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Issued by: David T. Doot, Secretary Effective: July 1, 2000

New England Power Pool FERC Electric Rate Schedule No. 6 Original Sheet No.2045 Market Rules & Procedures Appendix 20-G Section20 - Procedure the Determination of Loads Diagrams and Specific Examples . APPENDIX 20-G DIAGRAMS AND SPECIFIC EXAMPLES POWER SYSTEM MODEL.

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Issued by: David T. Doot, Secretary Effective: July 1, 2000

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  1. New England Power Pool FERC Electric Rate Schedule No. 6 Original Sheet No.2045 Market Rules & Procedures Appendix 20-GSection20 - Procedure the Determination of Loads Diagrams and Specific Examples APPENDIX 20-G DIAGRAMS AND SPECIFIC EXAMPLES POWER SYSTEM MODEL I. Tie line, Generator, Load and Unmetered Load II. PTF Loss Determination and Allocation III. Electrical Load Calculation IV. Load Calculation V. Load Asset Contracts • Issued by: David T. Doot, Secretary Effective: July 1, 2000 • Issued on: September 11, 2000

  2. New England Power Pool FERC Electric Rate Schedule No. 6 Original Sheet No.2046 Market Rules & Procedures Appendix 20-GSection20 - Procedure the Determination of Loads Diagrams and Specific Examples I: Tie Line, Generator, Load and Unmetered Load Monitor End Monitor End Tie line #2 Tie Line #1 100 MW 50 MW NODE Receiver End Receiver End Unmetered Load Asset Load #2 100 MW Gen #1 100 MW Load #1 50 MW Unmetered Load Calculation Gen #1 100 TIE #1 100 TIE #2 -50 Load #1 -50 100 x -1 Load #2 -100 Issued by: David T. Doot, Secretary Effective: July 1, 2000 Issued on: September 11, 2000

  3. New England Power Pool FERC Electric Rate Schedule No. 6 Original Sheet No.2047 Market Rules & Procedures Appendix 20-GSection20 - Procedure the Determination of Loads Diagrams and Specific Examples II: PTF Loss Determination and Allocation NY Power Pool Tie Line #3 0 MW PTF Gen #1 105 MW Tie Line #2 52 MW Tie Line #1 LV-PTF Loss from ISO State Estimator 2 MW PTF boundry 50 MW Participant A Participant B Load #250 MW Load #150 MW Participant A Participant B L1 = - T1 L2 = -T2 - LV-PTF Loss = -50 = -52 -(-2) = -50 Total NEPOOL Demand = -(G1 +T3) = -(105 + 0) = -105 Total NEPOOL non-PTF Demand = L1 + L2 = -50 + (-50) = -100 Total PTF Loss = Total NEPOOL demand - Total non-PTF demand Participant Loss Allocation Factor = Participant non-PTF demand____ Total NEPOOL non-PTF demand Participant A PTF loss allocation = -5 * (-50/-100) = -2.5 MW Participant B PTF loss allocation = -5 * (-50/-100) = -2.5 MW GEN PTF PTF Loss 3 MW 105 MW 50 52 A B LV-PTF Loss 2 MW L1 50 L2 50 Issued by: David T. Doot, Secretary Effective: July 1, 2000 Issued on: September 11, 2000

  4. New England Power Pool FERC Electric Rate Schedule No. 6 Original Sheet No.2048 Market Rules & Procedures Appendix 20-GSection20 - Procedure the Determination of Loads Diagrams and Specific Examples III: Electrical Load Calculation Unit Receiving Negative Load Treatment Monitor End Assume: A Participant has only Load #1 and Load #2 Load #1 consists of a unit receiving Negative Load Treatment No transactions are in effect Tie Line #1 PTF Loss Allocation -1 MW 9 MW Receiver End NODE Load #2 Load #1 Unit #1 2MW Unmetered Load Asset 11 MW Electrical Load = L1 + L2 + PTF Losses Allocation = 2 + (-11) + -1 = -10 Issued by: David T. Doot, Secretary Effective: July 1, 2000 Issued on: September 11, 2000

  5. New England Power Pool FERC Electric Rate Schedule No. 6 Original Sheet No.2049 Market Rules & Procedures Appendix 20-GSection20 - Procedure the Determination of Loads Diagrams and Specific Examples IV: Load Calculation Illustration of: Unit receiving negative load treatment Dispatchable load Integrated load Assume: A Participant only has L1 L2 & L3 No transactions in effect PTF Loss Allocation 4 MW 109 MW NODE 10MW 101MW 2 MW L1 L3 Unmetered load That includes 3 MW of station service load and 2 MW of Type 2 Interruptible Load Dispatchable load (type 3 or type 4) L2 Unit receiving “Negative load treatment” Load = L1 + L2 + L3 + PTF Dispatchable Excluded Exclude 3MW station service 4MW load excluded Exclude 2MW Type 2 interruptible Load Load = 0 + 0 + -101 + (-4) -(-3) -(-2) = + 0 + -96 + (-4) = 100 Issued by: David T. Doot, Secretary Effective: July 1, 2000 Issued on: September 11, 2000

  6. New England Power Pool FERC Electric Rate Schedule No. 6 Original Sheet No.2050 Market Rules & Procedures Appendix 20-GSection20 - Procedure the Determination of Loads Diagrams and Specific Examples V: Load Asset Contract Transaction Assume: Participant A has a 50% registered entitlement to Load #1. This is the only load Participant A has. No dispatchable, Interruptible or Station Service loads. No transactions in effect. PTF Loss Allocation 2 MW Tie line #1 100 MW NODE Load #1 196 MW Gen #1 96 MW With no load asset contracts Electrical load = L1 x 50% + PTF Loss Load = L1 x 50% + PTF Loss = 196 x .5 + 2 = 196 x .5 + 2 = 98 + 2 = 98 + 2 = 100 =100 Assume Participant A enters into a Load Asset Contract for Electrical Load and sells a 25% Load Asset entitlement to another other Participant. Assume Participant A also enters into a Load Asset Contract for ICAP with another Participant to purchase an additional 25% entitlement to load #1. Electrical load = L1 x .5 - L1 x .25 + PTF loss allocation = -196 x .5 - (-196 x .25) + -2 = -98 + 49 -2 = -51 MW Load = L1 x .5 + L1 x .25 + PTF loss allocation = -196 x .5 + (-196 x .25) + -2 = 149 MW Issued by: David T. Doot, Secretary Effective: July 1, 2000 Issued on: September 11, 2000

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