*3.1. General View*

In general, the main components of BESS are batteries, battery management system (BMS), energy management system (EMS), power conversion system (PCS), fire detection and suppression system, heating system, ventilation, air conditioning (HVAC), Uninterruptible Power Supply (UPS), container, transformer (if voltage increase is required), cables (primary and secondary) and other auxiliary systems. Figure 3 shows the BESS and some of these components. The system installed at the Campo dos Ventos Wind Complex has two 500 kW PCSs that convert DC energy into AC or vice versa and is connected to the DC

side batteries and connected in parallel to the AC side wind generation bus. EMS controls PCSs and communicates with BMS and SCADA and contains all system applications.
