Comprehensive Analysis of Energy Storage Power Station Systems

This document provides a comprehensive analysis of energy storage power station systems, covering basic knowledge, technical routes, and system components. It defines energy storage technology as the use of chemical or physical methods to store electrical energy for later use, highlighting the Battery Energy Storage System (BESS) which utilizes lithium-lead batteries. The system comprises an energy storage unit (battery pack, BMS, PCS) and a monitoring and dispatching unit (central control system, EMS). Key technical routes include lead acid, flow, sodium sulfur, and lithium-ion batteries, with a focus on lithium iron phosphate and ternary types. The document compares their properties: ternary batteries offer higher energy density but lower safety and cycle life, while lithium iron phosphate provides better safety and longer cycle life. It deconstructs the energy storage system into battery packs and '3S' (BMS, EMS, PCS), noting that batteries account for 53% of costs, PCS 11%, BMS 9%, and EMS 5%. The upstream includes raw materials and components, downstream includes power plants, grids, and users. Applications range from peak shaving and frequency modulation to wind-solar integration and grid storage.