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

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

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

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

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

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

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

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

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