Title :
Modular modelling of combined AC and DC systems in dynamic simulations
Author :
Aristidou, Petros ; Papangelis, Lampros ; Guillaud, Xavier ; Van Cutsem, Thierry
Author_Institution :
Dept. of Elec. Eng. and Comp. Science, University of Liège, Belgium
fDate :
June 29 2015-July 2 2015
Abstract :
A formulation is proposed in which an AC-DC system is modeled as a combination of AC grids, DC grids, injectors, AC two-ports and AC/DC converters, respectively. This modular modelling facilitates the dynamic simulation of future complex AC/DC systems. Furthermore, it can be exploited by the solver, which performs less operations on components with lower dynamic activity, and offers parallel processing of the time simulation. This approach is illustrated on a test system in which a multi-terminal DC grid connects two asynchronous AC systems, allows frequency support between them, and acts as emergency control against AC voltage instability.
Keywords :
Computational modeling; Frequency control; Generators; HVDC transmission; Mathematical model; Matrix converters; Sparse matrices; AC/DC systems; Schur complement; Time simulation; domain decomposition methods; multi-terminal DC system; parallel processing; phasor approximation;
Conference_Titel :
PowerTech, 2015 IEEE Eindhoven
Conference_Location :
Eindhoven, Netherlands
DOI :
10.1109/PTC.2015.7232324
