Sökning: "electric circuit"

Visar resultat 1 - 5 av 136 avhandlingar innehållade orden electric circuit.

1. 1. Modelling Wave Power by Equivalent Circuit Theory

   Författare :Ling Hai; Mats Leijon; Rafael Waters; Yongliang Zhang; Uppsala universitet; []
   Nyckelord :Wave energy; hydrodynamics; electric circuit; electrical analogy; energy absorption; force; system modelling; Simulink; engineering science; renewable energy; Teknisk fysik med inriktning mot elektricitetslära; Engineering Science with specialization in Science of Electricity;

   Sammanfattning : The motion of ocean waves can be captured and converted into usable electricity. This indicates that wave power has the potential to supply electricity to grids like wind or solar power. A point absorbing wave energy converter (WEC) system has been developed for power production at Uppsala University. LÄS MER

3. 2. On reliability and maintenance modelling of ageing equipment in electric power systems

   Författare :Tommie Lindquist; Roland Eriksson; Lina Bertling; George Anders; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reliability; maintenance; electric power systems; circuit breaker; disconnector; thermography; Electric power engineering; Elkraftteknik;

   Sammanfattning : Maintenance optimisation is essential to achieve cost-efficiency, availability and reliability of supply in electric power systems. The process of maintenance optimisation requires information about the costs of preventive and corrective maintenance, as well as the costs of failures borne by both electricity suppliers and customers. LÄS MER

4. 3. Increasing Energy Efficiency in Electric Trains Operation : Driver Advisory Systems and Energy Storage

   Författare :Nima Ghaviha; Erik Dahlquist; Markus Bohlin; Fredrik Wallin; Rob M.P. Goverde; Mälardalens högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Driver Advisory System; Catenary-free Operation; Electric Train; Electric Multiple Unit; Battery; Energy Efficiency; Energy Storage; Speed Profile Optimization; Energy- and Environmental Engineering; energi- och miljöteknik;

   Sammanfattning : Electric traction is the most efficient traction system in the railway transportation. However, due to the expensive infrastructure and high power demand from the grid, the share of electric trains in the railway transportation is still lower than other trains. LÄS MER

5. 4. Analysis of Synchronous machine dynamics using a novel equivalent circuit model

   Författare :Christer Danielsson; Chandur Sadarangani; Göran Engdahl; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Synchronous machine; Equivalent circuit; Magnetic equivalent circuit model; Simulation model; Parameter determination; Electric power engineering; Elkraftteknik;

   Sammanfattning : This thesis investigates simulation of synchronous machines using a novel Magnetic Equivalent Circuit (MEC) model. The proposed model offers sufficient detail richness for design calculations, while still keeping the simulation time acceptably short. Different modeling methods and circuit alternatives are considered. LÄS MER

7. 5. Hydrodynamic Modelling of Wave Power using Electrical Equivalent Circuit Theory

   Författare :Ling Hai; Mats Leijon; Rafael Waters; Lars-Göran Westerberg; Uppsala universitet; []
   Nyckelord :wave energy; hydrodynamic modelling; electric circuit; force and power analysis;

   Sammanfattning : Ocean wave energy can be harnessed and converted into electric energy nowadays. This provides a possibility for populations that live on islands or along coastlines to utilize the renewable and safe power produced by ocean waves. LÄS MER