Ireland’s thermal plants sail into probing wind

The level of wind penetration in Ireland is one of the highest in Europe. This has already had some major impacts on the market, including depressed wholesale prices; reduced running hours for some thermal plants; and curtailment of wind output. This week’s blog considers wider interactions of wind generation with I-SEM trading, particularly the Capacity Remuneration Mechanism (CRM). 

In managing this wind capacity, the TSOs, Eirgrid and SONI have focused on trying to accommodate wind while managing system stability. As well as ensuring that System Non-Synchronous Penetration (SNSP) levels are manageable. The SNSP is effectively the proportion of non-coupled generators running on the system at any one time. The TSOs ensure this level is not too high to cause frequency issues for the grid. The current maximum SNSP seems to be around 65%. This capability has increased from 50% in 2015 and the TSOs are targeting 75% by 2020. This increase is being facilitated by the DS3 balancing services programme.

We summarise how increasing wind generation and SNSP at certain times of day may impact the wider market in the future. It shows a high wind winter weekday scenario, mapping the daily load profile against two SNSP levels, the 50% limit of 2015 and the 75% target for 2020.

Related thinking

Low carbon generation

Our Renewables Pipeline Tracker: In with the new – scoping projects and progression through planning stages

Our latest Renewables Pipeline Tracker was published on 11 June, and this blog provides a summary of some of the recent developments in our coverage of the pipeline for new build and repowering renewables assets in GB. What’s new? Seabed leasing rounds, scoping projects and CfD announcements Since our previous...

Commercial and market outlook

In the midst of the Australian Energy Transformation Process

Australia is in the midst of an energy supply and distribution transformation. This transition is twofold and includes not just bridging the gap from conventional fossil fuels to renewable technologies (due to their reduced carbon footprint, lower levelized cost of energy and improved reliability levels by comparation), but also requires...

Low carbon generation

Nuclear energy and its potential importance for net zero

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Low carbon generation

Up north and down south – trends for generator TNUoS charging

The topic of generator Transmission Network Use of System (TNUoS) is becoming a subject of increasing interest for stakeholders as regulation, policy, and the generation mix create potential volatility for future charging trends. The significant costs posed through TNUoS are an important consideration for generators, with high variability between regions...

Announcement

Alert: Budget 2021

Chancellor Rishi Sunak delivered his Budget on 3 March, a year on from the start of the COVID-19 crisis and his second in the job. Headline announcements included, among others, a sovereign green bond, the UK Infrastructure Bank, a freeze in Carbon Price Support and £20mn for floating offshore wind....

Low carbon generation

New transmission charge forecast will help generators managing cost uncertainty and volatility

Transmission network use of system (TNUoS) charges represent a significant proportion of operating costs for many renewables generators, often exceeding 50% of annual running costs. For some, as recently highlighted by SSE in a recent report and to Members of the Scottish Parliament, they could present a barrier to investment in generation...

Regulation and policy

Answers to some FAQs about Brexit

Following the end of the transition period on 31 December 2020 and the signing of the Trade and Cooperation Agreement, aspects of the relationship between UK and the EU in respect of the arrangements for energy trading and cooperation have changed. We set out answers to some Frequently Asked Questions...

Energy storage and flexibility

System operators warn of System Alerts risk this winter

EirGrid and SONI issued their Winter Outlook for 2020-21 on 15 October in which they warned that if high generator forced outage rates continue over the winter period there is a risk of System Alerts. The transmission system operators (TSOs) said the all-island capacity margin this winter is predicted to be 929MW...

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