- disastrous failure mode which essentially requires full redundancy for each breaker + flawless maintenance practices;
- poor resistance to overcurrent;
- on-state losses (which depend on power transmitted; these losses follow Ohm's Law).
I believe my elpipe technology (described in the attached paper I presented to the Power and Energy Society at their July meeting in Detroit) is a complementary technology to offshore power lines. Elpipes enable high capacity underground HVDC transmission; there would be a large reliability boost if the two ends of he AWC could be tied into a land-based HVDC line that "completes the loop." Electrical loops are "self-redundant" because any pair of taps on the loop are connected in two directions: clockwise and counter-clockwise, as long as there are circuit breakers between each next-neighbor set of power taps (as described in my PES paper and this more recent discussion of highly redundant HVDC grids based on elpipes in China). Ballistic Breakers™ can be economical enough, plus they have negligible on-state losses, so that power may travel through many Ballistic Breakers™ between where it is generated and where it is used, as is needed to create a fully redundant DC loop. But I know we must crawl before we can walk, so my initial development effort for Ballistic Breakers™ is aimed at 6kV DC, not at HVDC applications like AWC.
The Atlantic Wind Connection and Tres Amigas are the two most innovative transmission projects in North America, I think. I very much want both of of these projects to succeed.