At the supervisory meeting, representatives from the Shanghai Electric Power Research Institute gave a comprehensive report on the overall implementation, research progress, research results and effectiveness, fund utilization, completion of assessment indicators, and next steps of the research project on plug-and-play battery energy storage power station technology. The expert supervisory team highly praised the significance and depth of the project's research, fully affirmed the research achievements to date, and provided suggestions for future work.
With the large-scale application of energy storage, the grid connection of energy storage systems poses significant challenges to the primary grid structure, automation control, and management level of the distribution network. One of the key difficulties in grid connection coordination control technology for energy storage systems is achieving flexible and effective control of battery energy storage systems and smooth switching and stable operation across different operating states of the distribution network. The Plug-and-Play Technology Research Project for Battery Energy Storage Power Stations was launched in February 2017. The project aims to overcome the grid connection challenges after the large-scale application of energy storage systems, thereby improving the effectiveness and convenience of grid connection operation. The project team studied the plug-and-play technical architecture, information interaction mechanism, and key implementation technologies from both the energy flow and information flow perspectives of battery energy storage power stations. Simultaneously, the project team developed relevant physical information interfaces and completed a demonstration of plug-and-play grid connection of battery energy storage power stations and a comprehensive benefit assessment.
This project is based on the plug-and-play technology framework for battery energy storage power stations. It focuses on four sub-projects: research on the plug-and-play technology architecture and grid-connected information interaction mechanism of battery energy storage power stations; research on multi-state operation and smooth switching technology of battery energy storage power stations at the energy flow level and the development of plug-and-play physical interface equipment; research on self-description and interoperability technology of battery energy storage power stations at the information flow level and the development of plug-and-play information interface equipment; and demonstration application of plug-and-play grid connection of battery energy storage power stations. The aim is to enable battery energy storage power stations to leap directly from restricted and fixed access to orderly access, realize true plug-and-play functionality, promote friendly interaction between regional power grids and battery energy storage power stations, and improve the adaptability of battery energy storage power stations in different application scenarios.
The project team has published two papers in EI and core journals, with one EI paper accepted ahead of schedule. They have also applied for five invention patents, fulfilling all the phased research progress requirements and deliverables outlined in the project task book. Furthermore, they have exceeded the targets set in the task book by developing and publishing one invention patent, one group standard from the my country Electrotechnical Society, and one company standard from the State Grid Corporation of China. The team has also progressed ahead of schedule in areas such as prototype manufacturing and demonstration platform construction.
Next, the Shanghai Electric Power Research Institute will, based on the opinions of the experts from the supervisory group, organize the project team to continue to conduct in-depth research on key technologies for plug-and-play battery energy storage power stations, and promote demonstration applications as soon as possible, laying the foundation for successfully passing the acceptance inspection by the State Grid Science and Technology Department in 2020.
