Corrective Load Adjustments for Unsolvable Power Flows

This paper presents a methodology to determine corrective adjustments in the demand when the power flow equations have no solution. This is formulated as a constrained optimization problem, which has the flexibility to select the buses that have load adjustment and those whose demand will be preserved. Useful information about the buses with major effects on the infeasibility of the power flow solutions is provided. A modified version of Newton´s optimization method, which applies Gauss-Newton iterates and a step length control, is used to solve this optimization problem. The efficiency of the proposed strategy is assessed with power systems ranging from 14 to 1916 buses.