Grid Curtailment of renewables

Reduction / elimination of grid curtailments for renewables 

Issue of growing curtailment for renewables
Increasingly, the grid is no longer able to cope with the renewable generation at peak times, when demand is relatively low.   These times are on windy nights in winter, and at midday during the summer.

Grid curtailment will continue to grow as an issue as more generation is brought on stream in the next few years, as governments, businesses, and consumers drive towards net zero.

The impact of these curtailments are that generators are asked to reduce generation.  This means feathering the blades of the wind turbines, or reducing the the export of the solar generation.  On the island of Ireland this is already a significant issue with some wind farms being curtailed by up to 18% of their generation.

MaxGen, in conjunction with an aggregator, provides a service reducing, or even eliminating curtailment.  In the UK this works with ROCs, and so the generation, as well as the ROCs can be maximised.   In Ireland at present this works with a phased approach while assets are still benefitting from REFITs.  We are also working with the Irish government departments to modify the legislation.

The service operates utilising hydrolysis, grid services, fuel cell generation, and battery storage.  Curtailed generation can be utilised for hydrogen production, or for recharging the batteries.  Onsite fuel cells, along with battery storage can then participate in the balancing services in the UK, or the  DS3 services in Ireland.

The curtailment service provides the following benefits for the asset owner, the grid, and society:

  • Grows revenues for the generator by reducing curtailment, ensuring greater generation
  • Provides alternative revenue streams with balancing services, or DS3 services in Southern Ireland
  • Balances the grid, as well as more fully utilising the grid, enabling greater renewable penetration
  • Reduces the need for grid reinforcements, and fossil fuel/nuclear generation

In short this is a win, win, win solution for a world where renewable generation can provide a secure, balanced, low carbon and low cost grid.