unc modification proposal 0116 reform of the nts offtake arrangements
DESCRIPTION
UNC Modification Proposal 0116 Reform of the NTS Offtake Arrangements. Transmission Workstream 5 th October 2006. Bi-Directional Sites – Current arrangements. End of day exit Daily Quantities (DQ) and User allocations (UDQOs) provided to National Grid NTS e.g. - PowerPoint PPT PresentationTRANSCRIPT
UNC Modification Proposal 0116Reform of the NTS Offtake Arrangements
Transmission Workstream
5th October 2006
Bi-Directional Sites – Current arrangements
End of day exit Daily Quantities (DQ) and User allocations (UDQOs) provided to National Grid NTS e.g.
Exit DQ = 10, UDQO User A = 2, UDQO User B= 8
Same process undertaken for end of day entry quantities
End of Day Net Physical measurement provided
National Grid NTS check difference between Exit and Entry measurements equals end of day net physical measurement
Bi-Directional Sites – Proposed Enduring Arrangements
Existing end of day processes continues for entry and exit
Step 1. Flex Overruns only calculated if cumulative net exit physical flow over first 16 hours
Step 2. Cumulate flow over 06:00 to 22:00 Exit Daily Quantity (DQ22:00) and User allocations (UDDQ22:00) provided to National Grid NTS e.g.
Exit DQ22:00 = 6, UDDQ22:00 User A = 1, UDDQ22:00 User B = 5 DQ22:00 must be no less than the cumulative net exit physical flow at 22:00
Step 3. User exit allocations (UDQO and UDDQ22:00) utilised in Flex Overrun calculation
Negative Flex Flow Example 1
22.0006.00
End of Day
Measurement
= 7200
300
User has 0 Flexibility holding and -160
Flexibility Utilisation.
Overrun = -160 – 0 = -160 = NO Flexibility
Overrun
User has 0 Flex Holding, if they wish to
Flow an “anti-diurnal” profile no
Requirement to purchase Flexibility
290
Negative Flex Flow Example 1
22.0006.00
End of Day
Measurement
= 7200
300
User must flow less than or equal to 4640
at 22.00 to ensure that no Flexibility
Overrun is incurred
Users Flexibility Holding = -160
Users Flex utilised = 4640 – 4800 = -160
-160—160 = 0 NO Flexibility Overrun
User Trades or sells back to NTS 160 units
290
Pressure Commitments – Transitional Arrangements (Mod 046)
Assured Offtake Pressures rolled over from interim to transitional regime
based on 2005 Offtake Capacity Statement remain at this level until Sept 2010 unless amended as a result of a
request
DNOs able to request pressure increase by end of July in conjunction with their capacity requests
National Grid NTS accept/reject pressures and capacity requests by end of September as part of Offtake Capacity Statement
Pressure Commitments - Proposed Enduring Arrangements (Mod 0116)
Assured Offtake Pressures rolled over from transitional to enduring regime
based on Sept 2006 Offtake Capacity Statement remain at this level unless amended as a result of a request
DNOs able to request (permanent) pressure increase by end of July in conjunction with their capacity requests, but capacity requests via annual flex auctions
National Grid NTS accept/reject pressure increase by end of September as part of Offtake Pressure Statement
Pressure Commitments - Proposed Enduring Arrangements (Mod 0116)
National Grid NTS ability to request (permanent) pressure decreases
requests by end of April DNO accept/reject by end of July
Ability for National Grid NTS and DNOs to request temporary decreases for a day or days
Accept/reject within 10 days
Common test for acceptance/rejection of any pressure request, based on current arrangements
Safe and efficient operation of Transporter’s network Obligation to co-operate
New Connections – Current Arrangements Developer discusses with National Grid NTS its connection
requirements through “connection process”
States anticipated capacity requirements National Grid NTS considers whether requires investment If so, may seek to agree terms of ARCA and delivery date ARCA required to be agreed to allow sufficient investment lead rime
Where ARCA agreed, Shippers able to book prevailing rights from relevant month consistent with delivery date through SPA process
Shippers not able to request additional capacity beyond 6 months under UNC via SPA process, irrelevant of whether triggers investment
New Connections – Proposed Enduring Arrangements Developer discusses with National Grid NTS its connection requirements
through “connection process” Obtain relevant NTS Exit Zone and NTS Exit Area (as defined in ExCR Methodology
Statement)
States anticipated capacity requirements National Grid NTS considers whether requires investment If so, may seek to agree terms of ARCA and delivery date ARCA required to be agreed to allow sufficient investment lead rime Investment lead times will be consistent with obligations agreed as part of the TPCR
Where ARCA agreed, Shippers able to book for agreed non-Gas Year start dates, daily rights through daily auctions prevailing annual rights from relevant Gas Year – nominated Shippers deemed to
have booked capacity under UNC at relevant Application Window
Also, any User able to request additional flat capacity at Annual Application Window for unconstrained period for use from start of a Gas Year
New Connections – Proposed Enduring Arrangements
Initialisation rules rollover capacity bookings from Transitional to Enduring Arrangements
DNOs based on Sept 2006 Offtake Capacity Statement Shippers based on Gas Year 2005/06 bookings
Require to clarify in rules that same will apply to any agreed Reserved Capacity through ARCAs
only those under current negotiation and where agreed by implementation of the proposal
NTS/LDZ Operational Flows – Proposed Enduring Arrangements
Reciprocal arrangements provided to DNOs for flow swapping i.e.
DNO’s able to request flow swaps from National Grid NTS in accordance with same rules as under UNC OAD I2.4 for National Grid NTS to request flow swaps from DNOs
Exit Capacity Release Methodology Statement – User Commitment
User Commitment
Option 1. Commitment Based on Prevailing Prices
National Grid will accept User applications, subject to
appropriate credit checks, made at Annual Application Window in Gas Year Y to increase Prevailing NTS Exit (Flat) Capacity to amount “Q” on basis that
User will pay relevant NTS Exit Capacity charges for amount Q for each Gas Day over the period Gas Year Y+4 to Y+7 (inclusive)
NTS Exit Capacity charges as published in Transportation
Statement for relevant Gas Days
User Commitment
Option 2. Commitment Based on Prices at time of application
National Grid will accept User applications, subject to appropriate credit checks, made at Annual Application Window in Gas Year Y to increase its Prevailing NTS Exit (Flat) Capacity to an amount “Q” on the basis that the User will:
pay to National Grid at least the User Commitment Amount; and/or hold the amount Q for each Gas Day over the period Gas Year Y+4 to Y+7
(inclusive)
User Commitment Amount will be determined as follows:
User Commitment = P x Q x F x 365, where
P = relevant prevailing NTS Exit Capacity charge at the time of application (p/kWh) Q = total amount of Prevailing NTS Exit (Flat) Capacity held by the User (kWh) F = factor of 4