1. Restricted © Siemens Industry, Inc. 2014 All rights reserved.Answers for infrastructure and cities. Node-Breaker Modeling in PSS®E Joe Hood Siemens Power Technologies International WECC MVWG Meeting March 20 th 2014 Salt Lake City

2. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 2Siemens Power Technologies International Node-breaker Modeling in PSS®E Key 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 dont 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

3. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 3Siemens Power Technologies International Big Picture Traditional Network Data Node-breaker Data Internal Network Model Topology Processor SLDs Analysis Engines API Scripts

4. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 4Siemens Power Technologies International PSS®E Node-Breaker Terminology Substation Bus Branch Nodes Connection Devices

5. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 5Siemens Power Technologies International Substation/Node/Bus Mapping Substations Buses Nodes 1 1 1 Key: Sub ID Key: (Sub ID, Node ID) Key: Bus ID

6. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 6Siemens Power Technologies International 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)

7. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 7Siemens Power Technologies International Terminal Device Connection Mapping Node N1 Bus I (I, MACHID) Connection Record Format for All Device Types:(I, ID, NI)

8. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 8Siemens Power Technologies International Mapping Example 1 2 3 4 5 6 7 8 910 (101, 102, 1) 101 102 Substation 1 (101, 1)

9. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 9Siemens Power Technologies International RAW Format Extension Substation Data Node Data Station Switching Device Data Branch/Two Winding Connection Data Three winding transformer Connections Load Connections Shunt Connections Machine Connections Switched shunt Connections

10. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 10Siemens Power Technologies International 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 SRGSubstation grounding DC resistance in ohms

11. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 11Siemens Power Technologies International Node Record ISSubstation number (1 through 999997). No default allowed NINode 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. STATUSNode status. One for in-service and zero for out-of-service, one by default.

12. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 12Siemens Power Technologies International Connection Device Record ISSubstation number (1 through 999997). No default allowed NI 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. TYPEC - 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 RATE1First rating; entered in either MVA or current expressed as MVA. RATE2Second rating; entered in either MVA or current expressed as MVA. RATE3Third rating; entered in either MVA or current expressed as MVA.

13. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 13Siemens Power Technologies International Branch/Two Winding Connection Record IFrom bus number. No default allowed. JTo 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. NJTo 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.

14. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 14Siemens Power Technologies International Load Connection Record (Representative of Terminal Device Connection Records) Ibus 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. NInode 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.

15. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 15Siemens Power Technologies International RAW Example 0 // Substations (I, STNAME, X, Y): 1 'SUB 153' 1.0 1.0 0 // Nodes (SUBSTATION, BNODE, I, 'NODE NAME', STATUS): 1 153 1 'SECTION 1 ' 1 1 153 2 'SECTION 2 ' 1 1 153 3 'SECTION 3 ' 1 1 153 4 'SECTION 4 ' 1 0 // 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 0.0 0 // Branch Terminals (IBUS, JUBS, CKT, INODE, JNODE): 153154'1 '21 153154'2 '32 1533006'1 '40 153152'1 '10

16. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 16Siemens Power Technologies International Automatic Substation Building

17. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 17Siemens Power Technologies International Automatic Substation Building

18. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 18Siemens Power Technologies International Substation Data Persistence RAW File Topology/Connectivity Bus/Node Mappings Switching Status Substation SLDs Substation Layout Annotations Diagram Primitives (Drawings)

19. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 19Siemens Power Technologies International Node-breaker SLD Links Substation SLD Bus-branch SLD Allows navigation between the two worlds Were 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?

20. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 20Siemens Power Technologies International Managing Substation SLDs PSS®E File Data Manager PSS®E Substation SLD Repository Setup Master Directory for 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

21. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 21Siemens Power Technologies International 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

22. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 22Siemens Power Technologies International 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 line open_line_with_breakers(I, J, CKT)

23. 03-19-2014 Restricted © Siemens Industry, Inc. 2014 All rights reserved. Page 23Siemens Power Technologies International Joe Hood Product Manager – PSS®E Siemens PTI Phone: +1 (803) 399-0563 Email: joseph.hood@siemens.comjoseph.hood@siemens.com Contact