Learnings

Outcomes

Year 2018/2019

None to report to date since project is at an early starting stage.

Year 2019/2020

It is shown that overload rotation is able to serve as an alternative to conventional network reinforcement in certain cases and scenarios when it is applied correctly to the transmission network in a coordinated fashion. The investigations have also shown that the availability of controllable resources and their geographical locations can have significant impacts on the effectiveness of overload rotation. The studies carried out also show that, rotating the overloads at the current asset status quo may not be enough to ensure boundary capabilities for certain scenarios. In these scenarios, the areas identified could be used as indicators to prioritise the making of connection location.

Year 2020/21

The economic model proposed shows that overload rotation has the potential to be used as an ancillary service that might be able to postpone conventional network reinforcement while providing added security to the network.

Lessons Learnt

• A zonal based approach is a feasible and effective solution for large network reduction and its subsequence optimisation.
• The number of zones in the reduced model should be based on the number of dominant substations and their corresponding transmission circuits.

Dissemination

• The key findings and results from work package 1 was shared with key national grid stakeholders in the workshop held in June 2019.
• Further dissemination will be carried out through annual summary reports and ENA smarter network portal.