99 uppsatser · sida 1 av 7
The power system modelled in this thesis work has been developed for simulationwhen e.g. the production in some part of the power system is changed. The powersystem has been modelled according to the swing mass of the system, the frequencydependency of the load and the turbine …
This master thesis was made to validate hydropower models of a turbine governor, Kaplan turbine and a Francis turbine in the power system simulator ARISTO at Svenska Kraftnät. The validation was made in three steps. The first step was to make sure the models was implement …
… manifold at each bank connected to a twin entry turbine (8-2-2). A study in GT-Power has shown improved performance and reduced cylinder to cylinder variations using two manifolds at each bank in combination with a single entry turbine (8-4-1). This thesis work analyses the …
Kan Orust bli självförsörjande på förnybar el?
… of vacationer. The total electricity demand is 174 GWh a year with a maximum power need of 32 MW. This report presents an analysis for the plausibility of their plan and from a power system stability perspective, the effects on the electrical grid. The conclusion is that the …
… JAS 39 Gripen, since money and time can be saved. The Auxiliary and Emergency Power System, AEPS, is a subsystem of the secondary power system in Gripen. It has the function of providing the aircraft with electrical and hydraulical power before activation and after deactivation …
… play a vital role in both static and dynamic stability assessment of electric power systems and the foreseeing of voltage collapse. Simulations performed by Svenska Kraftnät (SvK) are mainly done in the specialized voltage collapse predicting software tool, SPICA and the more …
? En utredning med fokus på spänningsvariationer och osymmetri inom landsbygds- och tätortsnät vid en- och trefasanslutning av solcellsanläggningar
A good power quality can be an important prerequisite to achieve a sustainable society. Scandinavia's electrical system is in many respects superior, and Sweden has a fossil free electricity generation at 97 % and a reliability of electricity distribution at 99.98 %. Meanwhile …
… detailed description of how the frequency regulation isperformed in the Nordic power system.The simulations are performed using the analysis program Power System Simulator forEngineering (PSS/E). The Nordic32 power system is used for the simulations, this is asystem with 32 …
… is (together with the other transmission system operators of the Nordic power system) responsible for keeping balance between the generated and demanded power in the Nordic power system. Spontaneous load variations and system disturbances, however, lead to power imbalance …
In this thesis, the Train Power System Simulator (TPSS) has been compared and verified with the commercial simulator TracFeed® Simulation (TracFeed). The basis for the comparison was a given part of the Swedish railway system, with steel transportation trains. Primarily …
The supply of uninterruptible power can be applied to many areas where continuous operation is highly prioritized. The application of uninterruptible power for motor operation is facilitated using a frequency converter. Direct current operated frequency converters can be applied …
The purpose of this master thesis is to implement and validate a Power System Stabilizer (PSS) to a generator at Trängslet hydropower station in Dalarna, Sweden. Problems with local rotor oscillations can occur at the hydropower station when power is transferred on a new power …
… where each electricity commodity is equivalent to a mix of different power sources. Examples of these commodities are pure bio electricity, pure hydro electricity, pure wind electricity and gray electricity. Gray electricity is an unspecified mix of different power sources where …
utveckling av en beräkningsmodell med simuleringsverktyget IPSEpro
Heat and power stations are often in need of optimizations. A simulation model is a tool for findingways to optimize the plant. The scope of this diploma work is to develop a simulation model ofBoiler 5 at Mälarenergi AB. Boiler 5 is a circulated fluidized bed boiler that was …
The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication …
