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Four Phases in Variable Renewable Energy Integration

Four phases in variable renewable energy (VRE) technologies integration.

IEA article addresses the issue of renewable energy variability and how to deal with it and identifies four phases, hand in hand with the level of renewable energy penetration in a society.

  1. No impact. You can add new renewable energy capacity without having to worry about variability at all
  2. Focus shifts to managing first instances of grid congestion and to incorporate forecasts of VRE generation in the scheduling and dispatch of other generators.
  3. In the last two phases, wind and solar start to affect the overall grid and other generators. As the share of VRE grows, the challenges that power systems face will relate both to system flexibility – relating to supply and demand in the face of higher uncertainty and variability – and system stability – the ability of the of power systems to withstand disturbances on a very short time scale.

[iea.org] – Getting wind and sun onto the grid

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