1. Western Electricity Coordinating Council
MOD-033 Discussion
Kent Bolton
Western Electricity Coordinating Council

2. Western Electricity Coordinating Council
MOD-033
Steady-State and Dynamic System Model Validation
Building of Planning Models to Analyze the Reliability of the Interconnected Transmission System
Western Electricity Coordinating Council

3. Western Electricity Coordinating Council
Model Validation
Focus not on Interconnection-wide phenomena but on PCs portion of the existing system.
Dynamic local event – produces some measurable transient response
Western Electricity Coordinating Council

4. Standard Requirements
Comparison of PCs system to Power Flow model
Comparison of PCs system in Planning Dynamic Model to actual system response
Western Electricity Coordinating Council

5. Western Electricity Coordinating Council
MVWG Guideline
MOD-033 Guideline
References NERC MWG “Procedures for Validation of Powerflow and Dynamics Cases”
Western Electricity Coordinating Council

6. Western Electricity Coordinating Council
Event Selection
Useful disturbances for study produce significant level of MW and MVAr variation.
MVWG TF proposed to evaluate disturbances
Western Electricity Coordinating Council

7. Western Electricity Coordinating Council
Steady State Data
Obtain state estimator (or SCADA and PMU) data – prior to and following event
Select WECC Op case that matches actual system conditions as closely as possible
Modify w/gen dispatch, topology and load changes
Compare parameters: Bus voltages, MW & MVAr on elements and paths, gen dispatch, PS settings
Proposal: distribution of updated model to PCs for 3 weeks
Western Electricity Coordinating Council

8. Western Electricity Coordinating Council
Dynamics Data
Start w/associated dynamics file
Adjust governor parameters within reason, add gen models to allow clean dynamic initialization
No-disturbance should be flat, ringdown should be damped, etc.
Western Electricity Coordinating Council

9. Western Electricity Coordinating Council
Comparison
Comprehensive detailed switching sequence necessary (source?????)
Run simulation and compare to actual system results. Can include V, MW & MVAr flows, generator behavior, etc. (review MWG document)
Western Electricity Coordinating Council