Viser treff 21-40 av 266

    • Zonal Day-Ahead Energy Market: A Modified Version of the IEEE 39-bus Test System 

      Tricarico, Gioacchino; Wagle, Raju; Dicorato, Maria; Forte, Giuseppe; Gonzalez-Longatt, Francisco; Rueda, José Luis (Chapter, 2022)
      The increasing penetration of renewable energy resources (RES) in transmission system operating conditions require a suitable test system and a dataset to cope with current issues. RES penetration remarkably affects day-ahead ...
    • Spray drop size characterization in an external-mixing bluff-body atomizer based on acoustics and Multivariate Analysis 

      Sikka, Raghav; Halstensen, Maths; Lundberg, Joachim (Peer reviewed; Journal article, 2022)
      Air-assist atomizers have been widely used in various applications such as the aerospace industry, internal combustion engines, molten metal, food processing, etc. The mean drop size for these atomizers was obtained through ...
    • Students’ view on applying for part-time work as an on-campus software developer 

      Lauvås, Per; Dæhli, Olav (Peer reviewed; Journal article, 2022)
      A majority of students work while they are studying. Working will help them financially, but it may also provide other benefits, such as preparing them for work-life after finishing their studies. As academic institutions, ...
    • Low-Viscosity Nonaqueous Sulfolane-Amine-Methanol Solvent Blend for Reversible CO2 Capture 

      Wagaarachchige, Jayangi Dinesha; Idris, Zulkifli; Arstad, Bjørnar; Kummamuru, Nithin Bharadwaj; Sætre, Kai Arne; Halstensen, Maths; Jens, Klaus-Joachim (Peer reviewed; Journal article, 2022)
      In this work, the absorption–desorption performance of CO2 in six new solvent blends of amine (diisopropylamine (DPA), 2-amino-2-methyl-1-propanol (AMP), methyldiethanolamine (MDEA), diethanolamine (DEA), diisopropanolamine ...
    • A review on techno-economic assessment of solar water heating systems in the middle east 

      Dehghan, Mehran; Pfeiffer, Carlos; Rakhshani, Elyas; Bakhshi-Jafarabadi, Reza (Peer reviewed; Journal article, 2021)
      Currently, the economy of Middle Eastern countries relies heavily on fossil fuel sources. The direct and indirect adverse consequences of fossil fuel utilization for power generation enforce the region’s countries to raise ...
    • Modelling the synchronisation control for a hydro power controller 

      Hellborg, Jonatan; Tollefsen, Tonje; Bhusal, Khemraj; Winkler, Dietmar (Peer reviewed; Journal article, 2021)
      This paper presents the modelling of a synchronisation control as used inside a typical hydro power controller for small hydro power plants. It was built using the open-source modelling language Modelica by use of the ...
    • Efficient parameterization of modelica models 

      Beutlich, Thomas; Winkler, Dietmar (Peer reviewed; Journal article, 2021)
      This article presents the different approaches and use cases for efficient parameterization of Modelica models by means of external data resources. The main motivation is to improve the overall quality, testability and ...
    • Developing protective limiters for a hydro power controller in modelica 

      Manoranjan, Luxshan; Winkler, Dietmar (Peer reviewed; Journal article, 2021)
      In recent years the operation of electrical power plants has become more and more challenging due to a more dynamic operation pattern in order to keep the voltage quality within the limits of what the electrical network ...
    • Stochastic MPC For Optimal Operation of Hydropower Station Under Uncertainty 

      Jeong, Changhun; Sharma, Roshan (Peer reviewed; Journal article, 2022)
      The operational condition at the Dalsfoss power station is complicated due to many requirements related to environmental regulations and safety constraints such as the seasonally varying water level requirement at the ...
    • MPC Operation with Improved Optimal Control Problem at Dalsfoss Power Plant 

      Jeong, Changun; Furenes, Beathe; Sharma, Roshan (Peer reviewed; Journal article, 2021)
      The operational conditions at the Dalsfoss power station are complicated due to many requirements such as environmental regulations and safety constraints. Model predictive control (MPC) has been in use at this power station ...
    • Static and dynamic eigenvalues in unified stability studies 

      Khodaparast, Jalal; Fosso, Olav B.; Molinas Cabrera, Maria Marta; Suul, Jon Are Wold (Peer reviewed; Journal article, 2022)
      A framework for unified analysis of small-signal and large-signal power system stability based on static and dynamic eigenvalues is proposed in this paper. The presented implementation is based on Gear's method, which is ...
    • Formulation of Stochastic MPC to Balance Intermittent Solar Power with Hydro Power in Microgrid 

      Pandey, Madhusudhan; Winkler, Dietmar; Sharma, Roshan; Lie, Bernt (Peer reviewed; Journal article, 2021)
      In a microgrid with both intermittent and dispatchable generation, the intermittency caused by sources such as solar power and wind power can be balanced using dispatchable sources like hydro power. Both generation and ...
    • Frequency stability issues and research opportunities in converter dominated power system 

      Shrestha, Ashish; Gonzalez-Longatt, Francisco (Journal article; Peer reviewed, 2021)
      Stable power supply has become a crucial thing in the current era of technology and automation. Although the power system has multiple stability issues and causes, frequency fluctuation plays a vital role in normal operation, ...
    • Challenges in the penetration of electric vehicles in developing countries with a focus on Nepal 

      Mali, Bijen; Shrestha, Ashish; Chapagain, Anish; Bishwokarma, Rajiv; Kumar, Pritam; Gonzalez-Longatt, Francisco (Peer reviewed; Journal article, 2021)
      With growing concerns of climate change and unreliable fuel market, the world is moving towards an electric-based transportation system, one that entails a country to overhaul major infrastructures, establish high monetary ...
    • A Bayesian Model to Forecast the Time Series Kinetic Energy Data for a Power System 

      Shrestha, Ashish; Ghimire, Bishal; Gonzalez-Longatt, Francisco (Journal article; Peer reviewed, 2021)
      With the massive penetration of electronic power converter (EPC)-based technologies, numerous issues are being noticed in the modern power system that may directly affect system dynamics and operational security. The ...
    • Time of use electricity pricing in power system planning and operation: Case study of Nepalese power system 

      Simkhada, Sunil; Niraula, Mani; Ojha, Prabesh Raj; Layalu, Yogesh; Singh, Ajay; Gwachha, Rakesh; Shrestha, Ashish (Journal article; Peer reviewed, 2021)
      The difference between load demand in the off-peak and peak period is usually high in the context of Nepal, and the highpeak load for a short time is the main reason for insufficiency in electricity, frequent electricity ...
    • Parametric sensitivity analysis of rotor angle stability indicators 

      Shrestha, Ashish; Gonzalez-Longatt, Francisco (Journal article; Peer reviewed, 2021)
      With the increasing penetration rate of Power Electronic Converter (PEC) based technologies, the electrical power systems are facing the problem of transient stability since the PEC based technologies do not contribute to ...
    • Parametric sensitivity analysis of rotor angle stability indicators: Simulation case 

      Shrestha, Ashish; Gonzalez-Longatt, Francisco (Journal article; Peer reviewed, 2021)
      Because power electronic converter (PEC) dominated power generators do not provide the rotational inertia and the proportion of synchronous generators is reducing, the modern electrical grids are confronting a challenge ...
    • Impact Study of Temperature on the Time Series Electricity Demand of Urban Nepal for Short-Term Load Forecasting 

      Rajbhandari, Yaju; Marahatta, Anup; Ghimire, Bishal; Shrestha, Ashish; Gachhadar, Anand; Thapa, Anup; Chapagain, Kamal; Korba, Petr (Journal article; Peer reviewed, 2021)
      Short-term electricity demand forecasting is one of the best ways to understand the changing characteristics of demand that helps to make important decisions regarding load flow analysis, preventing imbalance in generation ...
    • Evaluation of a LoRa Mesh Network for Smart Metering in Rural Locations 

      Marahatta, Anup; Rajbhandari, Yaju; Shrestha, Ashish; Singh, Ajay; Thapa, Anup; Gonzalez-Longatt, Francisco; Korba, Petr; Shin, Seokjoo (Peer reviewed; Journal article, 2021)
      Accompanying the advancement on the Internet of Things (IoT), the concept of remote monitoring and control using IoT devices is becoming popular. Digital smart meters hold many advantages over traditional analog meters, ...