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 NSF PEEC Workshop July 2014 JHC

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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.

NSF PEEC Workshop July 2014 JHC

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MATLAB PMU Simulator

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Main features:

Non-recursive DFT Off-nominal frequency operation Unbalanced input signals Symmetrical component estimation

P n

effects On-the-fly frequency changes

NSF PEEC Workshop July 2014 JHC

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Simulation Results: Single-Phase Computation

• Positive 1 Hz frequency step at 2 seconds • Single-phase performance after filtering

NSF PEEC Workshop July 2014 JHC

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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)

NSF PEEC Workshop July 2014 JHC

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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

NSF PEEC Workshop July 2014 JHC

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