On May 31, the 300MW/600MWh Energy Storage Power Station in Gaoyi County, Shijiazhuang—one of Hebei Province’s flagship new energy storage projects—successfully achieved full-capacity grid connection and officially entered a new stage of commercial operation.

Invested and developed by Huiqiao New Energy, the project is equipped with a complete core energy storage system solution provided by Guangzhou Zhiguang Energy Storage Technology Co., Ltd. (“Zhiguang Energy Storage”). The project adds another large-scale green “power bank” to the emerging power system in central and southern Hebei, accelerating the province’s transition toward a low-carbon energy structure.

A Provincial Key Energy Storage Project and Critical Grid Regulation Hub in Central and Southern Hebei

Located in Fucun Town, Gaoyi County, the 300MW/600MWh energy storage power station includes a 220kV booster substation and a full range of supporting facilities. The project represents a significant step for Dalian Sanfeng Group in translating its strategic vision for the new energy storage sector into practical implementation. It is also a provincial-level flagship project supporting Shijiazhuang’s efforts to build a robust smart grid and advance its green and low-carbon energy transition.

As a large-scale grid-side energy storage project in central and southern Hebei, the station integrates four key functions: peak shaving and valley filling, frequency regulation, voltage regulation, emergency backup, and renewable energy integration. Leveraging millisecond-level response capability and high-efficiency, all-weather peak regulation performance, the project will significantly enhance grid flexibility and resilience across the region. It also provides contingency support during grid disturbances, strengthening power system security and serving as a critical stabilizer for regional grid operations.

Advanced Technology at the Core: Zhiguang’s Cascaded High-Voltage Direct-to-Grid Energy Storage System

The project is fully equipped with Zhiguang Energy Storage’s self-developed Cascaded High-Voltage Direct-to-Grid Large-Capacity Energy Storage System.

Built upon more than two decades of expertise in power electronics, this solution is specifically designed for hundreds-of-megawatts and gigawatt-scale energy storage applications, overcoming many of the technical limitations associated with conventional low-voltage energy storage systems.

Key Advantages of the System

· High-Voltage Direct Connection: Eliminates the need for step-up transformers, reducing energy losses and improving overall system efficiency.

· Millisecond-Level Response: Provides rapid support for grid frequency and voltage regulation, enhancing grid flexibility and stability.

· Intrinsic Safety: Multi-layer protection mechanisms ensure safe and reliable long-term operation.

· Compact Footprint and Lower O&M Costs: Well-suited to the large-scale deployment requirements of grid-side energy storage projects.

This technology has already been successfully deployed and validated in multiple hundred-megawatt and gigawatt-scale energy storage projects. The successful grid connection of the Gaoyi project marks a major milestone in Zhiguang Energy Storage’s expansion within northern China’s grid-side energy storage market and further reinforces the company’s industry-leading position in cascaded high-voltage direct-to-grid large-capacity energy storage technology.

Advancing the Dual-Carbon Vision Through Continuous Innovation

The successful full-capacity grid connection of the project would not have been possible without the policy guidance, regulatory support, and approval assistance provided by government authorities and power grid operators at all levels. Zhiguang Energy Storage extends its sincere gratitude to Dalian Sanfeng Group and Huiqiao New Energy for their trust and partnership. The company will continue to provide comprehensive technical support for project operation and maintenance, contributing to the optimization and upgrading of Hebei’s energy structure.

Looking ahead, Zhiguang Energy Storage will continue to leverage its proprietary technology portfolio and integrated industrial-chain advantages to drive the research, development, and innovation of cascaded high-voltage direct-to-grid large-capacity energy storage systems. By continuously improving system performance and reducing lifecycle costs, the company aims to work with more partners to deliver high-quality energy storage projects, support the construction of China’s new power system, and contribute to the steady realization of the nation’s carbon peaking and carbon neutrality goals through advanced energy storage technologies.