Challenges in testing iec61850 ver 3
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Transcript of Challenges in testing iec61850 ver 3
Testing Challenges : IEC61850
Jun Verzosa, Nestor Casilla, Jay Gosalia
Doble Engineering Company
Presentation topics
Introduction
What is IEC61850
Differences from Traditional sub station
Advantages
Architecture and Data Structure
Testing Simple distribution bus protection
Conclusion
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What is IEC 61850 ?
Basic Concept : IEC61850
Inter OperabilityInter Operability
Core Idea IEC 61850
The core idea is a description language, that completely describes the data structure and functionality of a substation information system in a standardized manner.
The core idea is a description language, that completely describes the data structure and functionality of a substation information system in a standardized manner.
What Is IEC 61850?
International Standard
More than a Protocol
Substation AutomationBorrowed from Siemens
SubstationLAN Network
HMI
Muti Vendor Inter- Operability
Standardized language understood by devices of different manufacturers: key goal of IEC 61850
IEC 61850
Borrowed from Siemens
Conventional Sub - StationControl Centre Station HMI
Relay X1
RTU
Conventional Switchgear
ConventionalCT / VT's
Relay X2
Relay X1
Conventional Switchgear
Relay X2
ConventionalCT / VT's
Interlocking logic
Hardwired with parallel Copper wires
IEC 61850 Comm. Architecture
Control Center
Gateway
Relay X1
Bay Controller
Intelligent Switchgear
Non conventional
CT/VT
Relay X2
Relay X1
Bay Controller
Intelligent Switchgear
Relay X2
Non conventional
CT/VT
Station HMI
Ethernet communication:Elimination of wiresAccess to informationOptimized functionality
Station Ethernet Bus
Process Bus
IEC 61850 Comm. Architecture
Control Center
Gateway
Relay X1
Bay Controller
Intelligent Switchgear
Non conventional
CT/VT
Relay X2
Relay X1
Bay Controller
Intelligent Switchgear
Relay X2
Non conventional
CT/VT
Station HMI
Station Ethernet Bus
Process Bus
Changes to IEC61850 sub station
Copper wiring is replaced by Ethernet cable
Ethernet switches connects different IEDs
GOOSE messages are equivalent to interconnect wires
Typically a bit position indicates the status of IED : 0 = Off, 1= On
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What Is IEC 61850?
IEC 61850 is more than a protocol, it’s an architecture
Pro
cess
L
evel
Bay
L
evel
Sta
tio
n
Lev
el HMI
Station Bus
Process Bus
Borrowed from Siemens
What Is IEC 61850?
Pro
cess
L
evel
Bay
L
evel
Sta
tio
n
Lev
el HMI
Station Bus
Process Bus (sampled analog values)
Borrowed from Siemens
Conventional CTs and VTs with hard wiring are used today
Advantages of IEC61850
No copper interconnection
Reduced set up and configuration
No transducers and SCADA interface
Interoperability
Reduced manual efforts and errors
More capability and flexibility
Features of IEC61850
Self describing devices
Standardized devices & Object model
Standardized configuration language
Modern networking technology
Object naming
Publisher & Subscriber
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21
3*V,3*I
52b
CR
Breaker Trip
BFI50BF
79ARI
86BF
Trip Relay
52b
Breaker Close
Bus Breaker Trip
Relay 21 subscribes to 52b and Carrier Received Relay 21 publishes Breaker Trip, BFI, ARI
Relay 50BF subscribes BFI from 21 Relay 79 publishes Breaker Close Relay 79 subscribes to ARI form 21.
IEC61850 : Device Definition
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CB1
IED1
PTOC
RREC
XCBR
XSWI
MMXU
MMTR Metering
CSWI
CSWI
Measurement Unit
Disconnect Switch
Indication & Control
Circuit Breaker
Indication & Control
Auto Reclosing
Time Over Current
Accessing Data : Windows Explorer
PTOC (Time Over Current LN )RREC (Autorecloser LN )XCBR (Switchgear – Circuit Breaker)CSWI (Control - Circuit Breaker)XSWI (Switchgear – Disconnect)CSWI (Control - Disconnect)MMXU (Measurement Unit)MMTR (Metering)
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+
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IED1 IED1
+
+
Borrowed from Siemens
IED1/XCBR
Accessing Data : Tree view
Mode (Mode)Beh (Behavior )Health (Health)Name (Name plate)Loc (Local operation)EEHealth (External equipment)EEName(External equipment name plate)OperCnt (Operation counter)Pos (Switch position)BlkOpen (Block opening)BlkClos (Block closing)ChMotEna (Charger motor enabled)CBOpCap (Circuit breaker operating capability)POWCap (Point On Wave switching capability)
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+
+
+
+
+
+
+
+
+
+
+
+
+
XCBR
PTOCRREC
+
+
-
IED1/XCBRIED1
Borrowed from Siemens
IED1/XCBR.Pos
Accessing Data : Tree view
Mode (Mode)Beh (Behavior )Health (Health)Name (Name plate)Loc (Local operation)EEHealth (External equipment)EEName(External equipment name plate)OperCnt (Operation counter)Pos (Switch position)
+
+
+
+
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+
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+
-
XCBR
PTOCRREC
+
+
-
ctlValstValpulseConfigoperTimq…more
intermediate-state (0)off (1)on (2)bad-state (3)
IED1/XCBR.PosIED1
Borrowed from Siemens
IED1/XCBR.Pos.stVal
IEC61850 Data Communication
DN
P 3
.0
(to
EM
S/S
CA
DA
IED 1 Data“67 TOC Pick-up”
“CB1 is Closed”
“I Phase A is 200A”
“V Phase A is 26.3kV”
IED1/PTOC.Start.general IED1/XCBR.Pos.stVal
IED1/MMXU.A.phsA.mag
IED1/MMXU.V.phsA.mag
61850 Messages
HMI LinkageCB pos = IED1/XCBR.Pos.stVal
67 TOC PU = IED1/PTOC.Start.general
Ia = IED1/MMXU.A.phsA.mag
Va = IED1/MMXU.V.phsA.mag
CB1
IED1
Borrowed from Siemens
• L System LN (2)• P Protection (28)• R Protection related (10)• C Control (5)• G Generic (3)• I Interfacing and archiving (4)• A Automatic control (4)
• M Metering and measurement (8)• S Sensor and monitoring (4)• X Switchgear (2)• T Instrument transformers (2)• Y Power transformers (4)• Z Further power system
equipment (15)
• Examples: Logical node classes• PTOC: Time overcurrent prot.• PDIF: Differential protection• RBRF: Breaker failure• XCBR: Circuit breaker
• GGIO: Generic logical node• CSWI: Switch controller• MMXU: Measurement unit• YPTR: Power transformer
Logical node groups
Logical Nodes
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BayA1/Q0XCBR1.Pos.ctlVal
Local Device Name (free)
Logical Node Name Prefix (free)
Data Object Name (fixed)
Attribute Name (fixed)
Logical Node Class (fixed)
Logical Node Name Suffix (free)
Addressing a Data item
Simple Bus Protection
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Feeder A Feeder B Feeder C
Incomer X
Block Trip
PTOC PU
Trip
Trip
Simple Bus Protection
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Feeder A Feeder B Feeder C
Incomer X
Block Trip
PTOC PU
Trip
Trip
Simple Bus Protection
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Feeder A Feeder B Feeder C
Incomer X
Block Trip
PTOC PU
Trip
Trip
Testing : Traditional Way
• Test individual relay and its performance• Test overall scheme• Test operating time, scheme logic etc.• Monitor inputs & outputs during testing• Relay output : To test instrument’s input to
record relay response• Test instruments outputs : To Relay input
to simulate system events
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Test Relay Feeder A
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Communication
Current TripOutput
Gen. Start
Test Feeder A
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Test Relay Incomer
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Communication
Current
Trip output
BlockTrip
Test Incomer : Feeder Fault
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Incomer Test : Timers &Outputs
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Incomer Test : Bus Fault
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IEC61850 Testing
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List the publishing and subscription messages ≡ Input and outputs
Assign publishing messages to inputs of F6150 : GN1..GN99
Assign subscription messages to output of F6150 : GP1..GP99
Use the same test plan as if testing the traditional way
GOOSE Message
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GOOSE
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GOOSE Messages
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GOOSE Mapping : Inputs
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Final Step : Save and Send
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Testing : IEC61850
Same test plan can be used : GN instead of LN
Map inputs & outputs to GOOSE
Inputs & Outputs : GOOSE msg. on Ethernet
GOOSE acts as traditional inputs and outputs
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Protection Testing Feeder A
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Feeder A Feeder B Feeder C
Incomer X
Trip
Trip
BCU
BCU
• Apply current to feeder A and test set starts the timer• PTOC will starts and sends GOOSE message to Incomer to block trip.• When PTOC element trips, it will send GOOSE message & BCU will trip Feeder A• Test set stops the timer when GOOSE message from PTOC trip is received
Protection Testing Incomer X
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Feeder A Feeder B Feeder C
Incomer X
Trip
Trip
BCU
BCU
• Apply current to Incomer X protection and test set starts the timer• PTOC will starts and wait for the GOOSE message from one of the feeder• After a short time delay if GOOSE message from the feeder is not received,
Incomer X protection will send a GOOSE trip message to trip breaker• Test set stops the timer to time the overall trip time
Protection Suite : IEC61850
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Messages
• Define GOOSE messages• Discover, import SCL
Dataset
• Select dataset item for testing• Assign to F6 Inputs and outputs
Configure
• Download data items and I/O mapping to F6150
Protection Suite : IEC61850
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Select GOOSE messages & Dataset items
Discover Messages or Import SCL or enter manually in GSE
GOOSE Testing : GN and GP
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Testing IEC61850 IEDs using F6150
Step 1. “Discover” or “Import” GOOSE Messages, select data items for use as inputs and outputs; or Open the relevant Saved CFG file
Feeder A Feeder B Feeder C
Incomer X
Trip
Trip
BCU
BCU
Testing IEC61850 IEDs using F6150Step 2. Connect F6150 (if not yet connected)
Step 3. Configure F6150 for GOOSE I/O messages of Download CFG
Step 4. Perform Tests
Feeder A Feeder B Feeder C
Incomer X
Trip
Trip
BCU
BCU
Testing Comparisons
Traditional testing
Protection response is recorded via its contacts connected to test
instruments LN1..LN8
Test instrument’s programmable outputs simulates the event :via
LP1..LP8
IEC61850 Testing
Test instruments Senses input by published GOOSE messages
via GN1..GN99
Test instruments can simulate output by publishing GOOSE
message via GP1..GP99
Existing test plan can be used with change in sense conditions
Like LN1 to GN1
IEC61850 : Troubleshooting
Connect the laptop to the network, start the software & monitor just about anything & everything
Safer then trouble shooting live circuit with meter and probes
Can be done remotely
Wiring change done by programming change
Change configuration by programming change
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Challenges : IEC61850
Modifications
Documentation
Relay functions
Network knowledge
Learning Curve
•Done by its CID file•Need to reload new CID file
•Use the correct CID file•Archive the modified CID file
•Retest after modification•As we do it after a wiring mod
•Understanding of the network•Not needed for tradition testing
•Trouble shooting is restricted if one cannot log on
•Understanding new ways of testing
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Summary
IEC61850 brings advantages and challenges
Continuous supervision of the system
Economical installations : no copper wires
Easier modifications : changes via PC
Remote monitoring : Complex but powerful
Test engineer need to learn new way of testing
PC familiarity is a must
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Any Questions?
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