Renewable,Sustainable energy review10 Feb 2018 18:29
Gas generation and wind power: A review of unlikely allies in the United Kingdom and Ireland...........................................................................
The impact of gas infrastructure outages on energy systems with limited supply routes poses a significantly larger security of supply risk. Multi vector analysis for the Irish system was carried out in [61], where it was found that gas interconnector outages resulted in a significant decrease in power system security. The lack of storage infrastructure and alternative supply routes for the Irish system was the reason for such significant power price increases in the gas of outages of the single supply point. ...........................................................................
It is clear that in order to adopt high penetrations of renewable energy into the power system, significant levels of investment is also required in gas infrastructure. As previously discussed, the flexibility required by the power system is increasingly being sourced from the gas system. Gas storage is a significant provider of this flexibility, but requires significant investment and many such projects in GB are not being developed due to commercial risks such as low summer winter gas spreads and uncertainty over future energy policy [63].
However, in systems where long term energy security in the form of wind power is endangering short term gas system and thus power system security, investment in gas infrastructure is a necessity. This is especially true for the Irish energy system, as natural gas import reliance through a single entry node from GB was 95% in 2013/14 [13] and where wind power capacity is forecasted to be 32% of total installed generation capacity by 2020 [3]. Twinning of a section of the single import route for Ireland has been identified in order to reduce congestion on this vital piece of infrastructure [64]. Additionally, the development of a gas storage facility in NI is forecast to provide greater security of supply for the island of Ireland and explicitly for the GB system [65]. ....................................................
Lack of investment in this critical infrastructure would not only undermine the overall pursuit of renewable energy as a long term security of supply solution, but would actively contribute to the restriction of the gas system to accommodate high penetrations of wind power. It can be concluded that the sometimes overlooked dependency of power system flexibility on natural gas transmission infrastructure is increasingly important in power systems with high penetrations of wind power. As the penetration of wind power increases, the variability required to be accommodated by gas generation and its associated infrastructure will continue to increase. In turn, the value of multi vector energy analysis and the wide ranging system level impacts of high renewable energy penetrations will be vital for optimal adoption.