Germany is in the process of implementing an energy revolution where wind and solar are taking over more and more of the power supply in Europe’s energy market. With fixed price for 20 years and primacy in the power grid, the German production of solar nearly doubled in two years.
Today, renewable energy sources for 25 percent of German power. But on some days with good conditions for wind and sun, covered the entire German energy needs from now own and renewable sources. German solar cells and windmills were in the coldest periods of the winter used to cover up French energy needs because the French nuclear power plants did not have enough capacity.
- Also read: Must produce more power
Until now, nuclear, gas and coal have been the proved reserves that could be added on days without sun and wind. But now the German energy sector for new ways to save energy and distribute it in the net when needed.
– The biggest challenge is to ensure flexibility in the system. This can be done by expanding the capacity of the transmission network. If we build out a lot better transmission to Scandinavia, Austria, Switzerland and Southern Europe, we will be able to achieve a flexible exchange between hydro-based systems and the European network. This is an inexpensive solution that would bridge the gap in supply of wind and solar energy, says climate expert Felix Matthes by Öko-Institut, which is one of Europe’s leading research centers for sustainable development.
Cache in electric vehicle
challenge by Matthes that new power lines leading to the natural environment. Another solution is to see whether electric vehicles can be used as an intermediate storage for power. Germany has a proactive policy to promote the use of electric vehicles and a well-developed network of charging stations.
– This is also an opportunity to make the power grid more flexible. The cars are in use only 10 percent of the time. This allows electric vehicles to a storage medium for electricity 90 percent of the day. We envision that car owners can earn money by renting out the battery to the power companies. This type of solution is discussed intensively, and several pilot projects have been initiated in which electricity companies take control of the batteries in electric cars, said Matthes.
- Read also: – Do not support windmills
There are no technological barriers to using electric cars that are connected to the charging stations extra batteries in power. The biggest problem is finding a business model that distributes the cost of battery used in a way that is attractive to both the owner and the electric power company. Batteries lose by taking, and the key question is who will take the cost of the battery.
– If you leave the power company to use your batteries will also shorten the life of the electric car. For those who will sell an electric car will condition the batteries be crucial to how much the car is worth on the used market. Pilot projects suggest that you must go in the direction that it is not the car owner, but the network operator should own car battery, said Matthes.
Used batteries
American scientists began at the other end when they want to make use of car batteries in its smart power system. Where is it used batteries to store electricity. Most batteries still have 70 percent capacity when the car scrapped. By ABB Smart Grid Center of Excelence in Raleigh being tested use of used car batteries as a storage medium for solar energy.
pump water
The head of the state-owned energy saving agency Deutsche Energie Agentur (dena), Andreas Jung, stressing that the storage challenge for volatile solar and wind energy must be solved in several ways. He neither more to use excess electricity to pump water up into reservoirs that can provide additional hydropower when needed.
– I will be careful not to say anything about where we end the matter of using car batteries as intermediate storage for power. We are working intensively on this issue, and the outcome is not given. However, using batteries in one form or another is a key issue on the way to the best possible use of solar and wind resources, says Jung NTB.
(AFP)
No comments:
Post a Comment