ColumbiaGrid Planning Update to PCC Marv Landauer October 7 2014 Variable Transfer Limit Studies f or COI Regional Planning Processes Order 1000 2015 Biennial Plan Economic Planning Studies ColumbiaGrid Planning ID: 772216
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ColumbiaGrid Planning Update to PCCMarv LandauerOctober 7, 2014
Variable Transfer Limit Studies for COI Regional Planning ProcessesOrder 10002015 Biennial PlanEconomic Planning StudiesColumbiaGrid Planning2
Avista Corporation Bonneville Power AdministrationChelan County PUDCowlitz County PUDDouglas County PUDEnbridge Grant County PUD Puget Sound Energy Seattle City Light Snohomish County PUD Tacoma Power 3 Members and Planning Participants
4Variable Transfer Limit Study for COI Updates to VTL numbers for EIM implementationUtilizing collaborative methodology developed last springhttp://www.columbiagrid.org/download.cfm?DVID=3570
1. Customer Service Impacts Acceptable voltage ranges for transmission busses2. System Equipment Impacts No manual operation of equipment especially RAS within the scheduling period3. Reliability Impacts Contingency analysis of critical points from #1 and #2VTL Methodology5
6VTL Study for COI Power Engineers is performing the studyState Estimator cases used as starting pointsAnalyzing 2-week periods for 3 seasonsSpring (for Fall and Spring operations)WinterSummer
7VTL Study for COI ( cont)Approximately 300+ cases per seasonFor COI study, simulate transfer between CA/PNWCA generation: Midway and Bay AreaPNW generation: Gorge wind and Mid Columbia hydroOngoing study, anticipated completion – Oct 2014
8WECC Regional Planning Central Ferry-Lower Monumental Planning Review GroupPDCI Upgrade Project RatingWest of McNary Reinforcement Rating Process
9Order 1000 FERC responded to ColumbiaGrid filing on September 18.ColumbiaGrid is comprised of both jurisdictional and non-jurisdictional membersCost allocations are binding to enrolled membersNon-jurisdictionals can choose to enroll60 days to refile with FERC
10Biennial Plan Sensitivity StudiesFour sensitivity studies are ongoingComprehensive N-1-1 outages studyNW Washington Load Area IROL verification in the planning horizonPost Contingency voltage angle differencesMaximum area generation during light loadThe study results will be presented in upcoming planning meetings and included in the next Biennial Plan
11Economic Planning StudyBackcast 2010: Backcast power flow on key paths within WECCWest of Cascades North and South, Montana to NW, Idaho to NW, COI, PDCI, WOR, ..Input actual loads, fuel cost, transmission system,Learn what modeling techniques are required to mimic historic operationsForecast 2014, and 2017:Apply lessons learned in the backcast to the forecast runs.This assumes that future operations will mimic historic operationsCompare loading of lines/paths, congestion, change in flow patterns and area losses
Economic Planning Study Coal Retirement Study: Evaluate location impact of replacement capacity for Centralia on the Pacific Northwest transmission systemThree areas are being considered for replacement capacity: Centralia area, North of Seattle, and Stanfield Area (McNary to Boardman)Replacement capacity is assumed to be combine cycleRun with 2017 loads: This eliminates the need to install new capacity to meet load growth and reserves for 2024 (+19,000 MW of additional supply)Include announced Coal retirements, replacement projects and fuel conversion to NG (impacting 6,500 MW of ST-Coal from 2013)Include California Once Through Cooling retirementsSensitivities on potential retirement of Colstrip 1&2 and additional wind in Montana
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