• Battery power smoothing control in a marine electric power plant using nonlinear model predictive control 

      Bø, Torstein Ingebrigtsen; Johansen, Tor Arne (Journal article; Peer reviewed, 2016)
      This brief presents a power variation smoothing method using batteries on a weak ship grid. For some marine vessels, power fluctuations on the ac grid are large. This results in the large variations in the electrical ...
    • Dynamic consequence analysis of marine electric power plant in dynamic positioning 

      Bø, Torstein Ingebrigtsen; Johansen, Tor Arne; Sørensen, Asgeir Johan; Mathiesen, Eirik (Journal article; Peer reviewed, 2016)
      Diesel-electric power and propulsion systems with electric thrusters are the industry standard for vessels with dynamic positioning (DP) systems. Diesel engines are paired with generators in generator sets and are used to ...
    • Dynamic Model Predictive Control for Load Sharing in Electric Power Plants for Ships 

      Bø, Torstein Ingebrigtsen (Master thesis, 2012)
      The main contribution of this thesis is an investigation of model predictive control(MPC) for marine diesel electric power plants. Recommendations and new ideasfor further development are emphasized.The motivation of the ...
    • Dynamic Positioning System as Dynamic Energy Storage on Diesel-Electric Ships 

      Johansen, Tor Arne; Bø, Torstein Ingebrigtsen; Mathiesen, Eirik; Veksler, Aleksander Vladimirovitsj; Sørensen, Asgeir Johan (Journal article; Peer reviewed, 2014)
      A dynamic positioning (DP) system on a diesel-electric ship applies electric power to keep the positioning and heading of the ship subject to dynamic disturbances due to the winds, waves and other external forces using ...
    • Dynamic Safety Constraints by Scenario Based Economic Model Predictive Control 

      Bø, Torstein Ingebrigtsen; Johansen, Tor Arne (Chapter; Conference object; Peer reviewed, 2014)
      This paper studies use of scenario based model predictive control (MPC) to control a plant into a fault-tolerant state set. For some systems it is not always sufficient that the controller is reconfigured after a fault, ...
    • Dynamic Safety Constraints by Scenario Based Economic Model Predictive Control of Marine Electric Power Plants 

      Bø, Torstein Ingebrigtsen; Johansen, Tor Arne (Journal article; Peer reviewed, 2016)
      This paper studies scenario-based model predictive control (MPC) for dynamic safety constraints. For marine electric power plant with direct current distribution and variable speed generator set, the speed of the generator ...
    • Investigation of drivetrain losses of a DP vessel 

      Bø, Torstein Ingebrigtsen; Swider, Anna; Pedersen, Eilif (Chapter; Peer reviewed, 2017)
      Traditionally the efficiency of the drivetrain of a marine vessel is evaluated at rated power and speed. However, the thrust and power consumption of the thrusters are low during DP operation. In this study, the loss energy ...
    • Marine Vessel and Power Plant System Simulator 

      Bø, Torstein Ingebrigtsen; Dahl, Andreas Reason; Johansen, Tor Arne; Mathiesen, Eirik; Rejani Miyazaki, Michel; Pedersen, Eilif; Skjetne, Roger; Sørensen, Asgeir Johan; Thorat, Laxminarayan; Yum, Kevin K. (Peer reviewed, 2015)
      Modern marine electric propulsion vessels have many systems. These interactions and integration aspects are essential when studying a system and subsystem behavior. This is especially important when considering fault ...
    • Model Predictive Control of Marine Power Plants with Gas Engines and Battery 

      Bø, Torstein Ingebrigtsen; Vaktskjold, Erlend; Pedersen, Eilif; Mo, Olve (Journal article; Peer reviewed, 2019)
      The electric load demand on marine vessels is constantly changing during some operational modes, such as in harsh weather or complex operations. Therefore, diesel engines are typically used to handle these variations. Gas ...
    • Models and Methods for Efficiency Estimation of a Marine Electric Power Grid 

      Bø, Torstein Ingebrigtsen; Pedersen, Eilif (Chapter; Peer reviewed, 2017)
      Diesel electric propulsion has become industry standard for many marine applications. Typically, a significant part of the operations of vessels with diesel electric propulsion is done with low loads on the motors and ...
    • Potential power setups, fuels and hull designs capable of satisfying future EEDI requirements 

      Lindstad, Elizabeth; Bø, Torstein Ingebrigtsen (Journal article; Peer reviewed, 2018)
      Maritime emission regulations set limits for SOx and NOx emissions for health and environmental reasons, and for CO2, through the Energy Efficiency Design Index (EEDI), with the general aim of mitigating global warming. ...
    • Real-Time Marine Vessel and Power Plant Simulation 

      Bø, Torstein Ingebrigtsen; Johansen, Tor Arne; Dahl, Andreas Reason; Rejani Miyazaki, Michel; Pedersen, Eilif; Rokseth, Børge; Skjetne, Roger; Sørensen, Asgeir Johan; Thorat, Laxminarayan; Utne, Ingrid Bouwer; Yum, Koosup; Mathiesen, Eirik (Chapter; Peer reviewed, 2015)
      In this paper, we present a system simulator of a marine vessel and power plant which contains the mechanical system with diesel engines, propellers, steering gear, and thrusters; the electrical system with generators, ...
    • Reducing GHG emissions in Shipping - measures and options 

      Lindstad, Elizabeth; Bø, Torstein Ingebrigtsen; Eskeland, Gunnar (Chapter, 2018)
      CO2 emissions from maritime transport represent around 3% of total anthropogenic CO2 emissions. These emissions are assumed to increase by 50% to 250% up to 2050 in business-as-usual scenarios with a tripling of world ...
    • Reducing GHG emissions in Shipping - measures and options 

      Lindstad, Elizabeth; Bø, Torstein Ingebrigtsen; Eskeland, Gunnar (Chapter, 2018)
      CO2 emissions from maritime transport represent around 3% of total anthropogenic CO2 emissions. These emissions are assumed to increase by 50% to 250% up to 2050 in business-as-usual scenarios with a tripling of world ...
    • Scenario- and Optimization-Based Control of Marine Electric Power Systems 

      Bø, Torstein Ingebrigtsen (Doctoral thesis at NTNU;2016:47, Doctoral thesis, 2016)
      Diesel electric propulsion has become the industry standard for e.g., oil and gass vessels, cruise vessels, ferries, and vessels with dynamic positioning (DP) systems. Diesel engines are paired with generators to produce ...
    • Scenario-Based Fault-Tolerant Model Predictive Control for Diesel-Electric Marine Power Plant 

      Bø, Torstein Ingebrigtsen; Johansen, Tor Arne (Chapter; Conference object, 2013)
      Diesel-electric propulsion is often used for vessels with dynamic positioning systems. For such vessels any single point failure should not lead to loss of position. One failure case is that a generator set is suddenly ...
    • Towards Safer, Smarter and Greener Ships Using Hybrid Marine Power Plants 

      Sørensen, Asgeir Johan; Skjetne, Roger; Bø, Torstein Ingebrigtsen; Miyazaki, Michel Rejani; Johansen, Tor Arne; Utne, Ingrid Bouwer; Pedersen, Eilif (Journal article; Peer reviewed, 2017)
      This chapter gives an overview of research activities carried out at NTNU AMOS in relation to hybrid marine power plants enabling safer, smarter and greener ships. Recently electrical power plants with a set of diesel-generator ...