①Change the energy structure, reduce system fuel consumption and save energy
The power industry is currently developing rapidly. The main problem in the operation of the power system is the power supply contradiction caused by the unreasonable power supply structure, especially in some power grids dominated by thermal power, due to the lack of peaking balance means, the contradiction of the power grid peaking is very prominent. The battery energy storage power station plays the role of valley filling during the low load period of the power system, generates power during the peak load period of the system, and provides peak power to the grid, which can effectively reduce the peak-valley difference of the system. When the power grid lacks peak-shaving power, the construction of appropriate battery energy storage power stations can reduce the installed capacity of thermal power or other types of power sources, optimize the power structure of the system, and save system investment and operating costs. For thermal power, the commissioning of battery energy storage power stations can make reasonable adjustments to the grid load, so that thermal power units that undertake peak shaving tasks can more bear the base load and waist load of the system, thereby reducing coal consumption and reducing coal combustion. Pollution to the environment; for hydropower, the investment in battery energy storage power stations can reduce the waste water during the low period of the hydropower flood season and improve the utilization rate of water energy; for nuclear power, the supporting operation of battery energy storage power stations can ensure the safety and economy of nuclear power , Stable operation, improve its energy efficiency.

② Give full play to advantages and promote the development of wind power industrialization
China will focus on the construction of five major energy projects, including renewable energy industrialization projects, focusing on the development of wind energy, solar energy and other renewable energy sources with great resource potential and basically mature technologies, and large-scale construction will drive the development of industrialization. Because wind energy and solar power generation have the characteristics of renewable and pollution-free, they are considered to be ideal clean energy and have promising development prospects.

With the in-depth implementation of renewable energy power generation incentive policies and the rapid development of renewable energy power generation technology, wind power is developing rapidly in China, and the capacity of wind turbines continues to increase. More and more large and medium-sized wind farms have been built and invested. Grid operation. The direct input of a large proportion of wind power into the grid will bring potential risks to the safe and stable operation of the grid. The main reason is that the natural wind speed has the obvious characteristics of randomness, intermittentness and seasonality, and the output power of grid-connected wind turbines mainly depends on the natural wind speed. Therefore, the increase in the proportion of wind power will increase the peak and frequency regulation pressure of the grid. Secondly, when the wind speed and the output power of the wind With the in-depth implementation of renewable energy power generation incentive policies and the rapid development of renewable energy power generation technology, wind power is developing rapidly in China, and the capacity of wind turbines continues to increase. More and more large and medium-sized wind farms have been built and invested. Grid operation. The direct input of a large proportion of wind power into the grid will bring potential risks to the safe and stable operation of the grid. Mainly due to the obvious characteristics of randomness, intermittentness and seasonality of natural wind speed, and the output power of grid-connected wind turbines mainly depends on natural wind speed, so the increase in the proportion of wind power will increase the peak and frequency regulation pressure of the grid. Secondly, when the wind speed and the output power of the wind turbine change, it will cause the voltage fluctuation of the wind farm bus and the nearby power grid. When the wind turbine is connected to the grid and disconnected from the grid, it may also cause an impact on the nearby power grid voltage and affect the power supply quality of the power grid.

It is obviously not advisable to limit the proportion of wind power in the grid. The best way is to use an energy storage system to indirectly input or store wind power into the grid, and to supply power to the grid stably when the grid needs it. The battery energy storage power station has fast response to grid load changes, flexible adjustment, peak shaving, valley filling, frequency modulation, phase modulation and accident reserve operation performance; large energy storage and conversion capacity; mature construction technology; low forced outage rate , It has the advantages of safe and reliable operation, good stability, and high power supply quality. Therefore, the battery energy storage power station can convert the excessively large proportion of wind power into high-quality electric energy and indirectly input the power grid, or convert the excess power of wind power generation when the grid load is low, into chemical energy and store it, reducing wind turbine abandonment, thereby greatly improving It improves the utilization rate of wind energy and the quality of power supply of the power grid, maximizes the development and utilization of wind energy resources, and promotes the industrialization of wind power generation.