Steel + new energy storage, this set of string energy storage power stations has been running for more than 10,000 hours!

The Nanjing Nangang 61MW/123MWh Energy Storage Power Station (hereinafter referred to as "Nangang Energy Storage Power Station"), built in Nanjing Iron and Steel Group and invested by Three Gorges Electric Power and assisted by Lingchu Yuneng, has recently reached a milestone.

Since the full capacity grid connection in January 2024, the power station has been in continuous and stable operation for more than 10,000 hours, and has cumulatively transferred more than 100 million kWh of peak power load. With solid and reliable actual implementation results, it has saved a lot of electricity expenses, maximized the economic benefits of peak-shaving and valley-filling of energy storage power stations, and taken into account the improvement of regional energy storage station utilization. At the same time, it has realized the functions of participating in demand response, delaying power system transformation and upgrading, and participating in power auxiliary services.

It is worth mentioning that the system efficiency of Nangang Energy Storage Power Station is as high as 90.29% certified by the third-party authoritative testing agency State Grid Electric Power Research Institute. This data not only refreshes the industry's understanding of the economic efficiency of industrial and commercial energy storage, but also makes the Nangang Energy Storage Power Station built with the help of Lingchu Yuneng a benchmark case for the deep integration of traditional heavy industry and new energy technology.

Three Gorges Electric Power, the investor and builder of the Nangang Energy Storage Power Station project, said that the operation results of the Nangang Energy Storage Power Station are good. The project dynamically responds to the peak-shaving needs of the user side, making the "source" and "load" further matched. Lingchu Yuneng follows up the whole process from scheme design to operation and maintenance support, and truly integrates the energy storage system into the production process. The long-term operation with high efficiency, stability and high utilization rate maximizes the investment income of "energy storage + steel".

How is the high efficiency of 90%+ "refined"? This is due to Lingchu Yuneng's deep optimization of the technical architecture, which can be seen in the ingenuity of project design.

At the technical architecture level, a string solution is adopted. The energy storage cabinet adopts a "one cluster one management" design scheme, breaking through the shackles of traditional centralized solutions and eliminating the impact of circulation; the thermal management system adopts a flexible intelligent thermal management heat dissipation strategy, which can intelligently output cooling capacity according to the battery cell, ambient temperature, and operating conditions. The daily energy consumption of the liquid cooling unit can be reduced to 45.91kWh; 3S full-stack self-developed capabilities enable the system to respond harmoniously. The independently developed energy management system (EMS) predicts production loads in real time through AI algorithms, dynamically optimizes charging and discharging strategies, and realizes the coordinated control of "peak shaving and valley filling" and transformer overload protection, and enhances power supply reliability.

At the project design level, in order to further improve system efficiency, photovoltaic panels are installed on each energy storage cabinet to support station power through photovoltaic power generation, and photovoltaic panels and small fans are also installed on each street lamp that can be seen everywhere at the site. Through the power supply of new energy, the power loss of the station is reduced to the best of its ability and the system operation efficiency is improved.

In response to the extreme safety demands of steel enterprises, a comprehensive safety system is built by adopting the fire protection mechanism of "three-level fire protection + five-level fuse", active safety measures such as "cluster-level thermal management + intelligent monitoring", and passive safety measures such as fault isolation. Taking precautions before they happen, combined with the local deployment of the AI ​​big model, the energy storage cabinet can achieve thermal runaway safety warning more than 2 months in advance, and can detect internal micro short circuits with a detection accuracy of more than 95%.

At the same time, the project has realized the development of the battery health big data analysis module, which can apply big data analysis technology to battery health management, realize the observable and measurable real-time status of each battery cell in the energy storage power station, and achieve 0.3-second abnormal response and 97% life prediction accuracy.

As the first 100-megawatt-hour string user-side energy storage project in China, the Nangang Energy Storage Power Station has verified the large-scale application potential of this technical route. The string energy storage system deployed at the industrial and commercial user end is flexible in configuration and close to the actual needs of users. The modular design allows enterprises to expand capacity in stages according to demand, avoiding one-time heavy asset investment. The liquid cooling system effectively improves the charging and discharging efficiency, and the discharge volume over the entire life cycle is 4%-5% higher than that of the centralized solution.

The results of implementation are not limited to the Nangang Energy Storage Power Station. According to the data of Gaogong Industry Research Institute (GGII), in 2024, with a total installed capacity of more than 1GWh, it will rank among the top two in terms of string energy storage system shipments and the top ten in terms of industrial and commercial energy storage system integration, and successively implement benchmark projects such as Meigang 50MW/100MWh Energy Storage Power Station and Binhai 200MW/400MWh Independent Shared Energy Storage Power Station.

Among them, the Meigang project uses 252 Ocean 400L liquid-cooled energy storage cabinets, with a first-year profit of 32.8 million yuan; the Binhai project is the largest string-type grid-side energy storage power station at present, with 1,080 energy storage cabinets participating in the peak and frequency regulation of the grid, and as an independent shared energy storage power station, it helps the owner to improve the new energy consumption capacity.

Based on the string energy storage solution and relying on the "modular product + intelligent management" model, it helps customers reshape the new paradigm of industrial energy management. Looking to the future, the company will be committed to becoming the "energy partner" of customers, providing full-chain services from energy supply to carbon asset management for high-energy-consuming industries such as steel, supporting more owners to move towards low-carbon production, and contributing wisdom and strength to the green transformation of industry.