Draft61850-7-4©1EC:2002 -21- 57WG10-12(61850-7-4)R3.0/FD1S 5.4 Logical Nodes for protection functions LN Group:P 5.4.1 Modelling Remarks This section refers to modelling of protection and protection related Logical Nodes and shows the relation (see Table 3)between IEC 61850-5 and the Logical Node class definitions according this document. If there are several stages of 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 setting groups 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.Examples are PTOC (used for phase or ground in dedicated instances). The logical nodes are defined in part IEC 61850-5 from protection requirements,however for modelling purposes some logical nodes have been split(see table below). Logical Nodes from IEC 61850-5 are modelled using combinations of the LNs defined in this part (see table below). Other logical nodes have been added to model complex protection devices and schemes (see following chapters).As an example,Line protection uses LN PSCH to combine the outputs from multiple protection LNs. The protection functions provide (if applicable)the data Str (Start)with direction information.In case of a protection function which provides no direction information the direction"unknown"shall be transmitted.The data Str is summarised by LN PTRC. The protection functions provide (if applicable)the data Op (Operate)without direction information.The data Op is conditioned by LN PTRC resulting in the data Tr(Real Trip), i.e.between every protection LN and the circuit breaker node XCBR shall be a LN PTRC. Table 3-Relation IEC 61850-5 and IEC 61850-7-4 for protection LNs Modelled in Functionality IEEE- Defined in 1EC61850-7-4 Comments Reference 1EC61850-5 Transient earthfault PTEF PTEF Use shown in the Annex Zero speed and underspeed 14 PZSU PZSU PDIS Distance 21 PDIS Use one instance per zone PSCH To build line prot.schemes Volt per Hz 24 PVPH PVPH (Time)Undervoltage 27 PTUV PTUV Directional over power PDOP Directional under power Directional power /reverse 32 PDPR or power Reverse power modelled PDUP by PDOP plus directional mode“reverse" PTUC Undercurrent/underpower 37 PUCP Undercurrent PDUP Underpower Loss of field/Underexcitation 40 PUEX PDUP Directional under power Time overcurrent (PTOC) with three-phase Reverse phase or phase 46 PPBR PTOC information with sequence balance current current as an input or even ratio of negative and positive sequence currents Version 3.0:22.August 2002
Draft 61850-7-4 IEC: 2002 – 21 – 57/WG10-12(61850-7-4)R3.0/FDIS Version 3.0: 22. August 2002 5.4 Logical Nodes for protection functions LN Group: P 5.4.1 Modelling Remarks This section refers to modelling of protection and protection related Logical Nodes and shows the relation (see Table 3) between IEC 61850-5 and the Logical Node class definitions according this document. • If there are several stages of 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 setting groups 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. Examples are PTOC (used for phase or ground in dedicated instances). • The logical nodes are defined in part IEC 61850-5 from protection requirements, however for modelling purposes some logical nodes have been split (see table below). • Logical Nodes from IEC 61850-5 are modelled using combinations of the LNs defined in this part (see table below). • Other logical nodes have been added to model complex protection devices and schemes (see following chapters). As an example, Line protection uses LN PSCH to combine the outputs from multiple protection LNs. • The protection functions provide (if applicable) the data Str (Start) with direction information. In case of a protection function which provides no direction information the direction “unknown” shall be transmitted. The data Str is summarised by LN PTRC. • The protection functions provide (if applicable) the data Op (Operate) without direction information. The data Op is conditioned by LN PTRC resulting in the data Tr (Real Trip), i.e. between every protection LN and the circuit breaker node XCBR shall be a LN PTRC. Table 3 – Relation IEC 61850-5 and IEC 61850-7-4 for protection LNs Functionality IEEEReference Defined in IEC61850-5 Modelled in IEC61850-7-4 Comments Transient earthfault PTEF PTEF Use shown in the Annex Zero speed and underspeed 14 PZSU PZSU Distance 21 PDIS PDIS PSCH Use one instance per zone. To build line prot. schemes Volt per Hz 24 PVPH PVPH (Time) Undervoltage 27 PTUV PTUV 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 Directional under power 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
Draft61850-7-4©IEC:2002 -22- 57WG10-12(61850-7-4)R3.0/FD1S IEEE- Defined in Modelled in Functionality Comments Reference 1EC61850-5 1EC61850-7-4 Phase sequence voltage 47 PPBV PTOV Three-phase information and processing Thermal overload 49 PTTR PTTR Rotor thermal overload 49R PROL PTTR Thermal overload Stator thermal overload 49S PSOL PTTR Thermal overload Instantaneous overcurrent or 50 PIOC PIOC rate of rise AC time overcurrent 51 PTOC PTOC Voltage controlled/dependent 51V PVOC PVOC time overcurrent Power factor 55 PPFR POPF Over power factor PUPF Under power factor (Time)Overvoltage 59 PTOV PTOV DC-overvoltage 59DC PDOV PTOV Both for DC and AC Voltage or current balance 60 PVCB PTOV Over voltage or Under PTUV voltage Earth fault Ground detection 64 PHIZ PHIZ Rotor earth fault 64R PREF PTOC Time overcurrent Stator earth fault 64S PSEF PTOC 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 Phase angle or out-of-step 78 PPAM PPAM PTOF Over frequency Frequency 81 PFRQ PTUF Under frequency PFRC Rate of change of frequency Differential 87 PDIF PDIF Phase comparison 87P PPDF PDIF Differential line 87L PLDF PDIF Restricted earth fault 87N PNDF PDIF Differential transformer 87T PTDF PDIF Differential transformer PHAR Harmonic restraint 87B PBDF PDIF or Busbar differential or Busbar PDIR Fault direction comparison Motor differential 87M PMDF PDIF Generator differential 87G PGDF PDIF 49R,66 PMRI Motor Restart Inhibition Motor Startup 48,51LR PMSU Motor Starting Time PMSS Supervision 5.4.2 LN:Differential Name:PDIF See 61850-5(LNs PLDF,PNDF,PTDF,PBDF,PMDF,and PPDF).-This LN shall be used for all kind of current differential protection.Proper current samples for the dedicated application shall be subscribed. Version 3.0:22.August 2002
Draft 61850-7-4 IEC: 2002 – 22 – 57/WG10-12(61850-7-4)R3.0/FDIS Version 3.0: 22. August 2002 Functionality IEEEReference Defined in IEC61850-5 Modelled in IEC61850-7-4 Comments Phase sequence voltage 47 PPBV PTOV Three-phase information and processing Thermal overload 49 PTTR PTTR Rotor thermal overload 49R PROL PTTR Thermal overload Stator thermal overload 49S PSOL PTTR Thermal overload Instantaneous overcurrent or rate of rise 50 PIOC PIOC AC time overcurrent 51 PTOC PTOC Voltage controlled/dependent time overcurrent 51V PVOC PVOC Power factor 55 PPFR POPF PUPF Over power factor Under power factor (Time) Overvoltage 59 PTOV PTOV DC-overvoltage 59DC PDOV PTOV Both for DC and AC Voltage or current balance 60 PVCB PTOV PTUV Over voltage or Under voltage Earth fault / Ground detection 64 PHIZ PHIZ Rotor earth fault 64R PREF PTOC Time overcurrent Stator earth fault 64S PSEF PTOC 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 Phase angle or out-of-step 78 PPAM PPAM Frequency 81 PFRQ PTOF PTUF PFRC Over frequency Under frequency Rate of change of frequency Differential 87 PDIF PDIF 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 5.4.2 LN: Differential Name: PDIF See 61850-5 (LNs PLDF, PNDF, PTDF, PBDF, PMDF, and PPDF). – This LN shall be used for all kind of current differential protection. Proper current samples for the dedicated application shall be subscribed
Draft61850-7-4©lEC:2002 -23- 57WG10-12(61850-7-4)R3.0/FD1S PDIF class Attribute Name Attr.Type Explanation M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data Common Logical Node Information LN shall inherit all Mandatory Data from Common Logical Node Class. M OpCntRs INC Resetable operation counter 0 Status Information Str ACD Start 0 Op ACT Operate M TmASt CSD Active curve characteristic 0 Measured Values DifACIc WYE Differential Current 0 RstA WYE Restraint Current 0 Settings LoSet ING Low operate value,percentage of the nominal current M HiSet ING High operate value,percentage of the nominal current 0 MinOpTmms ING Minimum Operate Time 0 MaxOpTmms ING Maximum Operate Time 0 RstMod ING Restraint Mode 0 RsDITmms ING Reset Delay Time 0 TmACrv CURVE Operating Curve Type 0 5.4.3 LN:Direction comparison Name:PDIR Description of this LN see IEC 61850-5.For the trip decision based on an agreement on the fault direction signals from all directional fault sensors (e.g.directional relays)surrounding the fault.The directional comparison for lines is made with PSCH. PDIR class Attribute Name Attr.Type Explanation M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data Common Logical Node Information LN shall inherit all Mandatory Data from Common Logical Node Class. M OpCntRs INC Resetable operation counter 0 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) M Settings RsDITmms ING Reset Delay Time 0 5.4.4 LN:Distance Name:PDIS 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 CURVE as used for the characteristic on some other protection LNs. PDIS class Attribute Name Attr.Type Explanation M/O Version 3.0:22.August 2002
Draft 61850-7-4 IEC: 2002 – 23 – 57/WG10-12(61850-7-4)R3.0/FDIS Version 3.0: 22. August 2002 PDIF class Attribute Name Attr. Type Explanation T M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data Common Logical Node Information LN shall inherit all Mandatory Data from Common Logical Node Class. M OpCntRs INC Resetable operation counter O Status Information Str ACD Start O Op ACT Operate T M TmASt CSD Active curve characteristic O Measured Values DifAClc WYE Differential Current O RstA WYE Restraint Current O Settings LoSet ING Low operate value, percentage of the nominal current M HiSet ING High operate value, percentage of the nominal current O MinOpTmms ING Minimum Operate Time O MaxOpTmms ING Maximum Operate Time O RstMod ING Restraint Mode O RsDlTmms ING Reset Delay Time O TmACrv CURVE Operating Curve Type O 5.4.3 LN: Direction comparison Name: PDIR Description of this LN see IEC 61850-5. For the trip decision based on an agreement on the fault direction signals from all directional fault sensors (e.g. directional relays) surrounding the fault. The directional comparison for lines is made with PSCH. PDIR class Attribute Name Attr. Type Explanation T M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data Common Logical Node Information LN shall inherit all Mandatory Data from Common Logical Node Class. M OpCntRs INC Resetable operation counter O 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 Settings RsDlTmms ING Reset Delay Time O 5.4.4 LN: Distance Name: PDIS 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 CURVE as used for the characteristic on some other protection LNs. PDIS class Attribute Name Attr. Type Explanation T M/O
Draft61850-7-4©IEC:2002 -24- 57WG10-12(61850-7-4)R3.0/FD1S PDIS class Attribute Name Attr.Type Explanation M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data Common Logical Node Information LN shall inherit all Mandatory Data from Common Logical Node Class. M OpCntRs INC Resetable operation counter 0 Status Information Str ACD Start M Op ACT Operate M 2 Settings PoRch ASG Polar Reach is the diameter of the Mho diagram 0 PhStr ASG Phase Start Value 0 GndStr ASG Ground Start Value 0 DirMod ING Directional Mode 0 PctRch ASG Percent Reach 0 Ofs ASG Offset PctOfs ASG Percent Offset 0 RisLod ASG Resistive reach for load area 0 AngLod ASG Angle for load area 0 TmDIMod SPG Operate Time Delay Mode OpDITmms ING Operate Time Delay PhDIMod SPG Operate Time Delay Multiphase Mode 0 PhDITmms ING Operate Time Delay for Multiphase Faults 0 GndDIMod SPG Operate Time Delay for Single Phase Ground Mode 0 GndDITmms ING Operate Time Delay for single phase ground faults 0 X1 ASG Positive sequence line (reach)reactance LinAng ASG Line Angle RisGndRch ASG Resistive Ground Reach 0 RisPhRch ASG Resistive Phase Reach 0 KOFact ASG Residual Compensation Factor Ko 0 KOFactAng ASG Residual Compensation Factor Angle 0 RsDITmms ING Reset Time Delay 0 Version 3.0:22.August 2002
Draft 61850-7-4 IEC: 2002 – 24 – 57/WG10-12(61850-7-4)R3.0/FDIS Version 3.0: 22. August 2002 PDIS class Attribute Name Attr. Type Explanation T M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data Common Logical Node Information LN shall inherit all Mandatory Data from Common Logical Node Class. M OpCntRs INC Resetable operation counter O Status Information Str ACD Start M Op ACT Operate T M Settings PoRch ASG Polar Reach is the diameter of the Mho diagram O PhStr ASG Phase Start Value O GndStr ASG Ground Start Value O DirMod ING Directional Mode O PctRch ASG Percent Reach O Ofs ASG Offset O PctOfs ASG Percent Offset O RisLod ASG Resistive reach for load area O AngLod ASG Angle for load area O TmDlMod SPG Operate Time Delay Mode O OpDlTmms ING Operate Time Delay O PhDlMod SPG Operate Time Delay Multiphase Mode O PhDlTmms ING Operate Time Delay for Multiphase Faults O GndDlMod SPG Operate Time Delay for Single Phase Ground Mode O GndDlTmms ING Operate Time Delay for single phase ground faults O X1 ASG Positive sequence line (reach) reactance O LinAng ASG Line Angle O RisGndRch ASG Resistive Ground Reach O RisPhRch ASG Resistive Phase Reach O K0Fact ASG Residual Compensation Factor K0 O K0FactAng ASG Residual Compensation Factor Angle O RsDlTmms ING Reset Time Delay O
Draft61850-7-4©lEC:2002 -25- 57WG10-12(61850-7-4)R3.0/FD1S 5.4.5 LN:Directional overpower Name:PDOP Description of this LN see IEC 61850-5(LN PDPR).This LN shall be used for the overpower part of PDPR.Additionally,PDOP is used to model a reverse over power function(IEEE 32R) when the DirMod is set to reverse. PDOP class Attribute Name Attr.Type Explanation M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data Common Logical Node Information LN shall inherit all Mandatory Data from Common Logical Node Class. M OpCntRs INC Resetable operation counter 0 Status Information Str ACD Start M Op ACT Operate M T Settings DirMod ING Directional Mode M StrVal ASG Start Value M OpDITmms ING Operate Delay Time 0 RsDITmms ING Reset Delay Time 0 5.4.6 LN:Directional underpower Name:PDUP Description of this LN see IEC 61850-5(LN PDPR).This LN shall be used for the underpower part of PDPR. PDUP class Attribute Name Attr.Type Explanation M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2) Data Common Logical Node Information LN shall inherit all Mandatory Data from Common Logical Node Class. M OpCntRs INC Resetable operation counter 0 Status Information Str ACD Start M Op ACT Operate M Settings StrVal ASG Start Value M OpDITmms ING Operate Delay Time 0 RsDITmms ING Reset Delay Time 0 DirMod ING Directional Mode 0 5.4.7 LN:Rate of change of frequency Name:PFRC Description of this LN see IEC 61850-5(LN PFRQ).This LN shall be used to model the rate of frequency change of PFRQ.One instance shall be used per stage. PFRC class Attribute Name Attr.Type Explanation M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Version 3.0:22.August 2002
Draft 61850-7-4 IEC: 2002 – 25 – 57/WG10-12(61850-7-4)R3.0/FDIS Version 3.0: 22. August 2002 5.4.5 LN: Directional overpower Name: PDOP Description of this LN see IEC 61850-5 (LN PDPR). This LN shall be used for the overpower part of PDPR. Additionally, PDOP is used to model a reverse over power function (IEEE 32R) when the DirMod is set to reverse. PDOP class Attribute Name Attr. Type Explanation T M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data Common Logical Node Information LN shall inherit all Mandatory Data from Common Logical Node Class. M OpCntRs INC Resetable operation counter O Status Information Str ACD Start M Op ACT Operate T M Settings DirMod ING Directional Mode M StrVal ASG Start Value M OpDlTmms ING Operate Delay Time O RsDlTmms ING Reset Delay Time O 5.4.6 LN: Directional underpower Name: PDUP Description of this LN see IEC 61850-5 (LN PDPR). This LN shall be used for the underpower part of PDPR. PDUP class Attribute Name Attr. Type Explanation T M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data Common Logical Node Information LN shall inherit all Mandatory Data from Common Logical Node Class. M OpCntRs INC Resetable operation counter O Status Information Str ACD Start M Op ACT Operate T M Settings StrVal ASG Start Value M OpDlTmms ING Operate Delay Time O RsDlTmms ING Reset Delay Time O DirMod ING Directional Mode O 5.4.7 LN: Rate of change of frequency Name: PFRC Description of this LN see IEC 61850-5 (LN PFRQ). This LN shall be used to model the rate of frequency change of PFRQ. One instance shall be used per stage. PFRC class Attribute Name Attr. Type Explanation T M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2)