Which risk increases when a high-voltage DC transmission line experiences rapid voltage fluctuations?

💡 Explanation

When a high-voltage DC line has rapid voltage fluctuations, intensified transient currents flow into capacitors because capacitive impedance varies inversely with frequency, causing overheating reducing the lifespan of these capacitors. Therefore, dielectric breakdown risk increases, rather than corona discharge, EMI, or core saturation which are effects of constant high frequency signals.

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