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Respectfully, as a power systems engineer, I'm unable to grasp how what you're describing is beneficial compared to current power networks or how it respects th
by eigenvector 6y ago
Respectfully, as a power systems engineer, I'm unable to grasp how what you're describing is beneficial compared to current power networks or how it respects the underlying physics of electricity.
The design of power transmission and distribution networks is driven by several physical realities: high voltage is needed to transmit power over long distances with acceptable losses, it is easier and cheaper to transform voltage and switch ultra high power circuits in an AC network than a DC network, all power conversion is lossy, electricity is hazardous and therefore electrical circuits must be insulated and protected adequately to protect public safety.
I've heard this question of "why don't we have some kind of universal power outlet that any load regardless of voltage or current needs can connect to?" before. The answer is the same as in many other fields of engineering: it's not efficient to overbuild every node in an network to handle any possible load when electrical loads are usually well-defined and do not change rapidly. We don't have a universal train that runs in the metro, for freight and for high speed rail not because it's not possible but because that would not be efficient. The same applies here.
- femto 6y agoThanks for the respect! I understand your points and I think you are correct in light of today's technology, but respectfully I think you're being a bit pessimistic about the future. (I'm an Electrical Engineer, qualified to work in power systems, but ended up working in data networks and RF.) What I'm envisaging doesn't rule out voltage transformations. A "packet" could have its voltage or current transformed as required to suit the mode of transmission. Nothing to say it has to remain as DC either. The idea is that the energy (or some other property) would remain the same (apart from losses). The packets might also be conceptual in some transmission modes. For example, take a bunch of "packets" all with the same DC voltage, butt them up in time and you have a regular DC transmission line with a constant voltage and current, the main difference being that you now have an embedded/parallel data stream which logically delineates the packet boundaries. This data stream allows the receiving station to treat each packet differently if required. The talk of non-specialists wiring systems doesn't mean your hairdresser will be running a 1MV transmission line across the suburb. Rather they could wire something like a house in a risk free manner with no need for a specialist electrician. The idea is that a source would be measuring what it is driving, so safety is inherent and serious power would only be delivered if the measurement says it is safe to do so. Yes, this is pie-in-the-sky talk. It's not a design, but a collection of wild ideas which might turn out to be practical. It's the sort for thing one talks about with colleagues at the pub, but those colleagues do include academics with high level power engineering qualifications and in conversations they are also thinking along similar lines.