• Developing an Application for Simulating a Parametrized PM Machine by FEM 

      Haugdal, Hallvar (Master thesis, 2016)
      A parametrized 2D model of a permanent magnet synchronous machine is developed in the finite elements method software COMSOL Multiphysics, along with a graphical user interface to control it. The GUI provides automatic ...
    • Electric Field Simulations of High Voltage DC Extruded Cable Systems 

      Mauseth, Frank; Haugdal, Hallvar (Journal article, 2017)
      The market for high voltage DC (HVDC) transmission systems has increased dramatically the last few decades. This is mainly due to the economic, electrical, and environmental advantages for bulk power transmission over long ...
    • Estimation of Oscillatory Mode Activity from PMU Measurements 

      Haugdal, Hallvar; Uhlen, Kjetil; Müller, Daniel; Jóhannsson, Hjörtur (Chapter, 2020)
      We propose a method for estimating the activity of oscillatory modes in power systems. The frequencies and mode shapes of the modes of interest are assumed to be known beforehand, either from linear modal analysis or from ...
    • Fault Detection and Prediction in Smart Grids 

      Andresen, Christian Andre; Torsæter, Bendik Nybakk; Haugdal, Hallvar; Uhlen, Kjetil (Chapter, 2018)
      Modern society is to a larger and larger extent dependant on electric energy, and hence the reliance on and utilization of the electric grid is increasing steadily. At the same time the production and consumption patterns ...
    • Mode Shape Estimation using Complex Principal Component Analysis and k-Means Clustering 

      Haugdal, Hallvar; Uhlen, Kjetil (Chapter, 2019)
      We propose an empirical method for identifying low damped modes and corresponding mode shapes using frequency measurements from a Wide Area Monitoring System. The method consists of two main steps: Firstly, Complex Principal ...
    • Power Oscillation Monitoring using Statistical Learning Methods 

      Haugdal, Hallvar; Uhlen, Kjetil (Chapter, 2019)
      This paper describes development and testing of a method for estimation of electromechanic modes and corresponding mode shapes from frequency or voltage angle measurements in Wide Area Monitioring Systems. The method uses ...