Secondary voltage and reactive power control using artificial neural networks (ANN) aims at setting the reference values for the automatic voltage controllers in the EPS. It is based on autonomous local controllers that use local information in the controlled node, and for its operation does not need a supervisory, tertiary voltage control signal. The patent envisions an improved definition of the optimal ANN topology, faster ANN learning and faster convergence.
F.33 Slovenian patent
COBISS.SI-ID: 8239956Phase shifting transformer (PST) Divača considerably impacts power flow situation in Europe, as well as in power station. As it is manufactured in the form of two units, there dilemmas existed regarding its operation. In the study the operating states and acceptable operation modes have been considered and the operating procedures proposed. They are required when putting the device into operation. PST Divača is connected into Slovenian power system since middle 2010 and till now it met all expectations.
F.02 Acquisition of new scientific knowledge
COBISS.SI-ID: 7881300In doctoral thesis Uroš Kerin describes methods for dynamic security assessment of EPS. Methods are based on calculations of indices, taking into account limits of power systems. As the input data the simulation results or measured data can be used. Proposed indices are combined into composite index which allows helps operators to monitor the power system. The results of the research work described in the thesis, served as the basis for the development of the dynamic security assessment tool "SiGuard DSA" by Siemens AG.
D.09 Tutoring for postgraduate students
COBISS.SI-ID: 7765844The main purpose of the project was to analyze and compare investments in nuclear and renewable energy resources from the technical, economic and environmental point of view. The project’s main focus was a detailed comparison between scenarios of different options of integration of the new block in the Krško nuclear power plant (JEK 2) and scenarios of moderate and high implementation of distributed energy resources.
F.02 Acquisition of new scientific knowledge
COBISS.SI-ID: 8244820A method for managing the responsibility for harmonic distortion at the point of common coupling between a customer and a utility is presented in the dissertation of Tomaž Pfajfar. The proposed approach is based on the harmonic current vector method and uses reference impedances. The method enables harmonic contribution determination when the actual harmonic customer impedances are not known. It also improves the evaluation of harmonic distortion in resonance conditions. The method is verified by means of computer simulation and field measurements. The supervisor is prof. dr. Igor Papič.
D.09 Tutoring for postgraduate students
COBISS.SI-ID: 6909780