Energy storage technology is an important part of the smart grid and one of the key supporting technologies for the smart grid. The development prospects of the energy storage industry in my country are as follows: pumped storage power plants have entered the peak period, the power battery market has continued to expand, the energy storage technology applied to the power grid has developed rapidly, and the development of large-capacity batteries has progressed.
Now, the scale of new energy power generation is rapidly expanding, the use of new energy vehicles is popularising, and the construction of smart grids is rapidly heating up. The development prospects of related energy storage technologies and equipment are unanimously optimistic.
1.1 The application of energy storage technology is conducive to optimising system energy management, improving system efficiency and equipment utilisation.
The load of the power system changes periodically between daytime peaks and late-night troughs, and the load peak-to-valley difference can reach 30% to 40% of the maximum power output, and it has been increasing in recent years. This peak-valley difference causes certain difficulties for power generation and power dispatch. Most of the current power shortages occur during the summer peak load period. If the power system can store electric energy on a large scale, i.e. store the electric energy during the low-load period at night and release it during the daytime peak load period, it can alleviate the power shortage to some extent, reduce the peak-to-valley difference, and improve the system efficiency and utilisation of power transmission and distribution facilities, delaying the construction of new generating units and transmission lines.
1.2 Energy storage is conducive to increasing the reserve capacity of the system, improving the safety and stability of the power system and power quality, realizing energy conservation and improving comprehensive benefits.
In the event of disturbances, voltage dips, short interruptions, short circuits and other accidents in the power system, the energy storage device can immediately absorb or release energy so that the adjustment devices in the system have time to adjust, avoid system instability and ensure high quality power supply. When the system is without power due to a fault, the energy storage device can play the role of a large uninterruptible power supply (UPS) to avoid the loss caused by a sudden power failure and improve the overall economic benefits.
