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← TechnologyWhich risk increases when a photovoltaic string inverter repeatedly disconnects?
A)Reverse bias breakdown increases
B)Grid impedance synchronization fails
C)Capacitor dielectric overheating occurs✓
D)Transformer core saturation worsens
💡 Explanation
Repeated disconnection causes voltage surges; higher inrush currents accelerate **dielectric degradation** in DC link capacitors because the voltage increases rapidly, therefore shortening its lifespan, rather than causing immediate breakdown or grid instability.
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