Polaris solar PV NET: State grid Energy Research Institute, according to a report published recently, with the development of renewable energies, Germany began facing renewable energy abandoned electrical problems. Germany abandoned to what extent and how to solve the problem?
Renewable energy abandoned electrical problem
Some areas abandoned wind rate of 8%
Germany is a worldwide model for grid-connected renewable energy development and operation. Since 2000, Germany can gradually increase the proportion of renewable energy in the power structure, Germany grid security, electricity market operation has brought a series of technical and economic challenges.
Under EU law, in grid security context, Germany renewable energies priority access rights. However, some time to ensure safe operation of power grids, not all include wind power, photovoltaic power supply has the right of access can be accepted in full. So when threats to network security, renewable energy up is inevitable.
Renewable energy leave Germany the Federal Network Council to supervise. Germany 2015 network monitoring report released by the Federal Network Agency show 2014 Germany renewable abandon rate of 1.16%, to create a historical record, this value is still at a low level, but the 0.44% has been raised 3 times than in 2013 and 2009 value of only 0.1%. Consistent with other countries, Germany abandoned turbine is a wind turbine, followed by solar power, biomass power generation, etc.
Germany renewable abandoned the main cause of electric power supply and load distribution of inconsistency. In Germany, wind power mainly in the relatively sparsely populated northern and Eastern regions, while Germany electrical load centers are located in the more densely populated southern regions. Germany Alex Braun Institute of Hove disclosed that Germany Northern abandoned the wind and more serious, has abandoned wind rate in some areas is as high as 8%. Germany renewable up mainly in the distribution network. In 2012, Germany renewable abandoned 98% in distribution networks, only 2% took place in the grid. Difference in degrees around the abandoned, are likely to be limited to the generation of 60% and 30%, even 100% the complete abandon.
Germany provisions of the renewable energy law, renewable energy abandoned will be compensated by the distribution network operator and the transmission network operator. In 2014, Germany renewable energy loss caused by the abandon of 82.7 million euros. For renewable energy to abandon compensation, Germany asked for at least abandoned power in 95%.
Grid focus with three aspects of work
Response to renewable up electricity, Germany carried out extensive exploration. Among them, in power, Germany did a lot of work.
First, optimizing network planning, operations and construction, an active power to dissolve. In solution can renewable energy power and power load distribution inconsistent problem Shang, Germany provides 4 Home transmission operators should common consultations and bear Germany grid future 10-20 years of optimization run and network expansion work; power and load distribution differences larger, and local elimination na more difficult of area, need expansion long transmission lines road; promoted distribution grid of intelligent optimization upgrade transformation, to promote can renewable energy local elimination na; application most advanced technology, guarantees can renewable energy mass access Shi, Without a substantial increase in power grid investments.
Second, the left margin extra in the planning process, greatly lowering the cost of power to dissolve renewable energy generation. Germany Federal Department of Economic Affairs and energy issued by adapt Germany energy transition of the electricity market white paper and Germany relevant laws, provisions can remain in power system planning and design takes 3% to abandon power, consider renewable energy to abandon 3% because the required power to dissolve “the last 1-kilowatt of electricity” does not have the best economy. In the process of implementation, 3% passing, greatly reducing the cost of renewable energy power to dissolve, operating expansion enables the network to reduce costs and promote renewable energies to find a suitable balance between the absorptive. Research report noted that reduce power 40% 3% passing expanded investment, reduce the costs associated with distribution operations around 15% in the future.
Third, reduce reserve requirements for power, mining and the full potential the flexible adjustment of the system. Reduce the necessary to ensure the stability of the system of traditional backup capacity, look for other sources of flexibility resources, play a renewable energy and energy storage capacity to provide ancillary services, has become the Germany energy power industry professionals to discuss important issues.
Germany power network monitoring and dispatch technology progress, making dispatching personnel to finer time scales arranged schedule, calculating and configuring System standby, reducing power system reserve capacity requirements. Meanwhile, Germany is currently running with base load is still relatively high percentage of conventional power is considering phasing out nuclear power units.
According to Germany Agora Energiewende one study found that energy research institutions, abandoned not only renewable energy output exceeds demand, lack of flexibility of system resources has become an obstacle to Germany renewable energy to dissolve an important factor. These flexibilities include storage and demand-side management. Germany Government announced the results of a study show that strengthening of industrial, retail, commercial and residential electricity demand side management, making full use of electric, heat pump, boiler and hydrogen energy will be Germany network flexibility the main sources of resources.
Scientifically designed renewable power market to dissolve is significant
Germany’s success shows that the electricity market is established in Germany as well as Europe-wide flexible electricity wholesale markets, retail markets, and to improve system efficiency and renewable energy to dissolve was very important. In particular, the short-term market is crucial to optimize power generation. Germany’s experience are:
Ensure the free electricity market pricing mechanism. In electricity markets, electricity prices reflect the cost of electricity and plays a decisive role in resource allocation. In Germany 2.0 in electric market, continue to maintain free pricing mechanisms to strengthen price signals to market incentives.
The European single electricity market development under the environment of electricity market. Germany Federal Department of Economic Affairs and energy published the adaptation of Germany referred to in the white paper on energy transition of the electricity market, Germany will continue to be the European single electricity market development under the environment of electricity market. Europe’s power markets to some extent, to offset the volatility of renewable electricity, thus reducing overall system cost and improve operational efficiency. Power markets interconnected environment arising out of international trade will also improve the flexibility of supply.
Allow more electricity providers have entered the market. Germany allows balance and encourage more suppliers to enter the market and compete, thereby ensuring Germany high reliability and quality of electric energy supply and low price. Germany the Federal Network Agency also plans to start procedures to auction rules, so as to ensure that any new, flexible and reliable suppliers are able to compete in the market.
Clear accumulation flexible rules for power users. Germany plans to amend the relevant rules for grid access regulations in order to ensure flexible power users can participate in FM.
Assessment of minimum capacity. Germany the Federal Network Agency will also periodically to assess the thermal power station minimum technical effort, minimum technical effort minimize thermal power units in order to increase thermal power unit load capacity and publish assessment reports every two years. The first assessment report is expected to be released on March 31 this year.
Original title: Germany to deal with renewable abandoned electrical problem