Worldwide Solar Grid Hypothetical

In summary, it is theoretically possible to operate a city or country on solar power generated on the other side of the globe, but the practicality of it is limited due to transmission losses and the need for expensive infrastructure such as superconductors or energy storages. Additionally, solar power is not the only solution for renewable energy and there are other factors to consider such as time zones and geographical constraints.
  • #1
ClarenceCarter
2
0
Hi everyone,
I am humbly here to ask a question. I have no EE training or education (as will become apparent) but I couldn't sleep and my head was churning and now I need to know:

Can you operate a city or country on solar power generated on the other side of the globe? i.e. Could solar power generated in Australia be used to light a bulb in London? The upshot of this is that if we had a 'critical mass' of solar generation and an intelligent grid would we be able to always have 'base load' solar?

Please remember I have no technical education. Everybody here is smarter than me. That is why I am here, right?

PS: Please disregard financial/geopolitical complications. I am merely asking if physics will permit the theory.


ClarenceCarter
 
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  • #2
In theory, it is possible, but cables with a length of 20 000 km would waste most of the energy as transmission losses, only a small fraction of the power would reach its destination.
Superconductors would not have those losses, but they need constant cooling.

Those long cables would transmit DC instead of AC, by the way. It can be converted from/to AC at points where electricity is generated/needed.

Power consumption is higher in the daytime - unless you plan to generate all power with photovoltaics, those cables are not interesting. And even then, I think energy storages are cheaper than those really long cables. You need them anyway to cover a variable cloud coverage.
 
  • #3
Power requirements in cities spike around breakfast time and dinner time, i.e. as the sun is rising and setting. So if we generated the power for those times from a small (longitudinal) distance away, might we have a more feasible system?
 
  • #4
Significant power transmission over 1500km exists in China, and systems for up to 5000km (Desertec) are proposed. You lose something like ~5% of power per 1000km, depending on the cable quality and transmitted power.
 
  • #5
Solar power includes several other solutions than photovoltaic cells. Some convert solar power into thermal energy, allowing electricity generation after the sun has gone down, reducing the need for a interconnected grid as you propose.

Read up on the wiki:
https://en.wikipedia.org/wiki/Solar_power

As for power transmission, the existing grid includes several thousands of km with connected grid. Some are only transmitting (tie-lines) from one region to the other, other have consumers and producers connected along it.

In an idealized way, power production (solar power) and consumption follow time zones (solar production would have a more linear curve, and not discrete as in time zones). So you don't have to transmit power all the way to the other side of the globe. Only a few time zones away, reducing the distance. To some degree this might be provided by the existing grid.

Germany is one of the leading countries in using solar power. Below is a chart of the electricity generation during two days.
Germany_Electricity_Generation_5-25-26-2012.png

Source

At 9 pm the solar production stops. If you would still use solar power in Germany at this instant of time you would have to import it from a location with sun. Below is such a map. At 9 pm on the day in question:
sunmap.php?iso=20120525T2100.png

Source

As noticed, your options are limited due to the Atlantic ocean (unless you can have offshore solar plants?) During the morning, your options will be better, allowing import from the eastern countries.
 

Q: What is the concept of a Worldwide Solar Grid Hypothetical?

The Worldwide Solar Grid Hypothetical is a theoretical proposal for a global energy system that would utilize solar energy as the primary source of power. It suggests the creation of a network of interconnected solar panels and storage facilities that would span the entire planet, providing clean and renewable energy to all regions.

Q: How would a Worldwide Solar Grid Hypothetical work?

In essence, the Worldwide Solar Grid Hypothetical would involve the installation of solar panels in strategic locations across the world. These panels would capture sunlight and convert it into electricity, which would then be transmitted via a network of cables and storage facilities to different regions. The energy could then be used for various purposes, from powering homes and businesses to fueling transportation and industrial processes.

Q: What are the potential benefits of a Worldwide Solar Grid Hypothetical?

The main benefit of a Worldwide Solar Grid Hypothetical would be the transition to clean and renewable energy sources, reducing our reliance on fossil fuels and decreasing carbon emissions. It could also provide a more stable and reliable energy supply, as solar energy is available in most parts of the world and is not subject to price fluctuations like traditional energy sources. Additionally, it could create jobs and stimulate economic growth in the renewable energy sector.

Q: What are some of the challenges of implementing a Worldwide Solar Grid Hypothetical?

One of the main challenges of a Worldwide Solar Grid Hypothetical would be the initial cost of installation and infrastructure development. It would require significant investments to build and maintain the solar panels, cables, and storage facilities. Additionally, there may be technical challenges in integrating the system with existing energy grids and managing the flow of energy across long distances.

Q: Is a Worldwide Solar Grid Hypothetical feasible?

While the concept of a Worldwide Solar Grid Hypothetical is still in the theoretical stage, many experts believe that it is feasible with current technology. However, it would require significant political will and collaboration between countries to make it a reality. There are also ongoing research and development efforts to improve solar technology and make it more efficient and cost-effective, which could make a Worldwide Solar Grid Hypothetical more viable in the future.

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