Search for dissertations about: "Generator"

Showing result 11 - 15 of 468 swedish dissertations containing the word Generator.

2. 11. Subsynchronous Resonance in Doubly Fed Induction Generator based Wind farms

   Author : Selam Chernet; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; generalized Nyquist criterion GNC .; Passivity; doubly-fed induction generator DFIG ; subsynchronous controller interaction SSCI ; Wind power; Impedance-based analysis; induction generator effect IGE ; subsynchronous resonance SSR ;

   Abstract : The objective of this thesis is to investigate the risk for instabilities due to subsynchronous resonance (SSR) conditions in large wind farms connected to series-compensated transmission lines. In particular, the focus is on doubly-fed induction generator (DFIG) based wind farms. READ MORE

4. 12. Synchronous generator and frequency converter in wind turbine applications : system design and efficiency

   Author : Anders Grauers; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; synchronous generator; frequency converter; wind turbine; avrage efficiency; losses; system design; variable speed;

   Abstract : This report deals with an electrical system for variable-speed wind powerplants. It consists of a synchronous generator, a diode rectifier and athyristor inverter. READ MORE

5. 13. Low Speed Energy Conversion from Marine Currents

   Author : Karin Thomas; Mats Leijon; Cameron Johnstone; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical power technology; Direct Drive Generator; Finite Element Method; Marine Current Energy; Synchronous Generator; Permanent Magnet; Tidal Current Energy; Elkraftteknik; Engineering physics; Teknisk fysik;

   Abstract : The focus of this thesis is research on the performance of very low speed direct drive permanent magnet generators for energy conversion from marine and tidal currents. Various aspects involved in the design of these generators and their electromagnetic modelling using the finite element simulations are presented. READ MORE

6. 14. On LFSR based Stream Ciphers - analysis and design

   Author : Patrik Ekdahl; Institutionen för elektro- och informationsteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; self-shrinking generator; shrinking generator; E0; A5; sober; stream cipher; LFSR; snow; Informatics; systems theory; Informatik; systemteori;

   Abstract : Stream ciphers are cryptographic primitives used to ensure privacy in digital communication. In this thesis we focus on stream ciphers built using Linear Feedback Shift Registers (LFSRs). Several different stream ciphers are analysed and new attacks are presented. In addition, two new stream ciphers are presented, both based on the same design. READ MORE

7. 15. Retargeting of an incremental code generator

   Author : Johnny Eckerland; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : Incremental programming environments are becoming increasingly popular. Earlier systems are mostly based on interpretation. DICE is an incremental programming environment based on incremental compilation only. In this thesis the retargeting of the code generator from PDP-11 to DEC-20 is described. READ MORE