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Support #548

The start-up behaviour of Boundary Clocks

Added by Herbert Falk almost 2 years ago. Updated 5 months ago.

Status:
Resolved
Priority:
Normal
Category:
Standard clarification required
Start date:
Due date:
% Done:

0%

Estimated time:
ID:
29
Source:
IOP_2017/50
TF Unique ID:
29 # IOP_2017/50
WG10 Proposal:
Estimated Completion:
Discuss in Upcoming Meeting:
No
To discuss in WG10:
Short Proposal:

To send to Hubert for next 9-3 revision

Standard(s):

IEC 61850-9-3

Needs More Information:

Description

The start-up behaviour of BCs is unsatisfactory.
A BC in holdover (i.e. grandmaster with no time reference), should not return to BC mode when the time reference is restored before its clock oscillator stabilizes to the new grandmaster. The tested BC when connected to the time reference (GPS) immediately forward the GrandMaster time advertising the accuracy of the grandmaster.
Otherwise, all slave clocks below the BC will be subject to the additional jitter of the BC’s clock resynchronizing to the GM.
This can be tested by disconnecting the BC for some minutes and then reconnect it to the grandmaster.


Proposal descriptions

Assigned to IEC 61850-9-3

#1

Updated by Vladan Cvejic almost 2 years ago

  • Subject changed from The start-up behaviour of BCs is unsatisfactory. A BC in holdover (i.e. grandmaster with no time reference), should not return t to The start-up behaviour of Boundary Clocks
  • Category set to Standard clarification required
  • Status changed from New to In Progress
  • Standard(s) changed from 3-Sep to IEC 61850-9-3
  • Discuss in Upcoming Meeting set to No

Checking done.

#2

Updated by Carlos Rodriguez del Castillo 5 months ago

  • Status changed from In Progress to Resolved
  • Assignee set to Fred Steinhauser
  • Proposal descriptions updated (diff)

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