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Node-breaker model

Node-breaker model. January 23 2014 TSS J. Gronquist, S. Kincic. West-wide System Model (WSM) as example of node-breaker model. WECC WSM is a product of the three existing RCO models (RDRC, CMRC, and PNSC) CIM XML formatted Models (RDRC & CMRC) & Areva EMS Netmom (PNSC) were merged

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Node-breaker model

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  1. Node-breaker model January 23 2014 TSS J. Gronquist, S. Kincic

  2. West-wide System Model (WSM) as example of node-breaker model • WECC WSM is a product of the three existing RCO models (RDRC, CMRC, and PNSC) • CIM XML formatted Models (RDRC & CMRC) & Areva EMS Netmom (PNSC) were merged • Merged Model required clean-up: removal of duplicate lines & substations, standardization of basic modeling methodology & naming conventions • Result: West-wide System Model (WSM) Areva EMS Netmom PNRC (Areva) CMRC(ABB) RDRC(GE Harris)

  3. West-wide System Model (WSM) - usage • WECC RC (Peak Reliability) run SE every minute and RTCA every 5 minutes; • Next day operation studies; • Near real time studies as needed; • Used for update for BPA and CAISO SE external model; • Providing access to WECC members to advanced applications; • Post cases in PTI30 and .csv format daily at www.peakrc.com

  4. WSM vs. basecase • Planning Basecase – Cholla 500kV (1-bus:14000)

  5. WSM vs. basecase (bus number) • WSM Model – Cholla 500kV (4-busses)

  6. WSM vs. basecase • WSM Model – Cholla 500kV (4-busses)

  7. WSM vs. basecase • WSM Model – Cholla 500kV (4-busses)

  8. Node-breaker vs. bus-brunch model: • Node-breaker model is more flexible: • It can represent all operating conditions; • Allows more accurate modeling of RASs (SPS) and contingencies; • There is usually no convergence problems; • Can easily be benchmarked against measurements; • Event analysis-SE case is saved automatically; • Corrective switching action; • Needs for more frequent studies-renewable resources ; • Dynamic assessment of SOLs; • Stuck breaker; • Lot of base-cases;

  9. Model Detail • To the right is a redacted detail of what the topology of the 500 kV bus at Grand Coulee • It’s a Breaker and a Half configuration • This would be a single bus in a “planning case”

  10. Planning Case Bus View

  11. Breaker a4 Out for Maintenance • Now what happens when Line A is taken out of service?

  12. Invalid Contingency SimulationsExample 2 Line D isolated from Line B and Line C

  13. PSLF • PSLF to read WSM in node breaker format in V19; • PSLF to match .dyd file to WSM using EMS names;

  14. WSM vs. basecase (WSM in PSLF)

  15. Building node-breaker model • Model Update Process: • WECC RC Modeling Engineers use the Alstom E-terrasource modeling tool to build (RC’s BCCS) • Each modeler works in their own independent workspaces • Allows for parallel modeling - can have different models & projects loaded • Avoids the issue of shared resources • Avoids the risk of “one-corrupts-all” • Avoids the need for close-coordination of work (e.g. when performing validation, model export) • Each modeler begins with the latest Model Authority Set – MAS (most recent model “basecase”) to create their projects • Model Integrator integrates the projects together, validates, and create a new MAS

  16. Modeling in E-terrasource Network ParameterData

  17. Modeling in E-terrasource (GUI) Node ConnectivityData Node 900C Node 900D

  18. Modeling in E-terrasource (GUI) Graphical Modeler

  19. West-wide System Model (WSM) • Model Export Formats: • PTI Raw File Format • Mapping done via Alstom Translation Table Mapping, manually maintained by WECC RC Modeling Staff • Alstom Netmom Savecase • CIM version 12 • Powerworld CSV File Format ** WSM is available to signatories of the WSM License Agreement or the Universal NDA

  20. Continuous Model Validation • Running state estimation once every minute results in continuous model validation; • Comparing measurements (kV, MW, MVARs) to powerflow solution; • Peak Reliability has 24x7 monitoring support of the State Estimator solution quality;

  21. Model Validation-Dynamic • System event: Arlington plant trip and loss of Palo Verde unit on 04/07/2012 • Differences: • Some difference in in initial conditions; • Differences in power flow data; • No plant load in WSM; • Not all units are matched in .dyd file; • Composite load model used with base-case; • WSM in TSAT and base-case in PSLF;

  22. Progress update: dynamic

  23. Progress update: dynamic

  24. Questions?

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