Estimation of actual value for the invalid
telemetry is very essential for the system operation
point of view for critical devices. So SCADA
telemetry failure of selected data in the observable
network, state estimation computes such values
from redundant SCADA data and the same is
available to system operator for grid control and
monitoring purpose. It provides the tools for running
optimal power flow based on the state estimation
data and determination of security assessment of the
grid through contingency analysis. This feature is
very critical during critical grid operating condition
to know the security of the grid operation. Similarly
reliability and security status of the grid is
continuously computed and monitored through
parameters like axes angular displacement and gate
flow from the on-line power flow solution as given
in Fig-7