Hydrogen energy storage is a new concept put forward after the comprehensive utilization of hydrogen energy in Germany and other European countries in the past two years. “12th Five-Year Plan” has not been established before, support projects are also hydrogen generation, power generation, hydrogen storage and other processes separately funded, but the “13th Five-Year Plan” period of the concept has been included in the National Grid Corporation planning. Hydrogen energy storage technology is considered to be an important support for the large-scale development of smart grid and renewable energy generation, and has increasingly become the focus of energy technology innovation and industry support in many countries.
We will vigorously develop hydrogen energy storage technology, focus on breaking through the key technologies such as high-efficiency conversion, low-cost large-scale storage and comprehensive and efficient utilization of two energy carriers, solve the key technologies such as hydrogen generation of new energy volatility, interconnection and coordinated control of power grid and pipe network, realize large-scale storage of energy network, and realize the large-scale application of high-efficiency and low-cost energy storage technology. To provide technical support for the construction of a global energy Internet with strong configuration capabilities, high safety and reliability, and green and low carbon.
A new way of thinking to solve the problem of “abandoning the wind” and “abandoning the light”
With the rapid increase in the proportion of renewable energy generation in China (according to the latest forecast of the Energy Research Institute of the National Development and Reform Commission: the proportion of renewable energy generation in China’s power structure will increase from 24% in 2015 to 53%) in 2030), there is also a geographical distribution of power generation and load centers (80%-90% of wind on-land resources in the “three north” region, solar energy resources are also in the west and north, and energy centers are located in the middle and east), In view of the increasingly urgent environmental pressure and fossil energy constraints, which have forced China to focus on the generation, storage and consumption of renewable energy, in early 2014, Premier Li Keqiang visited the German hydrogen energy hybrid power generation project, in particular instructing the relevant domestic departments to organize the implementation of hydrogen energy utilization demonstration projects. The State Energy Administration has instructed Hebei and Jilin provinces to speed up the demonstration of hydrogen generation from renewable sources, and to list hydrogen storage as a new way of thinking to solve the problem of “abandoning wind” and “abandoning light”. In the two months of early 2015, the State Energy Administration again issued a series of circulars related to wind power consumption (“National Energy Administration on doing a good job in 2015 wind power grid-related work”, “National Energy Administration on the implementation of renewable energy clean heating demonstration in Beijing related requirements”, “National Energy Administration Integrated Division on the further development of renewable energy “13th Five-Year Plan” guidance”), renewable energy consumption work is imminent.
To this end, State Grid Corporation has also carried out the key technology of hydrogen energy storage and its pre-application research in new energy access, actively built an experimental research platform for hydrogen energy storage system, broke through the adaptability of the volatile new energy electrolyte hydrogen technology, has the efficiency testing capability of hydrogen storage system, and provides a theoretical basis for the key technology research and application of hydrogen generation in large-scale renewable energy in the future.
Hydrogen energy storage can be regarded as an extension of chemical energy storage, the basic principle is to hydrolysect hydrogen and oxygen. In the case of wind power hydrogen storage technology, the core idea is to use wind power to delineate hydropower into hydrogen (and oxygen) when there is sufficient power but not access to the Internet and when wind is needed to store hydrogen, and when electricity is needed, to convert the stored hydrogen into electricity transmission networks in different ways (internal combustion engines, fuel cells, or other means).
The hydrogen energy storage system usually referred to is the electro-hydrogen-electric cycle and is different from conventional lithium batteries and lead-acid batteries. The electrolyzed water link at the front end, which is calculated by power (kW), represents the “charge” power of the hydrogen energy storage system, the fuel cell link at the rear end also calculates the capacity by power (kW), represents the “discharge” power of the hydrogen storage system, and the hydrogen storage link in the middle, The volume of hydrogen (standard cubic meter Nm3) computational capacity, if converted into electrical capacity, 1Nm3 hydrogen can produce about 1.25 kWh of electricity, the capacity of the hydrogen storage link determines the hydrogen storage system sustainable “charge” or “discharge.” “The length of time, so if you want to increase the storage capacity of electrical energy, increase the volume or pressure of the hydrogen tank.” If hydrogen energy storage technology is used in the field of energy storage