Our paper exploring robustness tradeoffs of the swing equations [1] has been accepted to the 23rd International Symposium on Mathematical Theory of Networks and Systems.

[Bibtex] [Abstract] [Download PDF]

Electro-mechanical oscillations in power systems are typically controlled by simple decentralised controllers. We derive a formula for computing the delay margin of such controllers when the power system is represented by a simple mechanical network. This formula reveals a clear trade-off between system damping, inertia, and robustness to delays. In particular, it shows that reducing system inertia, which is a common consequence of increased renewable generation, can reduce robustness to unmodelled dynamics.

```
@inproceedings{pm2018mtns,
abstract = {Electro-mechanical oscillations in power systems
are typically controlled by simple decentralised controllers.
We derive a formula for computing the delay margin of such
controllers when the power system is represented by a simple
mechanical network. This formula reveals a clear trade-off
between system damping, inertia, and robustness to delays. In
particular, it shows that reducing system inertia, which is a
common consequence of increased renewable generation, can
reduce robustness to unmodelled dynamics.},
author = {Pates, Richard and Mallada, Enrique},
booktitle = {23rd International Symposium on Mathematical Theory of Networks and Systems},
grants = {CPS:1544771, ARO:W911NF-17-1-0092, 1711188, CAREER-1752362},
month = {7},
title = {Damping, Inertia, and Delay Robustness Trade-offs in Power Systems},
url = {https://mallada.ece.jhu.edu/pubs/2018-MTNS-PM.pdf},
year = {2018}
}
```