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science & techPBS NewsHour

Outdated power grids a major hurdle in renewable energy transition

the gist

Many of the world's electricity grids were designed for large fossil-fuel plants sending power one way to customers, and they are struggling with solar and wind. Renewable projects are often built far from where power is used, and the lines to carry it away may not exist or may be full, so some clean electricity is wasted when output exceeds what the grid can take. Old equipment, slow permitting for new lines and long queues to connect new projects add delays. Wind and solar also vary with weather, which requires more flexible grids, storage and better forecasting. Upgrading transmission is therefore as important as building the generators.

so what

The shift to renewable energy depends as much on wires as on panels and turbines. Without grid upgrades, cheap clean power can be stuck while fossil plants keep running.

fun fact

In some regions, projects wait years in connection queues before they are allowed to plug into the grid.