1. Safe grid connection of renewable energy generation such as wind power
and photovoltaic power
The inherent randomness, intermittency, and volatility of wind power
generation determine that its large-scale development will inevitably have a
significant impact on the safe operation of the power system. With the rapid
development of the wind power industry, especially in China where most wind
farms belong to large-scale centralized development and long-distance
transmission, the grid connected power generation of large wind farms poses a
serious challenge to the operation and control of the large power grid.
Photovoltaic power generation is influenced by environmental temperature,
sunlight intensity, and weather conditions, and exhibits a random fluctuation
characteristic. Therefore, high-capacity energy storage products have become a
key factor in solving the contradiction between the power grid and renewable
energy generation. The lithium iron phosphate battery energy storage system has
the characteristics of fast working condition conversion, flexible operation
mode, high efficiency, safety and environmental protection, and strong
scalability. It has been applied in the national wind and solar energy storage
and transmission demonstration project, which will effectively improve equipment
efficiency, solve local voltage control problems, improve the reliability of
renewable energy generation, and improve power quality, making renewable energy
a continuous and stable power supply.
With the continuous expansion of capacity and scale, and the continuous
maturity of integrated technology, the cost of energy storage systems will be
further reduced. After long-term testing of safety and reliability, lithium iron
phosphate battery energy storage systems are expected to be widely used in the
safe grid connection and improvement of power quality of renewable energy
generation such as wind power and photovoltaic power.
2. Peak shaving of the power grid
The main means of peak load regulation in the power grid has always been
pumped storage power stations. Due to the need to build two reservoirs, the
upper and lower, for pumped storage power stations, which are greatly limited by
geographical conditions, it is not easy to build in plain areas, and the land
area is large, resulting in high maintenance costs. The use of lithium iron
phosphate battery energy storage systems to replace pumped storage power
stations can cope with peak loads in the power grid, without being limited by
geographical conditions, with free site selection, less investment, less land
occupation, and low maintenance costs. It will play an important role in the
peak shaving process of the power grid.
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