Which risk substantially increases when integrating renewable sources into existing power grid systems that use synchronous generators?

💡 Explanation

When integrating renewable sources like solar/wind, reduced system inertia occurs because these sources often lack the rotating mass present in synchronous generators, decreasing inherent stability during disturbances. Therefore, reduced inertia and frequency instability are risks, rather than compensation, surges, or accelerated aging which correlate more with alternative grid instabilities.

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