1. Visibility
Ramu Ramanathan
10/1/2007

2. Agenda Visibility Overview Status Issues
WECC
ColumbiaGrid
Issues
Preliminary Thoughts Regarding Conclusions and Recommendations
Next Steps 2

3. Visibility Overview

4. Model Area Model Area 4 Actual WECC System Future Model
WECC Planning Model
SE Model
Network
equivalence
WECC substations
Not in WECC planning
model
Future Model
Model Area 4

5. WSM Project 5

6. Stage 1 – Operational Network Model
RMRC
(WAPA)
PNSC
(BPA)
CMRC
(PG&E)
WECC Merged
Operational
Model
Network
Validation
Power
Flow
Online
Display 6

7. Stage 2 – SCADA & SE WECC WON 7 WECC Operational Network Model
State Estimator
System
WECC SCADA Model
SCADA
System
WECC ICCP Model
ICCP
System
WECC
WON 7

8. Stage 3 – WECC Customization
State Estimator Customs
Remedial Action Schemes
PowerTech Applications
TSAT – Transient Stability
VSAT – Voltage Stability 8

9. System Model Objective
WSM is the heart for system reliability. It will be used for estimating the system states and evaluating the system reliability.
WSM is also going to be used for operation and system planning studies.
Model needs to be accurate as much as possible. Most of the variance currently present need to be cleaned up.
Proper tools, methodology, process and resources need to be identified to maintain the quality and accuracy of the model.
Results will be as good as the model 9

10. WSM Possible Users WSM Provides Common Network Model for
Reliability Entities (RE)
Planning Entities (PEs)
Reliability Coordinators (RCs)
Balancing Authorities (BAs)
Planning Authorities
Transmission Operators
Resource Planners
Standards Developers 10

11. Status – WECC Schedule Phase 1 – 1st Qtr 2008 (est 4th Qtr 2008)
Stage 3
Stage 2
Stage 1
Stage 1 Q4
2006 Q1
2007 Q2 Q3
2008
Phase 1 – 1st Qtr 2008 (est 4th Qtr 2008)
Phase 2 – est (????)
Phase 3 – est (????) 11

12. Status – ColumbiaGrid Activities
Signed - Development and Staffing Reliability Functional Agreement
Appointed Norm, Darrell, Ramu to support these activities 12

13. Overview of Agreement - Visibility Enhancements
CG will assist in Western Interconnection-wide and region-wide efforts to enhance the visibility for
Reliability Coordinators
Transmission Operators/Owners
Assist WECC’s in the development, testing, implementation and maintenance of
West-wide Model
Similar tools
Recommend to Reliability Parties regarding workable Visibility tools for their respective Transmission Systems and the Regional Interconnected System.
Deliverables
Establish presence in certain reliability forums
Gain experience and knowledge
Develop recommendations regarding future actions of parties, including potential roles for ColumbiaGrid
Publish interim recommendation (Date ??/??/??) 13

14. Visibility Enhancements Issues…….
We need to identify approaches for following issues
Currently there is a clear plan how WSM is going to be used by WECC but not by members.
3 different bus names (Need cross reference)
West Wide Model
Operation
Planning
Utilities need to come up with a method to synchronize their model with West Wide Model on the ongoing basis (Planning and operation)
Need to merge the model below 100 KV and validate
Additional tools are required to develop a planning model from the network model.
Model differences in operation and planning (Multi section lines, transformers, DC lines……….)
Currently data maintenance process between planning and operation has lot of gaps.
Few members are performing operation studies. Others need to perform operation studies based on current operating conditions to optimize the system and meet system reliability. (Next hour, next day and week)
Bus and node orient model issues
Need to identify the software licenses provided by AREVA for CG members 14

15. Visibility Enhancements Issues……. (Cont.,)
Equipment Model Issues & variables
Modeling methods are not consistence
Generators (Hydro, Thermal, Water level, temperature…..)
MW limits
MVAR limits
Transformers (Tap, impedance, model…)
Line data
Line connected shunts
Multi section lines
Shunts (Value, Base KV, no of shunts, location)
DC Line modeling
Load
Sub transmission modeling & Equivalent model
Data quality need to be validated 15

16. Preliminary Thoughts regarding Conclusions and Recommendations

17. Visibility Enhancements West-wide Model Initial Development
BPA
CAISO
Validate
Merged
WSM
100 KV and above
Initial
WSM
WAPA 17

18. Visibility Enhancements West-wide Model Maintenance
Online
Model
New
Model
WECC
Validate
Every
2 weeks
Update To
Current Model 18

19. Visibility Enhancements West-wide Model - Planning
Dump
Process
CIM/GE/PTI
WSM
Add Lower
KV model
Validate
Add Future
Equipments
Validate
Planning
Model 19

20. Next Steps
Identify how GC members can use the WSM model – Identify gaps
Identify the process to cleanup, test and maintain the WSM
Establish presence in certain reliability forums
GC Gain experience and knowledge
Develop recommendations regarding future actions of parties, including potential roles for ColumbiaGrid
Publish interim recommendation 20