To explore the application potential of energy storage and promote its integrated application promotion in the power grid, this paper studies the comprehensive application and configuration mode of battery energy storage systems (BESS) in grid peak and frequency regulation. . Without robust energy storage solutions, grid operators risk blackouts, equipment damage, and revenue loss. “Frequency regulation accounts for 30% of grid ancillary service costs in Guangdong Province. ” – 2023 China Power Sector Report Lithium-ion battery systems now respond to frequency changes. . Theintegrationofrenewableenergyintothepowergridposesinherent 1 risks and complex challenges due to the volatile nature and seasonal variations of these energy sources. The environmental and sustainable urban development would be directly affected w nt in v ilot demonstration projects for "new energy + energy storage. It is currently the largest single electrochemical storage facility in the country (Image: Ma Mingyan / China News Service / Alamy) In February 2025, China shelved a requirement that new domestic. .