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Forecast Network Capacity Statement for Gas Year 2017/18 (1st Oct 2017 – 30th Sep 2018)

March 2017


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Licence obligation to publish a Forecast Network Capacity Statement ............................................ 3

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Determining the Forecast Network Capacity Requirement for Gas Year 2017/2018 ........................ 3

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Conclusion and Recommendation ................................................................................................. 3

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Forecast Network Exit Capacity

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[Public Draft]

Licence obligation to publish a Forecast Network Capacity Statement As per licence condition 2.19.2 of the SGN Natural Gas conveyance licence, SGN Natural Gas book and hold exit capacity on the Postalised Transmission Network for all Suppliers who operate within our Licenced Area. The licence requires SGN Natural Gas to hold capacity to meet the daily firm demand from network consumers on a 1 in 20 peak day. To facilitate the determination of the required capacity, the licence requires SGN Natural Gas to produce and publish an annual draft statement of its best estimate of Forecast Network Capacity Requirement for the following Gas Year and to consult interested parties. A draft network capacity statement was issued in February 2017 inviting interested parties to make representations on the content. As per the West Transmission Limited Transportation Network Code, SGN Natural Gas may revise the amount of capacity booked and held on the Postalised Transmission Network during the Gas Year.

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Determining the Forecast Network Capacity Requirement for Gas Year 2017/2018 SGN Natural Gas was awarded the distribution conveyance licence on 11th February 2015 for the Gas to the West project to develop low pressure gas infrastructure to convey gas to the towns specified within the licence. The first phase of the project, which is the development of the gas network in Strabane, is ongoing with gas flowing to the first customer in January 2017. Whilst the network in Strabane will be expanded during gas year 2017/18, the further phases of the overall Gas to the West network will not flow gas during the Gas Year 2017/18 and, therefore, are not relevant to this statement. As there is currently limited historical gas consumption data, the forecast 1 in 20 peak day demand for Strabane for Gas Year 2017/18 is based on our current network development plan – i.e. the forecast number and category of gas connections and the corresponding estimate of gas use by those consumers. While historical weather data has been considered as part of the forecasting process, the impact of this is limited due to the low level of heat dependant load to be connected during Gas Year 2017/18. SGN Natural Gas did not receive any responses to our draft network capacity statement and will therefore book daily firm exit capacity of 440 MWh (15013 therms) for Gas Year 2017/18. While the Transmission System Operators’ Transportation Codes now permit exit capacity bookings for a period up to 15 years it is our intention to only book exit capacity for 1 year at this stage, until greater clarity is available regarding development of the Gas to the West network and consumer connections as part of ongoing stakeholder engagement.

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Conclusion and Recommendation The methodology used to produce this draft statement of Forecast Network Capacity Requirement for Gas Year 2017/18 is considered to be fit for purpose. Therefore, SGN Natural Gas will submit a booking application for 440 MWh of firm daily exit capacity for Gas Year 2017/18.

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16th March 2017

SGN NI - Forecast Capacity Statement - 2017  
SGN NI - Forecast Capacity Statement - 2017