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← TechnologyWhich operational challenge most commonly arises when integrating asynchronous renewable energy sources into legacy electrical power grids?
A)Harmonic resonance within transmission lines
B)Cascading failures from protection desynchronization✓
C)Increased dielectric stress on insulators
D)Reverse power flow through substations
💡 Explanation
When integrating asynchronous sources, variations in frequency can desynchronize protection schemes, because legacy protection relies on synchronized measurements. This leads to cascading failures. Therefore cascading failures is the most common risk, rather than harmonics, stress, or reverse flow which are less directly and immediately coupled.
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