State Estimation

  • A.G. Phadke
  • J.S. Thorp
Part of the Power Electronics and Power Systems book series (PEPS)

History — Operator’s load flow

Before the advent of state estimation the power system operator had responsibility for many real-time control center functions, including scheduling generation and interchange, monitoring outages and scheduling alternatives, supervising scheduled outages, scheduling frequency and time corrections, coordinating bias settings, and emergency restoration of the system. All of this was done with operating guides produced by the planning department after running a large number of load flows. As is always the case, the actual events faced by the operator were occasionally unexpected and had not been included in the planning cases. The solution was to supply the operator with a load flow program installed in the control center. The operator could manually enter data describing the current situation and get a load flow corresponding to the real world. Unexpectedly, the operator’s load flow did not work well. The problems were caused by insufficient data,...


Phasor Measurement Incidence Matrix Line Current Load Flow Voltage Magnitude 
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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • A.G. Phadke
    • 1
  • J.S. Thorp
    • 1
  1. 1.Virginia Polytechnic Institute and State UniversityBlacksburgUSA

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