I’m working on fuel cells right now, but our fuel cells are primarily designed to be energy storage technologies for solar or wind energy, so I know a little bit about my upstream energy.And I’ve been doing solar cell research for a couple of years, and I’m very interested in the whole new energy.Recently discovered a very interesting topic, block chain technology and new energy combination.The combination of hot bitcoins and future clean energy has led many start-ups to spot opportunities, such as the LO3 and Siemens digital grid practices in New York.Microgrid on a OuKuai Lian Platform.I want to combine my understanding of new energy and analyze whether the blockchain technology can really help the large-scale application of new energy technologies.Welcome to the discussion.
First, I’d like to discuss the amount of energy that can be traded through blockchain technology.Blockchain technology can make small energy contracts in a safe way without the middleman, and decentralize the transaction in the power grid.At present, the vision of the start-up company is basically to deal with households in the micro grid.Obviously, this energy should come from distributed photovoltaic technology.We distributed photovoltaic technology most mature and developed in Germany, for example, German photovoltaic power generation in 38.737 GWh each year, 70% come from distributed photovoltaic power generation, German rooftop photovoltaic equipment probably around 1.5 million units, it would average household can generate electricity 17200 KWH/year. (the above data from: Solar power in Germany, http://www.cseindia.org/userfiles/Anil%20Misra_Rooftop%20solar%20PV%20in%20Germany.pdf, http://mnre.gov.in/file-manager/UserFiles/workshop-gcrt-0870616/german.pdf). According to the installed capacity and Germany sun calculation, household electricity in about 15500 KWH/year, were similar, take the most high.According to the word energy council, the German household electricity consumption is 3512 KWh/year.The comparison between household electricity generation and household electricity consumption can be used to infer that large amounts of energy can be traded in Germany if blockchain technology is widely used in Germany.But the same technique may be in the United States is not so optimistic, because the EIA data shows the U.S. average household electricity consumption of 10766 KWH/year, can be used for trading is much smaller than in Germany (How much electricity does an American home use?).
But I have to admit that this is a very optimistic estimates, because I calculated according to the data publicly (capacity of 41.3 GW, 70% comes from the distributed power generation), German distributed photovoltaic every equipment an average of 18 kw, for the average family users, the big power.I personally feel single-family capacity should be not more than 5 kw, so that could generate only a ordinary family in 4320 KWH, slightly bigger than the year of the family consumption, can be used to block chain trading energy becomes much smaller.The same 5kw photovoltaic power plant, even in Arizona’s sunshine, should have just met the American household’s electricity consumption, with no rich electricity to trade.For this reason, blockchain technology can be used for trading in a small amount of energy in a typical community microgrid. In other words, the market is not large.
After considering the amount of power available to trade, the second question is who to trade and when to trade.The figure below shows the peak hours for residential electricity consumption.We found that peak solar power and peak electricity consumption were staggered.In other words, because there is no cost reasonable storage measures, it is difficult for us to within the same micro grid, selling to your neighbor you redundant power, or cannot be sold in full, because at the height of your power, your neighbor does not need so much power, they need power, your photovoltaic device just doesn’t provide enough power for trading.According to the load profile, the peak of commercial electricity consumption is overlapped with the peak of pv power generation. Can we sell electricity to commercial electricity units through blockchain?I think it’s a direction, but the investment has gone up a lot.Because you need the so-called power back, with adjustable voltage transformer to transfer electricity to the grid up and then step-down to business units (foreign residential and commercial district is generally divided, are relatively far apart).And this process seems to involve third parties, power transmission and distribution units, can the blockchain be realized from the transaction?I don’t understand that. I hope the professionals teach me.In short, the small and micro grid lacks the object of the block chain technology transaction, and it needs the participation of the power transmission and distribution unit to realize the block chain transaction in the larger region.This is one of the few things that new energy companies in the blockchain are talking about, perhaps limited to the larger cost of power grids.
Figure 1. Load profile through one day（Daily load profiles for residential, commercial and industrial low voltage consumers）
Third, I’d like to talk about whether blockchain technology can make the grid more secure, making solar or wind power less disruptive to the grid.Before I talk about this, let me go back and analyze the impact of the 15 years of European solar eclipses on photovoltaic power generation and the power grid (why the eclipse didn’t “eat” the German grid, the People’s Daily network).During the total solar eclipse in Europe on March 20, 2015, the solar eclipse caused by the eclipse was as high as -273 mw/min and 361 mw/min respectively.This rate of change has a huge impact on the grid, but the German grid has passed the test.How does the German grid work?Germany is through thousands of power traders, France and Poland, all of which are close to the country’s thermal power generation and nuclear power plants through the European grid.So what can block chain technology do to help our grid become more secure?Without proper energy storage measures, want to let the grid security pass, there must be a sufficient number of spare unit load to cope with this eclipse or volcanic eruption cloud blotting out of the crisis, neighboring countries didn’t provide enough conventional electricity, even block chain provides a perfect trading platform is of no significance.Assuming that the block chain technology has emerged from the micro-grid level and can play a role at this level of European power grid, can the trading speed of blockchain be able to cope with this level of crisis?I don’t have a very deep understanding of the block chain technology, and I can see that the block chain technology can handle only 7 transactions per second (which is also correct for professionals).If blockchain technology is not enough to cope with this crisis, will we still need an artificial power trader team to prepare for the crisis?It seems not enough to bring into play the function of the chain block for grid guarantee, in order to guarantee the absolute safety of power grid, we should prepare enough for unit load, conventional energy sources and to prepare artificial electricity traders team.
Finally, I’d like to summarize my point.Block chain technology combined with new energy technology, is a very interesting direction, but I think in micro grid level, its lack of floor space, on the use of a higher level, it technology also needs to improve itself, at the same time also depends on many other areas of technology development, such as energy storage, such as the Internet of things development.In a word, there is hope, but hope to get rid of the gimmick, down-to-earth development, do not make PPT power generation.