Simulation of Load and Fault Scenarios in a Hydro Power Systems with Island Grid. Kim Aars Master's Thesis.
abstract   bibtex   
The Westfjords area of Iceland is only connected to the national grid by one transmission line. Due to harsh weather conditions during winter, the reliability of power supply is bad. Two models of the transmission system of the Westfjords were models using OpenIPSL, one base model with three generating units and one extended model with four generating units. Two different load scenarios are simulated. From simulations of the disconnection from the national grid, it is found that the extended model, in Scenario 1 will stabilize the system without disconnection any loads. In scenario 2, the model with increased production returns to steady state slower than the three generator model, but will keep the voltage levels on the buses more stable and at a higher voltage level. Another important factor regarding operation of hydro power units, is the water hammer effect caused by rapid changes in the penstock flow rate. Waterway models were made using Hydro Power Library in Dymola, the models are used for finding optimal closing time for the turbine guide vanes/nozzles of the three generation units at Mjólká. From simulations, it is found that the closing times can be considerably reduced for all three units.
@thesis{KimAars2017,
  title = {Simulation of Load and Fault Scenarios in a Hydro Power Systems with Island Grid},
  author = {{Kim Aars}},
  date = {2017-05-15},
  institution = {{University College of Southeast Norway}},
  location = {{Porsgrunn}},
  abstract = {The Westfjords area of Iceland is only connected to the national grid by one transmission line. Due to harsh weather conditions during winter, the reliability of power supply is bad. Two models of the transmission system of the Westfjords were models using OpenIPSL, one base model with three generating units and one extended model with four generating units. Two different load scenarios are simulated. From simulations of the disconnection from the national grid, it is found that the extended model, in Scenario 1 will stabilize the system without disconnection any loads. In scenario 2, the model with increased production returns to steady state slower than the three generator model, but will keep the voltage levels on the buses more stable and at a higher voltage level. Another important factor regarding operation of hydro power units, is the water hammer effect caused by rapid changes in the penstock flow rate. Waterway models were made using Hydro Power Library in Dymola, the models are used for finding optimal closing time for the turbine guide vanes/nozzles of the three generation units at Mjólká. From simulations, it is found that the closing times can be considerably reduced for all three units.},
  annotation = {Master's thesis},
  file = {/home/dietmarw/FoU/Publications/zotero/storage/6I4ED38G/Simulation of load and fault scenarios in a hydro power systems with island grid 152558.pdf},
  type = {Master's Thesis}
}

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