Recently, Professor Zhou Jinghua from the School of Energy Storage Science and Engineering, NCUT as the first unitl leaded and compiled the group standard Technical Specification for Grid-Connection Performance Testing of Grid-Forming Energy Storage Converters in Electrochemical Energy Storage Systems (T/CPSS1015—2025). The group standard has passed the review by the Group Standard Working Leading Group of the China Power Supply Society. It was officially released on August 22, 2025, and came into effect on August 23, 2025.

Driven by the "dual carbon" goals, China's energy structure is accelerating its transition to green and low-carbon, with the penetration rate of renewable energy increasing year by year. Grid-forming energy storage converters are key equipment for enhancing grid strength and improving renewable energy absorption capacity. In practical applications, the lack of standards for testing the grid-forming capability of grid-forming energy storage converters has hindered the industrial application of grid-forming equipment. This standard focuses on the grid-connection performance testing of grid-forming energy storage converters in electrochemical energy storage systems, and systematically proposes a set of scientific, comprehensive and operable testing methods, filling the gap in domestic standards for grid-connection testing of grid-forming energy storage converters. The standard mainly covers a number of core technical testing contents under the grid-forming operation mode, including testing items such as output frequency change rate, active voltage/frequency support, inertia time constant, power regulation performance, phase angle mutation tolerance, power quality management, grid-connected/off-grid switching, grid strength adaptability and fault ride-through, covering a variety of typical grid operating conditions.

During the formulation of the standard, the compiling group, in collaboration with 15 domestic leading enterprises in new energy and energy storage, extensively incorporated relevant domestic and international standards as well as cutting-edge research findings. Closely aligning with the operational characteristics of China's power system and the development needs of energy storage technology, the group defined requirements for testing conditions, testing procedures, data processing, and result determination, thereby ensuring the scientific validity, authority, and comparability of test results.

The release and implementation of this standard will effectively standardize the testing procedures and evaluation system for grid-forming energy storage converters, and clearly quantify the key technical indicators of grid-forming capability. It demonstrates our university’s research strength and industry influence in the fields of power electronics and energy storage power conversion, provides key technical support for China to build a safe, stable, and green new power system, and promotes the alignment of domestic energy storage testing standards with international ones.