On December 26-27, 2024, the final of the Third National Advanced Energy Storage Technology Innovation Challenge organized by the Ministry of Industry and Information Technology of China (MIIT) took place in Liyang, Jiangsu Province. Guangzhou Zhiguang Electric Technology Co., Ltd., in collaboration with China Electric Power Research Institute, Yunnan Electric Power Testing & Research Institute (Group) Co., declared the product New Energy Storage Grid-connected Performance Testing Platform. Additionally, Guangzhou Zhiguang Energy Storage Technology Co., Ltd., in partnership with Shanghai Zhonglv New Energy Technology Co., Ltd., Shanghai Jiao Tong University, and Huaqing Storage Creation Technology Co., Ltd., declared the product the product The 35kV Self-Synchronized Voltage Source High Voltage Direct Mounted Energy Storage System. Both products were awarded the First Prize in the field of energy storage support technology (integration).
National Advanced Energy Storage Technology Innovation Challenge is a national event in the energy electronics industry. The competition features four tracks: solar photovoltaic, new energy storage products, key terminal applications, and key information technology applications. Its goals are to capitalize new development opportunities in the energy electronics industry, promote technological innovation, enhance core competitiveness, promote collaborative development between industry, academia, and research, build a platform for energy electronics industry exchange, innovation, and integration, and accelerate the cultivation of new quality productivity. This competition received a total of 297 entries from over 20 provinces and regions across the country. After formal review, preliminary rounds, and other competition evaluation processes, a total of 101 entries made it to the finals.
New Energy Storage Grid-connected Performance Testing Platform innovatively proposes a strategy and cascade control technology combining virtual impedance and inductance. Based on the full wave Fourier algorithm, a massive data automatic real-time analysis software has been developed, which can quickly and efficiently achieve accurate analysis of massive test data. This product is superior to traditional detection equipment in simulating fault functions, power grid simulation device structure, data analysis capabilities, and other aspects. Its main technical indicators have reached the international leading level. Its application scope includes system debugging, grid performance testing, and operation effect evaluation of energy storage on the grid side, power supply side, and user side. It is suitable for energy storage devices with different technical routes such as cascade, string, and centralized, and can be widely used in lithium battery energy storage, flow battery energy storage, lead-acid battery energy storage, and flywheel energy storage. It covers the grid connection detection requirements of grid following and grid building technologies, as well as other special requirements, and can effectively discover grid connection defects and faults of new energy storage devices, providing a safeguard for the safe grid connection of new energy.
The 35kV Self-Synchronized Voltage Source High Voltage Direct Mounted Energy Storage System pioneered a "building block" system construction method based on standard energy storage sub modules, adopting advanced high-voltage direct hanging energy storage topology architecture, with a maximum single machine capacity exceeding one hundred megawatts, and ensuring stable system operation through redundant module bypass mechanism. Through active safety control of the battery state throughout its lifecycle and multi condition adaptive fast SOC balancing technology, the system cycle efficiency has been improved to over 92%, solving the problem of insufficient utilization of the end of charge and discharge power. The battery capacity utilization rate is greater than 90%. By adopting self synchronous voltage source control technology, autonomous inertia response and wide short-circuit ratio operation are achieved. Through constant internal potential and adaptive virtual admittance transient control technology, the voltage source characteristics are always maintained under current limiting, which not only achieves spontaneous instantaneous support of reactive voltage, but also solves the stability problem of new power system grid connection under "double high" state. The new energy+energy storage joint operation control technology, with high-voltage direct hanging energy storage as the core, realizes black start, islanded load stable operation, and multi machine oscillation stabilization control of new energy stations. Through coordinated control and flexible scheduling of synchronous machine operation characteristics at the site level, it helps new energy sources become the main power source in the new power system as soon as possible.
R&D innovation is the core driving force of enterprise technology progress, for a long time, Zhiguang Electric attaches great importance to cooperation with the industry chain of upstream and downstream enterprises, colleges and universities, research institutes and other institutions of research and development, and in the prototype development, evaluation of the results, technology promotion, industrial application and other aspects of the fruitful results. The declared projects of this Energy Storage Technology Innovation Competition are the results of the deep integration and innovation between the company and its cooperative units in the fields of industry, academia, research and application, which is a high affirmation of the company's long-term adherence to technological innovation, continuous improvement of product performance, and leading the industry's technological advancement, and further affirms Zhiguang Electric's technological sophistication in the fields of new energy storage and grid-connected performance testing equipment and energy storage system integration.
In the future, Zhiguang Electric R&D technical team will continue to uphold the concept of innovation, work together to enhance the scientific and technological innovation capacity of the energy storage industry, in-depth promotion of the progress of energy storage technology, and strengthen cooperation with the upstream and downstream enterprises of the industrial chain, universities, research institutes, and is committed to developing more efficient, safe and reliable energy storage products, and contributing to the promotion of China's energy security and green development.
