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

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Presentation on theme: "Node-breaker model January 23 2014 TSS J. Gronquist, S. Kincic."— Presentation transcript:

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

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

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

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

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

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

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

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

9 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” Model Detail

10 10 Planning Case Bus View

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

12 12 Invalid Contingency Simulations Example 2 Line D isolated from Line B and Line C

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

14 14 WSM vs. basecase (WSM in PSLF)

15 15 Model Update Process: o WECC RC Modeling Engineers use the Alstom E-terrasource modeling tool to build (RC’s BCCS) o 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) o Each modeler begins with the latest Model Authority Set – MAS (most recent model “basecase”) to create their projects o Model Integrator integrates the projects together, validates, and create a new MAS Building node-breaker model

16 16 Modeling in E-terrasource Network Parameter Data

17 17 Modeling in E-terrasource (GUI) Node Connectivity Data Node 900C Node 900D

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

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

20 20 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; Continuous Model Validation

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

22 22 Progress update: dynamic

23 23 Progress update: dynamic

24 Questions?

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