Blar i NTNU Open på forfatter "Norum, Lars Einar"
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Integrating Battery into MMC Submodule using passive technique
Wersland, Sigurd; Acharya, Anirudh Budnar; Norum, Lars Einar (Chapter, 2017)The modular structure and the many other advantages of the Modular Multilevel Converter makes it an attractive converter for Battery Energy Storage Systems, allowing the battery units to be distributed throughout the ... -
Integration of Photovoltaic into grid using Modular Multilevel Converter
Dolva, David Krogager (Master thesis, 2017)The integration of solar energy into the power grid is a challenging task. Many configurations and control methods have been studied. In this thesis, the Modular Multilevel Converter is adopted to integrated Photovoltaic ... -
Intelligent Power Control of CD Microgrid
Hajizadeh, Amin; Soltani, Mohsen; Norum, Lars Einar (Chapter, 2017)In this paper, an intelligent power management strategy is proposed for hybrid DC microgrid, including wind turbine, fuel cell and battery energy storage. The considered wind turbine has a permanent magnet synchronous ... -
Interconnection of an Isolated Power System to an External Power Supply: - Dimensioning, modelling and control
Dahl, Ferdinand Meltzer (Master thesis, 2014)In this master thesis, a possible solution on how to connect a jack-up rig to an external supply was proposed. Using a conceptual layout of a typical jack-up rig power system as the basis, a suitable solution was proposed. ... -
Isolated Full-Bridge DC-DC Converter Configurations for Photovoltaic Applications using Modular Multilevel Converter
Furu, Guro Watten (Master thesis, 2018)As a result of the continuously increasing carbon emissions, the global demand for cleaner energy is rising. Grid-connected photovoltaic (PV) systems is an attractive solution to provide green energy, and PV technology has ... -
Lab Setup and Testing of Lithium-Ion Batteries with Focus on Dynamic and Aging Modeling
Molund, Eirik (Master thesis, 2013)This report presents the work on making a lab setup for testing of different types of batteries in the energy storage lab at NTNU/SINTEF. A complete lab setup has been made and two different LiFePO4 chemistry cells of size ... -
Long Step out Umbilicals for Oil and Gas Subsea Pump or Compressor Application - Starting of Permanent Magnet Machine
Hallan, Andreas Harstad (Master thesis, 2012)Topside Variable Speed Drive (VSD) feeding a subsea load via a long cable is not a new technological challenge and many features in systems feeding asynchronous machines are well known. For a synchronous machine the situation ... -
Measurements of Harmonic Distortion in Maritime Power Systems
Lahti, Runar (Master thesis, 2015)Harmonic voltage distortion is a problem becoming more and more common in maritime power systems because of the increasing use of power electronics; especially in relation to VFDs. To avoid the possibility of damage and ... -
Model Predictive Control of Power Electronics Converter
Wang, Jiaying (Master thesis, 2012)This work makes a detailed analysis on the principles and characteristics of Direct Power Control (DPC) and Model Predictive Control (MPC) applied to three-phase half-bridge PWM Rectifier. Model predictive control has ... -
Modular Multilevel Converter (MMC) For Motor Drive Applications
Sajjadi, Seyed Adnan (Master thesis, 2013)The first chapter has demonstrated on the state of art of multilevel converter technology. Fundamental multilevel converter structures and modulation paradigms has been discussed. The focus has addressed classical, modern ... -
Modular Multilevel Converter for Electric Motor Drive Applications
Ekern, Bertil Lassesen (Master thesis, 2015)In this master thesis the topic of Modular Multilevel Converters (MMC) has been studied. The working principle of the converter is presented with advantageous attributes such as a multilevel waveform, a modular realization ... -
Modular multilevel converter for photovoltaic application with high energy yield under uneven irradiance
Acharya, Anirudh Budnar; Sera, Dezso; Teodorescu, Remus; Norum, Lars Einar (Peer reviewed; Journal article, 2020)The direct integration of Photovoltaic (PV) to the three-phase Modular Multilevel Converter (MMC) without dc–dc converters results in high-efficiency PV power plant with increased energy yield. The arm power control method ... -
Modulation Methods for Neutral-Point-Clamped Three-Level Inverter
Floten, Sveinung; Haug, Tor Stian (Master thesis, 2010)Multilevel converters have seen an increasing popularity in the last years for medium- and high-voltage applications. The most popular has been the three-level neutral clamped converter and still research is going on to ... -
Monitoring of load torque variations by using an Electrical Drive with Direct Torque Control
Aarskog, Fredrik Gundersen (Master thesis, 2011)This work analyses the accuracy of the estimated mechanical speed and electromagnetic torque in a Direct Torque Controlled (DTC) induction motor drive with no speed measurement. A literature study has been performed in ... -
Nonlinear Control Structure of Grid Connected Modular Multilevel Converters
Hajizadeh, A.; Norum, Lars Einar; Ahadpour Shal, A (Journal article; Peer reviewed, 2017)This paper implements nonlinear control structure based on Adaptive Fuzzy Sliding Mode (AFSM) Current Control and Unscented Kalman Filter (UKF) to estimate the capacitor voltages from the measurement of arm currents of ... -
Operation of IGBT-Modules in Insulation Liquids - A First Step for Enabling Operation in High Pressure Environments
Holmefjord, Kristian Eikeland (Master thesis, 2015)Theory regarding the main components needed in a subsea converter are provided. Focus is spent on the IGBT and pulse testing are described. A safe and fully functional test cell for high voltage single and double pulse ... -
Optimization of Capacitor for Sub Sea Motor Drive Application
Thapa, Umesh (Master thesis, 2010)Optimization of Capacitor for Sub Sea Motor Drive ApplicationStudent: Umesh ThapaSupervisor: Prof. Lars NorumContact: Espen HauganProblem DescriptionSubsea drives are very large and expensive equipments. Normally subsea ... -
Power Electronics Converter for use in Direct Electrical Heating Application
Eliassen, Sivert (Master thesis, 2012)Direct Electrical Heating (DEH) is a flow assurance method in subsea pipelines operating at high pressure and low temperatures and has gained ground throughout the last decade. DEH systems in operation are based on passive ... -
Power Electronics Converters for Microgrids with Smart Grid Functionality: Digital Implementation of Proportional Resonant Controllers
Galami, Selie (Master thesis, 2014)The fast evolving technology has resulted in an extensive use of power electronics. The desire of making a grid network more intelligent can be fulfilled by these power electronics device. Based on the controller design ... -
Power Supply for Down-hole Applications Based on Flow
Kazmi, Syed Ali Irtaza (Master thesis, 2017)The main focus of this thesis is to develop a power supply for feeding power to the down-hole electronic devices such as, instrumentation and communication units. The traditional way of supplying power using long cables ...