HVDC system based on VSC technology built with IGBTs.

[DUET]

In the above fig the arrow indicates that just reactive power is following in and out from the AC1 & AC2. Does it mean that there is no real power follow from AC1 & AC2.

 

[UltrafastPED]

Reactive power always flows out and back; they are just making it clear that it has to be accounted for.

The bidirectional arrow labeled real power indicates that real power may be drawn from AC 1 or 2.

 

[DUET]

Hello! thanks for your response. Could you please answer to my following question?

There is only one bidirectional arrow at the transformer near AC1 & AC2 which indicates reactive power can follow in and out the transformer. Can I add one more bidirectional arrow at the transformer to represent real power follow? Because I think, not only reactive power but also real power is following in and out the transformer.