|
MMXU class |
||||
|
Data object name |
Common data class |
Explanation |
T |
М/О/ c |
|
MinAPhs |
MV |
Minimum magnitude of current of the 3 phases. Min(la,lb,lc) |
|
0 |
|
MinPPVPhs |
MV |
Minimum magnitude of phase to phase voltage of the 3 phases. Min(PPVa, PPVb, PPVc) |
|
0 |
|
MinPhVPhs |
MV |
Minimum magnitude of phase to reference voltage of the 3 phases. MinfPhVa, PhVb, PhVc) |
|
0 |
|
MinWPhs |
MV |
Minimum magnitude of active power of the 3 phases. Min(Wa, Wb, Wc) |
|
0 |
|
MinVAPhs |
MV |
Minimum magnitude of apparent power of the 3 phases. Min(VAra, VArb, VArc) |
|
0 |
|
MinVArPhs |
MV |
Minimum magnitude of reactive power of the 3 phases. Min(VAra, VArb, VArc) |
|
0 |
|
MinPFPhs |
MV |
Minimum magnitude of power factor of the 3 phases. MinfPFa, PFb, PFc) |
|
о |
|
MinZPhs |
MV |
Minimum magnitude of impedance of the 3 phases. Min(Za, Zb, Zc) |
|
о |
|
Settings |
||||
|
CIcTotVA |
ENG |
Calculation method used for total apparent power (TotVA) |
|
о |
|
PFSign |
ENG |
Sign convention for VAr and power factor (PF) |
|
О |
5.10.13 LN: Sequence and imbalance Name: MSQI
For a description of this LN, see IEC 61850-5.
|
MSQI class |
||||
|
Data object name |
Common data class |
Explanation |
T |
М/О/ c |
|
LNName |
|
The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22. |
|
|
|
Data objects |
||||
|
Measured and metered values |
||||
|
SeqA |
SEQ |
Positive, negative and zero sequence current |
|
c |
|
SeqV |
SEQ |
Positive, negative and zero sequence voltage |
|
c |
|
DQOSeq |
SEQ |
DQO sequence |
|
0 |
|
ImbA |
WYE |
Imbalance current |
|
о |
|
ImbNgA |
MV |
Imbalance negative sequence current |
|
0 |
|
ImbNgV |
MV |
Imbalance negative sequence voltage |
|
0 |
|
ImbPPV |
DEL |
Imbalance phase-phase voltage |
|
о |
|
ImbV |
WYE |
Imbalance voltage |
|
О |
|
ImbZroA |
MV |
Imbalance zero sequence current |
|
о |
|
ImbZroV |
MV |
Imbalance zero sequence voltage |
|
О |
|
MaxImbA |
MV |
Maximum imbalance current |
|
О |
|
MaxImbPPV |
MV |
Maximum imbalance phase-phase voltage |
|
О |
|
MaxImbV |
MV |
Maximum imbalance voltage |
|
О |
Condition C: At least one of either data object shall be used.
5.10.14 LN: Metering statistics Name: MSTA
This LN is moved to Annex C because it includes the calculation methods MAX, MIN, AVG etc. and is therefore obsolete for this edition of the IEC 61850.
Logical nodes for protection functions LN Group: P
Modelling remarks
This subclause refers to modelling of protection and protection related logical nodes and shows the relation (see Table 7) between IEC 61850-5 and the logical node class definitions according to this standard.
If there are several stages to one function (i.e. for multi-zone relay), each stage shall be a separate instance of the LN. Examples are PDIS (n zones) or PTOV (2 stages).
Multiple instances shall be used if LNs of the same LN class are operating with different settings in parallel.
If different measuring principles such as phase or ground are required, each shall be represented by an instance of the same basic function. An example is PTOC (used for phase or ground in dedicated instances).
The logical nodes are defined in IEC 61850-5 from protection requirements (see Table 7), however, for modelling purposes, some logical nodes have been split (see Table 7).
Logical nodes from IEC 61850-5 are modelled using combinations of the LNs defined in this standard (see Table 6).
Other logical nodes have been added to model complex protection devices and schemes (see the following subclauses). As an example, line protection uses LN PSCH to combine the outputs from multiple protection LNs.
The protection functions provide (if applicable) the data object Str (Start) with direction information. In the case of a protection function which provides no direction information, the direction “unknown’’ shall be transmitted. The data object Str is summarised by LN PTRC.
If the fault direction is provided in Str (Start), the directional protection may be modelled without the directional element LN RDIR. If any of the settings provided by LN RDIR are needed, the LN RDIR shall be used.
The protection functions provide (if applicable) the data object Op (Operate) without direction information. The data object Op is conditioned by LN PTRC resulting in the data object Tr (Real Trip), that is between every protection LN and the circuit breaker node XCBR shall be a LN PTRC.
Table 7 - Relation between IEC 61850-5 and IEC 61850-7-4 (this standard) for protection LNs
|
Functionality |
IEEE C37.2 reference |
Defined in IEC 61850-5 |
Modelled in IEC 61850-7-4 |
Comments |
|
Distance |
21 |
PDIS |
PDIS PSCH |
Use one instance per zone. To build line protection schemes |
|
Directional power /reverse power |
32 |
PDPR |
PDOP or PDUP |
Directional over power Directional under power Reverse power modelled by PDOP plus directional mode “reverse’’ |
|
Undercurrent/underpower |
37 |
PUCP |
PTUC PDUP |
Undercurrent Underpower |
|
Loss of field/underexcitation |
40 |
PUEX |
PDUP PDIS |
Directional under power Underimpedance protection |
|
Functionality |
IEEEC37.2 reference |
Defined in IEC 61850-5 |
Modelled in IEC 61850-7-4 |
Comments |
|
Reverse phase or phase balance current |
46 |
PPBR |
PTOC |
Time overcurrent (PTOC) with three-phase information with sequence current as an input or even ratio of negative and positive sequence currents |
|
Phase sequence voltage |
47 |
PPBV |
PTOV |
Three-phase information and processing |
|
Rotor thermal overload |
49R |
PROL |
PTTR |
Thermal overload |
|
Stator thermal overload |
49S |
PSOL |
PTTR |
Thermal overload |
|
Power factor |
55 |
PPFR |
POPF PUPF |
Over power factor Under power factor |
|
DC-overvoltage |
59DC |
PDOV |
PTOV |
Both for DC and AC |
|
Voltage or current balance |
60 |
PVCB |
PTOV PTOC |
Overvoltage or overcurrent regarding the magnitude of the difference |
|
Rotor earth fault |
64R |
PREF |
PTOC PHIZ |
Time overcurrent |
|
Stator earth fault |
64S |
PSEF |
PTOC PHIZ |
Time overcurrent |
|
Interturn fault |
64W |
PITF |
PTOC |
Time overcurrent |
|
AC directional overcurrent |
67 |
PDOC |
PTOC |
Time overcurrent |
|
Directional earth fault |
67N |
PDEF |
PTOC |
Time overcurrent |
|
DC time overcurrent |
76 |
PDCO |
PTOC |
Time overcurrent for AC and DC |
|
Frequency |
81 |
PFRQ |
PTOF PTUF PFRC |
Over frequency Under frequency Rate of change of frequency |
|
Carrier or pilot wire protection |
85 |
RCPW |
PSCH |
PSCH is used for line protection schemes instead of RCPW |
|
Phase comparison |
87P |
PPDF |
PDIF |
|
|
Differential line |
87L |
PLDF |
PDIF |
|
|
Restricted earth fault |
87N |
PNDF |
PDIF |
|
|
Differential transformer |
87T |
PTDF |
PDIF PHAR |
Differential transformer Harmonic restraint |
|
Busbar |
87B |
PBDF |
PDIF or PDIR |
Busbar differential or fault direction comparison |
|
Motor differential |
87M |
PMDF |
PDIF |
|
|
Generator differential |
87G |
PGDF |
PDIF |
|
|
Motor startup |
49R, 66 48, 51LR |
PMSU |
PMRI PMSS |
Motor restart inhibition Motor starting time supervision |
|
Rotor protection |
64/59AC |
PROT |
PRTR |
Field short-circuit protection using the 6th harmonic (300 Hz). |
LN: Differential Name: PDIF
See IEC 61850-5 (LNs PLDF, PNDF, PTDF, PBDF, PMDF, and PPDF). This LN shall be used for all kinds of current differential protection. Proper current samples for the dedicated application shall be subscribed.
|
PDIF class |
||||
|
Data object name |
Common data class |
Explanation |
T |
MIDI c |
|
LNName |
|
The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22. |
|
|
|
Data objects |
||||
|
Status information |
||||
|
Str |
ACD |
Start |
|
0 |
|
Op |
ACT |
Operate |
T |
M |
|
TmASt |
CSD |
Active curve characteristic |
|
о |
|
Measured and metered values |
||||
|
DifACIc |
WYE |
Differential current |
|
0 |
|
RstA |
WYE |
Restraint current |
|
0 |
|
Controls |
||||
|
OpCntRs |
INC |
Resettable operation counter |
|
0 |
|
Settings |
||||
|
LinCapac |
ASG |
Line capacitance (for load currents) |
|
0 |
|
LoSet |
ASG |
Low operate value, percentage of the nominal current |
|
c |
|
HiSet |
ASG |
High operate value, percentage of the nominal current |
|
c |
|
MinOpTmms |
ING |
Minimum operate time |
|
0 |
|
MaxOpTmms |
ING |
Maximum operate time |
|
0 |
|
RstMod |
ENG |
Restraint mode |
|
0 |
|
RsDITmms |
ING |
Reset delay time |
|
0 |
|
TmACrv |
CURVE |
Operating curve type |
|
о |
|
TmAChr33 |
CSG |
Multiline curve characteristic definition |
|
о |
|
Condition C: These data objects are conditional, and if used only one data object should be applied. |
||||
|
NOTE TmAChr33 refers to the attribute TmACrv.setCharact = 33 etc. |
||||
LN: Direction comparison Name: PDIR
For a description of this LN, see IEC 61850-5. The operate decision is based on an agreement of the fault direction signals from all directional fault sensors (for example directional relays) surrounding the fault. The directional comparison for lines is made with PSCH.
|
PDIR Class |
||||
|
Data object name |
Common data class |
Explanation |
T |
М/О/ C |
|
LNName |
|
The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22. |
|
|
|
Data objects |
||||
|
Status information |
||||
|
Str |
ACD |
Start (appearance of the first related fault direction) |
|
M |
|
Op |
ACT |
Operate (decision from all sensors that the surrounded object is faulted) |
T |
M |
|
Controls |
||||
|
OpCntRs |
INC |
Resettable operation counter |
|
о |
|
Settings |
||||
|
RsDITmms |
ING |
Reset delay time |
|
0 |
LN: Distance Name: PDIS
For a description of this LN, see IEC 61850-5. The phase start value and ground start value are minimum thresholds to release the impedance measurements depending on the distance function characteristic given by the algorithm and defined by the settings. The settings replace the data object curve as used for the characteristic on some other protection LNs. One instance of PDIS per zone shall be used.
|
PDIS class |
||||
|
Data object name |
Common data class |
Explanation |
T |
М/О/ c |
|
LNName |
|
The name shall be composed of the class name, the LN-Prefix and LN- !nstance-ID according to IEC 61850-7-2, Clause 22. |
|
|
|
Data objects |
||||
|
Status information |
||||
|
Str |
ACD |
Start |
|
M |
|
Op |
ACT |
Operate |
T |
M |
|
Controls |
||||
|
OpCntRs |
INC |
Resettable operation counter |
|
о |
|
Settings |
||||
|
PoRch |
ASG |
Polar reach is the diameter of the Mho diagram |
|
о |
|
PhStr |
ASG |
Phase start value |
|
о |
|
GndStr |
ASG |
Ground start value |
|
О |
|
DirMod |
ENG |
Directional mode |
|
О |
|
PctRch |
ASG |
Percent reach |
|
О |
|
Ofs |
ASG |
Offset |
|
О |
|
PctOfs |
ASG |
Percent offset |
|
О |
|
RisLod |
ASG |
Resistive reach for load area |
|
О |
|
AngLod |
ASG |
Angle for load area |
|
О |
|
TmDIMod |
SPG |
Operate time delay mode |
|
О |
|
OpDITmms |
ING |
Operate time delay |
|
О |
|
PhDIMod |
SPG |
Operate time delay multiphase mode |
|
О |
|
PhDITmms |
ING |
Operate time delay for multiphase faults |
|
о |
|
GndDIMod |
SPG |
Operate time delay for single phase ground mode |
|
о |
|
GndDITmms |
ING |
Operate time delay for single phase ground faults |
|
о |
|
X1 |
ASG |
Positive sequence line (reach) reactance |
|
о |
|
LinAng |
ASG |
Line angle |
|
О |
|
RisGndRch |
ASG |
Resistive ground reach |
|
о |
|
RisPhRch |
ASG |
Resistive phase reach |
|
О |
|
KOFact |
ASG |
Residual compensation factor Ko |
|
О |
|
KOFactAng |
ASG |
Residual compensation factor angle |
|
о |
|
RsDITmms |
ING |
Reset time delay |
|
о |
