Sökning: "wind supply"

Visar resultat 11 - 15 av 83 avhandlingar innehållade orden wind supply.

  1. 11. Opening the black box of material criticality : heterogeneity and interrelations of companies within and across industrial sectors

    Författare :Yulia Lapko; Cali Nuur; Paolo Trucco; Aristides Matopoulos; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Critical materials; Identification; Mitigation; Company; Supply chain; Inter-sectoral competition; Buyer-supplier power relations; Industriell ekonomi och organisation; Industrial Economics and Management;

    Sammanfattning : The concept of ‘material criticality’ has been introduced to examine availability and accessibility of natural resources that underlie industrial competitiveness and deployment of strategic technologies, such as electric mobility or wind turbines. The academic and policy discourse conceptualised material criticality rather as a black box, assuming industrial sectors to be monolithic, homogeneous and independent entities, neglecting complexity of the company dimension. LÄS MER

  3. 12. Efficient Integration of Distributed Generation in Electricity Distribution Networks - Voltage Control and Network Design

    Författare :Ingmar Leisse; Industriell elektroteknik och automation; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Coordinated Voltage Control; Distributed Generation; Electricity meter; PV; Wind Power; Distribution Network;

    Sammanfattning : Distributed generation (DG), i.e. generation connected to the low and medium voltage distribution network (DN), has been increasing a lot during recent years. Thus the traditional assumption of a unidirectional power flow and a voltage decrease along the distribution feeders is no longer valid in all operation conditions. LÄS MER

  4. 13. Disturbance regimes in dry sandy grasslands – past, present and future

    Författare :Anja Ödman; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Grassland conservation; sand steppe; land use history; conceptual model; soil disturbance; lime; nutrient availability; vascular plants; bryophytes; ground beetles; propagule supply;

    Sammanfattning : A number of sandy grassland habitats of interest for biodiversity conservation can be found in Europe. One such habitat is the threatened xeric sand calcareous grassland, which is home to a large number of endangered species. LÄS MER

  5. 14. Infrastructural requirements for indirect and direct electrification of road transportation

    Författare :Therese Lundblad; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydrogen supply; electric vehicles; hosting capacity; low-voltage grid; home charging; hydrogen infrastructure; charging strategies;

    Sammanfattning : This thesis analyzes the integration of electricity and transportation systems for a future in which transportation is increasingly electrified. The focus is on exploring the infrastructures required for the indirect electrification of heavy transportation and the direct electrification of passenger vehicles. LÄS MER

  7. 15. Aspects on Wind Turbine Protections and Induction Machine Fault Current Prediction

    Författare :Marcus Helmer; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; saturation; Induction generator; Short circuit currents; Slip ring Generator; skin effect;

    Sammanfattning : This thesis presents detailed modelling of the induction machine with the main objective being accurate fault current prediction. The thesis focus mainly on mains connected induction machines and the response due to severe disturbances in the supply voltage, such as three-phase short-circuit faults. LÄS MER