Energy Tradeoffs Podcast #30 – Rhodes & Meehan

This week’s EnergyTradeoffs.com podcast episode features David Spence interviewing Joshua Rhodes & Colin Meehan about their research on “Keeping the Lights on in a High Renewables Grid.”

Josh & Colin explain the concept of grid “inertia” and why it is so important for grid stability. The grid must always maintain the same frequency and inertia steadies this frequency when a power plant suddenly goes offline. They explain that wind and solar power do not provide the same inertia as conventional plants but describe ways of making the grid flexible to accommodate high levels of renewable power nevertheless.

Josh & Colin also describes how renewable power sources can provide “fast frequency response” as a substitute for inertia. But they explain that doing so would require reducing power output from these sources, which might require modifying markets to pay for ancillary services that maintain the grid’s frequency.

The discussion builds on one of Josh’s recent articles: “Evaluating rotational inertia as a component of grid reliability with high penetrations of variable renewable energy,” which was published last year in the journal Energy.

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