The effect of time-delayed measurements on a PMU-based state estimator

The complete integration of the Synchronized Measurement Technology (SMT) in the power systems will bring about fundamental changes to the applications of the control center. One of the natural applications of the SMT is the state estimation. Although the state estimator is used for monitoring the steady state operating condition, it is envisioned that in the near future, a PMU-based state estimator will be able to monitor the dynamic behavior of the power system states. In such an application, the transfer delay of the PMU measurements should not be ignored. In this work, the effect of the PMU measurements transfer delay on the accuracy of a PMU-based state estimator is examined. Further, the optimal waiting time of the Phasor Data Concentrators (for sending information to the control center), and the time execution of a PMU-based state estimator for capturing accurately the state transients during fault conditions are also examined.

[1]  Moustafa Chenine,et al.  Analysis of data quality issues in Wide Area Monitoring and Control systems , 2010, 2010 IREP Symposium Bulk Power System Dynamics and Control - VIII (IREP).

[2]  Kun Zhu,et al.  Examination of data delay and packet loss for wide-area monitoring and control systems , 2012, 2012 IEEE International Energy Conference and Exhibition (ENERGYCON).

[3]  Demetrios G. Eliades,et al.  Placement of Synchronized Measurements for Power System Observability , 2009, IEEE Transactions on Power Delivery.

[4]  Ali Feliachi,et al.  Communication delays in wide area measurement systems , 2002, Proceedings of the Thirty-Fourth Southeastern Symposium on System Theory (Cat. No.02EX540).

[5]  Vahid Madani,et al.  Wide-Area Monitoring, Protection, and Control of Future Electric Power Networks , 2011, Proceedings of the IEEE.

[6]  A. G. Expósito,et al.  Power system state estimation : theory and implementation , 2004 .

[7]  Kun Zhu.  Data Quality in Wide-Area Monitoring and Control Systems , 2013 .

[8]  Tianshu Bi,et al.  Measurements get together , 2009, IEEE Power and Energy Magazine.

[9]  Lars Nordström,et al.  An Empirical Study of Synchrophasor Communication Delay in a Utility TCP/IP Network , 2013 .

[10]  Elias Kyriakides,et al.  The use of a PMU-based state estimator for tracking power system dynamics , 2014, 2014 IEEE PES General Meeting | Conference & Exposition.

[11]  Göran N Ericsson,et al.  Cyber Security and Power System Communication—Essential Parts of a Smart Grid Infrastructure , 2010, IEEE Transactions on Power Delivery.