Subsequently, it is different companies that owns and administer the physical instalations, transport the gas and trade the energy up to the point where the energy is made available for the consumers.

There are three parties that have the roles of owners of the physical infrastructure:

1. Energinet.dk is the gas transmission company in Denmark that owns and operates the natural gas transmission system – the motorways of the gas grid. Energinet.dk offers transmission, emergency supply and balancing services. We also facilitate the development of the gas market.
   
   We are also responsible for a register of players where information on all companies in the gas sector is registered and updated on a current basis. In order to be included in the register of players, shippers must enter into a framework agreement, gas suppliers must enter into a gas supply agreement, and storage customers must enter into a storage customer agreement. You can read more about how to become a player on the gas market here.
   
   Finally, we are responsible for volume balancing in the Danish natural gas system and for gas supply in national emergency situations.
   
   
2. Dong Gas Distribution, HMN Naturgas, Naturgas Fyn Distribution and Aalborg Kommune, Gasforsyningen are distribution companies. They own and operate the distribution system - the highways of the gas grid - in each of the six distribution areas. The distribution companies charge a fee for use of the distribution systems, energy fees and taxes.
   
   
3. Two storage companies in Denmark ie DONG Storage owns and operates the gas storage facility at Stenlille on Sealand and Energinet.dk owns the gas storage facility at Lille Torup in Northern Jutland. Access to the storage facilities is obtained separately from each of the storage companies. A standard storage agreement between the storage company and the storage customer stipulates the relationship between maximum volume stored and maximum injection and withdrawal capacities. Storage capacity is bought with or without filling requirements. Further information can be obtained from DONG Storage or Energinet.dk Storage.

Please consult the public part of the Register of Players for contact information to the system operators.

There are three parties that have the roles of commercial users of the physical infrastructure:

1. Shippers are commercial players who undertake wholesale transport of natural gas in the transmission system. Shippers buy transport rights in the transmission system from Energinet.dk with a view to supplying the gas to one or more gas suppliers in the distribution systems. In some cases, the same player is both shipper and gas supplier. Shippers have natural gas delivered into the transmission system from Danish or international producers or shippers in neighbouring systems. Shippers are responsible for balancing the volumes they supply into the Danish transmission system (from the North Sea, Germany or from a storage facility) and the volumes they resupply out of the transmission system (to the distribution systems, to Germany, Sweden or to storage facilities).
   
   
2. Gas suppliers supply consumers with natural gas and invoice them accordingly. Under the Danish Natural Gas Supply Act, some gas suppliers are in certain situations under an obligation to supply consumers with natural gas. A gas supplier must enter into a consumer handling agreement with one or several distribution companies in order to supply gas to consumers in the relevant distribution area. The agreements are published on www.dongenergy.dk, www.naturgas.dk, www.ngfdistribution.dk and www.aalborg.dk.
   
   
3. Storage customers own the volumes of natural gas transferred  to them by shippers for storing in the gas storage facilities and will either resell the gas to ship-pers for onwards transportation via the transmission system or transfer it (perhaps in combination with capacity) to one of the storage facility’s other storage customers. Such transfers can only be effected within one and the same storage facility. For a storage customer to operate as such, he must conclude a storage customer agreement with Energinet.dk, be registered in the Register of Players and sign a framework agreement with one or both storage companies.

Finally, there is the role of gas consumer:

Consumers are all who buy and use natural gas for their own consumption. There is a distinction between daily metered consumers and non-daily metered consumers.

1. Daily metered consumers are enterprises with remote-read gas meters who typically buy at least 300,000 m3 natural gas per year per consumption site.
   
   
2. Non-daily metered consumers are all ordinary households and enterprises with minor consumption. Their consumption is read on a monthly or annual basis.