SOLUTIONS
SOLUTIONS

SOLUTIONS

Power grid peak-shaving and frequency-regulation scenarios

 

Core positioning:

The core equipment for the power grid's "peak-shaving and valley-filling, ensuring safety and stability," which replaces part of the investment in upgrading transmission and distribution lines, thereby enhancing the grid's ability to integrate new energy sources and improving its operational stability.
 

Technology and Value Deepening (Solution Details):

Multidimensional Functional Solutions:

It shoulders the triple responsibilities of "peak shaving and valley filling + emergency backup + power quality management" for the grid. During peak load periods—such as 2:00 PM to 6:00 PM in summer and 6:00 PM to 10:00 PM in winter—it releases stored energy to ease the pressure on grid supply. Meanwhile, during off-peak hours—like midnight to 6:00 AM—it absorbs surplus electricity from the grid, helping to prevent wind and solar energy curtailment. Additionally, it serves as an emergency backup power source for the grid, quickly stepping in to restore power supply in case of transmission line failures, thereby ensuring reliable electricity for critical loads. Take a provincial-level grid in East China as an example: after deploying a 200 MW/400 MWh energy storage system, the grid can shift 800 GWh of peak load annually. This effectively reduces the need to build one additional 500 kV substation and delays investment in transmission and distribution infrastructure by more than 200 million yuan.

 

Hardware Design Solution:

Using containerized liquid-cooled energy storage cabinets with a single-cabinet capacity of 5 MWh, each cabinet integrates battery modules, a liquid-cooling system, a fire protection system, a PCS unit, and monitoring modules inside. The cabinets feature an IP54 protection rating, enabling stable operation in ambient temperatures ranging from -30°C to 60°C. Thanks to the "independent fire protection per cabinet + physical isolation" design, each cabinet is equipped with standalone smoke and temperature sensors, along with automatic extinguishing devices such as a perfluorohexanone-based automatic fire suppression system. This ensures that if one cabinet malfunctions, it can be swiftly isolated, effectively preventing fire spread and significantly enhancing the overall system safety. Additionally, the system supports multi-cabinet parallel connections up to GW-level capacity, perfectly meeting the demands of large-scale grid peak-shaving applications.

 

Revenue Operation Plan:

Deeply involved in electricity spot market trading, in pilot regions such as Guangdong and Shandong, the company leverages a combined revenue model of "peak-valley price arbitrage + ancillary services (frequency regulation, reserve capacity) + capacity leasing," achieving an IRR (internal rate of return) of 12%–15%. This significantly outperforms the approximately 8% IRR typically seen in pumped hydro storage projects. Meanwhile, energy storage projects can be completed in just 6 to 8 months—far shorter than the 5- to 8-year construction period required for pumped hydro storage—allowing for rapid commissioning and revenue generation, thereby substantially reducing risks associated with the investment payback timeline.