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53256 Power Electronics in AC Networks.
Danish title: Effektelektronik i elforsyningen

Type: Å, Language: D
Credit points: 5 point
Offered by: Department of Electric Power Engineering (ELTEK)
No credit points with: C4711
Prerequisite: 50280 /45120/C5310/C4710
Recommended semester: 6th - 8th semester
Scope and form: Lectures and exercises.
Examination: Evaluation of report(s) (13 point scale )
Contact person: Arne Hansen, ELTEK, Building 325, Tel. +45 4525 3602
Aim: The course is designed to give the students insight in the application of power electronics in the electric power supply, for example HVDC (High Voltage Direct Current Transmission Systems), dynamic compensation of reactive power, improvement of the curve shape, circuits for distribution of the power in the distribution network, and circuits for the improvement of dynamic stability. The course further allows the students to design power electronic circuits for very high power applications in order to assess the limits of power and working frequencies that dermine such properties as can be obtained by using the circuits in the disrtibution network.
Contents: Description of functioning and properties for various semiconductor components which may be used as electronic switches in power electronics. The arguments for using HVDC-systems and a description fundamental properties of line-commutated converters that are used in HVDC. Discussion of the possibilities of simulating HVDC-system influence on the distribution network. Description and comparison of different snubber circuits for self-commutated converters intended for high power usage. Design of three-phase converters for applications in power electronics in the distribution network. Series- and parallel configuration of converters with associated possibilities of reducing higher harmonic currents or voltages. Description of possible applications of power electronics to compensate for the reactive power in the distribution network. Discussion of the possibility of controlling the power-flow and line voltage. Further presentations include the possibilities of simulating these and other circuits with the intention of predicting the effect of such power circuits on e.g. the dynamic stability of the network. Discussion of driver circuits for various power semiconductors.