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← ScienceWhich risk increases when a high-voltage DC transmission line's capacitance to ground sharply increases due to heavy rain?
A)Corona discharge and power loss
B)Transformer saturation and overheating
C)Line reactance compensation failure
D)Voltage surge during switching events✓
💡 Explanation
When line capacitance rises due to rain, increased charge storage occurs because the dielectric constant of surrounding medium changes, escalating voltage transients during sudden switching. Therefore a voltage surge results, rather than corona discharge, transformer saturation, or compensation failure that originate from different grid phenomena.
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