Jorge Cortés
Professor
Cymer Corporation Endowed Chair
Distributed bilayered control for transient frequency safety
and system stability in power grids
Y. Zhang, J. Cortés
IEEE Transactions on Control of Network Systems 7 (3) (2020), 1476-1488
Abstract
This paper considers power networks governed by swing nonlinear
dynamics and subject to disturbances. We develop a bilayered
control strategy for a subset of buses that simultaneously
guarantees transient frequency safety of each individual bus and
asymptotic stability of the entire network. The bottom layer is a
model predictive controller that, based on periodically sampled
system information, optimizes control resources to have transient
frequency evolve close to a safe desired interval. The top layer is
a real-time controller assisting the bottom-layer controller to
guarantee transient frequency safety is actually achieved. We show
that control signals at both layers are Lipschitz in the state and
do not jeopardize stability of the network. Furthermore, we
carefully characterize the information requirements at each bus
necessary to implement the controller and employ saddle-point
dynamics to introduce a distributed implementation that only
requires information exchange with up to 2-hop neighbors in the
power network. Simulations on the IEEE 39-bus power network
illustrate our results.
pdf
Mechanical and Aerospace Engineering,
University of California, San Diego
9500 Gilman Dr,
La Jolla, California, 92093-0411
Ph: 1-858-822-7930
Fax: 1-858-822-3107
cortes at ucsd.edu
Skype id:
jorgilliyo