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Improvement #5323

Schedules - allow updates to single values while schedules are running

Added by Tom Berry about 2 years ago. Updated 11 months ago.

Status:
Resolved
Priority:
Normal
Category:
Standard clarification required
Start date:
03/02/2022
Due date:
09/02/2022 (about 20 months late)
% Done:

0%

Estimated time:
ID:
3
Source:
WG17
TF Unique ID:
3 # WG17
WG10 Proposal:
Estimated Completion:
Discuss in Upcoming Meeting:
No
To discuss in WG10:
No
Short Proposal:
Standard(s):

IEC 61850-7-4,7-5

Needs More Information:
No
Assigned TF:

Description

Context: how to use IEC 61850 for DER and microgrids (IEC 61850-90-23 CD1).

IEC 61850-7-4 prescribes that schedules may only be updated whilst they are offline. This is a conservative approach that allows for validation of all the settings to ensure consistency before re-starting i.e. evaluating the schedule output.
There are two approaches:
1. Stop the running schedule; change it, restart
2. Write to another schedule with a higher priority and start that; stop the original schedule; change it, restart it; stop the second schedule.

This approach is unnecessarily complex for some cases. A common use case is to update a schedule for one or more periods in the future. In these cases, updating individual schedule values will not affect the current schedule output, so there is no need to require the schedule to be deactivated and reactivated.

See also #3098


Proposal descriptions

We recommend people from WG17 to explain the specific requirements to WG10 7-5 Task Force.


Related issues

Copied to IEC TC57 WG10 Future Work - WG10 Future Work #5965: Schedules - allow updates to single values while schedules are runningNew03/02/202209/02/2022

Actions
Copied to 61850-7-5 and 61850-7-500 - IEC61850-7-5 #6405: Schedules - allow updates to single values while schedules are runningNew03/02/202209/02/2022

Actions

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