DIN IEC/TS 62933-3-2:2024-12

This part of IEC 62933 provides the requirements for power intensive and renewable energy sources integration related applications of EES systems, including grid integration, performance indicators, sizing and planning, operation and control, monitoring and maintenance. The power intensive applications of EES systems are usually used to improve the dynamic performance of the grid by discharging or charging based on corresponding control strategies. The renewable energy sources integration related applications of EES systems are usually used to mitigate short-term fluctuation and/or to keep long-term stability. This document includes the following applications of EES systems: - frequency regulation/support; - grid voltage support (Q(U)) ("volt/var support"); - voltage sag mitigation; - renewable energy sources integration related applications; - power oscillation damping (POD). When planning EES systems it is important to understand the purpose for which the EES system is to be used. It is also conceivable that EES systems can be used for more than one application. Therefore, the planned application(s) of the EES system in the grid to which it will be connected should be described. EES systems for energy-intensive applications generally require fast response times, frequent charge and discharge phase transitions, or additional reactive power exchange with the power supply system. Several mature EES technologies, in particular superconducting magnetic energy storage (SMES), supercapacitors, flywheel energy storage (FES), and high-performance lithium battery systems, have high power densities but low energy densities and can be used for these applications.