  Extreme voltages at the system nodes are one of the primary causes for total
and partial collapse of the Nigerian grid. In this paper, we develop a
framework to re-dispatch the voltage set-points of committed generators in the
grid to improve the voltage profile of the system nodes thus lowering the
likelihood of a grid collapse. This framework is an extension of
circuit-theoretic formulation that can robustly solve general-purpose grid
optimization problems. In the results section, we re-dispatch the voltage
setpoints for committed generators in real-life Nigerian grid operation and
planning test cases to improve the overall voltage profile of the grid. We
further demonstrate that the re-dispatched grid is more resilient and secure
than the base case through running contingency analyses.
