Breaker hybrid HVDC

HVDC main challenges with protection and switching:

* Direct-current #fault current has no zero crossings.

*Direct-current line impedance is significantly lower.

This implies much larger fault current magnitudes and a low voltage level across the entire grid for a DC fault.

*Locating a fault in DC grids is more difficult because of the low impedance, in line, there is a strong requirement to clear #DC faults in a short time and therefore the fast speed of protection system operation is very important.

By analogy, the phenomenon that occurs in the aqueduct networks when a valve closes FAST is called a water hammer, which can cause a rupture in the pipe due to the collision of the fluid with the installation, generating a pressure wave.

Like this, all phenomenons of transients such the big importance for #HVDC systems.

HVDC made the electrical engineering world sit up and think differently about how electricity is best transmitted

#hvdc #DC #circuitbreaker #currentwar #surgewaves #travelingwaves #timedomain #SEL #bergeron #climatechange