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"The renewable energy development today, the next technical focus is to find a can achieve both field-level energy storage and cost-controllable technology with the emergence of cheap high-power energy storage technology, the energy storage device and the wind , Optical equipment, may be a more economical and better way. "Liu Shi, professor at North China Electric Power University, accepted the second IET International Conference on Renewable Energy Production on September 9 (British Society of Engineering and Technology) Interview with reporters said.
With the expansion of China's renewable energy power generation, the market for energy storage equipment in conjunction with the development of the rapid development momentum. According to the person in charge of a domestic investment agency, over one-third of the U.S. dollar funds in the country have been stationed in energy storage and energy storage related industries. Energy storage is becoming a hot spot for investment in the new energy sector, and it will also backfill the new energy equipment market.
Energy storage equipment and new energy development simultaneously
As an emerging strategic industry, energy storage industry has been listed in the "12th Five-Year Plan" framework of China. The emphasis of energy saving in the framework is to rely on technologies that promote the construction of smart grids, strengthen the construction of urban and rural power grids and enhance the optimal allocation of power grids. At present, the National Development and Reform Commission, the Energy Bureau, the Ministry of Industry and Information Technology and other departments have started to brew a number of policies in the field of energy storage, boosting clean energy development and increasing support for the energy storage industry.
The release of policy signals has opened a window for the development of energy storage industry. For China's energy storage market, the first phase of energy storage and new energy development at this stage should be carried out simultaneously. Large-scale wind power, photovoltaic grid-connected and distributed energy are the largest demand side for energy storage. With the expansion of installed capacity of new energy sources, energy storage devices are installed for wind power and photovoltaic equipment and new energy sources are stored in order to get rid of them The long embarrassment of eating by the sky.
In fact, some wind turbine manufacturers are developing wind power storage technology, which can drive the further development of the entire wind power industry and even the entire new energy industry, so as to make better and more efficient use of new energy that is temporarily unable to be comprehensively utilized. Photovoltaic inverter companies are also studying the installation of energy storage devices for inverters, to ensure grid-connected power generation and to make the grid operate stably and to achieve the on-site consumption of photovoltaic resources.
In terms of market, there are certain investment opportunities for energy storage technology in the construction of smart grid. Different energy storage technologies have different technical maturity, application fields and industrialization processes. The main market opportunities are concentrated on pumping Energy storage, compressed air energy storage, nickel-hydrogen battery, lithium-ion battery and so on. According to Assistant Director of Engineering Thermophysics Institute of Chinese Academy of Sciences, Erdos large-scale energy storage technology research institute director Tan Chunqing is expected to 2020, the domestic energy storage industry, the market size of at least up to 600 billion yuan.
Economic development is still the constraints of energy storage equipment
"We are actively exploring a cheap energy storage path, both large-scale application and economical energy storage equipment, is the key to the development of the energy storage industry in the future." Liu Shi said.
In recent years, the existing energy storage device in our country is in the demonstration stage and has not yet embarked on a commercial road. After all, is its economic problems. According to China Electric Power Research Institute on Zhangbei scenery storage and transportation demonstration project estimates, 20 megawatts of energy storage battery design investment reached 400 million yuan, if all of our existing wind power installed capacity of all equipped with energy storage devices need a one-time investment 2000 This is far more than the economic losses of nearly 10 billion yuan each year caused by abandoning the wind in our country.
This huge investment, equipment manufacturers apparently unable to afford. However, with the constant increase of new energy power generation, it has not given up exploring the development path of low-cost energy storage equipment. At present, China's energy storage technology presents a variety of routes. According to incomplete statistics, energy storage has more than 10 different technical routes depending on the needs in different fields. However, China's energy storage-related enterprise lead-acid battery manufacturers, lithium battery manufacturers, inverter manufacturers and control of some key materials manufacturers are relatively mature, in addition to other energy storage equipment manufacturers did not form a scale.
China EPRI electrician , director of a well-off had pointed to an interview, to reduce storage costs, first to break the security of energy storage battery, cycle life and other technical problems. The breakthrough of these technologies is the premise of energy storage to achieve industrialization. Most of the domestic battery companies start from the OEM, even if the scale of energy storage is difficult to really benefit. To open the downstream energy storage space, it is necessary to increase R & D investment along the direction of high safety, long life and low cost.
China's energy storage industry promotion challenges
In recent years, the development of energy storage devices has added a "salary fire" to the development of new energy power generation, grid connection, and smart grid and distributed microgrid. However, due to our country is in the initial stage of energy storage development, technology is not yet mature, large-scale energy storage is difficult to promote.
Relative to the developed countries, China's energy storage started late, the market awareness is low, a variety of energy storage technologies, the majority of enterprises there is the blind use and selection. For example, the earliest energy storage equipment was pumped storage, with high power and rapid regulation of water energy, but was susceptible to uneven spatial distribution of water resources. At present, compressed air storage, which is of great concern, has the potential of large-scale application but at a high cost. In addition, the popular lead-acid batteries, but also in the storage time and life expectancy to be improved. These are the performance immature technologies and energy storage devices.
In fact, the application of energy storage device in power system is short. Currently in the power grid system in the demonstration project stage. Due to the high reliability requirements of power grids, it has traditionally required at least 5 years of reliability testing and trial to pass the minimum standards of power users. Therefore, the grid system and the user's maturity of energy storage devices will exist inspection period.
In addition, the economic challenges that have long been recognized as a major obstacle to energy storage promotion have also not been addressed. The root cause of energy storage economy lies in the lack of research and development technology of key materials for storage batteries, which leads to the high cost of energy storage batteries. Core materials are heavily dependent on imports, energy storage devices inevitably expensive.
It is not difficult to see that in the short term, China's large-scale energy storage is facing many challenges. How to achieve industrialization as soon as possible, some industry sources said that from the national level, increase investment in energy storage R & D, the introduction of the corresponding preferential policies, the establishment of subsidies, to develop a clear long-term industrial development plan; relevant research institutions and enterprises should pay attention to Research and development of key technologies for energy storage materials and strengthen basic research on energy storage technologies.
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