Polaris solar PV net news: recently, the Germany Agency for international cooperation (GIZ) released on Germany energy transformation 12 insights (Chinese version) (hereinafter the report). The headline of the first opinion of the report, is “solar and wind power is everything”. Throughout Germany renewable wind and solar power are “energy transformation” the two key pillars. Germany authorities estimated that by 2022, the country’s wind and solar power will account for renewable electricity 70%, then continued to rise reaching a percentage result.
Germany “energy transformation programme,” Chief RainerBaake said Germany hoped that over the next 40 years will be its power industry from the reliance on nuclear power and coal, switch to renewable energy, Germany this transformation of the energy system is called “energy transformation (Energiewende)”.
“Of course these opinions applies not only to Germany, and this is because wind and solar power in most parts of the world can be a large number of acquisition, production costs are also rapidly declining. Wind and solar PV will form the basis of future low-carbon energy system in many countries, these countries will also benefit from similar Germany challenges currently facing. “RainerBaake said.
Scenery is the largest future potential of technology
Germany has always been in favor of green energy than other European countries, also have a natural fear of nuclear power. Someone puts this down to the romantic feelings, or because they are living in a country where population density and scarcity of natural resources.
The report also notes that, by Germany in the renewable energy sources Act, setting off a technology race has two winners–wind and solar – the greatest potential in the foreseeable future, the most economical technology.
The report showed, with Germany the renewable energy sources Act price decline, and further reductions in the cost of wind power and photovoltaic technology, by 2015, the new wind and solar PV power plant generating cost is likely to remain in the range of 7~10 euro cents/kWh.
“Because wind and solar power are not always able to obtain, therefore dependent on both energy of any electrical system must be equipped with backup power plants, and these power plants will continue to rely largely on fossil fuels.
Short term, the existing power plants will assume that backing (current trading price of about 5 cents/kWh). The medium term, would need to invest in new power plants, so that even when renewable energy not power generation to meet demand. “RainerBaake said, because the new generation of gas-fired and coal-fired power plants cost about 7~10 euro cents/kWh, and peak electricity demand is also relatively cheap, expected by 2015, wind, solar photovoltaic power generation plant based on new and flexible system of thermal power plant generating cost, with the use of conventional coal or gas power system costs.
Germany “energy transformation” officially started for only two years, it’s every move but concern Europe and the whole world. Has been “cautious” with the Germans to more careful. Compared to the official rhetoric, the report seems to be more practical, from the technical and policy aspects of “energy transformation” suggestions to improve the proposals. Report, “energy transformation” faced the central challenge is how to implement fluctuations in wind and solar power plants in electricity production and consumer demand for sustainable and equitable. It will need to show flexibility—of electric power system on the supply side and the demand side is true.
Base load “power plants disappear
In report depicting of future scene in the, for established wind and solar PV for based of power supply system, must completely change future power system structure, makes power system in the other part are around wind and solar for optimization, eliminated Hou remaining of traditional fossil fuel power plant will main as alternate capacity exists, only in almost no sun and wind Shi only needs power, so-called of “basic load” power plant will became history.
“Of course, this scene is also facing new challenges, that is how the system is flexible enough to adapt to the fluctuation of renewable energy generation?” Qin Haiyan China Wind Energy Association Special Committee Secretary-General proposed.
At this point, the report noted that currently provides technical solutions already have enough flexibility, the crux of the matter is not a technical question, but in the appropriate use of incentives to create a fair competitive environment, ensure that cost-effective technical solutions were used preferentially. The flexibility of the system, through the supply side and demand side flexibility options, and power capacity and storage to achieve, for now, flexibility to increase thermal power plant is in addition to network expansion is one of the most effective ways.
Qin Haiyan told reporters that the thermal power generating units, has huge potential to enhance flexibility. Through technological innovation and optimize the organization structure, white-the minimum load of coal and lignite-fired power plant can be taken up respectively from the current installed capacity of 40% and 60%, to 20% and 40%. A kW-scale thermal power plant, and within 5 minutes the maximum load can be raised from the existing jiwanqian tile to 200,000 ~ 300,000-kilowatt, cold start time can be reduced from the current 10 minutes to 4 minutes to 6 minutes.
Grid energy storage system of low cost
Increased system flexibility on the way, the report argued that, in quite a long time in the future, compared with the new energy storage technologies, the integration of renewable electricity into power through the expansion of the network system costs less.
“The current new energy storage technology high, and is expected to remain high in the medium term, combined with low utilization, cost control from the system’s point of view, its poor economy, so should give priority to the use of other economy better ways. “According to the report’s estimates, only when exceeding 70% per cent of renewable power, new energy storage technologies to Germany cost control to the positive effect of the power system.
Germany Agency for international cooperation (GIZ) Director Mu Siwen also points out in the field of energy, energy storage technology can be an important area of research and development, but not necessarily the top priority. Expanding the scope of network connections and scheduling, can take full advantage of not only the area of renewable resources differences, sustained-release the volatility of renewable electricity, power can also be used as “indirect energy storage systems”, by regulating the market power in generation costs between the different regional free trade.
In addition, the report also suggested that the combination of electricity and heating, will greatly enhance the flexibility of the system. Compared with the energy, heat energy is easier to store, and losses are lower. Wind turbine made in the winter season and the peak energy demand, which is both natural and beneficial contact. According to the needs of both electricity and thermal energy, upgrading of existing power generation facilities is not a problem, Germany many power companies already installed “go hot” and the storage system.
Original title: Spotlight on Germany energy transition: solar and wind energy everything?