On September 21, a delegation led by Ding Zhijun, Deputy Director-General of the Department of Energy Conservation and Comprehensive Utilization of the Ministry of Industry and Information Technology (MIIT), visited Guangzhou Zhiguang Energy Storage Technology Co., Ltd. (“Zhiguang Energy Storage”) for a research and exchange session. Officials and experts from the Guangdong Provincial Department of Industry and Information Technology, Guangzhou Municipal Bureau of Industry and Information Technology, and Huangpu District Bureau of Industry and Information Technology accompanied the delegation. Jiang Xinyu, President of Guangzhou Zhiguang Electric Co., Ltd., together with the company’s core management team, warmly welcomed the delegation.
The delegation first visited the company’s exhibition hall, where Mr. Jiang Xinyu delivered a presentation on the company’s new energy business, focusing on two core technology achievements: the Cascaded High-Voltage Direct-Connected Large-Capacity Energy Storage System and the Coota Solid-State Transformer (SST). He introduced the company’s breakthroughs in technological innovation, progress and results in project implementation, and industrialization, while also sharing Zhiguang’s practical experience in green and low-carbon transformation, as well as its needs and perspectives regarding equipment demonstration and deployment and coordinated development across the industrial chain.
The Cascaded High-Voltage Direct-Connected Energy Storage System is a key piece of equipment supporting the high-quality development of large-capacity new energy storage and aligns with national policy initiatives to promote the large-scale deployment of new energy storage.
Featuring a cascaded H-bridge topology, the system enables direct grid connection at voltage levels from 6 kV to 35 kV without a step-up transformer, while eliminating circulating currents between battery clusters. It provides key capabilities including grid-forming support, millisecond-level response, and one-click black start, with system conversion efficiency exceeding 92%, significantly outperforming conventional solutions. The system has been deployed on a large scale in applications including standalone energy storage, renewable energy integration, and integrated source-grid-load-storage systems, providing robust technical support for the stable operation of power grids with high penetration of renewable energy.
As a core “energy router” for the new power system, the Solid-State Transformer (SST) is designed for applications including AI computing centers, high-power fast-charging infrastructure, and integrated solar-storage-charging systems. It enables flexible interconnection between power grids and flexible multi-port access, making it a key technology for upgrading charging infrastructure and supporting Guangzhou’s development as a “Supercharging City.”
Together, these two technologies form a dual-engine development model in the fields of large-capacity energy storage grid integration and flexible power conversion, jointly supporting industrial green and low-carbon development and the construction of the new power system.
The delegation gained an in-depth understanding of Zhiguang’s achievements in the research and development of key equipment for the new power system and in technological innovation for green and low-carbon development. Particular attention was given to the value of these two key new-power-system technologies in enhancing grid security and improving energy utilization efficiency.
The delegation subsequently visited the energy storage production line and the solid-state transformer demonstration site. They observed the full manufacturing process of the Cascaded High-Voltage Direct-Connected Energy Storage System and the construction of the SST demonstration project, and inspected physical hardware prototypes of both technologies. The delegation also learned in detail about the equipment’s performance specifications and manufacturing processes.
The two sides exchanged views on the grid-forming capabilities and high-efficiency, high-reliability characteristics of the Cascaded High-Voltage Direct-Connected Energy Storage System, as well as the multi-port flexible access, high-power fast-charging compatibility, and industrialization prospects of the Solid-State Transformer.
The research visit established an important communication channel between the company and national industrial policy authorities. As a leading local enterprise in power electronics and integrated energy services in Guangzhou, Zhiguang Energy Storage will continue to implement national strategies and initiatives for green and low-carbon development and the construction of the new power system. The company will further strengthen innovation in core equipment technologies, deepen collaboration among industry, academia, research institutions, and end users, accelerate the large-scale deployment of demonstration projects, and promote coordinated development across the upstream and downstream industrial chains, contributing to the green and low-carbon transformation of industry.
