Real-time Implementation of Synchrophasor Based Linear State Estimator in OPAL-RT HYPERSIM

​Real-time monitoring of system behavior is an integral part of modern power system operation and control. With the increasing demand, it is becoming  critical  and very essential to monitor system states for quick decisions to prevent the  cascading  blackout.  Availability of phasor measurement units (PMUs)  has  been proven  a  cornerstone  for real-time monitoring of the system at some of the specific locations, where these  devices  are  placed.  However, higher cost and required communication  infrastructure  limit  the placement of PMUs at some optimal places only. Although many research works have been done  for PMU based linear state estimator (LSE), online implementation and validation of various estimation algorithms at control centers  are yet  to  be fully established. This paper presents the  systematic  procedure of digital simulation in the OPAL-RT  HYPERSIM,  generation of the  IEEE  C.37-118 protocol compliant  synchronized measurements, and validation of state estimation algorithms in the real-time environment.