Search for dissertations about: "power system restoration"

Showing result 1 - 5 of 15 swedish dissertations containing the words power system restoration.

2. 1. Hydropower generator and power system interaction

   Author : Johan Bladh; Urban Lundin; Rafael Escarela-Perez; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Amortisseur windings; applied voltage test; automatic voltage regulators; damper windings; damping torque; empirical modelling; equivalent circuits; excitation control; finite element method; hydropower generators; power system restoration; power system stability; synchronous machines; self excitation; shaft torque amplification; short circuit test; single machine infinite bus; slip test; standstill frequency response test; subsynchronous oscillations; synchronising torque; synchronous generators; torsional interaction.; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

   Abstract : After decades of routine operation, the hydropower industry faces new challenges. Large-scale integration of other renewable sources of generation in the power system accentuates the role of hydropower as a regulating resource. READ MORE

4. 2. On Risks in Power System Restoration

   Author : Fredrik Edström; Lennart Söder; Evert Agneholm; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : .... READ MORE

5. 3. Technical infrastructure networks as socio-technical systems : Addressing infrastructure resilience and societal outage consequences

   Author : Finn Landegren; Industriell elektroteknik och automation; []
   Keywords : Critical infrastructure; Socio-technical system; Resilience; Restoration; Simulation; Quality of supply regulation; Societal consequence;

   Abstract : Research area: Modern society is increasingly dependent on a range of technical infrastructure networks including e.g. power, transport and IT networks. This dependence is illustrated by large disturbances which from time to time affect these systems, often to an extent which few did consider possible. READ MORE

6. 4. Protection Strategies to Mitigate Major Power Systems Breakdowns

   Author : Mattias Jonsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; system protection schemes; transient instability; distance protection; power swing detectors; voltage instability; generator coherency; wide area protection; out-of-step protection;

   Abstract : This thesis deals with new methods to improve the performance of power system protection in the case of voltage- and transient instability. These methods are designed primarily to mitigate power system breakdown. Relay algorithms are proposed where conventional distance protection is combined with additional relay criteria. READ MORE

7. 5. Makten över monumenten : restaurering av vasaslott 1850-2000

   Author : Mia Geijer; Victor Edman; Riitta Nikula; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Restoration; preservation; maintenance; reconstruction; castles; Architecture; Arkitektur;

   Abstract : During the period 1850–2000 the Renaissance castles created by the Swedish Vasa kings, who reigned during the sixteenth and early seventeenth centuries, have been subject to restorations. During the period an official management body for the built heritage, a legal system and political guidelines for the maintenance have been developed. READ MORE