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Laboratory Calibration of Energy Measurement Systems (EMS) under AC Distorted Waveforms.

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Summary
This summary is machine-generated.

New calibration systems now enable testing of railway energy measurement devices according to EN 50463-2. These systems generate distorted voltages and currents with harmonics, ensuring accurate power measurements for traction units.

Keywords:
calibration procedurecalibration setupdistorted regimeenergy measurementenergy measuring systemfictive power sourceharmonic waveformrailway system

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Area of Science:

  • Electrical Engineering
  • Metrology
  • Railway Technology

Background:

  • Current standard EN 50463-2 specifies tests for railway traction unit energy measurement systems.
  • These tests require superposed harmonics on voltage and current, but suitable calibration systems were previously unavailable.

Purpose of the Study:

  • To develop and present fictive power sources and reference measurement systems for calibrating railway energy measurement systems under harmonic conditions.
  • To address the lack of available calibration systems meeting EN 50463-2 requirements.

Main Methods:

  • Development of specialized fictive power sources capable of generating distorted 25 kV-50 Hz voltages with harmonics up to 5 kHz.
  • Creation of reference measurement systems for accurate power measurement under these conditions.
  • Generation of 90° phase-fired currents up to 500 A with harmonics up to 5 kHz.

Main Results:

  • Successfully developed and demonstrated fictive power sources and reference measurement systems.
  • Achieved generation of distorted voltages and currents with specified harmonic content.
  • Demonstrated traceable power measurement with accuracy better than 0.5%.

Conclusions:

  • The developed systems enable compliance with EN 50463-2 for railway energy measurement calibration.
  • This advancement facilitates accurate power measurement in railway applications with non-sinusoidal conditions.
  • The project successfully bridged a critical gap in metrological capabilities for the railway sector.