Transient Response of Phasor Measurement Units

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


As has been mentioned before, phasor is a steady-state concept. In its classical interpretation it is a complex number representation of a pure sinusoidal waveform of single frequency although the frequency is not explicitly displayed in the phasor representation. In power systems, usually the implied frequency is the nominal frequency of the power system. However, it is well known that the power system is rarely operating precisely at the nominal system frequency. We have considered the effect of steady-state off-nominal frequency signals on the phasor measurement process in Chapter  3. It is also well-known that the power system voltages and currents have various harmonic, nonharmonic, and transient components. The harmonic and nonharmonic (steady-state) components are filtered to various degrees by appropriate analog or digital filters.

There are transient phenomena occurring on power systems due to a variety of causes which produce transient components in current and...


Power System Phasor Estimate Data Window Voltage Transformer Phasor Measurement Unit 
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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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