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Node-Breaker Modeling in PSS®EJoe Hood
Siemens Power Technologies International
WECC MVWG Meeting March 20th 2014 Salt Lake City
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Node-breaker Modeling in PSS®EKey Points
• Available in Version 34• Planned for Q3 this year• Further integration with later minor releases
• Unobtrusive Implementation• There when you need it, but…• Out of the way when you don’t want it
• Full Integration into SAV and RAW formats• New data records attached to end of RAW file• No changes needed to existing data records to add Node-breaker topology
• Automatic Substation Node-breaker Topology Building• One-click process for building initial-pass topology directly from single line diagram
based on common arrangements (1 ½ breaker, double breaker, ring bus, etc.)• Substation Node-breaker single line diagrams drawn automatically
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Big Picture
Traditional Network Data
Node-breaker Data
Internal Network Model
TopologyProcessor
SLDs
AnalysisEngines
API Scripts
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PSS®E Node-Breaker Terminology
Substation
BusBranch
BranchNodes
Connection Devices
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Substation/Node/Bus Mapping
Substations BusesNodes
11
1
∞ ∞
∞
Key: Sub IDKey: (Sub ID, Node ID)
Key: Bus ID
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Branch Mapping
Node NI
Node NJ
Bus I
Bus J
(I, J, CKT)
Branch/2-winding Connection Record: (I, J, CKT, NI, NJ)3-winding Connection Record: (I, J, K, CKT, NI, NJ, NK)
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Terminal Device Connection Mapping
Node N1
Bus I
(I, MACHID)
Connection Record Format for All Device Types: (I, ID, NI)
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Mapping Example
1
2
34
5
6
7
8
9 10
(101, 102, ‘1’)
101
102
Substation 1
(101, ‘1’)
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RAW Format Extension
Substation Data
Node Data
Station Switching Device Data
Branch/Two Winding Connection DataThree winding transformer Connections
Load Connections
Shunt Connections
Machine Connections
Switched shunt Connections
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Substation Record
IS
Substation number (1 through 999997). No default allowed
NAME substation name, NAME may be up to twelve characters and may contain any combination of blanks, uppercase letters, numbers and special characters. NAME must be enclosed in single or double quotes if it contains any blanks or special characters. NAME is twelve blanks by default.
LATI
Substation latitude in degrees (-90.0 to 90.0). It is positive for North and negative for South, 0.0 by default
LONG Substation longitude in degrees. (-180.0 to 180.0). It is positive for East and negative for West, 0.0 by default
SRG Substation grounding DC resistance in ohms
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Node Record
IS Substation number (1 through 999997). No default allowedNI Node number (1 though 99). No default allowed.NAME Node name, NAME may be up to twelve characters and may
contain any combination of blanks, uppercase letters, numbers and special characters. NAME must be enclosed in single or double quotes if it contains any blanks or special characters. NAME is twelve blanks by default.
I
Topological Bus number (1 though 999997) in bus branch model. The electrical bus represents this node NI and others that are connected by closed switching devices.
STATUS Node status. One for in-service and zero for out-of-service, one by default.
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Connection Device Record
IS Substation number (1 through 999997). No default allowedNI From node number (1 though 99). The from node must be in the
substation IS. No default allowed.
NJ To node number (1 though 99). The to node must be in the substation IS. No default allowed.
CKTID two-character uppercase non-blank alphanumeric switching device identifier; CKT = 1 by default.
NAME Switching device name, NAME may be up to 12 characters and may contain any combination of blanks, uppercase letters, numbers and special characters. NAME must be enclosed in single or double quotes if it contains any blanks or special characters. NAME is 12 blanks by default.
TYPE C - Circuit breaker, S - Disconnect switch, Others..
STATUS
Switching device status. one for close and zero for open; ST = 1 by default.
NSTAT Switching device normal status. one for close and zero for open; ST = 1 by default.
X Switching device reactance; entered in pu. A non-zero value of X must be entered for each switching device. 0.0001 by default
RATE1 First rating; entered in either MVA or current expressed as MVA.
RATE2 Second rating; entered in either MVA or current expressed as MVA.
RATE3 Third rating; entered in either MVA or current expressed as MVA.
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Branch/Two Winding Connection Record
I From bus number. No default allowed.
J To bus number. No default allowed.
CKTID two-character uppercase non-blank alphanumeric switching device identifier; CKT = 1 by default.
NI From node number (1 though 99). If the electrical from bus has node breaker model, in other words it represents a set of nodes in a substation, the from node must be one node in the set and indicates the connections of branch within the substation. If the electrical from bus has no node breaker model, it is zero. No default allowed.
NJ To node number (1 though 99). If the electrical to bus has node breaker model, in other words it represents a set of nodes in a substation, the to node must be one node in the set and indicates the connections of branch within the substation. If the electrical to bus has no node breaker model, it is zero. No default allowed.
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Load Connection Record(Representative of Terminal Device Connection Records)
I bus number. No default allowed.
ID One- or two-character uppercase non-blank alphanumeric load identifier used to
distinguish among multiple loads at bus I. It is recommended that, at buses for which
a single load is present, the load be designated as having the load identifier 1. ID = 1
by default.NI node number (1 though 99). If the electrical bus has node
breaker model, in other words it represents a set of nodes in a substation, the node must be one node in the set and indicates the connections of the load within the substation. If the electrical bus has no node breaker model, it is zero. No default allowed.
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RAW Example
0 // Substations (I, STNAME, X, Y):1 'SUB 153' 1.0 1.00 // Nodes (SUBSTATION, BNODE, I, 'NODE NAME', STATUS):1 153 1 'SECTION 1 ' 11 153 2 'SECTION 2 ' 11 153 3 'SECTION 3 ' 11 153 4 'SECTION 4 ' 10 // Breakers (SUBSTATION, I, J, CKT, NAME, STATUS, NSTATUS, TYPE, X,...):1 1 2 '@1' 'BREAKER ' 1 1 0 0.00000 0.00010 0.0 0.0 0.0 1 2 3 '@1' 'BREAKER ' 1 1 0 0.00000 0.00010 0.0 0.0 0.0 1 3 4 '@1' 'BREAKER ' 1 1 0 0.00000 0.00010 0.0 0.0 0.0 1 4 1 '@1' 'BREAKER ' 1 1 0 0.00000 0.00010 0.0 0.0 0.00 // Branch Terminals (IBUS, JUBS, CKT, INODE, JNODE):153 154 '1 ' 2 1153 154 '2 ' 3 2153 3006 '1 ' 4 0153 152 '1 ' 1 0
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Automatic Substation Building
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Automatic Substation Building
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Substation Data Persistence
• RAW File• Topology/Connectivity• Bus/Node Mappings• Switching Status
• Substation SLDs• Substation Layout• Annotations• Diagram Primitives (Drawings)
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Node-breaker SLD Links
Substation SLD
Bus-branch SLD
• Allows navigation between the two worlds
• We’re still working on the proper visual design and user experience• What should a bus look like vs a
Node?• Should double-clicking bus show• Node-breaker substation?
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Managing Substation SLDs
PSS®E File Data Manager
PSS®E
Substation SLD Repository
Setup Master Directoryfor SLD Files
• … Or just build substation diagrams on the fly on demand as needed.• Managing SLDs only necessary if you want to maintain a specific layout
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Interacting with Node-breaker Model
• Open/close breakers in SLDs• Edit data in network data grids• Manipulate via APIs• Soon to be incorporated in
CON/MON/SUB syntax, RAS definitions, etc
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Example APIs
# add/change substation data:station_data(i, realar, name)
# add/change node data:node_data(is, i, intgar, name)
# add/change switching device data:station_swd_data(is, i, j, ckt, intarg, realar, name)
# build substation topology:sbuildmodel(option, i)
# open beakers necessary to deenergize lineopen_line_with_breakers(I, J, CKT)
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Joe HoodProduct Manager – PSS®ESiemens PTI
Phone: +1 (803) 399-0563
Email: [email protected]
Contact