Impedance Mapping in Smart Grids with Dynamic Mode Decomposition

Authors

Baltas G.N., Lai N.B., Sabillon C., Cao J., Rodriguez P.

Reference

2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022, 2022

Description

Power Electronics Interfaced Resources can contribute in power oscillation damping via active/reactive power modulation. To do so effectively their relative electrical location needs to be identified. This paper presents a novel approach based on Dynamic Mode Decomposition (DMD) to estimate the electrical distance between a bus and the oscillation sources. The DMD makes use of wide area measurements to determine the dominant mode and its shape. The oscillation sources are identified from the mode shape, while the L2 norms between them and the rest of the vectors are computed to obtain the normalized measure of distance. Such information is crucial for determining whether active or reactive power modulation should be used. In contrast to other works the proposed approach assumes no knowledge of the system model or parameters. The analysis is conducted on the two area system and the IEEE 39-Bus test system where it is shown that the DMD can identify correctly the dominant mode and that the estimated DMD eigenvector approximates the system physical structure. Obtained results are validated by analysing frequency deviation between the buses at the source and center.

Link

doi:10.1109/ECCE50734.2022.9947888