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SAMPEI User Interface Modifications - Withdrawal Phase

This presentation explains the main modifications to the SAMPEI user interface for the withdrawal phase, effective from November 1st, 2013. It includes information on operational planning allocation, gas stock allocation, nomination programs, and withdrawal capacity calculation.

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SAMPEI User Interface Modifications - Withdrawal Phase

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  1. SAMPEI user interface Modifications in force from 1st november 2013 on –Withdrawal Phase

  2. Introduction The following slides explain the main modifications to the SAMPEI user interface for the withdrawal phase in force from 1st november 2013 on, carried out accordingly to Aeeg resolutions 75,92 e 353 of 2013. Withdrawalcapacitycut Resolutions and publications Operational Planning Allocation • Volumes of PB Gas • Possibility to allocate the sold/bought gas on each stock • Report capacità disponibili • Report of available capacities • Form for gas stock allocation rule at 31° october 2013 • Possibility, for each storage service and related storage stock, to make seasonal, monthly and daily nomination program • Possibility to nominate/re-nominate for each storage service and related storage stock • Possibility to select the flow direction (injection/withdrawal) • Visualization of nomination cycles • Resolution 353/2013/R/GAS of 1st August 2013 • Publications of the modifications done for the calculation of the withdrawal capacity • Examples of withdrawal capacity calculation for the peak and uniform services • Informations of withdrawal capacity cut GESCON 2

  3. NOMINATION PLANNING OCTOBER/NOVEMBER 24th october 2013 1st november 2013 14th november 2013 31st october 2013 10th november 2013 15th october 2013 Seasonal planning disabled Nomination of gas day 1° november; capacity allocated on the different stocks Mandatory - Dead-line for seasonal planning execution Weekly planning execution from 28th to 31° october 2013 • Renomination of gas day 1° november; capacities allocated on the different stocks • Seasonal planning execution Start of weekly nomination planning GESCON 3

  4. SEASONAL/MONTHLY/WEEKLY PROGRAM Each User will split the nomination program on each stock GESCON 4

  5. DAILY NOMINATION FOR DAY G Nomination Cycle C1 indicates nomination cycle at 13.00 C2 indicates nominatin cycle at 19.00 Select gas day of interest or from day a to day e Click on «Cerca» data window appears Choose the flow direction ticking the check box Insert the nomination values under the different stocks and click on «Salva» GESCON 5

  6. RENOMINATION FOR DAY G Select the gas day of interest Click on ˝Cerca˝ Data window appears Choose the flow direction ticking on the check box Insert the nomination values» under the different stocks and click on «Salva GESCON 6

  7. BALANCING PLATFORM (PB) MANAGEMENT Totale da ripartire The values shown in column «Limite inseribile» in the injection phase indicate the residual free space in stock In case the user will not insert any value, the allocation in the different stocks will be done accordingly to the storage code rules GESCON 7

  8. BALANCING PLATFORM (PB) MANAGEMENT Totale da ripartire The values shown in column «Limite inseribile» in the withdrawal phase indicate the residual gas in stock In case the user will not insert any value, the allocation in the different stocks will be done accordingly to the storage code rules GESCON 8

  9. REPORT AVAILABLE CAPACITIES In this window the capacities of each stock are shown GESCON 9

  10. COMMUNICATION OF STOCK ALLOCATION(only for injection 2013) The following communication will be published on the Stogit web site and shall be downloaded and filled in by each User who must indicate the allocation, in percentage terms, of the gas stock into the different services. The form must be sent within 31° October 2013 only by e-mail in pdf format to stogit-servizioclienti@stogit.it . To be noticed that the infringment of the time deadline mentioned above will entitle Stogit to allocate the stock into the different service stocks accordingly with the priority order established by the Storage Code paragraph 6.3 up to the complete filling-in of the available space. GESCON 10

  11. RESOLUTION 353 – 1st AUGUST 2013Provisions related to the storage service http://www.autorita.energia.it/allegati/docs/13/357-13.pdf The Authority for Electricity and Gas (AEEG) on 1st August 2013 has established that Stogit, from 1st November 2013, must update weekly the maximum withdrawal volumes for the following week. Userswhohavewithdrawnless volume than the optimal volume, will be allocated part of the withdrawalcapacity made available by Stogit on its website. Thiscapacity of the systemwill be, within the system’s constraints, the maximum withdrawal capacity available. GESCON 11

  12. RESOLUTION 353 – 1st AUGUST 2013Calculation of the maximum weeklywithdrawal volumes Month of November: monthly withdrawal volumes 600 MSmc = 23.580.000 Gj Maximum weekly withdrawal volumes= 5.895.000 Gj Optimal withdrawal volume The additional withdrawal capacity is allocated to users proportionally to the difference, if positive, between their real gas stock and the optimal gas stock they should have on the basis of contractually defined performances. Real withdrawal volume In this example the weekly available volume hasn’t been totally withdrawn (5.895.000). The additional withdrawal capacity made available on the following week (600.000) is not equal to the residual of the previous week (895.000) because of system’s constraints. GESCON 12

  13. WITHDRAWAL PHASE PUBLICATIONS http://www.stogit.it/repository/business_servizi/Comunicazioni_operative/Profili_utilizzo_fattori_adeguamento/Profili_utiliz_2013_2014/Explains_about_withdrawal_phase.pdf http://www.stogit.it/repository/business_servizi/Comunicazioni_operative/Profili_utilizzo_fattori_adeguamento/Profili_utiliz_2013_2014/Storage_MODULAZIONE.pdf GESCON 13

  14. Calculation of Flat Service’s withdrawal capacityStock filling 100% Contractual Space = 150.000 Gj ContractualwithdrawalcapacityCEcontr = (Space/150) = 150.000 / 150 = 1.000 Gj On 1/11/2013 the adjustmentfactor (FA) isequal to 1 (Gas stock / allocatedspace) FA = 150.000/150.000 = 1 CE available= CEcontr* FA = 1.000 * 1 = 1.000 Gj Monthlywithdrawal volume = CE available* days (November) = 1.000 * 30 = 30.000 Gj Gas Stock i = Gas Stock i-1 – Novemberwithdrawal volume = 150.000 – 30.000 = 120.000 Gj Optimal withdrawal volume GESCON 14

  15. Calculation of Flat Service’s withdrawal capacityStock filling 80% Contractual Space = 150.000 Gj ContractualwithdrawalcapacityCEcontr = (Space/150) = 150.000 / 150 = 1.000 Gj On 1/11/2013 the adjustmentfactor (FA) isequal to (Gas stock / allocatedspace) FA = 120.000/150.000 = 0,8 CE available= CEcontr* FA = 1.000 * 0,8 = 800 Gj Monthlywithdrawal volume = CE available* days (November) = 800 * 30 = 24.000 Gj Gas Stock i = Gas Stock i-1 – Novemberwithdrawal volume = 120.000 – 24.000 = 96.000 Gj Optimal withdrawal volume Real withdrawal volume To calculate the withdrawal capacity from the month of December on it’s necessary to take into account the contractual gas stock data: FA = Gi / Gcontr,i Gi = real gas stock at the first gas day of month i Gcontr,i = contractual gas stock at the first gas day of month i GESCON 15

  16. Calculation of Flat Service’s withdrawal capacity Example 1: withdrawal volume increase and resulting FA decrement EXAMPLE: Optimalwithdrawal volume Example 2: withdrawal volume decrement and resulting FA increase Example 3: nullwithdrawal volume and resulting FA increase GESCON 16

  17. Calculation of Peak Service’s withdrawal capacityStock filling 100% Contractual Space = 150.000 Gj Minimum Contractualwithdrawalcapacity (Space/150) = 150.000 / 150 = 1.000 Gj Additional Contractual withdrawal capacity (Space/577) = 150.000 / 577 = 260 Gj On 1/11/2013 the adjustmentfactor (FA) isequal to 1 (Gas stock / allocatedspace) FA = 150.000/150.000 = 1 CE available= (CEmin+ CEadd ) * FA * multiplictivecoeff. = 1.260 * 1 * 0,38 = 479 Gj Novemberwithdrawal volume = CE available* days (November) = 479 * 30 = 14.364 Gj Gas Stock i = Gas Stock i-1 – Novemberwithdrawal volume = 150.000 – 14.364 = 135.636 Gj Optimalwithdrawal volume * the moltiplicative coefficientis subject to revision during the thermal year in the face of changes in base assumptions GESCON 17

  18. Calculation of Peak Service’s withdrawal capacityStock filling 80% Contractual Space = 150.000 Gj Minimum Contractualwithdrawalcapacity (Space/150) = 150.000 / 150 = 1.000 Gj Additional Contractual withdrawal capacity (Space/577) = 150.000 / 577 = 260 Gj On 1/11/2013 the adjustmentfactor (FA) isequal to (Gas stock / allocatedspace) FA = 120.000/150.000 = 0,8 CE available= (CEmin+ CEadd ) * FA * multiplictivecoeff. = 1.260 * 0,8 * 0,38 = 383 Gj Novemberwithdrawal volume = CE available* days (November) = 383 * 30 = 11.490 Gj Gas Stock i = Gas Stock i-1 – Novemberwithdrawal volume = 120.000 – 11.490 = 108.510 Gj Real withdrawal volume Optimalwithdrawal volume * the multiplicative coefficient is subject to revision during the thermal year in the face of changes in base assumptions GESCON 18

  19. Calculation of Flat Service’s withdrawal capacity Example 1: withdrawal volume increase and resulting FA decrement Optimalwithdrawal volume Example 2: withdrawal volume decrement and resulting FA increase Example 3: nullwithdrawal volume and resulting FA increase GESCON 19

  20. WITHDRAWAL CAPACITY CUT CAPACITY CUT: • When the sum of nominations exceeds the total available capacity of all users THE FOLLOWING ELEMENTS ARE TAKEN INTO ACCOUNT FOR THE CUT: • The differencebetweenavailablecapacity and nomination per each service • The volume withdrawn by eachuser (thosewho have an higher % withdrawn will have an higher cut) • Ratio between volume withdrawn per each user and total volume withdrawn of all cutted users • The distribution will be done accordingly to the priority of stocks as indicated in the Storage Code (§ 6.3.7) GESCON 20

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