal composition of locations ... -
Cost benefit analysis of different offshore grid topologies in the North
(Master thesis, 2017)European countries are showing their willingness to reduce their greenhouse gases emissions in the coming years. For example, the Paris agreement within the United Nations Framework Convention on Climate Change (UNFCCC) ... -
Cost of flexibility in the future European power system
(Master thesis, 2015)Commitments from the European energy and climate of 20 per cent renewable energy share in the energy generation system by 2020 and a 85 to 90 per cent reduction in greenhouse gas emissions in 2050 entails a higher penetration ... -
Cost Optimal Design of Zero Emission Neighborhoods’ (ZENs) Energy System Model Presentation and Case Study on Evenstad
(Chapter, 2019)Zero Emission Neighborhoods (ZEN) is a concept studied in particular in the research center on ZEN in smart cities in Norway to reduce the CO2 emissions of neighborhoods. One question coming along this concept is how to ... -
Cost-Benefit Analysis of Battery Energy Storage in Electric Power Grids: Research and Practices
(Chapter, 2020)This paper provides an overview of methods for including Battery Energy Storage Systems (BESS) into electric power grid planning. The general approach to grid planning is the same with and without BESS, but when BESS is ... -
Cost-Benefit Analysis of Maintenance Measures for Power Transformers
(Master thesis, 2017)The work described in this thesis was conducted in cooperation with SINTEF Energy Research and their collaborating partners in the research project Trafotiltak . The objective of the project is to develop a decision-making ... -
Cost-optimal energy system design in Zero Energy Buildings with resulting grid impact: A case study of a German multi-family house
(Journal article; Peer reviewed, 2016)Zero Energy Buildings (ZEBs) are considered as one of the key elements to meet the Energy Strategy of the European Union. This paper investigates cost-optimal solutions for the energy system design in a ZEB and the subsequent ... -
Coupling currents and hysteresis losses in MgB2superconductors
(Journal article; Peer reviewed, 2014)MgB2 multi-filamentary superconductors are widely considered for use in dc applications. To expand the possible application range to ac apparatuses, the development of a low ac loss wire is needed. This development involves ... -
Cross-border Transfer of Electric Power Under Uncertainty: A Game of Incomplete Information
(Journal article; Peer reviewed, 2014)Cross-border transfer of electric power promotes collaboration in power generation between integrated electricity markets. It resolves grid reinforcement issues in existing transmission networks. Because of that, researchers ... -
Cross-border transmission line between Nepal and India: a test-case for the analysis of HVDC integration into an existing HVAC system
(Master thesis, 2016)Nepal has huge hydropower potential of 83,000 MW, of which 42,000 MW is technically and economically feasible. According to the annual report of Nepal Electricity Authority, the total installed capacity of hydropower in ... -
Current interruption performance of ultrahigh-pressure nitrogen arc
(Peer reviewed; Journal article, 2020)In this paper, the influence of gas filling pressure on the current interruption performance of different switch configurations with electric arcs burning in nitrogen has been experimentally investigated. A synthetic circuit ... -
Current-Based Coordination of Distributed Energy Resources in a Grid-Connected Low-Voltage Microgrid: An Experimental Validation of Adverse Operational Scenarios
(Peer reviewed; Journal article, 2022)Low-voltage grid-connected microgrids rely on the exploitation of inverter-interfaced distributed energy resources (DERs) in order to feed loads and to achieve bidirectional power flow controllability at their point of ... -
Cyber-Security Assessment of Power System Digital Components in the Conditions of Hostilities
(Chapter, 2023)Emergencies, including hostilities, create additional cyber-physical security (CPS) challenges for the operation of digital power system components. This paper showcases the main problems faced by one of the components of ...