meter read validation
DESCRIPTION
Meter Read Validation. 11 th August 2014. Background. The meter read validation principles were developed under ‘ The Settlement ’ BRD and formed part of Modification 0432. The new read validations and tolerances are documented in the ‘ Uniform Network Code Validation Rules ’ - PowerPoint PPT PresentationTRANSCRIPT
Meter Read Validation11th August 2014
Background
• The meter read validation principles were developed under ‘The Settlement’ BRD and formed part of Modification 0432.
• The new read validations and tolerances are documented in the ‘Uniform Network Code Validation Rules’
• Concerns have been raised that the read validation tolerances may not be appropriate, particularly for Smaller Supply Points
• British Gas delivered a presentation at the 31st January 2014 Project Nexus meeting highlighting some issues with the current proposed tolerances
• Further analysis was carried out by British Gas and by Xoserve• The following slides provides proposals for changes to the
tolerances
Summary of the Issues Identified
• The tolerances for SSPs in Class 4 will not allow for a read that produces a zero consumption to be accepted without the ‘Override Flag’
• Market Breaker Tolerances for all Classes for larger Supply Meter Points appears too high, particularly for DM Supply Meter Points
• Where the AQ has reduced over a period of time due to low consumption and the Supply Meter Point starts consuming again, the current tolerances may prevent a read from being loaded– Scenario generally applies to SSP’s that are ‘vacant’
• High consumptions due to the ‘Through the Zero’ count not being populated on the read file
Financial Values for Class 2 & 3
Daily Read Sites (Class 2 & 3) Calculated consumption compared to SOQ for each day
Large sites within Band, Standard EUC
AQ Band EUCs
Absolute Lower
limit
Lower override
limit
Upper Override
limit
Absolute Upper Limit Example AQ
Typical Load
Factor
Typical SOQ (non
WAR Band)
Min daily consumption - with override
flag kWh
Min daily consumption -
without override flag kWh
Max daily consumption -
without override flag kWh
Max daily consumption - with override
flag kWh
Daily Max Energy Value -
without flag
Daily Max Energy Value -
with override flag
Monthly Max Energy Value
0-73,200 1 0% 0% 73200 kWh 700% 70,000 30.0 639 0 - 73200 kWh 4,475 £ 1,464.00 £ 89.50 £ 2,685
73,201-732,000 2-3 0% 10% 100% 650% 700,000 27.0 7,103 0 710 7,103 46,169 £ 142.06 £ 923.38 £ 27,701
732,000-2,196,000 4 0% 10% 100% 600% 2,000,000 33.0 16,604 0 1,660 16,604 99,626 £ 332 £ 1,993 £ 59,776
2,196,000-29,300,000 5-7 0% 10% 100% 550% 29,000,000 42.0 189,172 0 18,917 189,172 1,040,444 £ 3,783 £ 20,809 £ 624,266
29,300,000-58,600,000 8 0% 10% 100% 500% 58,000,000 55.0 288,917 0 28,892 288,917 1,444,583 £ 5,778 £ 28,892 £ 866,750
>58,600,000 9 0% 10% 100% 450% 100,000,000 67.0 408,914 0 40,891 408,914 1,840,114 £ 8,178 £ 36,802 £ 1,104,068
The figures in the following slides are indicative only, based on the latest version of the UNC Related document, and use estimated values for Load Factors (to calculate SOQs) and SAP prices. It is designed to illustrate the largest values which might be expected to pass within the market breaker upper tolerance test, however actual outcomes may differ in practice.
Financial Values for Class 4
Non Daily Read Sites (Class 4) Calculated consumption compared to AQ/365 per day Large sites within Band (EUC is irrelevant)
AQ Band EUCs
Absolute Lower
limit
Lower override
limit
Upper Override
limit
Absolute Upper Limit Example AQ AQ/365
Min daily consumption - with override
flag kWh
Min daily consumption -
without override flag kWh
Max daily consumption -
without override flag kWh
Max daily consumption - with override
flag kWh
Daily Max Energy Value -
without flag
Daily Max Energy Value -
with override flag
Monthly Max Energy Value
0-73,200 1 0% 20% 300% 700% 70,000 192 0 38 575 1,342 £ 12 £ 27 £ 805
73,201-732,000 2-3 0% 20% 250% 650% 700,000 1,918 0 384 4,795 12,466 £ 96 £ 249 £ 7,480
732,000-2,196,000 4 0% 20% 200% 600% 2,000,000 5,479 0 1,096 10,959 32,877 £ 219 £ 658 £ 19,726
2,196,000-29,300,000 5-7 0% 20% 150% 550% 29,000,000 79,452 0 15,890 119,178 436,986 £ 2,384 £ 8,740 £ 262,192
29,300,000-58,600,000 8 0% 20% 100% 500% 58,000,000 158,904 0 31,781 158,904 794,521 £ 3,178 £ 15,890 £ 476,713
>58,600,000 9 0% 20% 100% 450% 100,000,000 273,973 0 54,795 273,973 1,232,877 £ 5,479 £ 24,658 £ 739,726
The figures in the following slides are indicative only, based on the latest version of the UNC Related document, and use estimated values for Load Factors (to calculate SOQs) and SAP prices. It is designed to illustrate the largest values which might be expected to pass within the market breaker upper tolerance test, however actual outcomes may differ in practice.
Xoserve Recommendations
• For all Classes and all Supply Points allow zero consumption reads to be submitted without the need of the Override Flag
• Lower the Market Breaker upper tolerances, especially for Class 2 as currently allows a daily read to be accepted that is 7 x the SOQ
• For Class 4 SSPs have a Override Read Tolerance high enough to allow reads in following period of very low or zero consumption
• Make the ‘Through the Zero’ (TTZ) count mandatory on all read files
Tolerances for Daily Reads Documented in the Settlement BRD
Lower AQ band (kWh)
Upper AQ band (kWh)
Tolerances where read will be accepted Read Accepted if
submitted with an Override Flag
‘Market Breaker’ Read Rejected
0 73,200 0 - 73,200 kWh 0 – 699% of SOQ < 0% or > 700% of SOQ
73,201 732,000 10% - 100% of SOQ0 - 9% or 101% - 649% of
SOQ< 0% or > 650% of SOQ
732,001 2,196,000 10% - 100% of SOQ0 - 9% or 101% - 599% of
SOQ< 0% or > 600% of SOQ
2,196,001 29,300,000 10% - 100% of SOQ0 - 9% or 101% - 549% of
SOQ< 0% or > 550% of SOQ
29,300,001 58,600,000 10% - 100% of SOQ0 - 9% or 101% - 499% of
SOQ< 0% or > 500% of SOQ
58,600,001 and above 10% - 100% of SOQ0 - 9% or 101% - 449% of
SOQ< 0% or > 450% of SOQ
Tolerances for a daily read received following an actual read
Proposed Tolerances for Daily Reads (Classes 1, 2 & 3)
Lower AQ band (kWh)
Upper AQ band (kWh)
Tolerances where read will be
accepted
Read Accepted if submitted with an
Override Flag
‘Market Breaker’ Read Rejected
0 73,200 0% - 130% of SOQ 131% - 299% of SOQ > 300% of SOQ
73,201 732,000 0% - 130% of SOQ 131% - 299% of SOQ > 300% of SOQ
732,001 2,196,000 0% - 130% of SOQ 131% - 249% of SOQ > 250% of SOQ
2,196,001 29,300,000 0% - 130% of SOQ 131% - 249% of SOQ > 250% of SOQ
29,300,001 58,600,000 0% - 130% of SOQ 131% - 199% of SOQ > 200% of SOQ
58,600,001 and above 0% - 130% of SOQ 131% - 199% of SOQ > 200% of SOQ
Tolerances for a daily read received following an actual read
Tolerances for Periodic Read (Class 4) Documented in the Settlement BRD
Lower AQ band (kWh)
Upper AQ band (kWh)
Tolerances where read will be accepted
Read Accepted if submitted with an Override Flag
‘Market Breaker’ Read Rejected
0 73,20010% - 300% of AQ/365 x
no. of days0 - 19% or 301% - 699% of
AQ/365 x no. of days0 – 700% of AQ/365 x no. of
days
73,201 732,00010% - 250% of AQ/365 x
no. of days0 - 19% or 251% - 649% of
AQ/365 x no. of days0 - 650% of AQ/365 x no. of
days
732,001 2,196,00010% - 200% of AQ/365 x
no. of days0 - 19% or 201% - 599% of
AQ/365 x no. of days0 - 600% of AQ/365 x no. of
days
2,196,001 29,300,00010% - 150% of AQ/365 x
no. of days0 - 19% or 151% - 549% of
AQ/365 x no. of days0 - 550% of AQ/365 x no. of
days
29,300,001 58,600,00010% - 100% of AQ/365 x
no. of days0 - 19% or 101% - 499% of
AQ/365 x no. of days0 - 500% of AQ/365 x no. of
days
58,600,001 and above10% - 100% of AQ/365 x
no. of days0 - 19% or 101% - 449% of
AQ/365 x no. of days0 - 450% of AQ/365 x no. of
days
Tolerances for a periodic read received following an actual read
Proposed Tolerances for a Periodic Read (Class 4)
Lower AQ band (kWh)
Upper AQ band (kWh)
Tolerances where read will be accepted
Read Accepted if submitted with an Override Flag
‘Market Breaker’ Read Rejected
0 73,2000% - 300% of AQ/365 x
no. of days301% - 599% of AQ/365 x no.
of days0 – 600% of AQ/365 x no. of
days
73,201 732,0000% - 250% of AQ/365 x
no. of days251% - 549% of AQ/365 x no.
of days0 - 550% of AQ/365 x no. of
days
732,001 2,196,0000% - 200% of AQ/365 x
no. of days201% - 499% of AQ/365 x no.
of days0 - 500% of AQ/365 x no. of
days
2,196,001 29,300,0000% - 150% of AQ/365 x
no. of days151% - 449% of AQ/365 x no.
of days0 - 450% of AQ/365 x no. of
days
29,300,001 58,600,0000% - 100% of AQ/365 x
no. of days101% - 399% of AQ/365 x no.
of days0 - 400% of AQ/365 x no. of
days
58,600,001 and above0% - 100% of AQ/365 x
no. of days101% - 349% of AQ/365 x no.
of days0 - 350% of AQ/365 x no. of
days
Tolerances for a periodic read received following an actual read
Next Steps
• Shippers to check the proposed tolerances on a sample of Meter Points
• At the September meeting review the tolerances and results of Shipper analysis
• Update tolerances where required• Update Settlement BRD• Update UNC Validation Rules and submit for
approval