  This paper develops a new analytical model to estimate real-time variations
in grid frequency and voltages resulting from dynamic network reconfiguration
(DNR). In the proposed model, switching operations are considered as discrete
variations in an admittance matrix, leading to step variations in node
injection currents. The network model with discrete admittance variations is
then integrated with dynamic models of synchronous generators and
voltage-dependent loads, enabling analysis of the dynamic grid operations
initiated by the DNR. Case studies are performed to validate the proposed model
via comparison with a conventional model and a comprehensive MATLAB/SIMULINK
model.
