• Estimate the temperature rise of medium voltage metal enclosed switchgear by simplified heat transfer calculations 

      Fjeld, Elin; Rondeel, Wilhelm G. J.; Attar, Elham; Singh, Shailendra (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 ...
    • Estimating uncertainty of model parameters obtained using numerical optimisation 

      Brastein, Ole Magnus; Lie, Bernt; Pfeiffer, Carlos Fernando; Skeie, Nils-Olav (Peer reviewed; Journal article, 2019)
      Obtaining accurate models that can predict the behaviour of dynamic systems is important for a variety of applications. Often, models contain parameters that are difficult to calculate from system descriptions. Hence, ...
    • Estimation of gas/liquid and oil/water interface levels in an oil/water/gas separator based on pressure measurements and regression modelling 

      Arvoh, Benjamin Kaku; Skeie, Nils-Olav; Halstensen, Maths (Journal article; Peer reviewed, 2013-02-08)
      Gravity separators are widely used for separation of gas/oil/water/sand from both offshore and onshore oil production facilities. Estimation of the gas/liquid and oil/water interface levels in gravity separators have been ...
    • Estimation of the heating time of small-scale buildings using dynamic models 

      Perera, Degurunnehalage Wathsala U.; Skeie, Nils-Olav (Journal article; Peer reviewed, 2016)
      Most buildings are not continuously occupied, such as office buildings, schools, churches and many residential buildings. Maintaining comfortable conditions only during the occupied periods reduces the energy costs. This ...
    • Estimation, system identification and chemometrics 

      Ergon, Rolf; Di Ruscio, David Luigi; Esbensen, Kim H.; Hagen, Svein Thore (Conference report, 2000)
      In our master degree program in process automation, traditional modeling and control courses are supplemented by courses in experimental design and chemometrics. A corresponding inter-disciplinary research program supports ...
    • Euler-Granular Approach for Modelling of Dilute Phase Pneumatic Conveying in a Vertical Pipe 

      Welahettige, Prasanna Kumara Welahetti; Ariyaratne, W. K. Hiromi; Melaaen, Morten Christian (Journal article; Peer reviewed, 2017)
      In the present study, vertically upward dilute phase pneumatic conveying flow was predicted using Euler - Granular method. Three dimensional computational fluid dynamics simulations were carried out for an 8 m long and ...
    • 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, ...
    • Excellence through internationalization : turning "losers" into "winners" 

      Clausen, Trond; Simonson, Larry (Conference report, 1994)
    • Experiences and trends in control education: a HIOA/USN perspective 

      Komulainen, Tiina M.; Alcocer, Alex; Haugen, Finn (Chapter; Peer reviewed, 2016)
      Global trends in higher education including e-learning, massive open online courses, and new teaching methods have positively affected control education. Control course content has evolved due to changes in industrial ...
    • Exploring Feedback and Gamification in a Data Modeling Learning Tool 

      Dæhli, Olav; Kristoffersen, Bjørn; Lauvås, Per; Sandnes, Tomas (Peer reviewed; Journal article, 2021)
      Data modeling is an essential part of IT studies. Learning how to design and structure a database is important when storing data in a relational database and is common practice in the IT industry. Most students need much ...
    • FAPI Controller for Frequency Support in Low-Inertia Power Systems 

      Rakhshani, Elyas; Perilla, Arcadio; Rueda Torres, Jose Luis; Gonzalez-Longatt, Francisco; Batista Soeiro, Thiago; van der Meijden, Mart A. M. M. (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 ...
    • Fast Active Power-Frequency Support Methods by Large Scale Electrolyzers for Multi-Energy Systems 

      Veerakumar, Nidarshan; Ahmad, Zameer; Adabi, M. Ebrahim; Rueda, Jose Luis; A. M. M. van der Meijden, Mart; Palensky, Peter; Gonzalez-Longatt, Francisco (Chapter, 2020)
      This paper presents a comparative assessment of fast active power regulation (FAPR) control strategies implemented on megawatt-scale controllable electrolysers, with the goal of achieving enhanced frequency support during ...
    • Fault Location in a VSC-HVDC Link Using Neural Networks 

      Páramo Balsa, Paula; Roldán Fernández, Juan Manuel; Gonzalez-Longatt, Francisco; Burgos Payán, Manuel; Riquelme Santos, Jesús (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 ...
    • Finding Y-relevant part of X by use of PCR and PLSR model reduction methods 

      Ergon, Rolf (Journal article; Peer reviewed, 2007)
      The paper is considering the following question: using principal component regression (PCR) or partial least squares regression (PLSR), how much data can be removed from X while retaining the original ability to predict ...
    • Flood Control of Lake Toke: Model Development and Model Fitting 

      Kvam, Kristian D.; Furenes, Beathe; Hasaa, Åsmund; Gjerseth, Alexander Zhang; Skeie, Nils-Olav; Lie, Bernt (Journal article; Peer reviewed, 2017)
    • Flood Management of Lake Toke: MPC Operation under Uncertainty 

      Menchacatorre, Itsaso; Sharma, Roshan; Furenes, Beathe; Lie, Bernt (Peer reviewed; Journal article, 2019)
      A deterministic reference tracking model predictive control (MPC) is in use at Skagerak Kraft for flood management of Lake Toke in Norway. An operational inflow estimate is used to predict the optimal gate opening at Dalsfos ...
    • 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 ...
    • Framework for Real-Time Simulation of Hardware in the Loop Applied to Primary Frequency Control 

      Barrios-Gomez, J.A.; Sanchez, Francisco; Gianfranco, Claudio; Gonzalez-Longatt, Francisco; Acosta Montalvo, Martha Nohemi; Denysiuk, Serhii; Strelkova, Halyna (Chapter, 2020)
      This research paper proposes a framework to perform (hardware in the loop) HIL simulation in real-time (RT), the framework includes steps for the formulation of the Target RT Computer and Open Source System, which are ...
    • 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, ...
    • Frequency Support of Fast-Multi-Energy Storage Systems in Low Rotational Inertia Scenarios 

      Ersdal, Anne Mai; Acosta Montalvo, Martha Nohemi; Gonzalez-Longatt, Francisco; Rueda Torres, Jose Luis; Palensky, Peter (Chapter, 2020)
      Modern power systems are increasing the connection of power electronic converters (PECs), and new inertia-less technologies displace the synchronous generation units. Therefore, the total rotational system inertia is ...