The world's first full-line flywheel energy storage system has been successfully put into operation recently. The flywheel energy storage system device produced and manufactured by Qingdao Donghu Green Energy Research Institute (hereinafter referred to as "Qingdao Donghu Green Energy Research Institute") has successfully completed on-site debugging on Line 6 of Qingdao Metro and achieved full-line trial operation.

This project adopts 1MW/40MJ high-power flywheel energy storage device, a total of 15 sets, arranged in 4 stations. It is the first full-line engineering application of flywheel energy storage system device in the scene of rail transit. It has broken through many core technologies of megawatt-level flywheel energy storage system and power equipment. It is the first large-scale engineering application project of megawatt-level flywheel energy storage with completely independent intellectual property rights in China, which marks a great leap forward in the large-scale engineering application of flywheel energy storage technology in China.