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Intra-BA Pseudo Ties Errors to Market Flow Calculations

Intra-BA Pseudo Ties Errors to Market Flow Calculations. Nate Schweighart Tennessee Valley Authority 02/11/2014. Premise. Pseudo ties internal to a market can cause the forward and reverse market flow calculations to be incorrect .

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Intra-BA Pseudo Ties Errors to Market Flow Calculations

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  1. Intra-BA Pseudo TiesErrors to Market Flow Calculations Nate Schweighart Tennessee Valley Authority 02/11/2014

  2. Premise • Pseudo ties internal to a market can cause the forward and reverse market flow calculations to be incorrect. • This causes errors in the determination of relief requirements for markets in the IDC, because the IDC uses the forward flow impacts when determining relief obligations.

  3. BA LBA 1 LBA 2 G2 G1 • Market Flow = GTL Impact LBA 1 + GTL Impact LBA 2 + Transfer Impact L3 L1 L2 Flowgate

  4. Step 1: GTL Impacts BA LBA 1 LBA 2 G2 G1 500 L3 L1 L2 250 250 Flowgate

  5. Step 1: GTL Impacts BA LBA 1 LBA 2 G2 G1 500 L3 L1 L2 500 Flowgate

  6. Step 2: Transfer Impacts BA LBA 1 LBA 2 G2 G1 L3 L1 L2 500 250 250 Flowgate

  7. Step 3: Calculate GLDFs • LBA1 GTL GLDF = .15 - (.1 + .3)/2 = -.05 • LBA2 GTL GLDF = .4 - .2 = .2 • LBA2 Transfer GLDF = .4 - (.1 + .3)/2 = .2

  8. Step 4: Calculate Impact BA LBA 1 LBA 2 G2 G1 L3 L1 L2 Flowgate x =

  9. Market Flow Impact Forward Flow = 100 + 100 = 200 Reverse Flow = 25 Net Flow = 200 - 25 = 175

  10. Now Let’s Pseudo Tie the Generator in LBA 1 to LBA 2 BA LBA 1 LBA 2 G2 G1 L3 L1 L2 Flowgate

  11. Step 1/2: GTL/Transfer Impacts BA LBA 1 LBA 2 G2 G1 L3 L1 L2 Flowgate

  12. Step 3: Calculate GLDFs • LBA1 GTL GLDF = n/a. There is no gen in LBA1 now • LBA2 GTL GLDF = ((.15*500 + .4 * 1000)/1500) - .2 = .116667 • LBA2 Transfer GLDF = ((.15*500 + .4 * 1000)/1500) – (.1 + .3)/2 = = .116667

  13. Step 4: Calculate Impact BA LBA 1 LBA 2 G2 G1 L3 L1 L2 Flowgate x =

  14. Market Flow Impact Forward Flow = 58.333333 + 116.66666 = 175 Reverse Flow = 0 Net Flow = 175 – 0 = 175

  15. Summary • The intra-BA pseudo tie did not change the net market flow value but did change the forward and reverse market flow values • Therefore, internal BA pseudo ties can potentially cause the markets to misreport their forward and reverse market flows.

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