Simultaneous AC and DC power transmission via 3 phase transmission line

232

02:00:45

This circuit simulates transmission of AC as well as DC power via same 3 phase transmission line. It superimposes DC onto AC  via primary Delta and secondary Zig-Zag transformer neutral and obtains DC current at other end of line via Zig-Zag neutral of Zig-Zag-Delta transformer. It has several advantages where of of the main advantage is line is utilised to its full capacity and aslo AC stability margins are unaffected by introduction of DC power

published 9 years ago

jpoulin0901

9 years ago

Is this a common practice anywhere that you know of?

jpoulin0901

9 years ago

I'm confused. Why is there a DC source at both ends? Shouldn't you have a separate DC load as well?

harialingal

9 years ago

No it's not used currently. Actually it is an experiment currently been studied and some researchers have verified successfully that AC and DC can be transmitted simultaneously

harialingal

9 years ago

Actually that dc sources are used here just to generate dc current. But practically It's more like HVDC transmission system embedded in AC transmission. Left dc source will be replaced by rectifier circuit which will inject dc and right source is an inverter drawing dc power.

jpoulin0901

9 years ago

Well then you should just make it a 100 ohm resistor in keeping with the other phase loads. I tried it and it works just fine. I don't really see how this allows superior optimization of line usage over HVDC alone though.

harialingal

9 years ago

can u send that circuit

rich11292000

9 years ago

I'm playing with it to. I need to clean my schematic and lay it out better. My setup utilizes a dual rail dc with positive dc on A phase, negative dc on C phase, and creating their common on B phase. This setup eliminates the current on the ground/neutral, as this described configuration would be a delta connection and only uses the ground as a earthing reference. Of course the dc configuration can be layed out numerous ways.

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