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Demand Resource Operable Capacity Analysis – Assumptions for FCA 5
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Assumptions The analysis uses assumptions based upon –Purchasing the required amount of Installed Capacity Requirement (ICR) for the System Wide study –A set of Transmission Security Analysis values developed by System Planning for the Load Zone studies 2
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Total Resources New England Analysis –1. Total Capacity: The capacity value is the Representative Future Net ICR of 32,672 MW for 2014/15 calculated for use in the 2010 Regional System Plan and other planning studies Load Zone Analysis –1. Minimum Capacity Requirement from TSA: This capacity value is the minimum amount of resources that are necessary according to a Transmission Security Analysis (TSA) performed for each Load Zone Maine Load Zone uses the Maximum Capacity Limits 3
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Total Resources (cont.) Load Zone Generation –Amount of generation that is accounted for in each load zone for the purpose of the DR Op Cap analysis Maximum adequacy requirement: Maximum Capacity Limit (MCL) –This value was used for Maine in the analysis due to export constraints Minimum generation requirement from TSA –Amount of generation that is required in an area in order to secure the system for N-1-1 conditions –Was determined for each zone based on a TSA and consistently with PP-10 criteria The Load Zone results do not represent a simultaneous feasibility between load zones. Each Load Zone analysis is completed independently of the other 4
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Import Capacity New England Analysis –2. Net of Non-ICAP Purchases & Sales: value assumed is the average of the 2007-2009 ICAP Transaction Summary monthly average for HQ Phase I/II used as a proxy for import capacity. The monthly average is assumed for all hours 2010 data was not used to compute the average since the ending of the ICAP transition period would have significantly biased the data Load Zone Analysis –2. Import Capability (N-1) (See Next Slide) All values are rounded to the nearest 50 MW 5
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Import Capability (cont.) Import Capability for Load Zone Analysis –For zones that closely reflect electric boundaries defined in the Regional System Plan (RSP), RSP import limits were used Connecticut and Northeast Massachusetts –For zones that do not closely reflect electric boundaries defined in the RSP, import limits were determined for the purpose of the DR Op Cap analysis only Maine, New-Hampshire, Vermont, Rhode-Island, Southeast Massachusetts and Western and Central Massachusetts These import limits were strictly based on thermal, N-1 constraints –All elements at 115kV and above were monitored –All single-element contingencies and multiple-element contingencies as described in OP-19 Section II.A.2 were considered These import limits were determined using SIEMENS/PTI/MUST –MW from remote generation outside the zone were transferred to all generation inside the zone Resulted in one standard number for each zone –No detailed sensitivities were performed to assess the range of all potential import limits –Studies represent all lines in conditions 6
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Demand Resources New England & Load Zone Analyses –3. Total Demand Resources: Three scenarios are used: Low DR, Intermediate DR and High DR clearing and are developed as Low – 100% of Existing DR capacity which qualified for FCA 4 (2013/14 CCP) Intermediate – Low DR scenario plus 50% of the New DR capacity which qualified for FCA 4 (2013/2014) High – Low DR scenario plus 100% of the New DR capacity which qualified for FCA 4 (2013/2014) –The Total Demand Resources are the Cleared/Qualified capacity values without the Reserve Margin Gross-up which is the Demand Reduction Value * Transmission & Distribution Gross-up (8%) –Real-Time Emergency Generator DR are limited to the 600 MW amount that will be purchased to meet the ICR and Load Zones are prorated to sum to the New England value 7
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Total Demand Resources Scenarios - Demand Reduction Value (MW) 8
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Total Capacity Without Demand Resources New England Analysis –4. Total Capacity Without Demand Resources : Total Capacity + Net of Non-ICAP Purchases & Sales – Total Demand Resources [1+2-3] Load Zone Analysis –4. Total Capacity Without Demand Resources : Minimum Capacity Requirement from TSA (or MCL for ME) + Import Capability (N-1) – Total Demand Resources [1+2-3] 9
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. 10 Assumed Generation Maintenance & Assumed Unplanned Outages New England Analysis –5. Assumed Generation Maintenance: monthly average of the weekly values from the 2007 - 2010 Annual Maintenance Schedules (AMS) –6. Assumed Unplanned Generation Outages: monthly average of the weekly Allowance for Unplanned Outages from the 2007 - 2010 AMS Operable Capacity Analysis Load Zone Analysis –5. Assumed Generation Maintenance: prorated New England value based on the Capacity Requirement from TSA (or ME MCL)/New England Qualified Capacity –6. Assumed Unplanned Generation Outages : prorated New England value based on Capacity Requirement from TSA (or ME MCL)/New England Qualified Capacity
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Hourly Forecasted 50-50 Peak Load New England & Load Zone Analyses –8. Forecasted 50-50 Peak Load: (Monthly peak shown in table) –The summer & winter peak loads are from the 2010 CELT 50-50 Forecast for 2014/2015 –An hourly profile is produced based on the 2002 load shapes for New England and for each of the Load Zones –2002 was chosen because the summer period had several days in the range of the summer peak (represents typical summer weather) –Resulting 2014/15 monthly peaks may be different than the 2010 CELT forecast of monthly peaks because they were developed using the 2002 load shape 11
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. 12 New England & Load Zone Analysis –7. Gen Resources Available to Meet Load & OR = Total Capacity Without Demand Resources – Assumed Generation Maintenance – Assumed Unplanned Generation Outages [4-5-6] Generating Resources Available to Meet Load & OR
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Hourly Forecasted 90-10 Peak Load for August 2012 New England & Load Zone Analyses –8. Forecasted 90-10 Peak Load: (Monthly peak shown in table) –The summer 2010 CELT 90-10 Load Forecast for August 2014 was used to create an hourly load profile and a 90-10 Operable Capacity analysis was performed with all other assumptions remaining the same 13
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Operating Reserve Requirement New England Analysis –9. Operating Reserve Requirement: assumed to be 1 times the largest contingency and ½ times the second largest contingency. The value is assumed to be 2000 MW for this analysis Load Zone Analysis –9. Operating Reserve Requirement: assumed to be the largest contingency in the Load Zone Consistent with the Transmission Security Analysis assumptions 14
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Passive Resources New England & Load Zone Analyses –10. Passive Demand Resources: These energy efficiency type of resources are assumed as already in-service and therefore subtracted from the Load Forecast for each hour –A monthly ratio was developed by the ISO Demand Resource group which assumes a lower reduction value for Passive Resources in shoulder months –Equals DRV of Passive DR * T&D Gross-up –11. Peak Load & OR – Passive DR: = Forecasted Peak Load + Operating Reserves – Passive DR [8+9-10] 15
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Surplus/Deficiency Before Calling Active DR New England & Load Zone Analyses –12. Surplus/Deficiency Before Calling DR: assumed to be the amount of MW need before calling Active DR and/or OP 4 (if needed) –Calculated from Gen Resources Available to Meet Load & OR (Line 7) – [Peak Load + OR – Passive Resources] (Line 11) –Negative value shows need for Active Demand Resources 16
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Description of DR Op Cap Results All MW of DR is the DRV with the 8% T&D Gross-up 13. Maximum MW of Non-RTEG Active DR Available: MW of Real-Time DR available for each scenario 14. Maximum MW of Non-RTEG Active DR Needed: MW of Real-Time DR that would be called in any month with a need for DR as show in line 12 15. Maximum MW of RTEG Active DR Available: MW of RTEG available for each scenario 16. Maximum MW of RTEG Active DR Needed: MW of RTEG that would be required once the entire supply of non-RTEG is called in any hour with a need for DR as show in line 12 (not limited to 600 MW) 17. Additional MW of OP 4: remaining deficiency, if any, once all Active DR have been called 18. Average MW Amount of DR Need: monthly average of any hours when DR is needed 17
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Description of DR Op Cap Results (cont.) 19. # of Hours Load + OR – Passive DR above Available Resources: Sum of the number of hours each month when at least 1 MW of DR would be needed 20. Corresponding # of Days: Sum of the days for each month when at least 1 hour of DR is needed 21. Maximum # of Consecutive Days: Maximum number of consecutive days when DR would be needed per month 18
2014/15 Demand Resource Operable Capacity Analysis © 2010 ISO New England Inc. Description of DR Op Cap Results (cont.) 22. Number of Calls per MW of Non-RTEG Active DR: Calculated as the peak of each day’s DR need divided by the total MW of non- RTEG Active DR. For example, if there is 1000 MW of DR need and 500 MW of available non-RTEG Active DR, then on that day, the non-RTEG Active DR would be called 1.0 times 23. Number of Calls per MW of RTEG: Once all MW of non-RTEG Active DR is called, if there is still any remaining need, this value is calculated as the peak hour of remaining need divided by the total MW of RTEG 19
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