IEC TC 57 Just Published the IEC 61850-90-11 on Logics

IEC TC 57 Just Published the 90 pages of the Draft Technical Report IEC 61850-90-11 (57/2129/DTR)

Communication networks and systems for power utility automation –
Part 90-11: Methodologies for modelling of logics for IEC 61850 based applications

Voting closes 2019-10-04

"This Technical Report of IEC 61850 describes the methodologies for the modelling of logics for IEC 61850 based applications. ... the technical report

• Defines different application uses cases where all aspects to be considered are clearly identified.
• Describes the functional requirements and the intended engineering process
• Proposes a suitable solution in the context of IEC 61850 based on an investigation of the different possibilities to model the logic.
• Describes the impact on various parts of IEC 61850"

If, when and how this Technical Report will impact implementations of tools and IEDs is quite open. I remember that we had heated debates on the question how to deal with (internal) logics already some 10 years ago.

If you are planning to apply IEC 61850 - please DO NOT wait until this part 90-11 offers stable definitions ... IEC 61850 (as it is defined today) has enough to get started! ;-)

IEC 61850-90-11 - Modelling of Logics for IEC 61850 Based Applications

IEC TC 57 just published a 50+ page proposal for a very interesting topic:

57/2001/DC

Proposed IEC TR 61850-90-11, Communication networks and systems for power utility automation – Part 90-11: Methodologies for modelling of logics for IEC 61850 based applications

Comments to this draft are expected by 2018-07-27 at the latest.

This is likely the first time where application modelling (using a single configuration language!) integrates basic logic functions like AND, OR, Timer, ... including a Mapping of IEC 61850 data types and IEC 61131-3 / PLC Open XML data types.

The document introduces a couple of use cases describing mainly the control and monitoring of switchgears and electrical measurements.

Use case 1 – Busbar disconnector coupled in a double busbar arrangement
Use case 2 – Delayed breaker trip and blocking after 1st low gas pressure alarm
Use case 3 – Bay connected to busbar A
Use case 4 – Definite trip
Use case 5 – "Direct transfer open operation"
Use case 6 – Line outage detection in a breaker and a half scheme
Use case 7 – Unit trip logic
Use case 8 – Data quality management
Use case 9 – Switchgear control on the example of a busbar change-over

The modelling of logics could be of interest for many other applications.