1 / 9

CSC/CRE Technical Review

CSC/CRE Technical Review. 6 October 2008. Outline. Review the process used in calculating Power Transfer Distribution Factors (PTDFs). Information posted at: http://www.ercot.com/calendar/2008/10/20081008-TACWMS CRE recommendations distributed on October 3 rd. PTDF vs. GSF.

teenie
Download Presentation

CSC/CRE Technical Review

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CSC/CRE Technical Review 6 October 2008

  2. Outline • Review the process used in calculating Power Transfer Distribution Factors (PTDFs). • Information posted at: http://www.ercot.com/calendar/2008/10/20081008-TACWMS • CRE recommendations distributed on October 3rd.

  3. PTDF vs. GSF • Power Transfer Distribution Factors (PTDFs) represent the percent of power transfer that flows on a transmission facility. PTDFs are used to estimate the change in flows that occur from a particular transfer and identifying which elements are impacted by the transfer. • Generator Shift Factors (GSFs) represent the change in flow on an element as a result of increasing generation at a node. GSFs are more useful in identifying the generator pairs that can impact a specific element. • Both PTDF and GSFs can be calculated using similar assumptions. • Source: http://www.pserc.org/cgi-pserc/getbig/publicatio/2001public/tcc_tutorialjuly01.pdf

  4. PTDF process For each of the CSC Scenarios 3b, 3i, and 3h - • ERCOT coordinated Market Participant resources to assist in the calculation of PTDFs for each scenario • PowerWorld and Excel were used as the tools to calculate PTDFs for base case and contingencies of CSCs and CREs. • For the Base Case and each pair of contingency-monitored elements, the 3 plants with highest of GSFs for both directions were identified to review whether local solutions were feasible.

  5. PTDF Calculation Assumptions • Oklaunion movable and located in the West zone under Scenario 3i and 3b but not movable and located in the North zone under Scenario 3h. • Pmax available to resolve constraint for all unit movable units in each zone

  6. ERCOT’s CRE recommendations • ERCOT based it’s CRE recommendations on the results generated by the test outlined in Protocols Section 7.2.3 • ERCOT is also permitted by the Protocols to select CREs that can provide improved operational control. • In determining whether a CRE provides improved operational control ERCOT reviewed the PTDF results and the location of the CRE.

  7. Who’s on first? 2 3 • This column states whether the CRE was a 2008 CRE. • Explains the criteria used for recommending the line as a CRE; if a CRE only passed for a specific scenario, the scenario is provided in parenthesis. • Denotes which CSC scenario a particular CRE is recommended for; “x” marks the spot. 1

  8. Average Weighted Shift Factor

  9. Questions ???

More Related