1.1 Scope of work

This part of IEC 61850, 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

1. describe the principles of fault location based on travelling waves aided by communications;

2. specify use cases for this method under the following application scenarios:

   1. Single-ended fault location,

   2. Double-ended fault location through communications between two devices,

   3. Double-ended fault location with communications to a master station,

   4. Wide area fault location applications,

   5. Pulse radar echo method,

   6. Substation integration with other fault location and disturbance recording functions,

   7. Testing and calibration;

3. describe the information model for each use case;

4. give guidance on scheme configuration.

1.2 Published versions of the standard and related namespace names

The table below provides a reference between all published editions, amendments or corrigenda of this document and the full name of the namespace.

1.3 Namespace name and version

The parameters which identify this new release of this namespace are as follows:

1.4 Published versions of the standard and related namespace names

shows all attributes of (Tr)IEC 61850‑90‑21:2022A namespace.

1.5 Code Component distribution

Each Code Component is a ZIP package containing the electronic representation of the Code Component itself, with a file describing the content of the package (IECManifest.xml).

The life cycle of a code component is not restricted to the life cycle of the related publication. The publication life cycle goes through two stages, Version (corresponding to an edition) and Revision (corresponding to an amendment). A third publication stage (Release) allows publication of Code Component in case of urgent fixes of InterOp Tissues, thus without need to publish an amendment.

Consequently new release(s) of the Code Component may be released, which supersede(s) the previous release, and will be distributed through the IEC TC57 web site at: http://www.iec.ch/tc57/supportdocuments.

The code component associated to this TR is an nsd file. It is available as a full version and a light version. The light version is freely accessible on the IEC website for download at: http://www.iec.ch/tc57/supportdocuments, but the usage remains under the licensing conditions.

The latest version/release of the document will be found by selecting the file for the code component with the highest value for VersionStateInfo e.g. IEC_TR_61850‑9021.NSD.{VersionStateInfo}.Light

In case of any differences between the downloadable code component and the IEC pdf published content, the downloadable code component is the valid one; it may be subject to updates. See included history files.