A stray current coming from HVDC is classified as?

A stray current coming from High Voltage Direct Current (HVDC) is classified as steady stray current because it typically flows continuously and consistently, maintaining a relatively stable magnitude and direction over time.

In the context of cathodic protection and corrosion, steady stray currents can contribute to electrochemical processes that may lead to corrosion of nearby metal structures, such as pipelines or other underground assets. This steady nature makes it different from intermittent, transient, or dynamic stray currents.

Intermittent stray currents vary over time, turning on and off rather than maintaining a constant flow. Transient stray currents occur only for short durations and often result from sudden changes in electrical conditions, such as switching events or disturbances. Dynamic stray currents are associated with changing electrical conditions that might not be sustained over time, like those from alternating current sources or rapidly changing loads.

Therefore, recognizing that HVDC systems typically provide a continuous flow of current is crucial, leading to the classification of the stray current as steady. This understanding is essential for managing potential corrosion risks and implementing effective cathodic protection measures.