Search for dissertations about: "substation"

Showing result 1 - 5 of 53 swedish dissertations containing the word substation.

  2. 1. District Cooling – Towards Improved Substation Performance

    Author : Maria Jangsten; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; control strategy; heat exchanger; district cooling; HVAC; operational data; energy transfer station; substation; low delta-T; high temperature district cooling;

    Abstract : The global cooling demand in buildings is rapidly increasing and to supply this demand, district cooling is one solution. However, many district cooling systems suffer from low delta-Ts (receiving low return temperatures from the buildings connected to the system). READ MORE

  4. 2. Ocean Wave Energy : Underwater Substation System for Wave Energy Converters

    Author : Magnus Rahm; Mats Leijon; Ted Brekken; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wave energy; wave power; wave energy converter; direct-drive; permanent magnet linear generator; point absorber; array; farm; park; offshore; marine; substation; electrical transmission system; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Abstract : This thesis deals with a system for operation of directly driven offshore wave energy converters. The work that has been carried out includes laboratory testing of a permanent magnet linear generator, wave energy converter mechanical design and offshore testing, and finally design, implementation, and offshore testing of an underwater collector substation. READ MORE

  5. 3. Thermal Study of a Submerged Substation for Wave Power

    Author : Antoine Baudoin; Cecilia Boström; Didier Saury; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wave power; marine substation; heat transfer; natural convection; CFD; FEM; thermal management;

    Abstract : At the Division of Electricity of Uppsala University, a wave power concept is being developed.It relies on wave energy converters, one buoy and one linear generator placed on the seabed, connected together to a submerged substation. The mechanical design is kept as simple as possible to ensure reliability. READ MORE

  6. 4. Distributed Signal Processing in Digital Substations : Integrating High Sampling Rate Measurements at the Process-Level

    Author : Fabian Hohn; Lars Nordström; Peter Crossley; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Communication networks; digital signal processing; digital substation; field-programmable gate array; filter design; IEC 61850; IEC 61869; power system protection; substation automation; Electrical Engineering; Elektro- och systemteknik;

    Abstract : Future power systems will be dominated by power electronic (PE) converter connected generation. This trend is primarily driven by the increasing penetration of wind power as well as the increasing integration of photovoltaic (PV) based generation. READ MORE

  7. 5. Fjärrvärmekunders värme- och effektbehov: analys baserad på mätresultat från femtio byggnader

    Author : Stefan Aronsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; district heating; small scale combined heat and power; building; measurement; domestic hot water; total heat consumption; substation;

    Abstract : An extensive measuring project has been carried out by Gothenburg Energy which operates the Gothenburg district heating system. Over a period of 18 months, heat loads, water flows, temperatures, etc., were measured at 15 minute intervals at 50 substations. READ MORE