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Table 8.4: Description of tolerances
DESCRIPTION OF TOLERANCES
Country 1. Tolerance level
2. The reason for using tolerance
3. The design of tolerance level
4. Expected timeline of using tolerances
5. How tolerances are related to the imbalance charges.
BG
1. Tolerance level: 5%
2. Reason: No access to short-term liquid gas market and to gas required to meet the short term fluctuations in gas demand and supply.
3. Design: Reflects the NU`s flexibility and the level of risk to balance inputs and off-takes
4. Expected timeline: April 2019
5. If the imbalance is within the tolerance, the charge is the administratively determined (regulated gas price) without included
small adjustment.
EL
1. Tolerance level: Currently +/−10%
2. Reason: The imbalance position of each network user is calculated as deliveries minus offtakes adjusted by a part of the allocated to
the network user daily UFG.
The tolerance limits that amount to +/−10% of the maximum entry or exit booked capacity.
3. Design: Tolerances have been introduced/designed considering the lack of NG market's liquidity as well as system's capability to cope
with daily imbalances up to a certainextent, without additional cost for the operator.
4. Expected timeline: The tolerances will be reduced within 2017 (3% acc. to DESFA's proposal) and eliminated until
April 2019 the latest.
5. In case the NU's imbalance (as a percentage of the maximum between NU's entry and exit capacity) is lower than +/−10% then the
relevant credit / debit is calculated as the product of the imbalance by the gas balancing price (administered price). In case of negative
imbalance the relevant charge may increase up to 50% for the portion ofimbalance exceeding the limit of −10%. In case of positive
imbalance the credit is reduced by 5% for the portion of the imbalance exceeding the limit of +10%.
IE
1. Tolerance level:
2. Reason: See (2015)
3. Design:
4. Expected timeline: TBC
5.
LT
1. Tolerance level: The imbalance tolerance limit is equal to the quantity of gas corresponding to 5% of the gas quantity delivered during
the balancing period by the network user in October-April and is equal to the quantity of gas corresponding to 15% of the gas quantity
delivered during the balancing period by the network user in May-September.
2. Reason: The absence of sufficient liquidity of the short term wholesale gas market.
3. Design: The imbalance tolerance limit is equal to the quantity of gas corresponding to 5% of the gas quantity delivered during the
balancing period by the network user in October-April and is equal to the quantity of gas corresponding to 15% of the gas quantity
delivered during the balancing period by the network user in May-September.
4. Expected timeline: It is expected to use tolerances until 2019.
5. The imbalance tolerance limit is equal to the quantity of gas corresponding to 5 percent of the gas quantity delivered during the
balancing period by the network user in October-April and is equal to the quantity of gas corresponding to 15 percent of the gas
quantity delivered during the balancing period by the network user in May-September.
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