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A PMU Simulator for Power System Education Use

A PMU Simulator for Power System Education Use. NSF PEEC Workship July 19, 2014 Daniel Dotta Instituto Federal de Santa Catarina Joe Chow Rensselaer Polytechnic Institute. Phasor Processing for Uniform Sampling. Phasor Calculation – Off-nominal Frequency.

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A PMU Simulator for Power System Education Use

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  1. A PMU Simulator for Power System Education Use NSF PEEC Workship July 19, 2014 Daniel Dotta Instituto Federal de Santa Catarina Joe Chow Rensselaer Polytechnic Institute

  2. Phasor Processing for Uniform Sampling

  3. Phasor Calculation – Off-nominal Frequency • DFS of the fundamental 60 Hz component is exact when the nominal frequency is at 60 Hz: constant magnitude and phase increasing linearly with time • At off-nominal frequency, the frequency perturbation results the phasor rotating on an ellipse. The magnitude will have a second harmonic (120 Hz) component super-imposed on a constant magnitude, and the phase will also has a second harmonic component on the linear phase component.

  4. MATLAB PMU Simulator • Main features: • Non-recursive DFT • Off-nominal frequency operation • Unbalanced input signals • Symmetrical component estimation • and complex gain effects • On-the-fly frequency changes

  5. Simulation Results: Single-Phase Computation • Positive 1 Hz frequency step at 2 seconds • Single-phase performance after filtering

  6. Real Measurement Results from Load Rejection Test Load rejection test during generator testing with breaker not opening properly – sampling at 2.88 kHz (48 points per cycle)

  7. Classroom Adoption • Courses on power system dynamics and measurements • Frequency calculation • Three-phase systems • Symmetric components – positive, negative, and zero sequence computation • Processing of real three-phase point-on-wave measurements

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