Which consequence results when power transformers experience geomagnetic disturbance (GMD) events in electrical grid systems?

💡 Explanation

Transformer GMD causes quasi-DC currents in windings; this induces increased reactive power demand due to half-cycle saturation of the magnetic core. Therefore, greater reactive power is drawn within the grid, rather than stable performance and reduced stress levels.

• Within a hydraulic robotic arm, which risk increases when the actuator's spool valve experiences significant wear?
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