Analysis of the role of energy storage in energy internet

China Energy Storage Network News: Energy Internet realizes the close integration of energy networks such as power grid, gas grid, heat grid, and transportation grid through the mutual conversion and complementarity of various energy sources such as electrical energy, thermal energy, and chemical energy. Renewable energy generation, multi-energy cogeneration technology, and energy storage technology are the key to achieving the integration of the above physical systems. Xiaozhi team will analyze the role of energy storage technology in energy Internet based on its characteristics.

Global energy development has experienced an evolution from the firewood era to the coal era, and then to the oil and gas era and the electricity era. The modern energy industry is a technology-intensive industry, and technological innovation plays a decisive and fundamental role in energy upgrading and development. As a new energy technology revolution, the energy Internet must play the leading and driving role of technological innovation, increase research and development efforts, realize clean energy power generation as soon as possible, better support the construction of the global energy Internet, and ensure the sustainable supply of world energy.

Energy storage technologies include electrochemical energy storage, compressed air energy storage, heat storage, hydrogen storage, etc. They establish coupling relationships between multiple energy sources and are an indispensable component in the construction of smart grids and energy Internet, playing an important role in energy transfer, matching and optimization. In the energy Internet, the access of large-scale volatile and intermittent renewable energy generation increases the uncertainty of power supply measurement and the risk caused by power imbalance in the power grid. Configuring energy storage in smart grids and energy Internet has the following functions:

Supporting the operation of power grids with a high proportion of renewable energy generation

Renewable energy generation is currently in a rapid growth stage nationwide. The access of large-scale fluctuating and intermittent renewable energy generation increases the uncertainty on the power supply side and the risk caused by power imbalance in the power grid. For the access of large-scale renewable energy generation, on the one hand, the randomness can be reduced and its adjustability can be improved by combining energy storage technology with renewable energy generation; on the other hand, the adaptability of the grid to renewable energy generation can be enhanced through grid-level energy storage applications.

Improving the flexibility and adjustability of multi-energy systems

There are multiple energy flows that are mutually coupled and influence each other in the energy Internet. In order to support the flexibility and reliability of the multi-energy system, energy storage is needed to weaken the strong correlation and close coupling relationship between multiple energy sources. The technical type and time scale of energy storage must match the system's energy supply needs and the technical characteristics of the conversion elements.

Improving the freedom of energy trading

In the energy internet, the traditional energy trading model will change. Both energy producers and consumers will participate in market competition, and as trading entities, the roles of producers and consumers can be interchangeable. For large energy suppliers, the "inventory" capacity of large-scale energy storage can be used to influence changes in market prices and promote the rational allocation and layout of resources. At the same time, distributed energy storage gives users the right to freely choose to participate in or exit the market. The existence of energy storage also provides users with the possibility of participating in energy trading.

To adapt to the development of future energy, clean energy such as hydropower, wind power, and solar energy are accelerating their development and utilization. Energy Internet will play an increasingly important role in ensuring the world's energy supply and promoting clean energy development. Energy storage technology is the key to ensuring the large-scale development of clean energy and the safe and economical operation of power grids. Energy storage technology can add storage links to the power system, making the "rigid" power system with real-time power balance more "flexible", especially smoothing the volatility caused by the large-scale clean energy generation connected to the power grid, and improving the safety, economy and flexibility of power grid operation.