Adjoint Network Sensitivity Based State Variable Evaluation for Large Scale Contingency Events

Abstract This paper addresses the determination of the power system state variables, the complex bus voltages, based on the concept of adjoint networks and Tellegen's theorem. First-order sensitivities are derived and accuracy enhancements proposed to extend the validity of the state variable evaluations to cases where large-scale perturbations occur in the network. Practical implementation issues are addressed. Finally, numerical examples are provided for illustration purposes.