D.C or A.C the power needed are in terms of few Watts(W=(V)(I)), with 110 volt also the conductor cross section are, for carrying the current needed would be considerable. Hence for low voltage around 10 to 25 volt the needed size of cross section would be 10 times larger which is not practical, efficient and economical hence is not feasible to have low voltage distribution, even for residential.

This is a generic question my dear colleagues, I could not set a max distance of the cable conductor, I just exploring this field in order to assess the likelihood to start a research in this area.

I am not recommand that

I beleave it is not feasible

In this small forum, I can notice that it is not feasible, nonetheless, it is highly noticeable many outstanding DC microgrids deployed all around the world. If it is not possible why are some investors like Tesla betting on it?, I kindly request you an explanation about this phenomenon.

Dear Antxon,

After reading thoroughly your answer to my query, I can understand that you are not neglecting the feasibility of DC Microgrids, at the it seem that you are a supporter of DC system, unless at home level, is it so?.

By the way, thank you for cite the Prof. Rodriguez, I will follow him.

Best regards,

That is the point, the future is already among us, but still, there is a lot of resilience against DC, even though, with Renewable Energy integration undoubtedly make out easier the transition towards DC distribution systems.

I almost forgot again to recommend one of the researchers who is a leader in DC systems like Prof Rodriguez, it is highly recommended the work that had made Chris Marnay at Berkeley.

Moreover, I am completely open to develop any farther collaboration in this area, you can count with me. Indeed, I was working on ROAD2DC an ELKARTEK Project which was coordinated by Jon and Eneko at Mondragon Universitatea last year.

Best Wishes

yes, would be economical, reliable and efficient, to supply the load area near solar/ wind power plants with low voltage lines 110/220/440 instead KVs....

Dear Desai,

I have just finished noticing that you have changed of mind over the first opinion on the discussion, I kindly ask you what did you make out?.

Best regards

Both answers are correct, confusion created by your unclear question....

Dear Tony Castillo-Calzadilla ,

Why do you want to restrict the use of DC at low voltage. I would like to pay attention that the super high voltage power lines are HVDC.

From the conceptional point of view one can use DC as the AC even the DC has some advantages. The voltage drop on the cable will be smaller because of the zero reactance at DC transmission.

The point against the DC is its safety. The AX is more safe the DC with same voltage.

The other main advantage of the AC is that one can use transformers to step up and down of the voltage. But know with advent of power electronics the DC voltage can be step up or down by the DC/DC converter.

One sees that the use of DC is feasible and controllable like the AC thanks to the power electronics.

So, I would propose that if one generates DC as in the PV generators one can use it and distribute it in DC form. If the loads are DC loads then it is will be really good

the problem is the less availability of DC loads.

In case of Dc distribution and AC loads one can provide the AC loads with built inverters as now the DC loads are supplied by rectifiers.

Best wishes

Dear Abdelhalim abdelnaby Zekry

I have a few to add to your strikingly comprehensive answer. Although I am aware of HVDC distribution systems developed by Siemens and for ABB, in this case, I would like focusing on Low Voltage because I am seeking the opinion of experts like you about the feasibility of a new standard for homes/buildings either or districts in urban areas, I mean not only for remote villages isolated from the utility grid. This question arises because in the way on the energy transition pathway the electric car will play a capital role not to mention renewable systems, and this sort of systems seem to be more appealing to DC. I wonder the LVDC systems will become massive in the future?.

Best regards

Dear Tony Castillo-Calzadilla

Yes, I agree totally with you. As the DC loads increases one will think on DC power distribution. The same holds also for the availability of DC sources. As the DC sources increase one may encouraged for DC power distribution.

The advancements in power electronics will encourage the DC transmission.

I would like that you look at my proposed road map for PV generation in the future:Article A road map for transformation from conventional to photovolt...

Best wishes

Dear Abdelhalim abdelnaby Zekry

I will be pleased to read your proposed roadmap for PV generation and thank you for sharing it.

Best wishes