Table 2 Interpretation of detailed quality for sampled values subscribed by protection functions
From: Towards a standardisation for digital inputs and outputs of protection functions in IEC 60255 series
[IEC 61850-7-2:2010 + AMD1 | IEC 61869-9:2016 [applicable to SV published by MU] | Application for Protection Functions | |||
|---|---|---|---|---|---|
Detail Qual | Definition | Invalid | Question-able | Meaning of DetailQual for received data | |
Overflow | Value beyond the capability of being represented properly | Not Used. Always set to FALSE | X | Prohibited by IEC 61850-7-2: 2010 + AMD1 (Annex D) | Not used in IEC 61869-9:2016 May be applicable to other analog information, e.g. phasors (PhV, A) The protection shall process the input as invalid |
Out of range | Value beyond a predefined range of values | True in case of Clipping Publication with validity attribute "Questionable" | X | Publication with validity attribute as "Questionable" preferred The relevant functional standard shall specify how to process the input Applicable to SV and other analog information, eg. phasors (PhV, A) | |
Inaccurate | The value does not meet the stated accuracy of the source | True if signal does not respect the specified accuracy | Prohibited IEC 61850-7-2: 2010 + AMD1 (Annex D) | X | Applicable to any type of received input data The relevant functional standard shall specify how to process the input Applicable to SV and other analog information, e.g. phasors (PhV, A) |
Badreference | Value may not be a correct value due to a reference being out of calibration | Not Used. Always set to FALSE | X | Publication with as "Questionable" preferred. The relevant functional standard shall specify how to process the input. Not used in IEC 61869-9:2016 May be applicable to other analog information, e.g. phasors (PhV, A) | |
Oscillatory | Signal changes in a defined time twice in the same direction | Not Used. Always set to FALSE | X | Not Applicable to analog input data (SV, phasors, etc..), only to binary input data The protection shall process the input as invalid | |
Failure | Indicates that a supervision function has detected an internal or external failure | Used for detected errors | X | Prohibited by IEC 61850-7-2: 2010 + AMD1 (Annex D | Applicable to any type of received input data The protection shall process the input as invalid |
Olddata | If an update is not made during a specific time interval | Not Used. Always set to FALSE | Prohibited by IEC 61850-7-2: 2010 + AMD1 (Annex D | X | Not used in IEC 61869-9:2016 May be applicable to information, e.g. phasors (PhV, A) The relevant functional standard shall specify how to process the input |
Inconsistent | Indicates that an evaluation function has detected an inconsistency | Not Used. Always set to FALSE | Prohibited by IEC 61850-7-2: 2010 + AMD1 (Annex D | X | Not used in IEC 61869-9:2016 May be applicable to other information, e.g. phasors (PhV, A) The relevant functional standard shall specify how to process the input |