Successful Grid Connection of Hebei’s Largest Shared Energy Storage Project
Date: 03 Dec 2024 |
Source: Global Flow Battery Energy Storage WeChat, 3 December 2024
The shared energy storage power station project in Chengde Weichang, Hebei Province, China, designed, built, and operated by Bejing Tianqi Hongyuan New Energy Technology Co., Ltd. successfully achieved its initial grid connection. This marks the integration of the largest shared energy storage facility in Hebei into the power grid, providing a significant boost to renewable energy storage in the Weichang region.
Project Overview
The Chengde Weichang Shared Energy Storage Station, officially approved for development in 2023, represents a major step forward in renewable energy infrastructure. Construction commenced earlier this year in partnership with South Network Energy Storage and is led by the general contractor, China State Construction Fifth Bureau Power Energy Co., Ltd. Tianqi Hongyuan is the project’s energy storage equipment designer, with Jiangsu Tongqi New Energy Co., Ltd. acting as the system integrator.
Located in Weichang Manchu, Mongolian Autonomous County, Hebei Province, the facility comprises a 355MW/920MWh storage station, a 220kV step-up substation, and associated facilities. It connects to the Pailou 500kV substation via external transmission lines.
Technological Innovations
The project features an advanced design utilizing both lithium iron phosphate (305MW/720MWh) and vanadium redox flow battery technology (50MW/200MWh). These technologies prioritize grid flexibility, safety, and reliability, making the project a national leader in energy storage innovation.
Key advancements include:
- Core Patent Technologies: Enhancements to the system's performance and reliability.
- Battery Optimization: Decoupling weak battery clusters via plug-in optimizer technology, maximizing cell capacity.
- Thermal Management: Unique 1P64 PACK design ensures a temperature variance of no more than 3°C across battery clusters, improving efficiency and uniformity.
- Balance Technology: Active 10A balancing across 400 cells, enhancing stability.
- Advanced AI Scheduling: Real-time state monitoring and optimization using EMS with cutting-edge temporal AI algorithms, extending system life to match individual battery design life.
These innovations enable the system to provide primary and secondary frequency regulation, black-start capability, and peak shaving, ensuring robust support for grid stability.
Economic and Environmental Benefits
The project serves 13 major renewable initiatives, including wind, solar, and integrated hydrogen storage projects in Weichang. The centralized shared storage model facilitates cost-effective operations, with capacity leasing agreements already signed with medium and large enterprises. This approach aligns with both renewable energy consumption needs and grid support requirements, allowing operators to adopt sophisticated strategies for maximizing returns.
Post-grid connection, the energy storage station is expected to significantly enhance local grid peak-shaving capabilities, stabilize the power network, and support the adoption of clean energy. The project will contribute to optimizing the regional energy structure and achieving carbon peaking and neutrality goals.