IEC/TR 61850-90-21 Ed. 1.0 en:2025

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Communication networks and systems for power utility automation - Part 90-21: Travelling Wave Fault Location

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Communication networks and systems for power utility automation - Part 90-21: Travelling Wave Fault Location

IEC TR 61850-90-21:2025, which is a Technical Report, aims to provide background information, use cases, data models and guidance on the application of such a technique.

This document will:

  • Describe the principles of fault location based on travelling waves aided by communications;
  • Specify use cases for this method under the following application scenarios:
    • a) Single-ended fault location,
    • b) Double-ended fault location through communications between two devices,
    • c) Double-ended fault location with communications to a master station,
    • d) Wide area fault location applications,
    • e) Pulse radar echo method,
    • f) Substation integration with other fault location and disturbance recording functions,
    • g) Testing and calibration;
  • Describe the information model for each use case;
  • Give guidance on scheme configuration.
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