Disputas: Liubomyr Vytvytskyi

Stipendiat Liubomyr Vytvytskyi ved Fakultet for teknologi, naturvitenskap og maritime fag, holder prøveforelesning og disputas over sin avhandling 'Dynamics and model analysis of hydropower system'.


06 Sep

Praktisk informasjon

  • Dato: 6. september 2019
  • Tid: kl. 13.00 - 15.00
  • Sted: Porsgrunn, Auditorium A-271
  • Til å bedømme avhandlingen er det oppnevnt:

    • Første opponent: Professor Francesco Casella, Politecnico di Milano
    • Andre opponent: Dr. Bjarne Børresen, Multiconsult AS
    • Administrator av komiteen: Førsteamanuensis Elin Fjeld, USN                                                 

    Hovedveileder for doktorgradsarbeidet har vært professor Bernt Lie, USN, og biveileder har vært førsteamanuensis Roshan Sharma, USN.

    Prøveforelesning vil bli holdt i Auditorium A-271 ved USN, campus Porsgrunn, 06.09.2019, kl. 10.00. Tema for prøveforelesning:

    “Basic control of hydropower plants”

    Disputas avholdes samme sted, Auditorium A-271 ved USN, campus Porsgrunn, 06.09.2019, kl. 13.00.

    Prøveforelesning og disputas er åpen for alle interesserte.

Disputas: Liubomyr VytvytskyiOm avhandlingen (engelsk)

Globalization and growth in energy consumption in combination with climate challenges, make the use of sustainable energy production a necessity. Important sustainable energy sources (solar, wind) have highly changing production, and hydropower from high head water reservoirs is a possible energy source for balancing out this variation in power generation. The combination of several energy types as well as counteracting the frequently changing energy production make energy management and control much more challenging; optimal energy production will require advanced control based on detailed system models. That is why this research work has explored hydropower mathematical modelling and simulation with the emphasis on hydropower library development using open-source software. In addition, the study and development of various analysis tools for hydropower models have been performed using open-source software as well.

In this work, mathematical models for various units of a hydropower system are presented and assembled in a hydropower Modelica library — OpenHPL. The library can be used in an open-source software OpenModelica, which makes it freely and widely available. The OpenHPL makes it possible to model different hydropower systems and connect them with models from other libraries, e.g., with models of the power system or other power generating sources. This synergy of our library with other Modelica libraries makes it possible to model the hydropower system starting from precipitations/ reservoir to final consumer of electricity. In order to ensure an accuracy of the developed models, the library has been applied to model the actual hydropower plant (Trollheim plant, Surnadal, Norway), and the simulation results have been compared and validated with the real experimental data for key quantities.

When validated, a model can be used as a digital twin of the system, for process or equipment monitoring, diagnosis, and prognosis. In addition, the model can be used for analyzing the control system, or for developing more advanced control algorithms or methods for indirect measurements. In this thesis, various model analysis tools are implemented and tested for the OpenHPL hydropower models using open-source scripting languages Python and Julia.