Search for dissertations about: "dynamic load for power system"

Showing result 11 - 15 of 76 swedish dissertations containing the words dynamic load for power system.

  2. 11. Coordinated Voltage Control in Electric Power Systems

    Author : Mats Larsson; Lunds universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics and Electrical technology; trees.; search methods; control; predictive; voltage control; power system dynamic stability; Modelica; ObjectStab; multi-machine power system; voltage stability; object oriented methods; modelling; simulation; describing function analysis; tap changer; limit cycle; Elektronik och elektroteknik; Electrical engineering; Elektroteknik;

    Abstract : This thesis deals with various aspects of coordinated voltage control in electric power systems. It consists of an introduction and six papers. The introduction contains a summary of the thesis and tutorials on voltage control and the search methods that have been applied. READ MORE

  4. 12. Long-term Voltage Stability in Power Systems - Alleviating the Impact of Generator Current Limiters

    Author : Stefan Johansson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rotor thermal overloading; dynamic load modelling; voltage stability; field current limiter; active power rescheduling; overexcitation limiter; armature current limiter; long-term power system dynamic stability;

    Abstract : The main issues in this dissertation are the behaviour of current limiters protecting synchronous generators, and the interactions that occur with other components in the power system during a voltage instability. The importance of these limiters for the voltage stability is shown both in the analysis of small models and in the simulations of larger networks. READ MORE

  5. 13. Dynamic Security Region Assessment

    Author : Marina Oluic; Mehrdad Ghandari; Bertil Berggren; Jovica V. Milanovic; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; parametrization; power system transient stability; security boundary; short-term voltage instability; Voltage Impasse Region VIR ; parametrisering; spänningsimpassregion VIR ; spänningsinstabilitet; säkerhetsgräns; transient stabilitet i kraftsystem; Electrical Engineering; Elektro- och systemteknik;

    Abstract : Among a wide variety of topics that are covered by Dynamic Security Assessment (DSA), maintaining synchronous operation and acceptable voltage profiles stand out. These two stability categories are mostly jeopardized in the seconds after a large contingency occurs. READ MORE

  6. 14. Towards Intelligent Distribution Systems: Solutions for Congestion Forecast and Dynamic State Estimation Based Protection

    Author : Ankur Srivastava; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; future-readiness; renewables.; future distribution systems; distribution systems protection; distribution system operator; photovoltaics; probabilistic power flow; Congestion forecast; dynamic state estimation;

    Abstract : The electrical distribution systems are undergoing drastic changes such as increasing penetration level of distributed renewable energy sources, energy storage, electrification of energy-efficient loads such as heat pumps and electric vehicles, etc., since the last decade, and more changes are expected in the future. READ MORE

  7. 15. Modelling and Control of Doubly Fed Induction Generators in Power Systems : Towards understanding the impact of large wind parks on power system stability

    Author : Katherine Elkington; Lennart Söder; Evert Agneholm; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electric power engineering; Elkraftteknik;

    Abstract : The rapid development of wind power technology is reshaping conventional power grids in many countries across the world. As the installed capacity of wind power increases, its impact on power grids is becoming more important. READ MORE