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Feature #5374

Creation of a new LN for protection function

Added by Christophe Ghafari 2 months ago. Updated 27 days ago.

Status:
Triage
Priority:
Normal
Assignee:
-
Category:
Standard extension required
Start date:
06/02/2022
Due date:
08/14/2022 (1 day late)
% Done:

0%

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

IEC 61850-7-4


Description

To detect faults occurring between the busbar and the HV side of a transformer/autotransformer, a specific function based on impedance measurement is installed of the LV side of the transformer/autotransformer. This function shares similarities with the distance protection (PDIS) : it computes the 6 impedance loops based on voltage and current measurements to detect if a fault has occurred. However, to detect phase-to-ground faults, the traditional approach of using the k0 factor to compute the phase-to-ground impedance loops cannot be used as it is the case for distance protection, especially if the transformer coupling is delta-delta (residual current cannot flow). The phase-to-ground impedance loops are thus computed by simply dividing the voltage by the current without taking into consideration neither the k0 factor nor the residual current.

Proposal : a new LN (PIMP = Impedance protection ?), with associated DO and DA should be created to deal with this use case.


Proposal descriptions

RTE to provide list of DO/DA for PDIS along with use-case/description.
Also, it would be good to have justification why is needed to create new LN and not only to extend PDIS.

#1

Updated by Vladan Cvejic 2 months ago

  • Status changed from New to Triage
#2

Updated by Vladan Cvejic 2 months ago

  • Due date set to 08/14/2022
  • Category set to Standard extension required
  • Proposal descriptions updated (diff)
  • Standard(s) set to IEC 61850-7-4
#3

Updated by Carlos Rodriguez del Castillo 27 days ago

  • Discuss in Upcoming Meeting changed from No to Yes

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