Mod 270 Potential Options

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Mod 270 Potential Options

• Rob Hill
• 15/02/2009

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Six potential options following discussion at
last months Development Workgroup
Option Name Description
1 Elective DM for SSPs Use daily elective regime (Mod 224) to move a SSP with automated meter reading capability into a daily read submission regime.
2 Aggregate logical meter number (CSEP) Aggregate SSPs with automated meter reading capability behind a single logical meter per LDZ using existing CSEP functionality. Shipper would then submit a single monthly aggregate read by logical meter for daily energy allocation. AQ and read submission process for individual SSPs to be continued as current.
3 Aggregate large supply point Aggregate SSPs with automated meter reading capability as a single large supply point. Shipper would then submit a single monthly read for the LSP for energy allocation.
4 Smart EUC (Rolling AQ) Build on mod 209 to allow monthly read submission to adjust AQs on a rolling basis.
5 AQ Appeals for SSPs Open up the LSP AQ appeal process to SSPs, use regular read submission (mod 202) to allow more frequent appeal.
6 LSP Elective Allow shippers to elect SSPs with automated meter reading capability as LSPs with a monthly read cycle.
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Option 1 Elective DM for SSPs

• Description
• Use daily elective regime (Mod 224) to move a SSP
  with automated meter reading capability into a
  daily read submission regime.
• Strengths
• Uses existing systems capability
• Weaknesses
• Cost prohibitive for SSPs (c800/year)
• Would require daily nomination of gas
• Resource intensive for shippers and Xoserve
• Systems constrained to a maximum number of sites
  25,000
• Issues
• This is not a practical solution and has already
  been discounted in the modification proposal

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Option 2 Aggregate logical meter number (CSEP)

• Description
• Aggregate SSPs with automated meter reading
  capability behind a single logical meter per LDZ
  using existing CSEP functionality. Shipper would
  then submit a single monthly aggregate read by
  logical meter for daily energy allocation. AQ and
  read submission process for individual SSPs to be
  continued as current.
• Strengths
• Uses existing logical meter capability
• Available to all shippers with SSPs with
  automated meter reading capability
• Weaknesses
• Some systematic changes required to enable
  aggregation, de-aggregation and continued SSP AQ
  review process.
• Issues
• Who is best placed to aggregate and how are
  aggregated reads kept in sync with SSP reads?
• How would the COS process work for aggregation
  and de-aggregation?

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Option 3 Aggregate large supply point

• Description
• Aggregate SSPs with automated meter reading
  capability as a single large supply point.
  Shipper would then submit a single monthly read
  for the LSP for energy allocation.
• Strengths
• Uses existing aggregation and de-aggregation
  meter capability
• Available to all shippers with SSPs with
  automated meter reading capability
• Weaknesses
• Complex aggregation and de-aggregation process.
• Breaks linked by purpose rules for aggregation
• Issues
• How would the COS process work for aggregation
  and de-aggregation?

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Option 4 Smart EUC (Rolling AQ)

• Description
• Build on mod 209 to allow monthly read submission
  to adjust AQs on a rolling basis.
• Strengths
• Changes required are well defined
• Weaknesses
• Long lead time for implementation
• Uncertainty over regulatory support
• Issues

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Option 5 AQ Appeals for SSPs

• Description
• Open up the LSP AQ appeal process to SSPs, use
  regular read submission (mod 202) to allow more
  frequent appeal.
• Strengths
• Uses a well defined and existing process
• Weaknesses
• Semi manual processes therefore resource
  intensive.
• AQ dead band may preclude AQ adjustment for SSPs
• Issues

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Option 6 LSP Elective

• Description
• Allow shippers to elect SSPs with automated meter
  reading capability as LSPs with a monthly read
  cycle.
• Strengths
• Uses a well defined and existing process
• Open to all shippers
• Weaknesses
• Potential maximum volume cap due to system
  constraints
• Issues
• Shipper loss process would need to de-elect from
  LSP to SSP