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23 April 2024 |
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Article overview
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Stability of Synchrony against Local Intermittent Fluctuations in Tree-like Power Grids | | Sabine Auer
; Frank Hellmann
; Marie Krause
; Jürgen Kurths
; | | Date: |
28 Feb 2017 | | Abstract: | 80% of all Renewable Energy Power in Germany is installed in tree-like
distribution grids. Intermittent power fluctuations from such sources introduce
new dynamics into the lower grid layers. At the same time, distributed
resources will have to contribute to stabilize the grid against these
fluctuations in the future. In this paper, we model a system of distributed
resources as oscillators on a tree-like, lossy power grid and its ability to
withstand desynchronization from localized intermittent renewable infeed.
We find a remarkable interplay of network structure and the position of the
node at which the fluctuations are fed in. An important precondition for our
findings is the presence of losses in distribution grids. Then, the most
network central node splits the network into branches with different influence
on network stability. Troublemakers, i.e. nodes at which fluctuations are
especially exciting the grid, tend to be downstream branches with high net
power outflow. For low coupling strength, we also find branches of nodes
vulnerable to fluctuations anywhere in the network. These network regions can
be predicted at high confidence using an eigenvector based network measure
taking the turbulent nature of perturbations into account.
While we focus here on tree-like networks, the observed effects also appear,
albeit less pronounced, for weakly meshed grids. On the other hand the observed
effects disappear for lossless power grids often studied in the complex systems
literature. | | Source: | arXiv, 1702.8707 | | Services: | Forum | Review | PDF | Favorites | |
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