A key aspect of gas to grid connections is the gas quality monitoring equipment. The gas supplier has to ensure that their product meets the needs of the Gas Transporter, which are based on the Gas Safety (Management) Regulations GS(M)R 1996.
NTS requirements for gas quality are stated in the Gas Ten Year Statement (GTYS), which is published every year to give customers and stakeholders a better understanding of how we intend to operate and plan for the NTS over the next 10 years. The GTYS specification for oxygen content in gas is 10 parts per million (PPM), which some potential customers told us was an absolute barrier to connecting to the NTS.
Project CLoCC was able to update GTYS to make it clear National Grid will consider requests for oxygen content up to the GS(M)R specification of 2000ppm on a case by case basis. This update went live on November 30, 2017 and we expect it to give greater flexibity to potential new customers.