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Reducing Conventional Copper Signaling in High Voltage Substations with IEC 61850 Process Bus System...
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Transcript of Reducing Conventional Copper Signaling in High Voltage Substations with IEC 61850 Process Bus System...
Reducing Conventional Copper Signaling in High Voltage Substations with IEC 61850 Process Bus System David McGinn, GE Digital EnergyMaciej Goraj, GE Digital EnergyJorge Cardenas, GE Digital Energy
Digital EnergyMultilin
•International Scientific & Technical Conference
•“Actual Trends in Developments of Power System Protection and Automation”, 7-10 September 2009, Moscow
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•2
• Robust and practical process bus architecture is a missing element on the road to implementing the next generation of Protection and Control (P&C) systems
• Successful technical solutions are those that are simple and that address well-defined real problems
• Achieving cost savings
• Reducing project duration
Business Drivers for Process Bus
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•3
P&C System Cost Breakdown
Commissioning24%
Construction21%
Drafting10%
Engineering18%
Materials27%
Labour73%
Total Project Budget (Hard-Wired)of $407,000
Construction7%
Engineering10%
Drafting4%
Commissioning13%
Equivalent Project Budget (Process Bus)of $407,000
Labour73%
Labour34%
Materials42%
Savings25%
“The next generation P&C system should replace copper wiring by placing electronic
modules throughout the switchyard and using fiber communications for bi-directional
exchange of data”
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•4
Design Principles
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•5
Process Bus System PrinciplesCopper connections - the largest source of variability
and cost:
• Replace custom copper connections with standard, pre-terminated fiber optic connections
• Migrate physical variability of connections into software and fiber connectivity
Before … … After
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•6
Design Principles
> Standard magnetic ITs will be in service for a long time:
– Not dependant on installation of non-conventional ITs, but
– Support non-conventional ITs as market acceptance grows
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•7
Design Principles
Maintain traditional P&C concepts:
– Overlapping and independent zones of protection
– One independent device protecting one zone
– Minimum inter-dependencies
LINE 1ZONE
LINE 2ZONE
XFRM 1ZONE
CB-2CB-1
CB-3 CB-4
CB-
5CB-
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Not all the process data is needed by all IEDs. The limited data requirements of each IED are clearly and unambiguously dictated
by the virtually fixed power primary equipment arrangement.
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•8
System Architecture
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•9
System Architecture Process bus Merging Units
installed in the switchyard at direct proximity to HV primary equipment
Provide complete I/O capability for the system
Interface all types of switchgear (CBs+CTs, PTs, free-standing CTs, disconnect and ground switches, sensors)
Data acquisition and outputs only, no processing (future-proof)
Redundant MUs for critical signals
No conventional I/Os in IEDs in relay cabinets
No extra devices in the system (LAN switches, master clocks)
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•10
System Architecture Merging Units connected via
multi-fiber cables (star topology) Fiber cables in trenches, directly
buried when required Merging Units powered via
copper wires integrated in the fiber cable
Prefabricated high-density cable connectors
SwitchyardControlhouse
Outdoorfiber cables
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•11
System Architecture
Brick Brick Brick Brick Brick Brick
UR UR UR
ExistingSCADA
StationHMI
Gateway
PROCESS BUS, IEC 61850
Stat
ion
Inte
rfac
ePr
oces
sIn
terf
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NE
RC
CIP
SE
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RIT
Y B
OU
ND
AR
Y
Station LAN (IEC 61850 Station Bus)
System Components
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•13
System Components
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•14
Outdoor Mounting Scenarios• External, on a Circuit Breaker• External, on a structure• External on VT, CT marshalling box• Internal, old oil-type Circuit Breaker• Etc.,
• Data sharing• Synchronization• Independence of
devices
Advanced Issues
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•16
Multiple MUs in One Physical Device
Common I/Ohardware
Analog Core
Four independent “digital cores”
Direct point-to-point fiber link to relay
Digital communication with data integrity
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•17
Making the ConnectionThe only tools you
will ever need
Brick 2
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Common I/O
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Common I/O
IED 1
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Patch Panel
OutdoorMulti-Fiber
Cable
IndoorMulti-Fiber
Cable
AnalogsDigital InputsDC inputsSSR OutputsForm-C OutputsLatching Output
818 3 4 2 1
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Common I/O
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Common I/O
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Common I/O
IED 1
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CIGRE RUSSIA, 7-10 Sept 2009 Moscow•18
Synchronization
IED 3
IED 4Devices stay independent – - no need for a master clock
Merging Unit
Four independent
“digital cores”
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•19
Synchronization
CIGRE RUSSIA, 7-10 Sept 2009 Moscow•20
Summary• Architecture
– Rugged units to interface all switchyard I/O
– Point to point communication to relays– Relays as synch masters– Multiple MUs inside a physical device
• Comprehensive all-fiber P&C system• Reduces installation & maintenance cost• Intuitive & practical IEC 61850 process bus• Modular & scalable• Improves quality, reliability