The world’s largest liquid flow “power bank” goes online in October

Dalian flow battery energy storage peak shaving power station combiner substation. Photo courtesy of Dalian Rongke Energy Storage Technology Development Co., Ltd.

On September 29, my country’s 100-megawatt Dalian flow battery energy storage peak-shaving power station entered the final stage of grid-connected debugging. The power station is by far the world’s largest power and largest capacity flow battery energy storage peak-shaving power station, and is expected to be officially put into use in mid-October. The power station is technically supported by the team of Li Xianfeng, a researcher at the Dalian Institute of Chemical Physics, Chinese Academy of Sciences (hereinafter referred to as Dalian Institute of Chemical Physics).

Zhang Tao, vice president of the Chinese Academy of Sciences and academician of the Chinese Academy of Sciences, said that the 100-megawatt flow battery energy storage power station has solved the key scientific and technical problems in the process of industrialization of flow batteries, and made breakthroughs in key materials, core components and systems of flow batteries. Integration and other key core technologies.

Realizing the low-carbon transformation of the energy structure and increasing the proportion of clean and renewable energy use are powerful means to achieve the “dual carbon” goal. However, renewable energy power generation is intermittent and fluctuating. After it is connected to the grid on a large scale, the power system must have a certain ability to adapt and respond. The Dalian flow battery energy storage peak-shaving power station will increase the grid connection rate of renewable energy, balance the stability of the power grid and improve the reliability of the power grid. important meaning.

Li Xianfeng told the “China Science News” that according to the calculation of the daily per capita electricity consumption of Chinese residents at about 2 kWh, after the power station is put into use, it can meet the electricity demand of 200,000 residents for a day.

The power station is equivalent to the city’s “power bank” and plays the role of “shaving peaks and filling valleys” in the entire power system. When the power consumption of the power grid is low, the battery is charged by using renewable energy such as wind energy and solar energy to generate electricity, and the electrical energy is converted into chemical energy and stored in the battery; when the power consumption of the power grid is high, the chemical energy stored in the battery is converted into electrical energy discharge. In addition, it can also cooperate with conventional thermal power, nuclear power and other energy sources to provide auxiliary services such as peak regulation and frequency regulation for the operation of the power system, and improve the flexibility of the power system.

The total construction scale of the power station is 200 MW/800 MWh. The first phase of the power station will be put into use this time. The scale is 100 MW/400 MWh, and the rated power of the power station is 100,000 kWh/ hour, can store up to 400,000 kWh of electricity.

The power station is based on the all-vanadium redox flow battery energy storage technology developed by Dalian Chemical, using vanadium ions of different valences as active materials, based on the oxidation or reduction reaction of vanadium ions in the positive and negative electrolytes, to realize the energy and chemical energy. mutual conversion, thereby realizing large-scale storage and release of electrical energy. The technology has high safety, good reliability, large output power and energy storage capacity, long life, high cost performance, recyclable electrolyte, and environmental friendliness. It has good application prospects in the field of large-scale energy storage.

The power station is designed and manufactured by Dalian Rongke Energy Storage Technology Development Co., Ltd., and Dalian Constant Current Energy Storage Power Station Co., Ltd. is responsible for construction and operation. The Dalian Institute of Chemical Physics team also signed a user-side flow battery technology license agreement with EcoSourcen, a holding company of Belgian Kold Group, realizing the export of my country’s flow battery energy storage technology to developed countries for the first time.

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