Linepack Flexibility Service
The LFS service aims to provide an incentive for shippers to be in balance at the end of the day. The service uses the flexibility of the pipeline buffer at the end of the gas day. This is represented by the dark green zone at GTS. If, at the end of the day, the SBS is in the dark green zone, GTS has sufficient pipeline buffer available and the shippers who are not in balance will automatically make use of the new LFS service. Through this service, shippers will pay for the use of the network buffer at the end of the gas day.
How does the LFS work?
The basic principle is that the SBS is in the dark green zone at the end of the gas day. Shippers who have an imbalance at the end of the day, hence a POS other than 0, will use the network buffer. These shippers will either have a shortage or a surplus of gas, which will be absorbed by the network’s buffer function. The use of the buffer function is called the LFS and is subject to a tariff.
Booking or nomination is not required. GTS applies the POS at 06:00 hours (LET) and calls that the use of the LFS. For 2017, the LFS tariff is 0.4% of the neutral gas price. The percentage can be adjusted on the basis of an evaluation. The shipper’s POS remains, in other words no gas is exchanged between shippers and GTS.
Example: an 06:00 hours POS of 1,000 MWh short will cost the shipper 1000 MWh x 0.4% x neutral gas price €/MWh.
Invoicing will take place after the end of each month. A new screen is generated in Gasport with a transparent overview of the usage and costs for shippers.