Search for dissertations about: "Isolated power systems"

Showing result 1 - 5 of 35 swedish dissertations containing the words Isolated power systems.

2. 1. Generation Reliability for Isolated Power Systems with Solar, Wind and Hydro Generation

   Author : Jimmy Ehnberg; Chalmers University of Technology; []
   Keywords : Generation reliability; Isolated power systems; Wind power; Solar power; Renewable energy; Stochastic modelling;

   Abstract : This licentiate thesis deals with reliability issues for small isolated power systems. The focus is on power systems in remote areas based entirely on renewable energy sources. The sources investigated in this thesis are mainly solar and wind power; stochastic models for these energy sources are presented. READ MORE

4. 2. Wide Range Isolated Power Converters

   Author : Muhammad Abu Bakar; Kent Bertilsson; Johan Sidén; Jorge Garcia; Mittuniversitetet; []
   Keywords : Power converters; Resonant converters; wide range converter; stable performance;

   Abstract : Power electronics technology is rapidly growing in most industrialapplications. There is an increasing demand for efficient and low profilepower converters in the industry like automotive, power grids, renewableenergy systems, electric rail systems, home appliances, and informationtechnology. READ MORE

5. 3. On soft-switching isolated AC/DC converters without auxiliary circuit

   Author : Staffan Norrga; Stefan Östlund; Rik De Doncker; KTH; []
   Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical power technology; voltage source converter; cycloconverter; isolated converter; medium frequency transformer; soft switching; modulation; commutation; wind power; electric traction; Elkraftteknik; Electric power engineering; Elkraftteknik;

   Abstract : The thesis is concerned with a class of power electronic converter systems that permit bidirectional AC/DC conversion with galvanic separation of the AC and DC sides by a transformer operating at elevated frequency. The systems consist of a capacitively snubbered voltage source converter and a cycloconverter, separated by the mentioned transformer. READ MORE

6. 4. Hydropower plants and power systems : Dynamic processes and control for stable and efficient operation

   Author : Weijia Yang; Per Norrlund; Urban Lundin; Christophe Nicolet; Uppsala universitet; []
   Keywords : ;

   Abstract : As the largest global renewable source, hydropower shoulders a large portion of the regulation duty in many power systems. New challenges are emerging from variable renewable energy (VRE) sources, the increasing scale and complexity of hydropower plants (HPPs) and power grid. READ MORE

7. 5. Some Control Applications in Electric Power Systems

   Author : Magnus Akke; Industriell elektroteknik och automation; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; load switching.; power oscillations; differential equation algorithm; transmission line protection; computer relaying; frequency estimation; DC cable; magnetic compass; Automation; robotics; control engineering; Automatiska system; robotteknik; reglerteknik;

   Abstract : This thesis presents some control applications in electric power systems. The work consists of the four parts: interaction between DC cables and ship steering autopilots; frequency estimation; computer relaying; field tests using load switching to damp power oscillations. READ MORE