Institutt for elektro, IT, og kybernetikk: Recent submissions
Now showing items 81-100 of 287
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Estimate the temperature rise of medium voltage metal enclosed switchgear by simplified heat transfer calculations
(Journal article; Peer reviewed, 2020)Electrical equipment will experience a rise in temperature during normal operation. During a development process, prototypes and laboratory tests will be required to make sure the temperature rises are within acceptable ... -
Power Converters Dominated Power Systems
(Chapter, 2020)The transition to a low-carbon society is the driving force pushing the traditional power system to increase the volume of non-synchronous technologies which mainly use power electronic converters (PEC) as an interface to ... -
Contact Resistance and Temperature Rise of Cable Connections in Cable Distribution Cabinets
(Conference lecture, 2020)Initiated by a number of fire accidents in the low voltage switchgear in cable distribution cabinets, investigations have been performed to identify the cause of these fires. The results indicate that the cable connection ... -
Fault Location in a VSC-HVDC Link Using Neural Networks
(Journal article, 2020)High-voltage direct current (HVDC) using voltage source converter (VSC) in transmission systems applications are currently a competitive alternative to the traditional AC transmission systems, especially for offshore wind ... -
Analysing uncertainty in parameter estimation and prediction for grey-box building thermal behaviour models
(Peer reviewed; Journal article, 2020)The potential reduction in energy consumption for space heating in buildings realised by the use of predictive control systems directly depends on the prediction accuracy of the building thermal behaviour model. Hence, ... -
Future Operational Regimes of Bulk Power Generation in The Era of Global Energy Transition: Grid Codes, Challenges and Open Issues
(Chapter, 2020)This paper explores the effects of the ongoing energy transition on the classical bulk power generation. The rapid increase in renewable penetration changes the role of grid-connected generators significantly. Large machines ... -
An approximate well-balanced upgrade of Godunov-type schemes for the isothermal Euler equations and the drift flux model with laminar friction and gravitation
(Peer reviewed; Journal article, 2020)In this article, approximate well-balanced (WB) finite-volume schemes are developed for the isothermal Euler equations and the drift flux model (DFM), widely used for the simulation of single- and two-phase flows. The ... -
High Speed EIT with Multifrequency Excitation Using FPGA and Response Analysis Using FDM
(Peer reviewed; Journal article, 2020)The investigation of quickly-evolving flow patterns in high-pressure and higherature flow rigs is crucial due to inherent hazards. There is a dire need for a high-speed, non-intrusive imaging technique to identify ... -
Economic Model Predictive Control for optimal struvite recovery
(Peer reviewed; Journal article, 2020)Resource recovery from municipal wastewater has been a prime focus for a decade. Although several recovery processes already exist in the market today, the high cost of material, inherent disturbance in the influent quality, ... -
Real-time monitoring of enhanced biological phosphorus removal in a multistage EBPR-MBBR using a soft-sensor for phosphates
(Peer reviewed; Journal article, 2020)Enhanced biological phosphorus removal (EBPR) from municipal wastewater has been achieved in a multistage Moving Bed Biofilm Reactor (MBBR) configuration. The process operations can be further optimized by real-time ... -
Data-Driven Trajectory Prediction of Grid Power Frequency Based on Neural Models
(Peer reviewed; Journal article, 2021)Frequency in power systems is a real-time information that shows the balance between generation and demand. Good system frequency observation is vital for system security and protection. This paper analyses the system ... -
Optimal under-frequency load shedding setting at Altai-Uliastai regional power system, Mongolia
(Peer reviewed; Journal article, 2020)The Altai-Uliastai regional power system (AURPS) is a regional power system radially interconnected to the power system of Mongolia. The 110 kV interconnection is exceptionally long and susceptible to frequent trips because ... -
Status of Micro/Mini-Grid Systems in a Himalayan Nation: A Comprehensive Review
(Peer reviewed; Journal article, 2020)Nepal is a Himalayan country with its 83% of its geography being composed of hills and mountains. Around 22% of the Nepalese population is not receiving electricity through the national power utility and is forced to ... -
Optimal Frequency Support of Variable-Speed Hydropower Plants at Telemark and Vestfold, Norway: Future Scenarios of Nordic Power System
(Peer reviewed; Journal article, 2020)The integration of renewable resources is quickly growing in the Nordic power system (NPS), and it has led to increasing challenges for the operation and control of the NPS. Nordic countries require that the first-generation ... -
Innovative primary frequency control in low‐inertia power systems based on wide‐area RoCoF sharing
(Journal article, 2020)Future plans for integration of large non-synchronous generation and the expansion of the power system in the Nordic countries are a concern to transmission system operators due to the common interconnections and electricity ... -
FAPI Controller for Frequency Support in Low-Inertia Power Systems
(Journal article, 2020)This paper presents different forms of Fast Active Power Injection (FAPI) control schemes for the analysis and development of different mitigation measures to address the frequency stability problem due to the growth of ... -
Robust PI controller design for frequency stabilisation in a hybrid microgrid system considering parameter uncertainties and communication time delay
(Peer reviewed; Journal article, 2019)One of the major issues in the operation of an islanded microgrid is the frequency deviations caused by the variation of power production coming from non-dispatchable renewable energy sources. Using an appropriate control ... -
Human behaviour modelling for welfare technology using hidden Markov models
(Peer reviewed; Journal article, 2019)Human behaviour modelling for welfare technology is the task of recognizing a person's behaviour patterns in order to construct a safe environment for that person. It is useful in building environments for older adults or ... -
Model-Free PI/PID Controller Tuning of Higher Order Nonlinear Dynamic Systems
(Peer reviewed; Journal article, 2019)This paper concerns model-free PI/PID controller tuning of possible (nonlinear) higher order systems. The method can be considered as a three-step procedure. The first step is to persistently excite the system in open loop ... -
Welfare Technology, Healthcare, and Behaviour Modelling – An Analysis
(Peer reviewed; Journal article, 2019)Welfare technology is a growing area of research due to the increase in the ageing population. In Nordic countries, public authorities are the primary healthcare providers. Therefore, there is significant of investment to ...