SPP org 1 ITP 20 Flowgate Selection Introduction
- Slides: 17
SPP. org 1
ITP 20 Flowgate Selection Introduction Timothy Miller July 21 st, 2010 TWG Teleconference
Flowgate Simulation Impact • In the economic simulations flowgates are the only flow control mechanism Ø Line limits are not heeded by default Ø Penalties associated with an overload provide control • Manage the economic dispatch Ø Key to a reasonable economic solution SPP. org 3
Selecting Reasonable Flowgates • Staff is developing flowgates based upon the ITP 20 Year Assessment Scope document • Preferred outcomes Ø Spreadsheet listing the flowgates Ø Charts summarizing the simulated data Ø Maps showing congestion SPP. org 4
Flowgate Selection Criteria SPP. org 5
Flowgate Selection Criteria • Starting Point Ø NERC Book of Flowgates • Additional criteria Ø 345 k. V Contingencies Ø 115+ k. V Monitored Elements Ø Evaluate 8, 760 hours SPP. org 6
Flowgate Selection Criteria • Additional criteria Ø SPP devices and tie-lines Ø 60 hour threshold Ø Rate A & Rate B unchanged Ø Three iterations SPP. org 7
Unique Operational Flowgates SPP. org 8
Unique Operational Flowgates • SPP-SPS interfaces Ø Staff recommends redefining flowgate as individual OTDF flowgates due to extensive upgrades in place by 2030. SPP. org 9
Unique Operational Flowgates • GGS Stability Interface Ø Staff recommends continued use of this interface SPP. org 10
Example Flowgate Simulation Data SPP. org 11
Flowgate Example Results • Violations avoided by flowgate definition Ø Before & After Ø By Area Ø By month SPP. org 12
Effect of Adding Flowgates SPP. org 13
Flowgate Example Results • Flowgate congestion Ø Limit is respected Ø Prices change SPP. org 14
Congestion by Shadow Price Impact SPP. org 15
Next Steps • Staff to provide TWG draft results: Ø Top 10 congested flowgate summary Ø Exhaustive flowgate spreadsheet § Hours Congested & Avg. Shadow Price Ø Results of contingency scans • Requesting TWG endorsement of flowgates in August teleconference SPP. org 16
Timothy Miller Planning Engineer 501 -614 -3357 tmiller@spp. org
