Grid Topology Control Unlocks Underused Flexibility for Renewables

Power grids face mounting stress from renewable energy integration and worsening climate impacts. While demand- and generation-side flexibility have been widely studied, this paper argues that network-side flexibility—particularly the ability to dynamically rewire the grid’s topology—remains vastly underused. Recent advances in communication infrastructure, power electronics, and circuit breakers make it possible to control the physical connections of transmission and distribution lines on the fly. However, leveraging that flexibility introduces hard technical problems: the underlying optimization and control are inherently non-convex and involve hybrid (discrete-continuous) dynamics.

The monograph, authored by Tong Han, Yan Xu, and David J. Hill, provides a comprehensive survey. It begins with fundamental topological constraints, then separates steady-state topology control for both transmission and distribution networks, reviewing classic methods and recent advances. A key new focus is the network topology transition problem—how to safely and efficiently move from one optimal topology to another. Beyond steady-state operation, the paper covers transient control, including intentional controlled islanding (splitting the grid to prevent cascading failures) and emerging topology control methods for microgrid stabilization. The work positions topology control as a critical, yet underexploited, lever for future grid resilience.