On May 16, at 8:40 PM, the first phase of the 2×200MWh independent shared energy storage project by Shandong Energy New Energy Group successfully connected to the grid. This milestone marks the official operation of the largest single-unit energy storage system in China, featuring a hundred megawatt high-voltage cascade advanced energy storage system. The project represents a significant step forward in the large-scale development of innovative energy storage by Shandong Energy Group, providing a substantial boost to the construction of a new power system and the promotion of green energy transformation.
The energy storage station functions not only as a “super battery” but also as a “large stabilizer.” It quickly stores energy during off-peak periods and discharges it accurately during peak times, enhancing the stability of the power system. The total planned capacity of the Dongying independent shared energy storage project is 200MW/400MWh, with the first phase connected to the grid at 100MW/200MWh. The project serves multiple functions, including grid peak shaving and valley filling, frequency regulation, and efficient integration of renewable energy. It is expected to generate over 70 million kilowatt-hours of green electricity annually for surrounding renewable energy sites, while reducing carbon dioxide emissions by approximately 70,000 tons, thereby providing solid support for the large-scale integration of clean energy.
Reportedly, the project utilizes a 35kV high-voltage cascade technology and an intelligent energy storage system developed independently by Shandong Energy New Energy Group. This includes four sets of 25MW/53.6MWh lithium iron phosphate battery systems, using 314Ah battery cells adapted to a 104-series liquid-cooled battery pack, characterized by high efficiency and performance. The system employs liquid cooling for heat dissipation and incorporates a four-level safety protection design (cell, module, battery cluster, system), ensuring safety management throughout the entire lifecycle. The overall system utilizes a 35kV high-voltage cascade solution, innovatively applying advanced technologies such as AI-driven battery health monitoring, setting a technical benchmark for energy storage demonstration projects in Shandong Province.
The successful grid connection of the Dongying hundred-megawatt energy storage project represents an important practice for Shandong Energy New Energy Group in implementing its “dual carbon” strategy and accelerating green transformation. Moving forward, the group will leverage its advantages in independently developed equipment and system integration to build a comprehensive “R&D-manufacturing-application” ecosystem, driving the upgrade of its energy storage industry and green transformation, and providing an innovative model for the large-scale development of energy storage in Shandong Province.
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