METHOD FOR COMPUTER-ASSISTED PARAMETERISATION OF A CONVERTER IN AN ELECTRICAL GRID

摘要

The invention relates to a method for computer-assisted parameterisation of a converter in an electrical grid. In a step a) modelling of an output current (Igrid) of the converter occurs, which is output into an AC sub-grid (GR) of the electrical grid, as a function of a predefined reference current (Iref) and a supplied disturbance voltage (Vdist) based on a model which describes the operation of the converter and comprises a plurality of parameters (K) of the converter. In a step b) a predefined subsequent behaviour (RT) of the output current (Igrid) of the converter is modelled, wherein the predefined subsequent behaviour (RT) reproduces how the output current (Igrid) follows the reference current (Iref), and wherein in a first frequency interval in the environment of a predefined nominal frequency (NF) of the AC sub-grid (GR) the subsequent behaviour (RT) is determined such that the output current (Igrid) corresponds to the reference current (Iref). In a step c) a predefined disturbance reduction (DR) is modelled which describes the reduction of the supplied disturbance voltage (Vdist), wherein the disturbance reduction (DR) is designed such that the effect of the disturbance voltage (Vdist) on the output current (Igrid) in a second frequency interval which is above the nominal frequency is smaller than a predefined threshold. Finally, in a step d) values are determined for the plurality of parameters (K) of the converter by solving an optimisation problem on the basis of an optimisation target which corresponds to the attaining of the subsequent behaviour (RT) and the disturbance reduction (DR).