Towards a hybrid AC/DC transmission grid
Transmission grids will have to change fundamentally in order to deliver reliable, affordable, and sustainable electric energy in the right quantity (and quality), at the right time, and at the right place. As the share of renewables worldwide continues to grow, the major shift in the generation mix - large wind and solar capacities in combination with many small scale renewable generation systems – will lead to increased and more volatile power flows, over larger distances. These developments will create challenges in securing the reliability of supply. For example, in Europe 80% of the bottlenecks in the grid are related to integration of renewables, either in their direct connection to the grid or in transmission corridors to the load centres.
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