Search for dissertations about: "GENERATOR excitation system"
Showing result 1 - 5 of 10 swedish dissertations containing the words GENERATOR excitation system.
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1. Hydropower generator and power system interaction
Abstract : After decades of routine operation, the hydropower industry faces new challenges. Large-scale integration of other renewable sources of generation in the power system accentuates the role of hydropower as a regulating resource. READ MORE
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2. A New Paradigm for Large Brushless Hydrogenerators : Advantages Beyond the Static System
Abstract : The grid code, FIKS, from the Norwegian transmission system operator (TSO), Statnett, states that synchronous generators > 25MVA, must have a static excitation system. However, an improved brushless excitation system is in operation on some commercial power plants (36MVA, 93.75rpm & 52MVA, 166. READ MORE
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3. Fast-response rotating brushless exciters for improved stability of synchronous generators
Abstract : The Norwegian Network Code FIKS from the Norwegian Transmission System Operator (TSO) Statnett, states that synchronous generators ≥ 25 MVA must have a static excitation system. It also includes requirements on the step time response and the available field winding ceiling voltage of the excitation system. READ MORE
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4. Modelling and analysis of multiphysical interactions in hydropower rotor systems
Abstract : In this thesis the objective is to develop rotordynamical models of hydropower units, where coupling between mechanical, electromagnetic and fluid dynamical system systems is of certain interest. Both fluid-rotor and electromechanical interactions are known to change the system coefficients of the rotor system, which affects eigenfrequencies, damping, stability and response. READ MORE
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5. Transient Electricomechanical Analysis of Hydropower Generators Using Field and Circuit Models
Abstract : The large-scale conversion of the electrical energy system to incorporate other renewable sources of power, concurrently with vast refurbishment of the present machinery, brings the Swedish hydropower industry face to face with new challenges. Introduction of new technical solutions in systems originally designed for a slightly different purpose implies that fundamental conceptions need to be questioned. READ MORE