recently, Shanghai electric power transmission and distribution group has made a major breakthrough in the project of "research and application of key technologies for electrochemical energy storage black start and frequency modulation" of Hubei huadian wuchang thermal power branch, and successfully completed the verification of key nodes for black start of 9E gas turbine unit for energy storage start. This test is the first engineering application of the group's network-type energy storage technology in the field of gas turbine black start, successfully verifying the stability and reliability of the group's self-developed energy storage system as a gas turbine black start power supply, and providing an empirical model for the application of network-type energy storage in the field of emergency support on the power generation side.

this project adopts the 9MW/9MWh lithium iron phosphate battery network energy storage system independently developed by the group as the core equipment, which is the first time that the group has applied the innovation of self-developed energy storage products to this field. With the ability of full-scene resource integration and complete technical equipment system, the Group has created an exclusive solution for gas turbine black start, successfully filling the solution gap in this field, and also marking a new leap forward in the high-end application scenario of the Group's network-based energy storage technology.

The black start of the gas turbine is a key link in the power system to deal with extreme accidents. The gas turbine cannot be started autonomously. During the start-up process, the equipment is frequently switched and the impact load is extremely large. It puts forward extremely high requirements on the voltage stability, response speed and load adaptability of the external start-up power supply. The traditional black-start power supply has pain points such as slow response and limited resource distribution. The power transmission and distribution group adopts virtual synchronous machine (VSG) control technology for the grid-type energy storage PCS system developed by 9E gas turbine unit, which can independently establish and maintain stable voltage and frequency in an environment without any power grid support. Through the self-designed coordination controller, the stability problem in parallel operation of multiple machines is effectively solved, and has the ability to withstand the impact of the transformer's strong current, to ensure that the whole process of black start is safe and controllable, and to accurately match the strict power supply requirements of the gas turbine black start.

Under the background of accelerating the construction of new power systems, the demand for reliable black start resources in power grids continues to rise. With the advantages of rapid response, flexible deployment and high stability, energy storage systems are gradually becoming the ideal choice in the field of power emergency support, and the technical value and application space of grid-based energy storage are further highlighted. In this context, the group took the lead in completing the engineering verification in this field, which not only verified the mature application capability of the group's network-type energy storage products under high-demand and complex engineering scenarios, but also opened up the new application space of the group's network-type energy storage products in the field of power emergency support, accumulated valuable engineering experience for subsequent similar projects, and greatly improved the group's market competitiveness in the high-end energy storage application field.

This technological breakthrough is an important practice of the Group's "1 2 N" layout, which further enriches the application scenarios of the Group's grid-based energy storage technology, achieves an important supplement to the power generation side solution system, and consolidates the Group's leading position in high-end energy storage technology. The Group will continue to deepen the multi-scenario application of energy storage products, with project iteration technology to help the construction of new power systems.