Sökning: "Unbalanced operation"

Visar resultat 6 - 10 av 18 avhandlingar innehållade orden Unbalanced operation.

  1. 6. On the dynamics of an hydropower generator subjected to unbalanced magnetic pull : characterisation and analysis

    Författare :Yogeshwarsing Calleecharan; Rolf Gustavsson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics;

    Sammanfattning : Eccentricity leading to unbalanced magnetic pull (UMP) in rotating electrical machines is a significant concern in industry. The UMP arises due to magnetic flux crossing the air-gap between the rotor and stator, and can be more intense than the useful peripheral force that the machine develops. LÄS MER

  3. 7. Contributions to the electromechanics of unbalanced magnetic pull in a synchronous hydropower generator

    Författare :Yogeshwarsing Calleecharan; Timo Holopainen; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics;

    Sammanfattning : Misalignment between the rotor geometrical axis and the geometrical stator axis in a hydropower generator is usually present at standstill and when the machine is under operation. Now, rotor-stator eccentricity in a rotating electrical machine is a harbinger to abnormal operating conditions of the machine. LÄS MER

  4. 8. Operation, Monitoring, and Protection of Future Power Systems: Advanced Congestion Forecast and Dynamic State Estimation Applications

    Författare :Ankur Srivastava; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; distribution system operator; future distribution systems; smart grid solutions.; photovoltaics; Congestion forecast; probabilistic power flow; power system protection; future-readiness; energy transition; phasor measurement unit; renewable energy; experimental validation; dynamic state estimation;

    Sammanfattning : The electrical power systems are undergoing drastic changes such as increasing levels of renewable energy sources, energy storage, electrification of energy-efficient loads such as heat pumps and electric vehicles, demand-side resources, etc., in the last decade, and more changes will be followed in the near future. LÄS MER

  5. 9. On control of cascaded H-bridge converters for STATCOM applications

    Författare :Ehsan Behrouzian; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cascaded H-bridge converters; FACTS.; Modular Multilevel Converters MMC ; STATCOM;

    Sammanfattning : Cascaded H-bridge (CHB) converters are today considered the industrial standard for STATCOM applications, mainly due to their small footprint, high achievable voltage levels, modularity and reduced losses. However, there are still areas of research that need to be investigated in order to improve the performance and the operational range of this converter topology for grid-applications. LÄS MER

  7. 10. Control of Static Series Compensator for Mitigation of Power Quality Problems

    Författare :Hilmy Awad; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Power Electronics and Advanced Control technologies have made it possible to mitigate the power quality problems and maintain the operation of sensitive loads. Among power system disturbances, voltage dips, swells, and harmonics are some of the severe problems to the critical industrial loads. LÄS MER