Nye registreringer

  • Off-field Testing of Grid Scenarios at Medium Voltage in Flexible AC Transmission Systems involving Wind Energy 

    Lorenzen, Helge; Timmerberg, Josef; Lüken, Tim; Mylvaganam, Saba (Chapter, 2020)
    As a result of the geographical location of north-western Germany, the local grid operator EWE NETZ has a pioneer role with respect to the integration of renewable energy sources in existing AC transmission systems. About ...
  • Under-Frequency Load Shedding in Mongolia: Simulation Assessment Considering Inertia Scenarios 

    Adiyabazar, Choidorj; Acosta Montalvo, Martha Nohemi; Gonzalez-Longatt, Francisco; Rueda Torres, Jose Luis; Palensky, Peter (Peer reviewed; Journal article, 2020)
    Mongolia power system (MPS) is evolving quite fast, and the integration of renewable resources (mainly wind power and solar photovoltaic) reached 20% by 2019. The MPS is interconnected to Russia in order to cover local ...
  • Improvement of the Frequency Response Indicators by Optimal UFLS Scheme Settings 

    Acosta Montalvo, Martha Nohemi; Andrade, Manuel A.; Vazquez, Ernesto; Adiyabazar, Choidorj; Gonzalez-Longatt, Francisco; Torres, Jose Luis Rueda; Palensky, Peter (Peer reviewed; Journal article, 2020)
    This research investigates the positive changes in the system frequency response indicators caused by the implementation of a set of optimal settings of an under-frequency load shedding (UFLS) scheme. The optimal under-frequency ...
  • 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 ...
  • Optimal Settings of Fast Active Power Controller: Nordic Case 

    Acosta Montalvo, Martha Nohemi; Gonzalez-Longatt, Francisco; Denysiuk, Serhii; Strelkova, Halyna (Chapter, 2020)
    The Nordic power system is continuously changing, and it has been experiencing a growing replacing of conventional power plants with renewable power plants, this together with other factors are causing reduction of the ...
  • Descriptive Statistical Analysis of Frequency control-related variables of Nordic Power System 

    Acosta Montalvo, Martha Nohemi; Andrade, Manuel A.; Vazquez, Ernesto; Sanchez, Francisco; Gonzalez-Longatt, Francisco; Rueda Torres, Jose Luis (Peer reviewed; Journal article, 2020)
    This paper presents a descriptive statistical analysis (DSA) of time-series of electro-mechanical quantities related to the frequency control (e.g. kinetic energy (KE), electrical frequency and power demand) of the Nordic ...
  • Assessment of Under-Frequency Load Shedding in Mongolia Considering Inertia Scenarios 

    Adiyabazar, Choidorj; Acosta Montalvo, Martha Nohemi; Gonzalez-Longatt, Francisco; Rueda Torres, Jose Luis; Palensky, Peter (Chapter, 2020)
    The Mongolian power system (MPS) has been changing in recent years mainly by the integration of wind power and solar photovoltaic sources which until 2019 has been reached a 20% of the total generation sources. The ...
  • 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 ...
  • Optimal UFLS Settings: An Assessment of Frequency System Response Indicators 

    Acosta Montalvo, Martha Nohemi; Adiyabazar, Choidorj; Gonzalez-Longatt, Francisco; Rueda Torres, Jose Luis; Palensky, Peter (Chapter, 2020)
    This paper investigates the positive changes in the system frequency response indicators caused by the implementation of a set of optimal settings of an under-frequency load shedding (UFLS) scheme. The optimal UFLS scheme ...
  • Power Converters Dominated Power Systems 

    Gonzalez-Longatt, Francisco; Acosta Montalvo, Martha Nohemi; Chamorro, H. R.; Rueda Torres, Jose Luis (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 ...
  • 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 ...
  • Contact Resistance and Temperature Rise of Cable Connections in Cable Distribution Cabinets 

    Fjeld, Elin; Rondeel, Wilhelm G. J.; Sønsteby, Gunn Kristin; Bekken, Finn Werner; Eriksen, Thomas Ranvik (Peer reviewed; Conference object, 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 

    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 ...
  • Analysing uncertainty in parameter estimation and prediction for grey-box building thermal behaviour models 

    Brastein, O.M.; Ghaderi, Ali; Pfeiffer, Carlos; Skeie, Nils-Olav (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 

    Nøland, Jonas Kristiansen; Leandro, Matteo; Nysveen, Arne; Øyvang, Thomas (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 ...
  • High Speed EIT with Multifrequency Excitation Using FPGA and Response Analysis Using FDM 

    Darnajou, Mathieu; Dupré, Antoine; Dang, Chunhui; Ricciardi, Guillaume; Bourennane, Salah; Bellis, Cédric; Mylvaganam, Saba (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 ...
  • An approximate well-balanced upgrade of Godunov-type schemes for the isothermal Euler equations and the drift flux model with laminar friction and gravitation 

    Abbasi, Mohammad Hossein; Naderi Lordejani, Sajad; Berg, Christian; Iapichino, Laura; Schilders, Wil H. A.; van de Wouw, Nathan (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 ...
  • Economic Model Predictive Control for optimal struvite recovery 

    Nair, Abhilash Muralidharan; Haugen, Finn; Ratnaweera, Harsha (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 

    Nair, Abhilash Muralidharan; Gonzalez Silva, Blanca Magdalena; Haugen, Finn; Ratnaweera, Harsha; Østerhus, Stein Wold (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 ...
  • Status of Micro/Mini-Grid Systems in a Himalayan Nation: A Comprehensive Review 

    Shrestha, Ashish; Rajbhandari, Yaju; Khadka, Nasib; Bista, Aayush; Marahatta, Anup; Dahal, Rojesh; Mallik, Jiwan Kumar; Thapa, Anup; Hayes, Barry P.; Korba, Petr; Gonzalez-Longatt, Francisco (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 ...

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